自适应非线性符号间干扰的消除

提出了一种改进的非线性符号间干扰的消除技术。在接收机中,采取“先消除后匹配均衡”的结构方案,非线性信道估计器采用一阶Ｖｏｌｔｅｒｒａ核测量及自适应递推算法。与Ｂｉｇｌｊｅｒｉ系统相比,性能可改善２～３ｄＢ．计算量和存储量减少到１／Ｎ（Ｎ为信道响应样值数）．在弥散非线性信道上进行９．６ｋｂ／ｓ数据传输的模拟结果表明,我们提出的非线性消除技术可使１６ＱＡＭ系统的性能改善３～４个数量级。

Adaptive Cancellation of Nonlinear Intersymbol Interference

A new improved cancellation technique of nonlinear intersymbol interference is presented.In the receiver, a structure scheme "cancellation first, match and equalization later" is adopted. The first order Volterra kernel measurement and adaptive recursive algorithm are used for the nonlinear channel estimator. Comparing with Biglieri' s system, the Performance improvement of 2-3 dB can be obtained and the computation and memory requirement can be reduced by N times (N denotes the samples numoer of channel respeonse) in this system. Simulation results for 9. 6 kbits/s data transmission over a dispersive nonlinear channel show that the nonlinear cancellation presented in this paper can offer Performance improvement of 3- 4 orders for 1 6 QAM system.