LIU Liang, ZHOU Jun, YE Fan, et al. Estimation and compensation of nonideal front-end effects for MB-OFDM based ultra wideband system[J]. 2009, 30(10): 1-7.
LIU Liang, ZHOU Jun, YE Fan, et al. Estimation and compensation of nonideal front-end effects for MB-OFDM based ultra wideband system[J]. 2009, 30(10): 1-7.DOI:
Three types of wireless system frontend imperfections
namely carrier frequency offset (CFO)
sampling frequency offset (SFO) and in-phase/quadrature-phase (I/Q) imbalance were addressed. A time-domain CFO and I/Q imbalance estimation and compensation scheme for MB-OFDM based ultra-wideband (UWB) system was proposed. In the scheme
a data-aided CFO estimation algorithm
which was robust to large I/Q imbalance
was presented. Also
a time-domain I/Q imbalance estimation algorithm was introduced. Finally a two-step joint CFO and I/Q imbalance compensation scheme was developed. In frequency domain
a residual CFO and SFO estimation algorithm using the time-domain spreading feature of the UWB frame header was presented. The proposed scheme is competent for large front-end imperfections