Method for pulse interference control based on localisation thereof using min-max threshold in adaptive radio signal receiving systems. RU patent 2519041.
 Computation of channel state feedback in systems using common reference signal interference cancellation / 2518758When enabled with common reference signal interference cancellation, user equipment (UE) may compute a channel state feedback value taking into account any cancelled interfering neighbouring signals. When neighbouring cells are determined to be transmitting data during the time for which the channel state feedback value is being computed, the UE is able to derive the channel state feedback value taking into account those cancelled interfering signals. The UE determines whether each neighbouring cell is transmitting during the designated time either by obtaining signals that indicate the transmission schedule of the neighbouring cells or by detecting the transmission schedule, for example based on the power class of the neighbouring cells. If the UE determines that the neighbouring cells are transmitting data during this time period, the UE will compute the channel state feedback value including consideration of the cancelled interfering signals. |
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 Method, system, user equipment and base station for transmitting uplink control information / 2517679Method includes sorting uplink control information (UCI) of each downlink carrier in X downlink carriers according to a preset sorting rule, where X is a positive integer, and the X downlink carriers belong to a downlink component carrier set of user equipment; calculating the number of modulation symbols occupied by UCI according to a first carrier set; calculating the number of bits after channel coding of UCI according to the number of modulation symbols occupied by UCI; performing channel coding for the sorted UCI of the X downlink carriers according to the number of bits after channel coding of UCI, mapping the channel coded UCI of the X downlink carriers to a physical channel, and transmitting the mapped UCI of the X downlink carriers. |
 Wireless communication method and device / 2517340Invention relates to wireless access techniques. Upon receiving a certain data unit by the receiving level of a wireless communication device, it is detected whether the previous data unit, preceding said certain data unit, has not been received by the receiving level. If so, a timer with an operating period which varies according to a parameter associated with reception of said certain data unit, is triggered in response. At the end of the operating period of the timer, the receiving level generates an error indication. |
 Adaptive control of data transmission rate / 2511641Present invention relates to means of adaptive control of data transmission rate, capable of estimating the real instantaneous value of the available quality of service of a link for transmitting data and controlling the data transmission rate based on the estimates. Feedback control can be both local with respect to the device for collecting analysis data, e.g. such as a magnetic resonance imaging coil, and on a link by reducing the data transmission rate, at least instantaneously, to match link performance in time. |
 Device for synchronisation in radio communication system with programmed operational frequency tuning / 2510933Invention relates to radio engineering and can be used in radio communication systems with programmed (pseudorandom) operational frequency tuning. To this end, one device combines the functions of determining signal time delay and signal frequency shift, and time spent on synchronising and determining Doppler frequency shift is reduced. Information signals with pseudorandom operational frequency tuning that are identical on form are used during synchronisation. The device is further simplified by excluding parallel receiving channels. |
 Method and apparatus for low-complexity interference cancellation in communication signal processing / 2510582In one aspect, flexible scaling may be understood as attenuating the amount of interference cancellation applied by a receiver, depending on the dynamically changing received signal quality at the receiver. More attenuation is applied at lower signal quality since the hard decisions are less reliable at lower signal qualities, while less (or no) attenuation is applied at higher signal qualities, reflecting the higher reliability of the hard decisions at higher signal qualities. Signal quality may be broken down into ranges, with different values of the flexible scaling factor used for each range. |
 Method and system for signalling configuration of physical uplink shared channel / 2509420Method includes steps where a base station sends downlink control information (DCI) to target user equipment through a physical downlink control channel (PUCCH); wherein the downlink control information includes orthogonal cover code information and/or cyclic shift information for scheduling the physical uplink shared channel in single antenna port transmission or multi-antenna port transmission. |
 Signal frequency generating device, automatically eliminating malfunctions in minimal time / 2507687Signal frequency generating device includes: a signal generator, a generator frequency and amplitude instability measuring device, a control unit configured to disconnect the signal frequency generating device from the power supply, and connect one of the backup sets of the signal frequency generating device in case of a fault, and a secondary power supply. |
 Signal transmission and reception apparatus and signal transmission and reception method / 2506705Invention relates to digital television (DTV) signal transmission/reception systems. The technical result is achieved due to that the signal reception method comprises steps of: receiving a signal transmitted in the radio-frequency band, which includes at least one radio-frequency channel, demodulating the received signal, analysing the signal frame preamble, which includes information layer 1 (L1) from the demodulated signal, reverse ordering information layer 1 bits, decoding the reverse ordered bits using an error-correction decoding scheme, which includes a shortening scheme and a perforation scheme, and obtaining physical layer channels (PLP) from the signal frame using the error-correction decoded information layer 1. |
