Radio communications process

FIELD: radio communications using cellular communication systems; operating cellular communication systems and those under design.

SUBSTANCE: proposed radio communications process using cellular communication system depending for its operation on frequency reuse and sector structure of cells that incorporates provision for electromagnetic compatibility with electronic means of other cellular communication systems includes intentional division of frequencies assigned to each sector into several groups of different frequencies and radio coverage of disjoint-contour areas nested one into other for each j group by means of transceiving devices, j frequency group covering only j area. Subscriber terminals are primarily assigned priority of access to radio channels of frequency group covering innermost area of sector and only when these frequencies are unavailable and subscriber terminal is beyond this area, or radio channels of this group are completely busy, can this subscriber terminal be given access, also with priority, to radio channels of frequency groups whose numbers are reduced by one.

EFFECT: enhanced system capacity, reduced frequency resource requirement, system cost, and inherent noise.

4 cl, 1 dwg

 

The invention relates to the field of communications, and more particularly to a method of radio communication in the communication system based on the principle of re-use of frequencies with multiple access.

The increase in the number of operators and cellular subscribers exacerbates the problem of rational use of frequency resources, and this requires the development of new ways to improve the efficiency of reuse of frequencies.

The invention allows to increase the capacity of any system of communication for a given amount allocated for the operation of the system frequency bands or to provide the specified capacity smaller number of frequency bands, i.e. to save the frequency resource, improve quality and increase overall technical and economic efficiency of the system with all the components that affect its technical features and the full amount.

The invention relates to the cellular system, built in the form of a covering in the aggregate the entire service area of the cell. Simplified cell present in the form of a hexagon in the center of which is the system base station (SBS). SBS consists of several base transceiver stations (BPS), which can be in the same place (for example, on a single mast), and serving each azimuthal sector within the cell. Bpps can focus on General shall controller or to have their own controllers. Each BPS caters to all user terminals (AT) within their sector. When moving AT from one sector to another is transferred his services from one BPS to another, and when moving AT from one cell to another service is transferred from one SBS to another. All SBS, in turn, closed, at least one switching center (CC), which controls the entire system and provides access to other communication systems. The overall management of the work of the Central Committee and the communications system as a whole is the Central controller that is part of the Central Committee and with powerful software including reprogrammable part.

Real contours (boundaries) as cells and sectors have the shape of irregular curves, depending on the propagation and attenuation of radio waves, and are not clearly defined, the position of the SBS also only approximately coincides with the center of the cell. To clarify the essence of the invention consider the simplified cellular represented in the drawing.

The principle of re-use of frequencies is a basic principle of cellular communication system, which allows to increase the capacity of the system consists in using a close friend from other sectors of different frequency bands and in their repetition in sectors other cells under the scheme, providing socialnew EMC. ETOGES applies to the cells.

In practice, cellular use three main methods of multiple access - sharing limited portion of a frequency spectrum by many users: frequency, time and code division communication channels (for example, patent of Russian Federation CL H 04 b 7/26, No. 2104615). Also use abrupt rearrangement frequencies (U.S. Pat. RF, CL is the same, no 2119255).

For any multiple access system capacity with repeated use of the bands increase in several basic ways:

1) Go to the digital information processing and more perfect method of access from the frequency to the time and code.

2) Increase the repetition frequency, reducing the service area of the individual BS (crushing cells) and increasing the density of their placement in areas with heavy traffic. This is achieved by reducing the radiation power as SBS and AT decreasing the height of the suspension antennas and increase the angle of their pattern (Mavritansky. Basics of cellular communication. M.: Radio and communication, 2000, p.82; Technology and communication, 2002, No. 2, p.40).

3) To reduce the flow of handovers caused by crushing, assume the use of multilevel systems network building with service microsotf quickly moving AT, and microsotf - sedentary AT. At low traffic cells do not crush, who enlarges.

4) Apply a multi-sectoral SBS (3, 6, 9, 12, 16 sectors) using sectors directional antennas (U.S. Pat. RF, NV 7/26, No. 2172072; Wagamama. Standards and mobile radio systems. 1996, p.59-61, RIS, 3.6).

