基于逐符号检测的部分响应系统分析

The Partial-Response System with Symbol-by-Symbol Detection

利用部分响应信号(双二进制脉冲)可控地引入符号间干扰(ISI),设计可近似物理实现的发送滤波器和接收滤波器收发信号,牺牲功率利用率来换取较高的频谱利用率,使得符号传输速率达到奈奎斯特速率.在调制信号前采用数据预编码,对接收信号进行相应译码,以消除信道中噪声引起的差错传播.

A partial -response signal called duobinary signal pulse is used to control ISI in the system, which includes physically realizable transmitting and receiving filters for the transmission of signals. This operation is designed to get better frequency utilization efficiency at the price of power utilization and to achieve a symbol transmission of the Nyquist rate. Error propagation caused by noise can be avoided by precoding the data at the transmitter prior to modulation and decoding ooeration of received signals.