TCM-16APSK在通信理论新技术中的应用研究

Research on the TCM-16APSK in communication new technologies

随着北斗卫星导航系统的广泛应用,非线性卫星信道性能的研究成为通信理论新技术中研究的热点。16APSK是一种非恒定包络调制技术,它充分利用信号平面的幅度和相位具有较高的功率和带宽效率,同时又有对抗非线性失真的内在特点,而格型编码是一种将编码和调制相结合的带宽有效和功率有效编码调制技术。在Saleh非线性模型的基础上,推导出带限非线性信道下TCM-16APSK的误码率公式,分析了其在高斯及带限非线性信道下的性能特点,并提出了基于RLS的均衡算法。仿真结果表明:RLS均衡算法能有效地改善非线性失真,保证了TCM-16APSK在非线性条件下的编码增益。

With the extensive application Beidou satellite navigation system, the performance of nonlinear satellite channel becomes a hot research in the new technologies of communication theory. 16APSK is a non-constant envelope modulation techniques which take advantage of the amplitude and phase of the signal has a higher power and bandwidth efficiency, and has the inherent characteristics of the against the nonlinear distortion. The trellis coding is a coding technique which combined modulation and coding. Based Saleh nonlinear model, the error rate is derived nonlinear equation under the band-limited channel of TCM-16APSK and their performance characteristics in the band-limited Gaussian and nonlinear channel is analyzed, and the equalization based RLS algorithm was proposed in this paper. Simulation results show that RLS algorithm can effectively improve the nonlinear distortion, ensuring the TCM-16APSK coding gain under nonlinear conditions.