Trellis-coded OFDM signal detection with maximal ratio combining and combined equalization and trellis decoding

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We propose an improved orthogonal frequency division multiplexing (OFDM) signal detector which uses the minimum mean-square error (MMSE) noise feedback equalization (NFE). The input bit stream is trellis-coded to form OFDM signal blocks and the maximal ratio combining (MRC) is adopted at the receiver in order to improve the performance of the detector. As a result, we obtain significantly improved detection performance compared with the conventional OFDM receivers as follows. Using the proposed MMSE-NFE in the receiver, we can obtain the performance gain of about 1.5 dB to 2 dB in symbol energy to noise power spectral density (E-s/N-O) for Doppler frequencies of f(d) = 20 and 100 Hz, respectively over the receiver with the MMSE linear equalization (LE) alone at symbol error rate (SER) of about 10(-3). With MRC and trellis coding, the performance gain of about 11 dB in E-s/N-O for f(d) = 20 and 100 Hz at SER of about 10(-3) is obtained.
Publisher
IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG
Issue Date
1997-04
Language
English
Article Type
Letter
Citation

IEICE TRANSACTIONS ON COMMUNICATIONS, v.E80B, no.4, pp.632 - 638

ISSN
0916-8516
URI
http://hdl.handle.net/10203/76833
Appears in Collection
EE-Journal Papers(저널논문)
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