 Device and method for sending and receiving information for detection of errors in communications system / 2258314Device has multiple cascade registers and multiple adders. During receipt of control information series operator forms a series of check connection bits and sends it to adders. After finishing of receipt operator serially adds given input bit to output bits of last register and outputs a result. Source value controller sends to registers a value selected from two source values. |
 Method for message transmission in feedback-incorporating system / 2259636On sending end of communication system data burst is coded by noise-immune code, service information is added to this code and transferred to communication channel. On receiving end frame synchronization of information sequence is made, noise-immune code is separated and decoded. Results of decoding are used to evaluate probability of message reception, and parameters characterizing quality of communication channel are determined. Channel quality is evaluated by average error probability per bit in communication channel and by error grouping coefficient; new length of data burst is chosen considering highest increase in speed of useful information transfer through communication channel. |
 Method for transferring information with use of adaptive alternation / 2265960Method includes continuously controlling quality of communication channel, on basis of results of which value of depth of alternation of word symbols of interference-resistant code is selected, interference-resistant code symbols alternation, interference-resistant code words and information packet, composed of symbols of several interference-resistant code words is transferred to communication channel, on receiving side symbols are shifted back as they were and words of interference-resistant code are reproduced, while average number of errors in interference-resistant code words is estimated, and selective dispersion of errors number in interference-resistant code words of received information packet is determined, and after receiving another information packet alteration of previous value of alternation depth is performed on basis of deviation of selective dispersion of errors allocation in words of received information packet from dispersion of binomial allocation law. |
 Turbo-decoding device and method / 2273093High-speed buffer memory is disposed between receiver buffer memory and turbo-decoding device and operates at same frequency as turbo-decoding device; decoding device reads out information bits stored in receiver buffer memory through high-speed buffer memory, enters delay for read-out information-bits for time required by turbo-decoding device, and then sends delayed information bits to decoding device including flexible input and flexible output of data incorporated in turbo-decoding device; information bit output is effected by receiver buffer memory at operating or clock frequency of turbo-decoding device. |
 Method and device for determining data transfer resources available for network connections / 2273958For determining amount of resources for data transfer and/or speeds of bits transfer for network connection, with known physical length of cable, measurement of energy spectrum is performed depending on transmission frequency for different types of modems by means of power measuring device, weakening is determined for different physical lengths and thicknesses of cable wires, depending on parameter of cross interference, number of sources and correcting coefficient on bass of energetic spectrum noise level is determined, while by means of gauss transformer module on basis of efficient signal levels and appropriate noise levels amount of data transfer resource is determined for different data transfer modulations and/or modulating codes for predetermined bit transfer speed, then available data transfer resource amount is corrected by means of correcting coefficient, including average deviation of stored amounts of data transfer resources from efficiency amounts of resources of data transfer, and on basis of stored efficient recourses for data transfer with utilization of known physical length of determined network connection available data transfer resource for appropriate network connection is determined. |
 Method for improved detection of speed errors in receivers with varying speed and device for realization of said method / 2284664In the method, frames are found for which data transfer speeds have been determined incorrectly, and processing is performed, providing for erasing of frames and/or clearing of memory to prevent expansion of distortion among multiple frames. Frames with erratically determined speeds of data transfer are found by checking unsanctioned transitions from one speed to another and reserve bits, confirming correctness of unused combinations of bits for filter and analyzing connections between transfer coefficients of fixed encoding table and transfer coefficients for linear prediction. |
 Symbol interlacing method / 2292654Method includes selection of operation mode in transmitter from at least one mode, while each operation mode is associated with a number of active carriers for transferring useful data, selection of interlacing symbol in aforementioned selected operation mode, usage of symbol interlacing in transmitter in relation with data element blocks, display of interlaced elements of data on active carriers of aforementioned selected operation mode, receipt of interlaced data elements in receiver, recognition in receiver of symbol interlacing symbol used during data transfer, selection of reversed interlacing symbol in receiver for match with recognized interlacing symbol and reverse interlacing in receiver of received data elements by means of selected reverse interlacing symbol. |
