公开(公告)号：US20180226999A1

公开(公告)日：2018-08-09

申请号：US15467321

申请日：2017-03-23

申请人： Mitsubishi Electric Research Laboratories, Inc.

发明人： Ye Wang ,  Toshiaki Koike-Akino ,  Stark C. Draper

IPC分类号： H03M13/39 ,  H04L1/00 ,  H03M13/37

CPC分类号： H03M13/3961 ,  H03M13/09 ,  H03M13/13 ,  H03M13/251 ,  H03M13/27 ,  H03M13/2739 ,  H03M13/2792 ,  H03M13/2906 ,  H03M13/2909 ,  H03M13/2918 ,  H03M13/2927 ,  H03M13/2963 ,  H03M13/353 ,  H03M13/356 ,  H03M13/3753 ,  H03M13/3784 ,  H03M13/458 ,  H03M13/6502 ,  H03M13/6577 ,  H03M13/658 ,  H03M13/6594 ,  H04L1/0041 ,  H04L1/0045 ,  H04L1/0057 ,  H04L1/0058 ,  H04L1/0064 ,  H04L1/0071

摘要： A receiver includes a polar decoder for decoding an encoded codeword transmitted over a communication channel The receiver includes a front end to receive over a communication channel a codeword including a sequence of bits modified with noise of the communication channel and a soft decoder operated by a processor to produce a soft output of the decoding. The codeword is encoded by at least one polar encoder with a polar code. The processor is configured to estimate possible values of the bits of the received codeword using a successive cancelation list (SCL) decoding to produce a set of candidate codewords, determine a distance between each candidate codeword and a soft input to the soft decoder, and determine a likelihood of a value of a bit in the sequence of bits using a difference of distances of the candidate codewords closest to the received codeword and having opposite values at the position of the bit.

公开(公告)号：US20180352249A1

公开(公告)日：2018-12-06

申请号：US15608000

申请日：2017-05-30

申请人： Mitsubishi Electric Research Laboratories, Inc.

发明人： Petros Boufounos ,  Maxim Goukhshtein ,  Toshiaki Koike-Akino ,  Stark C. Draper

IPC分类号： H04N19/593 ,  G06F17/18 ,  H03M13/25

摘要： A method for reconstructing an uncompressed signal. The method includes obtaining an encoded signal corresponding to the signal. Obtaining side information about the signal and using the side information to obtain a prediction of dithered linear measurements of the signal. Using the prediction of the dithered linear measurements and encoded quantized dithered linear measurements to obtain quantized linear measurements of the signal based on processing each bitplane iteratively, starting from a least significant level bitplane to a most significant level bitplane. At each iteration, a prediction of each bitplane is formed using the prediction of the dithered linear measurements and the bitplanes processed in the previous iterations. Wherein each code for each bitplane is used to correct each bitplane prediction. Reconstructing the signal as a reconstructed signal using the recovered quantized dithered linear measurements, wherein the steps are performed in a processor of a decoder.

公开(公告)号：US20180227076A1

公开(公告)日：2018-08-09

申请号：US15467369

申请日：2017-03-23

申请人： Mitsubishi Electric Research Laboratories, Inc.

发明人： Toshiaki Koike-Akino ,  Ye Wang ,  Stark C. Draper

IPC分类号： H04L1/00 ,  H03M13/27 ,  H03M13/29 ,  H03M13/00

CPC分类号： H03M13/3961 ,  H03M13/09 ,  H03M13/13 ,  H03M13/251 ,  H03M13/27 ,  H03M13/2739 ,  H03M13/2792 ,  H03M13/2906 ,  H03M13/2909 ,  H03M13/2918 ,  H03M13/2927 ,  H03M13/2963 ,  H03M13/353 ,  H03M13/356 ,  H03M13/3753 ,  H03M13/3784 ,  H03M13/458 ,  H03M13/6502 ,  H03M13/6577 ,  H03M13/658 ,  H03M13/6594 ,  H04L1/0041 ,  H04L1/0045 ,  H04L1/0057 ,  H04L1/0058 ,  H04L1/0064 ,  H04L1/0071

摘要： A transmitter for transmitting an encoded codeword over a communication channel includes a source to accept source data, an irregular polar encoder operated by a processor to encode the source data with at least one polar code to produce the encoded codeword, a modulator to modulate the encoded codeword, and a front end to transmit the modulated and encoded codeword over the communication channel. The polar code is specified by a set of regular parameters including one or combination of parameters defining a number of data bits in the codeword, a parameter defining a data index set specifying locations of frozen bits in the encoded codeword, and a parameter defining a number of parity bits in the encoded codeword. The polar code is further specified by a set of irregular parameters including one or combination of parameters defining an irregularity of values of at least one regular parameter of the polar code, a parameter defining an irregularity of permutation of the encoded bits, a parameter defining an irregularity of polarization kernels in the polar code, and a parameter defining an irregularity in selection of de-activated exclusive-or operations on different stages of the polar encoding, and wherein the irregular polar encoder encodes the codeword using the regular and the irregular parameters of the polar code.