Patent ID: 7295517
Filing Date: 2007-11-13
Classification: H04L

Abstract:
1. A baseband processor for processing a plurality of baseband sample signals derived by demodulating data transmitted in the form of a packet sent over a data channel during a packet transmission in a multicarrier Orthogonal Frequency Division Multiplexing (OFDM) communication system having a plurality of subchannels, wherein each packet includes a preamble, a header, and a data payload, comprising: an analog-to-digital converter to convert the baseband sample signal into a digital baseband sample signal wherein the preamble includes a plurality of subchannel symbols; an energy measure/gain set module coupled to a variable gain unit for providing a variable gain control setting V a preamble processing module coupled to the analog-to-digital converter to receive the digital baseband sample signal, the preamble processing module including a sub-channel gain estimation module coupled to receive the digital baseband sample signal to estimate the gain estimation (h a channel quality estimation module that generates a channel quality estimation metric (M) that is equivalent to the normalized geometric mean of the squared magnitudes of the gain estimation (h where s d is the number of sub-channels having data.