D. M. Tee. (DMT) system and an adaptive bit exchange method and apparatus

摘要

The present invention discloses an adaptive bit exchange method and apparatus in a DMT system. In this method, the power spectrum density is measured using the 68th frame in the super frame to obtain the SNR, and the SNR is compared with the existing SNR to modify the bit and power allocation tables of the transmitting and receiving ends. And outputting the measured SNR to the transmitting end. The method and apparatus are simpler than those of the conventional method, and are simple in hardware. By sweeping bits and power using the actual SNR, accurate bit and power You can modify the allocation table.