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。
Error propagation caused by noise can be avoided by precoding the data at the transmitter prior to modulation and decoding operation of received signals.
用于定位的基于信道模型的方法则比较接收信号强度测量值和根据无线信道模型创建的信号强度数据库。
A channel model based approach used in providing location positioning may compare receive signal strength measurements to a database of signal strengths created using a wireless channel model.
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