 Method and device for distributing resources in communication system with multiple inputs and outputs / 2294599In accordance to method, for possible data transmission one or more sets of terminals is formed, while each set includes unique combination of one or more terminals and matches hypothesis subject to evaluation. Formed additionally may be one or more sub-hypotheses for each hypothesis, while each sub-hypothesis matches certain assignment of several transmitting antennas to one or more terminals in hypothesis. Then efficiency of each hypothesis is evaluated, one of evaluated sub-hypotheses is selected, based on their efficiency. Then terminal (terminals) in selected sub-hypothesis is planned for data transmission, and after that data are encoded, modulated and transferred to each terminal, planned for transmission, via one or more transmitting antennas, assigned to terminal. |
 Reliable bit circuit for memorizing device of replaceable printer component / 2295754In accordance to suggested method for detecting error in data, received from memory device of replaceable printer component, ensured is first evenness control bit, associated with first data element. First data element and first evenness control bit are stored in memorizing device. Printer includes a set of electro-conductive lines. Memorizing device includes a set of bits. At least one of electro-conductive lines is associated with each bit. First data element and first evenness control bit are read from memorizing device. Electric test of at least one of electro-conductive lines is performed. Error is identified in first data element on basis of first evenness control bit, read from memorizing device, and electric test. Other inventions of group envelop printing system, two variants of realization of replaceable printer component for printing system and method for storing information in replaceable printer component are provided. |
 Transport-format data transfer / 2298878Channel coding and speed coordination TFCI indicator pointing to definite combination of cyclic redundancy code is generated in flexible layer one of GERAN network transmitter wherein data pointing to transport format combination are enoded and integrated with content data to be included in radio data burst using TFCI indicator generation process and information from medium access control layer. TFCI indicator is encoded in coding process and inserted in data stream by means of TFCI indicator insertion process. Each code incorporates more bits than respective TFCI indicator and unambiguously identifies TFCI indicator. Encoded TFCI indicator is expanded on pre-interleaved block with fractions disposed in fixed positions within each burst. Then interleaving is made by means of interleaving device. Encoded TFCI indicator used with 50% speed data transfer channel functions as central segment of encoded TFCI indicator used in respective 50% speed data transfer channel. Extra loss is negligible but FER characteristic is essentially improved compared with full-speed transfer codes due to enhanced useful load of content data bits. Amount of encoded TFCI data transferred in 50% speed mode ensures enhanced ratio of transport-format combination data encoding efficiency to content data encoding efficiency which is at same level as ratio in full-speed data transfer mode. |
FIELD: radio engineering, communication.
SUBSTANCE: invention relates to adaptive filtering. For a received observation signal, which is an additive mixture of a useful signal, noise and pulse interference, localisation and reduction of the effect of the pulse interference is achieved by forming an observation signal envelope, breaking down said signal envelope into L/N units (L is the length of the original observation signal, N is the size of the unit, where L is a multiple of N), selecting the maximum value of the envelope at each unit and forming a first sequence therefrom; using the obtained first sequence to form units of length M (L/N being a multiple of M), selecting the minimum value in each unit and forming a second sequence therefrom; further, using a cubic interpolation technique to plot a curve, where the L/N·M of interpolation node points, spaced apart by M·N, used are values of the second sequence, and the boundary node points used are the first and last values of the second sequence; the obtained curve is used as an estimate of the envelope of the useful signal and noise for calculating a min-max threshold, which takes into account the pulse interference detection error probability; the calculated min-max threshold is used to determine the intervals of influence (indices of initial positions, durations) of pulse interference in the original observation signal; when processing the observation signal on the interval of influence of each pulse interference, stopping and determining the state of the algorithm for calculating weight coefficients of adaptive channel distortion correctors or adaptive antenna systems; at the end of the interval of influence of pulse interference, launching the algorithm for calculating weight coefficients of adaptive channel distortion correctors or adaptive antenna systems.
EFFECT: pulse interference control procedure based on localisation thereof using a min-max threshold, reducing the negative impact of pulse interference on adaptive radio signal receiving systems, thereby improving quality of reception.
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The invention relates to the field of adaptive filtering, in particular, to systems of reception of radio signals, which use methods of struggle against pulse hindrances (PIS). It can be used to improve the radio reception quality by eliminating the negative impact of PI on the work of adaptive proofreaders channel distortion (AK) and adaptive antenna systems (AAS).