5) Occasionally use adaptive channel allocation in frequency and time division multiplexing. In this case, the frequency resource is not given in advance in a certain way between the cells of the cluster, and the whole or part is in operational order of the Central Committee, which allocates them to use the base station upon receipt of the call, i.e. in accordance with the actual traffic, but subject to the necessary territorial-frequency separation (for example, Mavritansky, CIT., 83; U.S. Pat. RF, CL H 04 b 7/26, No. 2154901).

6) Extend the allotted bandwidth, but this is of little use to the path.

To improve noise immunity of the system base station/SBS with the same frequency bands are removed from each other by a distance providing a given level socialnih, intersystem interference (Mavritansky. Basics of cellular communication. M, Radio and communications. 2000, section 2.4.2). There is a method of improving noise immunity in which SBS, creating mutual interference and in relation to each other which is the interfering set of active relays and AT with automatic adjustment of the transmission power of signals located the military near stranger interfering SBS, receive and transmit signals pereizlucheniya relays, frequency range which coincides with an operating range of frequencies AT, respectively, from their own and to their SBS (U.S. Pat. RF, CL is the same, no 2161866).

Known methods of radio communication aimed at increasing capacity and reducing intra-system interference communication systems. However, the fast development of mobile communication and investment in its creation and operation so large that you need a continuous further development, improvement, identify additional opportunities to improve technical and economic efficiency of communication systems.

As a prototype of the selected known method of communication (Mavritansky. Basics of cellular communication. M.: Radio and communication. 2000, p.23-24, 48-54,65) in the communication system based on the principle of re-use of frequencies, built in the form of a covering in the aggregate the entire service area of the cell system base station (SBS) and having a sector structure with the space sector Sk and maintenance of each sector of the base transceiver station (bpps) with the provision of radio communication terminals (AT), located within its BPS, and with the functional connection of all BPS and transfer of service from one BPS to another when moving AT from one sector to another and the transfer of services from one SBS to another lane when the placing AT from one cell to another, when bpps and respectively transmitting AT within the k-th sector, Mk radio channels allocated for communication systems k-th sector of frequency bands transmit and receive radio signals, radioaktiva the entire area of the sector, with the repetition of the required number of frequency bands used in the k-th sector, in sectors other cells under the scheme, providing the desired socialnew electromagnetic compatibility, carrying through the allocation of radio access terminals to the radio in specified order.

The disadvantage of the prototype compared with the claimed method is that it does not provide additional opportunities to increase capacity and reduce system noise communication systems, saving frequency resource and thus it is not possible to increase technical and economic efficiency of communication systems.

A method of radio communication in the communication system based on the principle of re-use of frequencies, built in the form of a covering in the aggregate the entire service area of the cell system base station (SBS) and having a sector structure with the space sector Sk and maintenance of each sector of the base transceiver station (bpps) with the provision of radio communication terminals (AT), located within its BPS, IP functional connection of all BPS and transfer of service from one BPS to another when moving AT from one sector to another and the transfer of service from one SBS to another when moving AT one cell to another, when bpps and respectively transmitting AT within the k-th sector, Mk radio channels allocated for communication systems k-th sector of frequency bands transmit and receive radio signals, radioaktiva the entire area of the sector, with the repetition of the required number of frequency bands used in the k-th sector, in sectors other cells under the scheme, providing the desired socialnew electromagnetic compatibility, carrying through the allocation of radio access terminals to the radio in specified order, wherein in each sector transceiver device base transceiver station, subdivided into j-th group where j varies from 0 to Lk a Lk can be different for different sectors, transmit and receive radio signals by the radio channels of the j-th groups of frequency bands that do not contain the same frequency bands allocated from the reserved sector for communications Mk frequency bands, in the aggregate of radiopacity square k-th sector and the j-th zone, nested one inside the other with the contours, quasimodogeniti the contour of the coverage of the k-th sector, without crossing with each other and with the contours of the coverage of other sectors and cells adjacent to the k-th sector, and the radio signals by radio to the j-th group bands together is adipexreviews only j-th zone k-th sector of squares Sj,k, satisfying the condition SLk,k<...<Sj,k<...<S2,k<S1,k<Sk, and the access terminals to the radio performed by means of selection of the group of frequency bands with the highest number j, is equal to Lk, and their inaccessibility in case of presence of a subscriber terminal in the k-th sector outside the radio coverage with the highest number or in the case of a finding in this area, but when fully occupied radio band transceiver devices with the highest number j, in series, with providing priority access to the radio channel groups of transceivers with umenjshenie unit numbers j up to a radio group of transceivers that is dedicated to providing overall coverage of the entire area of the k-th sector Sk, with reuse of the required number of frequency bands of the j-th group, used in the k-th sector, produce in sectors other cells are not necessarily the same for each j-th group schemes, providing the desired socialnew electromagnetic compatibility.

