Method and apparatus for channel quality metric generation within a packet-based multicarrier modulation communication system

摘要

A communication system disclosed herein includes a channel quality estimation module that determines the channel quality metric utilizing the preamble portion of the packet only. Data, in such a communication system, is transmitted in the form of a packet over a data channel during a packet transmission, wherein each data channel includes several subchannels. The system includes a receiver having at least a baseband processor. The baseband processor couples to receive each baseband sample signal. Specifically, the baseband processor calculates the gain estimation of the each subchannel and generates a channel quality metric for each subchannel that is derived by deinterleaving the sequence of gain estimation magnitudes, convolving the deinterleaved sequence of gain estimation magnitudes with a short window index, and detecting the number of times the convolution falls beneath a predetermined threshold.