Method for measuring received signal quality in a mobile wireless communication system

摘要

A received signal processing circuit for a receiver in a digital communication system uses a re-encode and compare scheme to measure received signal quality. The received signal is demodulated and decoded to produce an estimate of the original information bit sequence. The estimate of the information bit sequence is re-encoded using the same channel code as the transmitter. The re-encoded bits are compared to the demodulated bits output from the demodulator to yield an initial estimate of the channel bit error rate caused by the communication channel. Bias in th4e initial estimate of the channel bit error rate is removed to produce a refined estimate of the channel bit error rate.