Publication No 35067

Author(s)

Necker, M.C.; Sanzi, F.; Speidel, J.

Title

An adaptive Wiener-Filter for improved channel estimation in mobile OFDM-systems

Keywords

OFDM; MOBILE COMMUNICATION; FILTER THEORY; CHANNEL

Abstract

In this paper we propose an improved channel estimator for a pilot based, mobile OFDM-system by adaptive Wiener-filtering in the frequency direction. In order to achieve a better estimation, the conventional fixedWiener-Filter is replaced by an adaptive filter which adapts to the actual channel characteristic. The primary effect is a bandwidth reduction which minimizes the impact of noise onto the channel estimate. We have computed the BER and achieved a gain in Eb/N0 of up to 2dB, compared to a fixed Wiener-Filter. Various simulations show the good results for different channels at high Doppler frequencies.

Year

2001

Reference entry

Necker, M.C.; Sanzi, F.; Speidel, J.
An adaptive Wiener-Filter for improved channel estimation in mobile OFDM-systems
Proceedings of the IEEE International Symposium on Signal Processing and Information Technology (ISSPIT 2001), Kairo, December 2001, pp. 213-216

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