Channel interpolation and MMSE multi-input multi-output frequency-domain DFE for wireless data communications using OFDM

Author

Lee, Yumin ; Huang, Pinchieh

Author_Institution

Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan

Volume

1

fYear

2002

fDate

2002

Firstpage

207

Lastpage

211

Abstract

The cyclic prefix (CP) is typically employed in conventional orthogonal frequency division multiplex (OFDM) transmission systems. The CP, however, consumes bandwidth and power, and is undesirable for applications such as wireless communications. We propose an MMSE multi-input multi-output frequency domain decision-feedback equalizer (MIMO FDDFE). A novel channel interpolation algorithm is also proposed. Simulation results show that, with the proposed algorithm, an OFDM system without CP actually outperforms a conventional OFDM system with CP in both bit error rate (BER) and bandwidth efficiency

Keywords

MIMO systems; OFDM modulation; data communication; decision feedback equalisers; discrete Fourier transforms; error statistics; interpolation; least mean squares methods; radio access networks; radio receivers; signal processing; wireless LAN; BER; DFE; MIMO; MMSE; OFDM; bandwidth efficiency; bit error rate; channel interpolation; cyclic prefix; decision-feedback equalizer; frequency-domain; inverse DFT; inverse discrete Fourier transform; multi-input multi-output; orthogonal frequency division multiplexing; receiver signal processing; wireless data communications; Bandwidth; Bit error rate; Decision feedback equalizers; Discrete Fourier transforms; Frequency estimation; Interpolation; MIMO; OFDM; Signal processing algorithms; Wireless communication;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications, 2002. ICC 2002. IEEE International Conference on

Conference_Location

New York, NY

Print_ISBN

0-7803-7400-2

Type

conf

DOI

10.1109/ICC.2002.996846

Filename

996846