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本文提出一种用微处理器实现自适应回波消除器的新方法。由于回波信号的估值直接利用二进数据码合成,使运算量比传统的算法减少了3～5倍。文中讨论了这种系统的数学模型、均方准则下的随机梯度调节算法及其收敛特性。最后给出了用计算机模拟和用Intel-8086通用微处理器实现消除回波的某些实验结果。
In this paper, a new method of implementing adaptive echo canceller with microprocessor is presented. Since the echo signal is estimated using the binary data synthesis, the computational complexity is reduced by 3 ~ 5 times than the traditional algorithm. The paper discusses the mathematical model of this system, the stochastic gradient adjustment algorithm under the mean square criterion and its convergence property. Finally, some experimental results of computer simulations and echoes elimination using Intel-8086 general purpose microprocessor are given.