The number allocated to the j-th group of frequency bands of communication Mj,k is chosen to be close to the integer part of the ratio Mk·(Sj,k Sj+1,k)/Sk with j from 0 to Lk-1 and Mk·Sj,k/Sk if j=Lk, provided that M0,k+M1,k+...Mj,k+...+MLk,k=Mk.

In addition, each k-th sector j-Tye group of transceivers his bpps ereaut and receive radio signals by the radio channels of the j-th group of frequency bands, the corresponding j-th zone coverage with an area of Sj,k, is equal to (Sj-1,k-Sk·Mj-1,k/Mk), where j is from 1 to Lk, a, Mj,k is set for j from 0 to Lk, provided that M0,k+M1,k+...Mj,k+...+MLk,k=Mk.

Finally, in each k-th sector j-Tye group of transceivers his bpps with possibly large rooms j transmit and receive radio signals by the radio channels of the j-th group of frequency bands corresponding to the j-th zone coverage, most adjacent to the frequency bands employed in the area of k-th sector of electronic means of other communication systems.

The proposed method of radio communication increases technical and economic efficiency of the communication system by receiving and transmitting signals to the radio transceiver devices (SRD) its BPS on a new algorithm and implementation of the access AT the radio channels in specified order, but with a new build of priority access. This allows you to increase capacity, reduce intra-system interference, to ensure the electromagnetic compatibility of radio-electronic means of other communication systems, save frequency resource and consequently to reduce the cost of cellular systems.

Below the invention is described in more detail with reference to a drawing, schematically illustrating an implementation of the claimed method on the example of one sector.

The method applies to the action is the following, and projected cellular communication system different standards and can be used in conjunction with almost any known means of increasing the efficiency of use of frequency resource, complementing and developing them and giving, as shown below, a significant economic effect.

The proposed method is as follows.

The method applies to the communications system, constructed in the form of cells with SBS, conventionally located in the center of each of them. SBS provides radio AT all, within the cell. All SBS functionally connected with the General of the Central Committee, which transmits service from one SBS to another when moving AT from one cell to another. In turn, each SBS consists of several BPS, which can be in the same place (for example, on a single mast), and serving each azimuthal sector within the cell. Bpps can focus on a common controller or to have their own controllers. Each BPS caters to all user terminals (AT) within the sector. When moving AT from one sector to another is transferred his services from one BPS to another.

Radio devices (SRD) k-BPS and, accordingly, subscriber terminals located within the k-sector, transmit and receive radio signals on Mk radio channels from about the led for communication systems k-sector frequency bands, together radioactiva the entire area of the cell. The required number of frequency bands used in the k th sector, I repeat in sectors other cells under the scheme, providing the desired socialnew electromagnetic compatibility, as is common in communication systems based on the principle of re-use of frequencies. Access AT the radio channels provide a means of allocating radio channels specified in a particular communication system order.

To achieve a technical result of the invention shall take the following actions.

Each k-the foam sector BPS divided into j-tide group, where j varies from 0 to Lk a Lk can be different for different sectors. Each j-th group PPU sends and receives radio signals by the radio channels of the j-th group of frequency bands allocated from the reserved sector for communications Mk frequency bands, in conjunction with other frequency bands covering the j-th zone k-sector. In all j-mentioned groups use different frequency bands. All j-tide zone coverage invested in the contour of the coverage of the k-sector and one another and have contours, quasiedible the outline of coverage, covering the entire k-th sector. The contours of j's radio coverage must not overlap with each other and with the contours of the coverage of other sectors adjacent to ktomu sector. Area j's radio coverage of the k-th sector Sj,k of each cell satisfy the condition SLk,k<...<Sj,k<...<S2,k<S1,k<Sk, i.e. the inner zone has the highest number. When it is determined that the radio signals by the radio channels of the j-th group bands together cover only the j-th zone k-sector.

The required number of frequency bands of the j-th group, used in the k-sector re-use in other sectors of cells, not necessarily identical for each j-th group schemes, providing the desired, i.e. ensuring the specified communication quality, socialnew electromagnetic compatibility.

