Patent ID: 8446996
Filing Date: 2013-05-21
Classification: H04L

Abstract:
1. A sampling resolution controller for an analog to digital converter in a receiver coupled to an analog signal source, the analog signal source comprising a preamble followed by a plurality of OFDM symbols from a first set of subcarrier frequencies associated with a first zone and a second set of subcarrier frequencies associated with a second zone, said analog to digital converter coupled to a baseband processor, the baseband processor distinguishing said preamble interval and each said OFDM symbol interval, said baseband processor also distinguishing said first set of subcarrier frequencies associated with said first zone from said second set of subcarrier frequencies associated with said second zone in said OFDM symbols by examination of the subcarriers therein; said sampling resolution controller having a higher than nominal sampling resolution during a symbol which has said second set of subcarriers, and said nominal sampling resolution at other times; where at least one of said OFDM symbols contains either a subset of said first set of subcarrier frequencies, a subset of said second set of subcarrier frequencies, or a mixture of subsets of said first set of subcarrier frequencies and said second set of subcarrier frequencies, for which a gain control value is determined at the end of the current symbol for use in a subsequently received symbol.