RussianPatents.com
|
Circuits of transmitter for communication systems. RU patent 2258309. |
|
FIELD: communication systems. SUBSTANCE: one of methods is method for providing linear adjustment of level of output power of transmitter, containing device with multiple discontinuous setting values of amplification coefficient, and device with smooth adjustment of setting value of amplification coefficient, including steps for determining amplitude transfer function of transmitter for each said set of discontinuous setting values, forming of compensation table for amplification coefficient, receiving said setting values, reading compensated setting value of amplification coefficient from compensation table, adjustment of amplification coefficient. EFFECT: higher efficiency, broader functional capabilities, lower costs, higher reliability, higher durability. 9 cl, 27 dwg
|
Method for searching for cells in discontinuous transfer mode in mobile communications system / 2258307 Method includes measuring signal levels from adjacent cells and comparing these to their first threshold value. Then cells are searched for only by adjacent cells, having signal levels above first threshold value. In second variant cells are not searched for, if level of signals of active set is above second threshold value in discontinuous transfer mode. In third variant cells are searched for in offline mode and in discontinuous transfer mode at last stage of three common cells searching stages. |
Digital narrow-band signals detector / 2257671 Device has analog-digital converter, synchronization pulses generator, decision taking block, register for displacement of multi-digit codes for four counts, two quadrature processing channels, each of which has subtracter and serially connected count processing blocks. |
Transistor transmitter with automatic power adjustment / 2257670 Device has power amplifier, output power sensor, three comparison blocks, analog key, adder, adjustable voltage stabilizer with current sensor at output, threshold element, adjustable support voltage source, synchronization block, HF-switch, antenna, antenna equivalent with power indicator, analog-digital converter, digital comparison block, power level code generator, control block, sine-shaped signal generator, power indicator. |
Method for protection from artificial radio interference / 2257009 Method includes forming an additional detection channel, connected to main channel of receiver prior to its demodulation block, in which radio signal is detected on basis of parameter, determined by selected variant of method, synchronized filtration and selection of difference marks between informational and interfering signals in frequency filter, after that on basis of amplitude or angular parameters or their combination estimation of length of difference between informational and interfering signals is determined. |
Method for decreasing search time of pilot signal with use of information about position of mobile station and device for realization of said method / 2257008 Method includes determining position of mobile station using network, then position is used to determine dimensions of search port and information about other parameters of search, which is used for search for pilot-signals, identified in selected set of pilot-signals. Size of search port is also determined on basis of position of mobile station and another component, related to effects of multi-beam distribution for transmitted pilot-signal. |
Micromodule for frequency conversion of signals of satellite radio navigational systems / 2256936 The micromodule has a group of elements of the channel of the first frequency conversion signals, group of elements of the first channel of the second frequency conversion of signals, group of elements of signal condition of clock and heterodyne frequencies and a group of elements of the second channel of the second frequency conversion signals. |
System and method facilitating demodulation of fast paging channel through off-line paging device in radio communication system / 2256291 Proposed system has first means for detecting pilot signal associated with fast paging channel basing on signal received, this first means incorporating coherent integrator of first dimensionality and incoherent integrator of second dimensionality; second means for determining operating characteristics of system basing on pilot signal; and third means for optimizing first dimensionality and second dimensionality basing on operating characteristics. |
Method and device for predicting preferable transmission time intervals of additional channel using main-channel transmission power measurements / 2255424 Time interval showing preferable power level and data transfer speed for transmission over additional other-than-voice data channel is chosen basing on transmission power levels for voice data transferred over main channel from base station to remote one. Preferable transmission time interval is chosen without information about message transfer from remote station to base station concerning information about frequency channel or noise for additional channel. |
Device for separating transmit and receive signals in duplex communication system / 2255421 Newly introduced in transmit and receive signal separation device is transmission-gain control unit inserted in feedback circuit of second memory unit, its input being connected to adder output; this control unit has integrator, register memory, divider, and subtracter, all connected in series, maximal possible value being continuously supplied to second inputs of integrator; operating time of the latter is set by monostable multivibrator. |
System and method for high-precision prediction of signal-to-noise ratio and noise coefficient to improve communication system functioning / 2255420 System has first circuit for receiving signal transferred over channel through external transceiver, second circuit for generating series of estimates of signal-to-noise ratio and noise coefficient basing on signal received, third circuit for determining dependence between elements of estimate series, as well as fourth circuit using this dependence for predicting signal-to-noise ratio and noise coefficient for next signal received. |
Device and method for data transfer / 2249306 Data transfer device meant for realization of data transfer method contains at least one transferring device and one receiving device, block for determining characteristics of one or several data transfer channels for several methods for transferring data and/or several parameters of data transfer of one or several methods for data transfer and block for selecting method for data transfer with certain parameters of data transfer according to result of said determination, while determination block is made with possible determination of speed of change of data transfer channel, and selection block is made in such a way, that dependently on said speed of change it selects mode with suppression of interference in receiver or transmitter. |
Method for transferring telephone number in local radio communication line / 2248667 Proposed method enables user to immediately listen to return-call signaling tone as result of immediate execution of dialing in terminal of local radio communication line when user enters pulse signal by means of telephone hook upon dialing on standard telephone set connected to terminal of local radio communication line. Method involves checkup of telephone hook of standard telephone set connected to terminal of local radio communication line for condition. When telephone hook is found to be in off-position, telephone number is checked for dialing. If it is found that telephone number has been dialed, this number is stored in dialing buffer. Pulse signal is continuously checked for entering when dialing buffer stores telephone number. As soon as pulse signal is entered, telephone number stored in dialing buffer is conveyed to base station of local radio communication line. |
