数字用户环路通信系统的通用数据位加载算法

Universal Bit-loading Algorithm for DSL Communication Systems

本文给出了双向对称比特率数据传输和双向不对称比特率数据传输两种传输模式数字用户环路通信系统的通用等效信道模型及其信噪比表达式,利用特定调制模式下的通信信道的误码率、比特位数与信噪比之间的关系构造了性能良好的通用数据位加载算法。对采用不同数据比特率传输模式的两种数字用户环路通信系统的仿真试验结果表明,本文算法比其他算法具有更好的性能。

Universal equivalent channel model and signal-to-noise expressions are developed for digital subscriber loop communication systems with either asynchronous or synchronous transmission mode. A versatile bit loading algorithm is proposed based on the relationship among bit-error-rates, bits and signal-to-noise ratio of the communication channel under special modulation mode. Simulation results of two communication systems with different transmission mode show that the proposed method has superior performance than some other existing methods.