Title :
Approximate best linear unbiased channel estimation for frequency selective multipath channels with long delay spreads
Author :
Özen, Serdar ; Pladdy, Christopher ; Fimoff, Mark J. ; Nerayanuru, S.M. ; Zoltowski, Michael D.
Author_Institution :
Res. & Dev., Zenith Electron. Corp., Lincolnshire, IL, USA
Abstract :
We provide an iterative and a non-iterative channel impulse response (CIR) estimation algorithm for communication systems which utilize a periodically transmitted training sequence within a continuous stream of information symbols. The iterative procedure calculates the (semi-blind) best linear unbiased estimate (BLUE) of the CIR. The non-iterative version is an approximation to the BLUE CIR estimate, achieving almost similar performance, with much lower complexity. We first provide a formulation of the received data and correlation processing with the adjacent symbol correlation taken into account, and we then present the connections of the correlation based CIR estimation scheme to the ordinary least squares CIR estimation, and the BLUE CIR estimation. Simulation results are provided to demonstrate the performance of the novel algorithms for 8-VSB ATSC digital TV systems.
Keywords :
channel estimation; correlation methods; delays; digital television; iterative methods; least squares approximations; multipath channels; BLUE CIR estimate; adjacent symbol correlation; best linear unbiased channel estimation; correlation processing; delay spreads; frequency selective multipath channels; iterative channel impulse response estimation algorithm; noniterative channel impulse response estimation algorithm; Additive noise; Channel estimation; Delay estimation; Digital TV; Frequency estimation; Iterative algorithms; Least squares approximation; Linear approximation; Multipath channels; Vectors;
Conference_Titel :
Signals, Systems and Computers, 2004. Conference Record of the Thirty-Seventh Asilomar Conference on
Print_ISBN :
0-7803-8104-1
DOI :
10.1109/ACSSC.2003.1292099
