Method and apparatus for adjusting a symbol decision threshold at a receiver in a communication network

摘要

A method and apparatus for adjusting a symbol decision threshold at a receiver in a communication network enables the receiver to be adapted to more correctly receive symbols as transmitted by a transmitter. In one embodiment, a received bit imbalance is detected by a receiver prior to error correction and after error correction to determine whether an error component of the received signal contains larger numbers of ones or larger numbers of zeros. Where the transmitter scrambles the signal prior to transmission, the receiver will also scramble the signal after error correction and prior to counting the number of zeros or ones. Any imbalance between the number of transmitted and received ones or zeros is used as feedback to adjust threshold values used by detectors to fine tune the manner in which the receiver interprets incoming signals.

主权项

1. A method of adjusting a symbol decision threshold at a receiver in a communication network, the method comprising the steps of:
receiving a signal by the receiver, the signal containing a data component and an error component; counting a number of ones or zeros of the received signal containing the data component and the error component; error correcting the received signal to remove the error component from the signal to isolate the data component; counting a number of ones or zeros in the data component; comparing the number of ones or zeros in the data component with the number of ones or zeros of the received signal to determine the number of ones or zeros in the error component; and utilizing the determined number of ones or zeros of the error component to adjust a symbol decision threshold at the receiver.