| 摘要 |
It has been pointed out that the initialization sequence contains many elements that are limiting loop coverage. One of these is the reliability of the protocol used for messages during the Exchange phase of initialization (NG-084). In particular, the fact that the indexes of the carrier used for exchanging the messages are fixed is the main performance limiting factor. Here, we propose to make these indexes adaptive according to the frequency distribution of the channel SNR. This is known as the Exchange phase takes place after Chann el Analysis, so that both transceiver can select the best 4 carriers (with the best SNR) to be used for the messages. The indexes of the 4 carriers can be exchanged using the reliable 1 bit/DMT symbol modulation.
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