Abstract | ||
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The Hadamard transform (HT) over the binary field provides a natural way to implement multiplerate codes (referred to as HT-coset codes), where the code length N = 2p is fixed but the code dimension K can be varied from 1 to N−1 by adjusting the set of frozen bits. The HT-coset codes, including Reed- Muller (RM) codes and polar codes as typical examples, can share the same fundamental encoder/decoder architecture with the implementation complexity of order O(N logN). However, to guarantee that all codes with designated rates perform well, HT-coset coding usually requires a sufficiently large code length, which in turn causes difficulties in the determination of which bits are better for being frozen. In this paper, we propose to transmit short HT-coset codes in the so-called block Markov superposition transmission (BMST) manner. At the transmitter, signals are spatially coupled via superposition, resulting in long codes. At the receiver, these coupled signals are recovered by a sliding-window iterative soft successive cancellation decoding algorithm. Most importantly, the performance around or below the bit-error-rate (BER) of 105 can be predicted by a simple genie-aided lower bound. Both these bounds and simulation results show that the BMST of short HT-coset codes performs well (within one dB away from the corresponding Shannon limits) in a wide range of code rates. |
Year | DOI | Venue |
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2015 | 10.1109/TSP.2015.2439234 | Signal Processing, IEEE Transactions |
Keywords | DocType | Volume |
Fast Hadamard transform (HT),iterative soft successive cancellation,multiple-rate codes,short polar codes,spatial coupling. | Journal | PP |
Issue | ISSN | Citations |
99 | 1053-587X | 2 |
PageRank | References | Authors |
0.38 | 12 | 4 |
Name | Order | Citations | PageRank |
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Chulong Liang | 1 | 103 | 12.50 |
Jingnan Hu | 2 | 2 | 0.38 |
Xiao Ma | 3 | 487 | 64.77 |
Baoming Bai | 4 | 353 | 63.90 |