利用限幅器改善Rayleigh衰落信道中Turbo乘積編碼PSAM系統(tǒng)的性能
Improving performance of turbo product coded psam using clipper in rayleich fading channels
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摘要: 該文研究了 Rayleigh衰落信道中 Turbo乘積編碼輔助符號調(diào)制(TPC-PSAM)系統(tǒng)的性能并提出一種利用軟信息限幅來改善的 TPC-PSAM性能的新方法,通過對不同的 Rayleigh衰落信道中 TPC-PSAM系統(tǒng)的性能仿真,結(jié)果表明在 10-4誤比特率下,這種新方法對 TPC-PSAM的性能有5～8dB的改善。
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關(guān)鍵詞:
- Rayleigh衰落信道; 引導符號輔助調(diào)制; Turbo乘積碼; 迭代譯碼
Abstract: The performance of Turbo Product Coded Pilot Symbol Assisted Modulation (TPC-PSAM) system is studied and a novel method to improve the performance of TPC-PSAM in Rayleigh fading channels by clipping the soft input information of decoder is presented in this paper. From the numerical simulation in different Rayleigh channels, it is concluded that the TPC-PSAM system with clipping soft information autperforms from 5dB to 8dB over the TPC-PSAM system at the bit error rate of 10-4. -
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