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Two-Stage Channel Estimation using LS Approach for MB-OFDM UWB System

Author(s):

Manasa Mohan , Mount Zion College of Engineering; Shahana Habeeb Mohammed, Mount Zion College of Engineering; Hari S, Mount Zion College of Engineering

Keywords:

Channel Estimation, MB-OFDM, UWB systems, Hannan-Quinn Criteria, LS approach

Abstract

In this paper a two-stage channel estimation technique for high rate ultra-wideband communication system is proposed. In the preamble-stage, channel estimation is done using least square approach followed by frequency-domain smoothing operation. Channel estimated at this stage is then windowed by a rectangular window whose length is optimized by the Hannan–Quinn criteria. The channel estimated from the previous stage is further refined by applying time- and frequency-redundancy in a decision-directed manner followed by smoothing and windowing. Link level simulation shows that the two-stage method with fixed window size provides a good estimation performance close to that of the minimum-mean-square-estimation (MMSE) scheme with significant reduction in computational cost.

Other Details

Paper ID: IJSRDV5I11015
Published in: Volume : 5, Issue : 1
Publication Date: 01/04/2017
Page(s): 1710-1712

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