Abstract:
A method for decoding a codeword transmitted over a channel demodulates data received over the channel to produce an initial estimate of belief messages for bits of the codeword and decodes the codeword using a belief propagation, BP, decoding that iteratively passes the belief messages between a set of variable nodes representing the bits of the codeword and a set of check nodes representing parity-check constraints on the bits of the codeword until a termination condition is met. The BP decoding selects a look-up table, LUT, from a plurality of LUTs based on a probability of the belief messages and maps, using the LUT, values of at least two incoming (quantized) belief messages to values of at least one outgoing belief message that forms an incoming belief message in a subsequent iteration of the BP decoding. An optimal LUT is selected according to the current probability statistics of the belief messages so that the mutual information is maximized. The probability statistics can vary with iterations, stages within cascaded node processing, SNR values, modulation formats, values of Galois fields, scheduling of processing and quantization levels.
Abstract:
In a particular aspect, an apparatus includes a first network interface. The first network interface is configured to receive a packet via a packet-switched network. The packet may include a primary coding of a first audio frame and a redundant coding of a second audio frame. The apparatus further includes a processor. The processor is configured to generate a modified packet that includes one or more bits that indicate signaling information or packet decoding information. The signaling information or packet decoding information may correspond to decoding of at least one of the primary coding or the redundant coding. The apparatus further includes a second network interface configured to transmit the modified packet via a circuit-switched network.
Abstract:
An apparatus includes a network interface configured to receive, via a circuit-switched network, a packet. The packet includes a primary coding of a first audio frame, redundant coding of a second audio frame, and one or more bits that indicate signaling information. The signaling information corresponds to a decode operation of at least one of the primary coding or the redundant coding. The apparatus further includes a decoder configured to decode a portion of the packet based on the signaling information.
Abstract:
Data of different types are received on a plurality of data lanes of a physical link. Particular data is received on at least a portion of the plurality of data lanes, and a stream signal, corresponding to the particular data, is received on another of the lanes of the physical link, where the particular data is of a particular type different from other data previously sent on the plurality of data lanes. The stream signal includes a code component indicating that the particular data is of the particular type and a parity component for use in identifying whether a bit error is present in the stream signal.
Abstract:
The disclosure relates to a mobile communication system (100b), including: a first transmission path (110) configured to transmit a message (u) according to a first radio access technology (104); a second transmission path (111) configured to transmit the message (u) according to a second radio access technology (105); and an encoder (101) configured to encode the message (u) by a code before transmission of the message (u) over the first transmission path (110) and the second transmission path (111), wherein the code comprises at least two subcodes (c1, c2), and wherein the encoder (101) is configured to encode the message (u) intended for transmission over the first transmission path (110) with a first subcode (c1) of the at least two subcodes (c1, c2) and to encode the message (u) intended for transmission over the second transmission path (111) with a second subcode (c2) of the at least two subcodes (c1, c2).
Abstract:
A communication system is configured to use coded modulation architecture using sparse regression codes. A transmitter includes at least one antenna configured to receive a signal comprising a plurality of layers and a processing circuitry configured to: allocate power individually to each of the plurality layers, encode a subset of the plurality of layers, the subset comprising a number of layers less than the whole, and generate data by interleaving the subset of the plurality of layers. A receiver includes at least one antenna configured to receive data and a processing circuitry configured to divide the received data into a plurality of layers, perform layer-by-layer decoding on the received data, and de-interleave a lower layer of the plurality of layers.
Abstract:
방송 신호 송신기가 개시된다. 본 발명의 실시예에 따른 방송 신호 송신기는, 베이스밴드 포매팅을 수행하고 적어도 하나의 PLP(Physical Layer Pipe) 데이터를 출력하는 인풋 포매팅 모듈; 상기 PLP 데이터를 에러 정정 프로세싱하는 BICM 모듈; 상기 PLP 데이터를 인터리빙하고, 신호 프레임을 생성하는 프레이밍 및 인터리빙 모듈; 및 상기 신호 프레임에 프리앰블을 삽입하고 OFDM 변조를 수행하여 방송 신호를 생성하는 웨이브폼 생성 모듈을 포함한다.
Abstract:
Methods, systems, and devices for soft hybrid automatic repeat request operation in wireless communication are described. A user equipment (UE) may fail to decode a received signal, for example. The UE may store a portion of the signal in a buffer if the signal size is greater than the buffer size; otherwise, the UE may store the entire signal in the buffer. The UE may then receive a second signal and combine the second signal with the stored portion of the first signal; the combined signal may be larger than the buffer size. This combined signal may, for example, have a code rate less than the first signal. The UE may perform a second decoding attempt on the combined signal. The UE may determine that the second decoding attempt failed and may store a portion of the combined signal in the buffer.
Abstract:
A method for operating a transmitting device includes mapping data to a transmission symbol in accordance with a constellation map assigned to a receiving device, wherein the constellation map is designed in accordance with a posteriori error rate derived from a transmitted signal, and transmitting the transmission symbol.
Abstract:
Provided is a receiver which includes at least one processor configured to control or execute: a first Bit-Interleaved Coded Modulation (BICM) decoder configured to generate a first output signal corresponding to an upper layer signal by processing a first input signal which includes a superposition coding signal generated at a transmitter by superimposing the upper layer signal and a lower layer signal; a parity generator configured to generate at least one parity based on a result of the processing of the first input signal by the first BICM decoder; and a second BICM decoder configured to generate a second output signal corresponding to the lower layer signal by processing a second input signal which is generated using the parity generated by the parity generator.