基于最低误码率准则的奇次三阶Volterra均衡器用于干扰抑制
doi: 10.3724/SP.J.1146.2007.00582
Odd and Third-Order Volterra Equalizers Based on Minimum BitError Rate Criterion for Interference Suppression
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摘要: 该文针对通信系统中的干扰抑制问题，提出一种基于最低误码率准则的Volterra均衡器。区别于以往研究中采用最小均方误差准则估计Volterra核，本文采用最低误码率准则。仿真表明：对于扩展的二元相移键控信号，在相对强的窄带干扰下，匹配滤波器和基于最小均方误差准则的线性均衡器已失效，而基于最低误码率准则的Volterra均衡器仍能表现出良好的性能，也大大优于最小均方误差准则的Volterra均衡器；并且在计算复杂度与误码率性能的权衡中，奇次三阶Volterra均衡器更有实用价值。
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关键词:
- 通信信号处理 /
- 最低误码率准则 /
- 非线性均衡 /
- Volterra均衡器
Abstract: A novel Volterra equalizer based on minimum bit error rate principle is proposed in this paper for interference suppression in communications. The Volterra kernels are estimated based on minimum bit error rate principle and this is different from the previous literatures which are based on minimum mean square error. Simulation results show that when extended binary phase shifting keying signals are contaminated by relatively strong narrowband interference, the performance of matched filters and linear equalizers degenerate rapidly, but Volterra equalizers based on minimum bit error rate provide very low bit error rate, and their performance is also far better than that of Volterra equalizers based on minimum mean square error. Furthermore, it is found that odd and third-order Volterra equalizers are more practical than other order Volterra equalizers. -
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