The next critical action providing in conjunction with the above achievement of the technical result is the access AT the radio. Namely, the access AT the radio channels by prominent means of allocating radio channels (for example, from U.S. Pat. RF, NV 7/26, No. 2154901) specified in a particular communication system order, but with the following priority. Access AT a primary role in the radio channels of the selected group of frequency bands with the highest number j (it is equal to Lk). The radio group of frequency bands with j=Lk can be available in two cases: 1) AT is outside the radio coverage of this group of frequency bands, and 2) AT is in the area of radiometry the Oia this selected group of frequency bands, but the radio channels of the selected group of frequency bands with the highest number of fully occupied. In this situation, access the radio channels of the selected group of frequencies with reduced per unit group number, i.e., for j=Lk-1. If for this group of radio channels is not available, then access the radio the next group with j=Lk-2. This process is sequentially repeated until the access to the radio channels from the group of frequency bands allocated to ensure overall coverage of the entire area of the k-sector Sk.

The control signals operate on the entire sector dedicated channels.

The implementation of the inventive method is shown schematically in the drawing. The radio system is presented in the form of a fragment of the totality sectorising different ways of cells covering the serviced territory.

The implementation of the method is demonstrated on a simple example of a 3-cell cluster with 6 sectors per cell, for which a dedicated 6 groups of frequency bands M1...M6 to ensure overall coverage of the entire area of the cell. Within each sector conditionally shows the contours of the radio coverage of each of the j - th groups PUF his BPS, conditionally placed in the center of the cell. Each group vies transmits and receives radio signals only from its j-th group of the allocated frequency bands. Each of the sects is re sample two areas, marked in Arabic numerals: for M1 - 1,2, M2 - 3,4 etc.

In each sector in General, the amount of foam and groups of frequency bands may be different and the radio coverage can have various sizes. Radio coverage j-tym groups selected frequency bands must not overlap with the coverage areas of adjacent (neighboring) sectors and cells.

Reuse of the required number of frequency bands from the same internal groups used in the cell can also be made in each cell, as shown in the drawing.

Implementation of access AT the radio show on the example of a sector with zones 1 and 2. Let AT is in the inner zone coverage 2. Then it provides access primarily to the radio channels of the selected group of frequency bands with the highest number, i.e. in this example 2. If the channels of this group will be engaged, AT provide access to the second queue to the radio channels of the selected group of frequency bands 1, zone coverage which extends over the entire cell and is limited in this example, the contour of the cell, covering an area of 2.

Now suppose that AT is 1 area. Then it is not available radio channels of the group of bands 2 and provides access to a group of frequency bands 1.

The density AT (number AT per unit area) can be considered with quite the precision is the same on all accepted his bpps the public sector. Then the number of radio channels Mj,k of the j-th group of frequency bands corresponding to the j-th zone coverage, which transmit and receive radio signals j-Tye group PUF his BPS, is determined from the condition of constancy of the number of ATS per channel, and given the space Sj,k j's radio coverage close to the integer part of the ratio Mk·(Sj,k Sj+1,k)/Sk with j from 0 to Lk-1 and Mk·Sj,k/Sk if j=Lk, provided that M0,k+M1,k+...Mj,k+...+MLk,k=Mk.

Has practical value option, which specifies the number of radio channels Mj,k for each j-th group of frequency bands corresponding to the j-th zone coverage, which transmit and receive radio signals of the j-th group PUF his BPS. Square Sj,k j is the radio coverage in this embodiment, under the same assumption and the condition is (Sj-1,k-Sk·Mj-1,k/Mk), where j is from 1 to Lk, a, Mj,k is set for j from 0 to Lk, provided that M0,k+M1,k+...Mj,k+...+MLk,k=Mk.

In the vicinity of a sector can be radio-electronic means of other communication systems operating in a certain frequency band. In this case, the same frequency bands can send and receive radio signals j-Tye group PUF his bpps by radio from the j-th group of frequency bands with possibly large numbers j, i.e. corresponding j-th zone coverage in the sector.

The use of the claimed method of radio communication allows the be increased the capacity of the communication system or the number of radio channels, per frequency band.

Released during the application of the claimed method of the group of frequencies allocated for communications, you can add in the most tense areas with intensive traffic. Accordingly, reduction of costs and costs of operation of the communication system.

