Probabilistic signal shaping for bit-metric decoding
Probabilistic signal shaping for bit-metric decoding
复制标题
用于比特度量解码的概率信号整形
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
Georg Böcherer
中科院分区：
文献类型：
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作者：
Georg Böcherer
提出了一个方案，将概率的信号与位模式解码结合在一起。数量符号。不带有塑形的塑料和BICM（GuillénIfàbregasand Martinez，2010年），分别为0.87 dB和0.15 dB，并且在编码调制能力的0.0094 dB之内。低密度均衡检查代码。
A scheme is proposed that combines probabilistic signal shaping with bit-metric decoding. The transmitter generates symbols according to a distribution on the channel input alphabet. The symbols are labeled by bit strings. At the receiver, the channel output is decoded with respect to a bit-metric. An achievable rate is derived using random coding arguments. For the 8-ASK AWGN channel, numerical results show that at a spectral efficiency of 2 bits/s/Hz, the new scheme outperforms bit-interleaved coded modulation (BICM) without shaping and BICM with bit shaping (Guillén i Fàbregas and Martinez, 2010) by 0.87 dB and 0.15 dB, respectively, and is within 0.0094 dB of the coded modulation capacity. The new scheme is implemented by combining a distribution matcher with a systematic binary low-density parity-check code. The measured finite-length gains are very close to the gains predicted by the asymptotic theory.