Patent ID: 7843806
Filing Date: 2010-11-30
Classification: H04L

Abstract:
1. An apparatus for sampling clock recovery for a multi-band orthogonal frequency division multiplexing (OFDM)-based ultra-wideband (UWB) system comprising: a symbol timing adjustment module for receiving transmitted OFDM symbols and shifting forward or backward symbol timing of the transmitted OFDM symbols; a discrete Fourier transform (DFT) processor for performing DFT on an output from the symbol timing adjustment module; a channel estimator for undertaking a channel frequency response (CFR) estimation based on the transmitted OFDM symbols of a channel estimation sequence from an output of the DFT processor; a sampling clock offset (SCO) phase rotator for receiving and performing a phase shift on the transmitted OFDM symbols of a frame header and a frame payload from the output of the DFT processor; an SCO estimation stage for undertaking an SCO estimation based on a pilot-subcarrier-related output of the SCO phase rotator and the CFR estimation from the channel estimator; and an SCO compensation distributor for dividing the SCO estimation into integer and fractional portions and then distributing them into the symbol timing adjustment module and the SCO phase rotator, respectively.