Title :
On the CRLB and Low-Complexity Channel Estimation for UWB Communications
Author :
Wang, Xiaoli ; Ge, Hongya
Author_Institution :
New Jersey Inst. of Technol., Newark
Abstract :
The Cramer-Rao lower bound (CRLB) is derived for the channel estimation of direct sequence-code division multiple access ultra-wideband (DS-CDMA UWB) communication system. We have modified the channel model and reduced the number of estimation parameters. Furthermore, a low-complexity data-aided Least Square (LS) channel estimation algorithm is proposed for the modified model. In addition, the problem of designing orthogonal training sequence is discussed. Finally, numerical examples are provided to evaluate both the derived CRLB and the proposed channel estimation algorithm.
Keywords :
channel estimation; code division multiple access; communication complexity; least squares approximations; sequences; spread spectrum communication; ultra wideband communication; Cramer-Rao lower bound; UWB communication; direct sequence-code division multiple access communication system; low-complexity data-aided least square channel estimation algorithm; orthogonal training sequence design problem; AWGN; Additive white noise; Channel estimation; Gaussian noise; Maximum likelihood estimation; Multiaccess communication; Multiple access interference; Pulse modulation; Ultra wideband communication; Ultra wideband technology;
Conference_Titel :
Information Sciences and Systems, 2007. CISS '07. 41st Annual Conference on
Conference_Location :
Baltimore, MD
Print_ISBN :
1-4244-1063-3
Electronic_ISBN :
1-4244-1037-1
DOI :
10.1109/CISS.2007.4298290