One of the factors that negatively influence the quality of the reception, is the external IP of in-band reception [3]. They have a random duration, wide spectrum and the energy, which significantly complicates the fight them [1, 2, 4-6, 8, 9, 12-14].
There is a method of struggle with PIS, based on the application of compensatory tract, disordered regarding the frequency of the received signal. The disadvantages of the method is the difficulty of forming a copy of FE in the compensation tract and estimation of its parameters, which significantly reduces the effectiveness of compensation.
Also known ways of dealing with PIS, which are based on the protection of the demodulator input from their exposure by limiting the amplitude of the signal observations, locking entrance of the decision on the interval IE or replacement signal observations on the interval IP noise implementation (or other auxiliary signals). The disadvantage of the first method are non-linear distortion of the received signal, the disadvantage of the second - the loss of information transmitted on the interval IE.
Known methods of linear filtering IP. The disadvantage is the smoothing fronts signals and, as a consequence, the decrease in the quality of reception. Methods are applied median filtering to suppress IE. They are characterized by two main advantages - good suppression of PIS with duration less than half the size of the window median filter. To the disadvantage of the nonlinear transformation of the received signal, resulting in the distortion of information [11].
The aim of the invention is to reduce the impact of IP on the work AK or AAC and improving the quality of reception of radio signals in conditions of influence of IE.
In the basis of the invention consists in the idea of reducing the impact of IE to work AK or AAC. The reduction of the impact achieved by the method stops adaptation and fixation of the state in the period of IE. In this case, a PI may lead to erroneous decisions, but did not break adaptive algorithm of the calculation of weighting coefficients AK or AAC. For estimation of time intervals actions PI proposed a procedure of their location using min-max threshold. Procedure to determine the intervals actions PIS and evaluate envelope of the useful signal and noise on the background of the entrepreneur.
To achieve the goal the invention of the method of combat of pulse noise on the basis of their location using min-max threshold in the adaptive systems of reception of radio signals, which for localization of IE form an envelope observations, break it up into L/N blocks (L is the length of the initial signal observations, N is the block size, L, times N), select the maximum value of the envelope on each unit and form of these first sequence; then obtained from the first sequence form the units of length M (L/N, fold M), in each unit, choose the minimum value and form the second of them the sequence; then use the method of cubic interpolation build curve, where the L / N·M nodal points of interpolation, located in increments of M·N, use the values of the second order, and in the boundary nodal points will choose the first and last values of the second sequence; the resulting curve is used as an estimate of the envelope of the useful signal and noise for calculating the min-max threshold, taking into account the probability of detection of an entrepreneur; calculated min-max threshold used to determine the intervals of action (indexes initial positions, durations) of FE in the original signal observation; signal processing observations at the interval of validity of each of the PIS are stop and record the state of the algorithm of calculation of weights adaptive proofreaders channel distortion or adaptive antenna systems; after the interval of validity of IE runs the algorithm of calculation of weighting coefficients AK or AAC.
The proposed technical solutions allows to reduce the effect of PIS on the operation of the algorithms for the calculation of weighting coefficients AK and AAC, improve the quality of received signals in comparison with the known methods of fighting PI [1, 2, 4-6, 8, 9, 12-14].
The invention is illustrated by drawings (figure 1). On the drawing (Fig 1) shows a device struggle with PI-based localization using min-max threshold in the adaptive systems of reception of radio signals.
The device struggle with PI-based localization (figure 1)contains: node 1 node formation signal envelope observation; node 2 node splitting the signal envelope observations on L/N blocks of length N times; node 3 node selection maximum values for each of the L/N blocks and the formation of the first sequence, the node 4 node splitting the first sequence on L/(N·M) of blocks duration M times; node 5 node selection minimal values on each L/(N·M) of units and formations from their second sequence; node 6 node cubic spline interpolation on the basis of the second sequence and calculation min-max threshold; node 7 node comparison envelope received signal monitoring with min-max threshold; site 8 - AK or AAC.
Let t=0,1...L-1 of the original signal monitoring the length L of the samples, which is an additive mixture of the useful signal s t , and impulse noise, t=0,1...L-1.
Site 1 is designed to obtain samples t Y signal envelope surveillance
wheret=0,1...L-1,
re(y, t ), im(y t ) - extract real and imaginary part of the original signal monitoring.