Circuits of transmitter for communication systems / 2258309 One of methods is method for providing linear adjustment of level of output power of transmitter, containing device with multiple discontinuous setting values of amplification coefficient, and device with smooth adjustment of setting value of amplification coefficient, including steps for determining amplitude transfer function of transmitter for each said set of discontinuous setting values, forming of compensation table for amplification coefficient, receiving said setting values, reading compensated setting value of amplification coefficient from compensation table, adjustment of amplification coefficient. |
Radio transmitting device incorporating provision for adapting to load / 2271605 Proposed short-wave radio transmitting device designed for operation into mismatched load has exciter 1, adjustable stage 3 and output stage 6, power supply in the form of pulsed power module 5 having drooping characteristic that provides for constant power supply to load and maintains field voltage across stage at level ensuring its operation under critical (optimal) conditions, pulse-width controller 4, and reference-voltage supply 12, as well as differential amplifiers 9, 13, multipliers 8, 11, output-signal peak value sensor 2, input-stage input-current sensor 10, and output-stage peak voltage sensor 7. |
Linearization device for amplifier with alternating amplification / 2273949 Transformed control signal is sent onto first circuit (input cascade fig.8) of linearization device, which generates a set of exponentially connected signals, for example, by means of differential amplifier, collector currents of transistors of which contain exponentially connected signals. Second circuit (output cascade) input linearization device is made on differential amplifier and receives to one of inputs and to its common point the exponentially connected signals of first circuit, and in response generates amplification control signal. By approximate synchronization of second circuit with amplifying cascade of amplifiers with alternating amplification and utilization of amplification control signal, generated by second circuit, transfer amplifier function of amplifiers with alternating amplification approximates appropriate characteristic of exponentially connected signals. |
Format distortion feedback (fdfb) / 2289880 Amplifier format distortion feedback (FB) consists of conversion deviation signal forming chain implemented using resistors (2,3) inserted between output and input of inverting amplifier (4), which has conversion slope control input (5). Received conversion deviation signal is multiplied by multiplier (1), whose signal adaptively defines amplifier (4) transfer characteristic slope. Such FB is adaptive non-linear, that is format distortion feedback (FDFB). |
Method for automatic adjustment of radio-electronic device and automatic adjuster / 2292126 Concept, upon which automatic adjustment method is based, assumes that user after manually adjusting a radio-electronic device records adjustments under name, appropriate for signal, in which adjustments took place, and on repeated receipt of this signal it is recognized and adjustment are read from memory automatically. For realization of idea automatic adjuster contains controlled block, signal recognition block, memory block and control code generator. |
Pulse-code signal selector incorporating automatic digital gain control / 2292639 Proposed pulse-code signal detector incorporating automatic digital gain control has channels, each one incorporating main amplifier connected in series with main threshold element, decoder connected in series with pulse shaper, and first switch whose data input is connected to decoder input and control input, to pulse shaper output; next-channel main amplifier gain is higher by an order of magnitude than that of preceding one; all channels are connected in parallel and newly introduced in each one are preamplifier whose gain is higher by an order of magnitude than that of next one and threshold element; input of entire selector functions as common input of all preamplifiers; preamplifier output is connected to data input of main amplifier and to input of additional threshold element; output of additional threshold element is connected to control input of main amplifier; each channel has phase protection unit; output of main threshold element is connected to input of phase protection unit whose output is connected to decoder input and to data input of first switch; outputs of first switches in each channel function as selector outputs. |
Method and device for increasing interference resistance of a receiver / 2305363 In accordance to the invention, in the method and in the device, power level of received signal is determined. If the power level equals or exceeds a predetermined threshold value, then amplifier 703 with low inherent noises is bridged 730. In alternative realizations, detector is used for high level of radio frequency power 105 for controlling amplification coefficient of input cascade 110 as a function of interference power. Continuous control over amplification coefficient makes it possible to suppress interference and to synchronize sensitivity of the receiver at lower signal levels, compared to the case of block with radio frequency amplification coefficient commutation block 730. Method of the invention allows synchronization of amplification coefficient at input with a predetermined value 1601. during operation of the receiver, change of control coefficient power of intermediate frequency signal 1605 is measured. If aforementioned change is less than the predetermined value 1610, then level of interference and signal is below the minimal noise level and, therefore, amplification coefficient is increased 1615. If the change of power of intermediate frequency signal exceeds a predetermined value, then presence of distortions is obvious and amplification coefficient is decreased to decrease the level of inter-modulation components 1620. Aforementioned process is used to produce best trade-off between interferences and noise factor during operation of the receiver. |
Automatic signal gain control method / 2345477 Invention refers to signal gain control devices in telecommunication equipment and specifically to VoIP voice gain control methods. Method contains the stages as followings: incomer measurements, simultaneous calculation of two, the first and second current gains based on measuring result, calculation of total gain by multiplication of the first and second current gains, and output gain control based on calculated total gain. |
Method and device for loudness level regulation / 2365030 Method and device for regulation of loudness level are offered. The device 1 of loudness level regulation contains a definition module 20, a memory module, the first counting module 24 and the second counting module 26. The first counting module 24 contains a comparator 240 and a multiplier 241. The definition module 20 receives an input acoustical signal where the input acoustical signal is connected with set of input sound sources and corresponds to one of the specified input sound sources, besides; the definition module mounts change of a corresponding input sound source of an input acoustical signal. The memory module keeps set of input sound records. The first counting module calculates an input acoustical signal according to an input acoustical signal and input sound records. |
© 2013-2014 Russian business network RussianPatents.com - Special Russian commercial information project for world wide. Foreign filing in English. |