Patent ID: 7580467

Claim:
An apparatus for characterizing a frequency response of a transmission channel between a transceiver and a subscriber unit, the apparatus comprising: means for receiving a signal transmitted once per predetermined interval of time, the signal comprising multiple carriers, a plurality of the carriers comprising training symbols, a plurality of the carriers comprising information symbols; means for generating frequency response estimates at the frequencies of the carriers comprising training symbols each interval of time; means for converting the frequency response estimates into a time domain response to generate an impulse response once per interval of time; means for filtering the impulse responses over a plurality of intervals of time to generate a power delay profile comprising an average power gain of the channel as a function of time; means for determining the channel profile from the filtered impulse responses; means for converting the channel profile to the frequency domain to generate a channel interpolator; and means for generating the characterized frequency response from the channel interpolator and the frequency response estimates.