Two Low-complexity Techniques to Improve Equalizer Performance in Wireless Burst Data Communications

G. Wang and K. Dombrowski (Germany)


Equalization, Timing Recovery, Tap Weight Initialization


This paper proposes two low-complexity techniques to improve the performance of the decision feedback equalizers (DFE) used in wireless indoor burst data communications. Based on the channel impulse response (CIR) estimate, the first technique provides a very low complexity scheme to estimate the burst timing. Aided by the estimated burst timing and CIR, the second technique is proposed to accurately initialize the DFE reference tap weight. Simulation results show that the proposed burst timing estimation scheme degrades the frame error rate (FER) by at most a factor of 2.3 compared to the complex exhaustive search method [1]. In contrast to the conventional scheme, the proposed reference tap weight initialization technique improves the average FER by more than 10 times when the DFE input signal-to-noise ratio (SNR) is between 20 and 30 dB.

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