We also note the following important circumstance. When creating a cellular network due to the high investment, the operators at the initial stages of construction of their systems aim to provide maximum area coverage with even a small amount AT. Further increase subscriber capacity by increasing the number bpps, sectorization and multiplying the number of channels occurs after entering the system in operation. This approach requires a simple increase in the number of foam BPS, but it may entail a complete change in the structure of their antenna-feeder equipment (AFO). In order to minimize the costs of modernizing the AFO that includes not only the actual cost of the equipment, but also quite time-consuming installation work, it is necessary at the initial stage of network design to provide ways of further development of the system as a whole and the possibility of changing the structure of a single BS. The use of the claimed method of radio communication would greatly reduce the ü these difficulties, and in some cases eliminate them.

Thus, the distinctive features of the proposed method radiocommunications provide new properties that are not achievable in the prototype and the like. The analysis has allowed to establish: analogues with a set of characteristics is identical for all features of the claimed technical solution is available, which indicates compliance with the stated method of communication the condition of “novelty”.

The results of the search of the known solutions in the field of communication in order to identify characteristics that match the distinctive features of the prototype of the characteristics of the claimed method of radio communication, showed that they do not follow explicitly from the prior art. Also revealed no known effect provided the essential features of the claimed invention of actions to achieve a specific result. Therefore, the claimed invention meets the condition of patentability “inventive step”.

1. Way radio communications in the communication system based on the principle of re-use of frequencies, built in the form of a covering in the aggregate the entire service area of the cell system of the base station in each and having a sector structure with the space sector Sk and service to every sector of its base transceiver station providing radio subscription term is s, within the base transceiver station, and with the functional connection of all base transceiver stations and the transfer from one base transceiver station to another when moving user terminal from one sector to another and the transfer from one base station to another when moving user terminal from one cell to another, in which the base transceiver station and respectively transmitting user terminals located within the k-th sector, Mk radio channels allocated for communication systems k-th sector of frequency bands transmit and receive radio signals, radioaktiva the entire area of the sector, with repeat the required number of frequency bands used in the k-th sector, in sectors other cells under the scheme, providing the desired socialnew electromagnetic compatibility, carrying through the allocation of radio access terminals to the radio in specified order, wherein in each sector transceiver device base transceiver station, subdivided into j-th group, where j varies from 0 to Lk a Lk can be different for different sectors, transmit and receive radio signals by the radio channels of the j-th group of frequency bands, not the content is, essentially the same frequency bands, allocated from the reserved sector for communications Mk frequency bands, in the aggregate of radiopacity square of the k-th sector and the j-th zone, nested one inside the other with the contours, quasimodogeniti the contour of the coverage of the k-th sector, without crossing with each other and with the contours of the coverage of other sectors and cells adjacent to the k-th sector, and the radio signals by radio to the j-th group bands together radioactivit only the j-th zone k-th sector with areas of Sj,k that satisfy the condition SLk,k<...<Sj,k<...<S2,k<S1,k<Sk, and the access terminals to the radio performed by means of selection of the group of frequency bands with the highest number j, is equal to Lk, and their inaccessibility in case of presence of a subscriber terminal in the k-th sector outside the radio coverage with the highest number or in the case of a finding in this area, but when fully occupied radio band transceiver devices with the highest number j, consistently providing priority access to the radio channel groups transceiver devices with umenjshenie unit numbers j up to a radio group of transceivers that is dedicated to providing overall coverage of the entire area of the k-th sector Sk, with reuse of the required number of frequency bands of the j-th group, use is used in the k-th sector, produce in sectors other cells are not necessarily the same for each j-th group schemes, providing the desired socialnew electromagnetic compatibility.

2. The method according to claim 1, characterized in that the amount allocated to the j-th group of frequency bands of communication Mj,k is chosen to be close to the integer part of the ratio Mk·(Sj,k Sj+1,k)/Sk with j from 0 to Lk-1 and Mk·Sj,k/Sk if j=Lk, provided that M0,k+M1,k+...Mj,k+...+MLk,k=Mk.

3. The method according to claim 1, characterized in that in each k-th sector of the j-th group of transceivers its base transceiver station transmit and receive radio signals by the radio channels of the j-th group of frequency bands corresponding to the j-th zone coverage with an area of Sj,k, is equal to (Sj-1,k-Sk·Mj-1,k/Mk), where j is from 1 to Lk, a, Mj,k is set for j from 0 to Lk, provided that M0,k+M1,k+...Mj,k+...+MLk,k=Mk.

