Maximum likelihood tracking algorithms for MIMO-OFDM

Author

Oberli, Christian ; Daneshrad, Babak

Author_Institution

Dept. of Electr. Eng., California Univ., Los Angeles, CA, USA

Volume

4

fYear

2004

fDate

20-24 June 2004

Firstpage

2468

Abstract

Tracking algorithms for carrier and sampling clock frequency offset are proposed for pilot assisted MIMO-OFDM in frequency selective channels. The methods are based on maximum likelihood estimation theory applied to observations of received pilot subcarriers at the output of the FFTs of the receiver. Simulation results show that larger MIMO configurations benefit from lower estimator variances, providing increased synchronization accuracy at low SNRs, or allowing for a reduction of the number of pilot subcarriers.

Keywords

MIMO systems; OFDM modulation; fast Fourier transforms; maximum likelihood estimation; radio receivers; synchronisation; telecommunication channels; tracking; FFT; MIMO-OFDM; SNR; fast Fourier transform; frequency selective channels; maximum likelihood tracking algorithms; multiple-input multiple-output; orthogonal frequency division multiplexing; pilot subcarrier; receiver; sampling clock frequency offset; Flexible printed circuits; Frequency estimation; Frequency synchronization; MIMO; Maximum likelihood estimation; OFDM; Oscillators; Throughput; Timing; Transmitters;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications, 2004 IEEE International Conference on

Print_ISBN

0-7803-8533-0

Type

conf

DOI

10.1109/ICC.2004.1312962

Filename

1312962