A receiver training method for two-way transmission wired communication system

Abstract

A method for training a receiver of a bi-directional transmission wire communication system includes the following steps: step A, judging whether the transmitting end and receiving end have established line connection, if so, turning to step B, if not, returning to step A; step B, the transmitting end carrying out the training of the reflection signal canceller, and then transmitting the trainingsequence to the receiving end; step C, that receive terminal training the receive equalizer according to the training sequence, and then providing feedback of the training sequence to the transmittingterminal; step D, the transmit end receiving the train sequence and completing the training process of the two-way transmission cable communication system receive. The invention has the advantages that the method for detecting line connection does not need additional matching detection circuit, the method is simple, convenient to realize and saves cost, and the receiving end does not have any perception of line connection detection, and no compatibility problem is caused.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a receiver training method for a two-way transmission wired communication system. Background technique [0002] Two-way transmission wired communication system (such as vehicle Ethernet 802.3bw) realizes 100Mbps full-duplex transmission on a pair of twisted pairs, and the receiving end will receive the transmitted signal of the opposite end and the local reflected signal at the same time. In order to eliminate the impact of local reflected signals on reception, the receiver of a two-way transmission wired communication system is usually equipped with a reflected signal canceller, and then uses a receiving equalizer to compensate for channel distortion, so that the receiving end can correctly receive the sent information from the opposite end. Both the reflection canceller and the receive equalizer require appropriate training sequences to function properly, usually at diffe...

AI Technical Summary

Problems solved by technology

The master terminal transmits the training sequence. The premise of training the reflection signal canceller is that the two lines have been connected and matched. If the Slave is not matched or is open, the Master may fail to train the reflection signal canceller at this time, which will lead to the entire training process. fail

[0004] In the prior art, line connection detection requires the use of additional signal transmission circuits and control circuits to transmit dedicated line matching detection signals, which may cause compatibility problems. For example, the slave side may misjudge the line matching detection signal as a training sequence This leads to training failure. In addition, the additional signal transmission circuit and control circuit increase the cost of implementation, so there is an urgent need for a line connection detection method that does not cause compatibility problems.

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