Pilot assisted channel estimation for OFDM in mobile cellular systems

Author

Tufvesson, Fredrik ; Maseng, Torleiv

Author_Institution

Dept. of Appl. Electron., Lund Univ., Sweden

Volume

3

fYear

1997

fDate

4-7 May 1997

Firstpage

1639

Abstract

The use of pilot symbols for channel estimation introduces overhead and it is thus desirable to keep the number of pilot symbols to a minimum. The number of needed pilot symbols for a desired bit error rate and Doppler frequency is highly dependent on the pilot pattern used in orthogonal frequency division multiplexed, OFDM, systems. Five different pilot patterns are analysed by means of resulting bit error rate, which is derived from channel statistics. Rearrangement of the pilot pattern enables a reduction in the number of needed pilot symbols up to a factor 10, still retaining the same performance. The analysis is general and can be used for performance analysis and design of pilot patterns for any OFDM system

Keywords

Doppler effect; cellular radio; coding errors; error statistics; frequency division multiplexing; multipath channels; parameter estimation; quadrature phase shift keying; Doppler frequency; OFDM; QPSK; bit error rate; channel statistics; mobile cellular systems; multipath distortion; orthogonal frequency division multiplexing; overhead; performance analysis; pilot assisted channel estimation; pilot patterns design; Bandwidth; Bit error rate; Broadcasting; Channel estimation; Mobile communication; Narrowband; OFDM; Pattern analysis; Time measurement; Transmitters;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 1997, IEEE 47th

Conference_Location

Phoenix, AZ

ISSN

1090-3038

Print_ISBN

0-7803-3659-3

Type

conf

DOI

10.1109/VETEC.1997.605836

Filename

605836