In the node 2 is split signal envelope observations Y t
t=0,1...L-1 to L/N blocks of length N times each:
Y j,i , j=0,1...L/N-1, i=0,1...N-1, where j - number of the block, i - number of reference signal envelope observations in the block.
Node 3 select the maximum value of the envelope of the signal observations in each of the L/N blocks and the formation of the values of the first sequence Y max :
, j=0,1...L/N-1, i=0,1...N-1.
In site 4 the split occurs first sequence Y max L/(N·M) of units length, M times each:
where k is the number of the unit, q is the number of the countdown sequence Y max in the block.
In site 5 select the minimum value in each of
L/(N·M) of the blocks of the first sequence, and the formation of these values, the second sequence Y min,max .
In site 6 via cubic spline interpolation is the formation evaluation envelope of the useful signal and noise S t each k block. As nodal points of interpolation, located in M·N times, use value , k=0,1...L/(N·M)-1 second sequence Y min,max , and as a boundary nodal points will choose the first and last
the values of the second sequence; the resulting curve is used as a threshold.
- assessment of the envelope of the useful signal and noise k block, where
t belongs to[k·N·M (k+1)·N·M], k=0,1...L/(N·M)-1;
a k , b k c k - spline coefficients for k-block, S k,t =a k - value of the function and its derivatives at the nodal points [7, 10].
The Association estimates S k,t , t belongs to[k·N·M (k+1)·N·M]on the whole interval of observation let S t , t=0,1...L-1.
Site 7 compares estimates of the envelope of the signal observations Y t calculated min-max threshold P t =S t +Δ(R Osh ), where
t=0,1...L-1,
Δ(R Osh ) - offset assessment S t , for a given probability of detection of an entrepreneur.
When exceeding the min-max threshold, the decision about the detection of IP and set a period of its validity (index starting position Idx, duration Dt).
wheret=0,1...L-1,
k belongs to[0,L-1],
Dt=Idx m-Idx 0 , the duration Dt is the difference between the indices m - 0 - the first count of the IP, if exceeded, min-max threshold.
Site 8 processes the signal observations y t in the interval of validity of each of IE (Idx, Dt) makes a stopover and captures the state of the algorithm of the calculation of weighting coefficients AK or AAC; after the interval of validity of IE runs an algorithm of the calculation of weighting coefficients AK or AAC. On leaving the node's estimation of the useful signal S t .
Implementation of the described method can be hardware, software, or firmware.
Achievable technical result of the proposed method is described above procedure struggle with PIS, on the basis of their location using min-max threshold, reduction of the negative impact of PI on the work of the adaptive systems of reception of radio signals and, as consequence, increase of the quality of reception.
Sources of information
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3. Venslauskas KK, Malakhov L.M. Impulse noise, and their effect on radio system (review). - Foreign Radioelectronics, 1978, №1, p.95-125.
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5. B. I. Kuzmin Impulse noise and analysis of noise-immunity (review). - Izv. universities. Electronics, 1981, V.24, n 4, p.4-16. Ivankin P.A., Lebedinsky E.V. ON the mathematical model of a random station interference in radio systems. - Radio engineering, 1983, V. 38, no. 6, p.47-50.
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The way to fight the impulse noise (IP) based on their location using min-max threshold in the adaptive systems of reception of radio signals, notable for localization of IE form an envelope observations, break it up into L/N blocks (L is the length of the initial signal observations, N is the block size, L times N), select the maximum value of the envelope on each unit and form of these first sequence; then obtained from the first sequence form the units of length M (L/N times M), in each unit, choose the minimum value and form the of them second sequence; then use the method of cubic interpolation build curve, where L / N·M nodal points of interpolation, located in increments of M·N, use the values of the second order, and in the boundary nodal points will choose the first and last values of the second sequence; the resulting curve is used as an estimate of the envelope of the useful signal and noise for calculating the min-max threshold, taking into account the probability of detection of an entrepreneur; calculated min-max threshold used to determine the intervals actions IP from their indexes initial positions and durations in the source the signal observations; signal processing observations at the interval of validity of each of the PIS are stop and record the state of the algorithm of calculation of weights adaptive proofreaders channel distortion or adaptive antenna systems; after the interval of validity of IE runs the algorithm of calculation of weights adaptive proofreaders channel distortion or adaptive antenna systems.