Channel estimation and compensation for preamble-assisted DAPSK transmission in digital mobile radio system

Author

Liu, Der-Zheng ; Wei, Che-Ho

Author_Institution

Dept. of Electron. Eng., Nat. Chiao Tung Univ., Hsinchu, Taiwan

Volume

50

Issue

2

fYear

2001

fDate

3/1/2001 12:00:00 AM

Firstpage

546

Lastpage

556

Abstract

This paper presents a novel channel estimation and compensation technique, combining fading estimation and frequency offset estimation, for preamble-assisted differentially encoded amplitude- and phase-shift keying (DAPSK) transmission in a digital mobile radio system. The received preamble symbols are used to estimate the combined distortions caused by multipath fading and frequency offset. The detected data symbols as well as preamble symbols are used to enhance the accuracy of the estimation process. The combined distortions can be compensated in the data symbols at the same time. The storage-delay time of the estimation process is only several symbols long. A series of computer simulations have been carried out to investigate the bit error rate performance of the preamble-assisted 16-DAPSK signals with uncertain frequency offset in the frequency-nonselective and frequency-selective Rayleigh fading channels

Keywords

Rayleigh channels; amplitude shift keying; delays; differential phase shift keying; digital radio; error statistics; frequency estimation; land mobile radio; modulation coding; multipath channels; BER performance; bit error rate performance; channel compensation; channel estimation; computer simulations; data symbols; detected data symbols; differentially encoded amplitude-shift keying; differentially encoded phase-shift keying; digital mobile radio system; distortions; fading estimation; frequency offset estimation; frequency-nonselective Rayleigh fading channels; frequency-selective Rayleigh fading channels; multipath fading; preamble symbols; preamble-assisted 16-DAPSK signals; preamble-assisted DAPSK transmission; received preamble symbols; storage-delay time; Amplitude estimation; Bit error rate; Channel estimation; Fading; Frequency estimation; Land mobile radio; Phase detection; Phase estimation; Phase shift keying; Quadrature amplitude modulation;

fLanguage

English

Journal_Title

Vehicular Technology, IEEE Transactions on

Publisher

ieee

ISSN

0018-9545

Type

jour

DOI

10.1109/25.923066

Filename

923066