编码与扩频码结合降低短波宽带系统PAPR

Combining Coding with Spreading Code to Reduce HF Broadband System's PAPR

短波宽带系统广泛应用于军事领域,但其峰均功率比过高。分析了影响短波宽带系统峰均功率比的因素,选择低峰均比格雷互补序列作为系统扩频码,编码方式采用具有格雷互补序列结构的雷德密勒码。理论上证明该方法可将系统峰均功率比控制在6dB以下,通过蒙特卡罗仿真验证了结论。同时,短波宽带信道下的误比特率曲线显示该扩频和编码方案具有一定的纠错能力。

HF broadband system is widely used in the military field, but it has high PAPR. The paper analyzes the factors causing high PAPR of HF broadband system, chooses low - PAPR Gray complementary sequence as the HF broadband system＇ s spreading code. The coding scheme is Reed - Muller code which has the structure of Gray complementary sequence. Both theoretical analysis and Monte Carlo simulation results show that this method can limit the PAPR below 6 dB. On Broadband HF Channel, the scheme has strong error correction capability.