N. H. Ngo, S. S. Pietrobon, S. Barbulescu, C. Burnet
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引用次数: 2
Abstract
Amplitude phase shift keying (APSK) modulation presents an attractive scheme to overcome nonlinearity effects on nonlinear channels compared to conventional square quadrature amplitude modulation (QAM). In this paper, we investigate the performance of a bit interleaved coded modulation with iterative decoding (BICM-ID) system in which APSK modulation is used to achieve a spectral efficiency of 3 bit/s/Hz. A new iterative receiver is proposed where an extra soft-demapper is used between the two soft input soft output (SISOs) decoders. Extrinsic information exchange for the data and parity bits is optimised according to an appropriate iteration scheduling. Simulation results show a gain of 0.15 dB at a bit error rate (BER) of 10-4 with this new iterative decoding scheme and the optimised constellation over a nonlinear satellite channel
与传统的方正交调幅(QAM)相比，幅度相移键控(APSK)调制是克服非线性信道非线性效应的一种有吸引力的方案。在本文中，我们研究了比特交错编码调制迭代解码(BICM-ID)系统的性能，其中APSK调制用于实现3比特/秒/赫兹的频谱效率。提出了一种新的迭代接收机，在两个软输入软输出(SISOs)解码器之间增加一个软demapper。根据适当的迭代调度优化了数据和奇偶位的外部信息交换。仿真结果表明，在非线性卫星信道上，在误码率为10-4的情况下，该迭代译码方案的增益为0.15 dB
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