THE RESTRICTION ON OUTPUT SNR BY FINITE WORD LENGTH IN ADAPTIVE NOISE CANCELLER
有限字长对自适应噪声对消器输出信噪比的限制

The effects of finite word length in LMS adaptive noise canceller are discussed. The theoretical formula of output signal-to-noise ratio involving quantization noise and round-off noise are derived. If the variation of input weak signal can be reflected by certain word length, the output SNR mainly depends on the word length of adaptive operations.