基于判决反馈结构的自适应均衡算法仿真研究

在数字通信中，接收信号通常会受到码间干扰的影响，尤其是在多径衰落无线信道环境中，这种现象更为严重。采用自适应均衡技术可以对信道响应进行补偿。由于在数字通信系统中，信道往往为非最小相位系统，此时线性均衡器性能不佳，因此该文对比研究了非线性结构的自适应波特间隔判决反馈均衡器和自适应分数间隔判决反馈均衡器，并对其性能进行了计算机仿真。仿真结果表明，对于非最小相位信道，自适应分数间隔判决反馈均衡器的性能优于波特间隔判决反馈均衡器。

Simulation of Adaptive Equalization Algorithm Based on Decision Feedback Structure

In digital communications, the received signal is often corrupted by the inter-symbol interference, especially in the multipath fading wireless channel circumstance. The channel response can be compensated by adaptive equalization technologies. Since channel in the digital communication systems is generally a non-minimum phase system, a linear equalizer has a poor performance at this time. An adaptive baud-spaced decision feedback equalizer and an adaptive fractionally-spaced decision feedback equalizer based on non-linear structure are discussed comparably, and their performance is simulated by computer. The simulation result shows that the performance of the latter is superior to the former.