论文部分内容阅读
针对码间干扰信道下的单载波通信系统,提出一种低复杂度、适用于任意高阶调制、基于线性最小均方误差准则的迭代频域均衡(FDE)算法,并引入信噪比-方差演进技术来预测迭代系统性能。基于信噪比-方差演进原理,对发射信号频谱进行整形优化,设计一种在频域可以快速实现的循环预编码。该预编码的引入既不增加循环前缀的所需长度,也不增加接收机端的均衡复杂度。仿真结果表明,循环预编码优化后系统所需的发射功率可以降低1~3 dB。
Aiming at the single-carrier communication system under the inter-symbol interference channel, an iterative frequency-domain equalization (FDE) algorithm with low complexity and suitable for any high-order modulation based on the linear least mean square error criterion is proposed. Evolutionary Techniques to Predict Iterative System Performance. Based on the signal-to-noise ratio-variance evolution principle, the spectrum of the transmitted signal is shaped and optimized, and a cyclic pre-coding that can be quickly implemented in the frequency domain is designed. The introduction of this precoding neither increases the required length of the cyclic prefix nor increases the equalization complexity at the receiver side. The simulation results show that the transmit power required by the system optimized by cyclic precoding can be reduced by 1 ~ 3 dB.