4. The method according to claim 1 or 2, or 3, characterized in that in each k-th sector of the j-th group of transceivers its base transceiver station with possibly large rooms j transmit and receive radio signals by the radio channels of the j-th group of frequency bands corresponding to the j-th zone coverage, most adjacent to the frequency bands employed in the area of the k-th sector of electronic means of other communication systems.



 

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SUBSTANCE: proposed method intended for data transfer to mobile objects from stationary one residing at initial center of common mobile-objects route using electronic means disposed on stationary and mobile objects involves radio communications with aid of low-power intermediate transceiving stations equipped with non-directional antennas and dropped from first mobile object. Proposed radio communication system is characterized in reduced space requirement which enhances its effectiveness in simultaneous functioning of several radio communication systems.

EFFECT: reduced mass and size of transceiver stations, enhanced noise immunity and electromagnetic safety of personnel.

2 cl, 7 dwg, 1 tbl

FIELD: radio communications.

SUBSTANCE: proposed method intended for data transfer to mobile objects from stationary one residing at initial center of common mobile-objects route using electronic means disposed on stationary and mobile objects involves radio communications with aid of low-power intermediate transceiving stations equipped with non-directional antennas and dropped from first mobile object, these intermediate transceiving drop stations being produced in advance on first mobile object. Proposed radio communication system is characterized in reduced space requirement which enhances its effectiveness in joint functioning with several other radio communication systems.

EFFECT: reduced mass and size of transceiver stations, enhanced noise immunity and electromagnetic safety of personnel.

2 cl, 7 dwg, 1 tbl

FIELD: radio communications.

SUBSTANCE: proposed method for single-ended radio communications between mobile objects having common initial center involves use of low-power intermediate transceiver stations equipped with non-directional antennas and dropped from mobile objects. Proposed radio communication system is characterized in reduced space requirement and, consequently, in enhanced effectiveness when operating simultaneously with several other radio communication systems.

EFFECT: reduced mass and size, enhanced noise immunity and electromagnetic safety of personnel.

2 cl, 7 dwg, 1 tbl

FIELD: radio communications.

SUBSTANCE: proposed method intended for data transfer to mobile objects from stationary one residing at initial center of common mobile-objects route using electronic means disposed on stationary and mobile objects involves radio communications with aid of low-power intermediate transceiving stations equipped with non-directional antennas and dropped from first mobile object, these intermediate transceiving drop stations being produced in advance on first mobile object and destroyed upon completion of radio communications between mobile and stationary objects. Proposed radio communication system is characterized in reduced space requirement which enhances its effectiveness in joint functioning with several radio communication systems.

EFFECT: reduced mass and size of transceiver stations, enhanced noise immunity and electromagnetic safety of personnel.

2 cl, 7 dwg, 1 tbl

FIELD: radio communications engineering; digital communications in computer-aided ground-to-air data exchange systems.

SUBSTANCE: proposed system designed to transfer information about all received messages irrespective of their priority from mobile objects to information user has newly introduced message processing unit, group of m modems, (m + 1) and (m + 2) modems, address switching unit, reception disabling unit whose input functions as high-frequency input of station and output is connected to receiver input; control input of reception disabling unit is connected to output of TRANSMIT signal shaping unit; first input/output of message processing unit is connected through series-connected (m + 2) and (m + 1) modems and address switching unit to output of control unit; output of address switching unit is connected to input of transmission signal storage unit; t outputs of message processing unit function through t respective modems as low-frequency outputs of station; initialization of priority setting and control units, message processing unit clock generator, and system loading counter is effected by transferring CLEAR signal to respective inputs.

EFFECT: enhanced efficiency due to enhanced throughput capacity of system.

1 cl, 2 dwg

FIELD: radiophone groups servicing distant subscribers.

SUBSTANCE: proposed radiophone system has base station, plurality of distant subscriber stations, group of modems, each affording direct digital synthesizing of any frequency identifying frequency channel within serial time spaces, and cluster controller incorporating means for synchronizing modems with base station and used to submit any of modems to support communications between subscriber stations and base station during sequential time intervals.

EFFECT: enhanced quality of voice information.

12 cl, 11 dwg

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