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讨论了离散多音频调制和网格编码相结合的调制方式在 DSL 中的应用 ,离散多音频调制 DMT[1 ]是一种多载波调制技术 ,将传输数据根据各子带信噪比按位分配到子带上 ,使每个子带码元宽度大于多径延迟。如果把调制和纠错编码结合起来 ,则可使误码率大大降低 ,是一种带宽利用率较高的调制方式
Discrete Multi-tone Modulation (DMT) [1] is a multi-carrier modulation technique that distributes the transmitted data bit by bit according to the SNR of each sub-band Onto the subband so that the width of each subband symbol is greater than the multipath delay. If the modulation and error correction coding combined, you can greatly reduce the bit error rate is a bandwidth utilization of higher modulation