一种HFDL信号Turbo均衡器设计与实现

摘要

为了提高恶劣条件下HFDL信号接收性能，设计了针对 HFDL 信号特征的 Turbo 均衡器。 HFDL⁃Turbo 均衡器充分挖掘了信号特征，并优化了前端均衡器和译码器结构。算法对多相信号进行单比特软值映射处理，避免交织之前的硬映射，并对重复编码信号采用矢量合成技术以充分利用编码增益。在未知信道条件下，完成了从信道估计、均衡和译码的全过程仿真，仿真结果表明设计的 HFDL⁃Turbo 均衡器在存在码间串扰条件下仍具有优异的均衡、译码性能。%In order to improve the HFDL signal receiving performance under severe conditions,the equalizer is designed in view of HFDL signal characteristics.The HFDL⁃Turbo equalizer fully uses the signal characteristics,and optimizes the structure of the front end equalizer and the decoder.In the algorithm,the MPSK signal is demodulated by single bit soft valve,avoiding hard mapping before inter⁃leaving,and the vector synthesis technology is used for repetitive coding signal to fully utilize the coding gain. Finally, under the unknown channel condition,the overall process simulation is implemented,including channel estimation,equalization and decoding.The simulation results show that the equalizer has better equalization and decoding performance under the ISI channel.