Patent ID: 8098749
Filing Date: 2012-01-17
Classification: H04L

Abstract:
1. A channel frequency response (CFR) estimation method for a multi-band orthogonal frequency division multiplexing (OFDM)-based ultra-wideband (UWB) system to achieve a CFR estimation, ĥ r =[ĥ r (0),ĥ r (1), . . . , ĥ r (N−1)] T , on an rth sub-band, N indicating the number of subcarriers employed by one OFDM symbol, the superscript T denoting transpose, comprising: receiving an OFDM-UWB frame in an OFDM-UWB receiver of the multi-band OFDM-based UWB system; obtaining, by the OFDM-UWB receiver, a first CFR estimation ĥ obtaining a second CFR estimation ĥ obtaining, from the received OFDM-UWB frame, a frame header containing a plurality of OFDM symbols, each OFDM symbol being transmitted with frequency-domain spreading, and being divided into N transmitted signals for modulating corresponding subcarriers; for each OFDM symbol, detecting signs of the N transmitted signals using two frequency-domain spread signals corresponding to each of the N transmitted signals and the second CFR estimation ĥ obtaining a third CFR estimation ĥ obtaining a fourth CFR estimation ĥ obtaining the CFR estimation ĥ