A coded OFDM system for time-varying multipath Rayleigh fading environment

Author

Kim, Yun Hee ; Kim, Hong Gil ; Song, Iickho ; Lee, Min Joon ; Yoon, Seok Ho

Author_Institution

Dept. of Electr. Eng., Korea Adv. Inst. of Sci. & Technol., Daejeon, South Korea

Volume

2

fYear

1997

fDate

2-5 Nov 1997

Firstpage

867

Abstract

An OFDM system is considered as an effective technique in high data rate transmission under multipath fading channels. In this paper, we analyze the influence of interference due to the time variation and delay spread of mobile radio channels on an OFDM system. We obtain the bit error rate (BER) performance of the 16-QAM OFDM system. Then, we investigate the performance of the Reed-Solomon (RS) coded 16-QAM OFDM system when the number of sub-carriers varies. In the investigation, we assume that the information transmission rate and total bandwidth expansion (due to coding, guard interval, and number of sub-carriers) are fixed. Under this condition, it is observed that there are optimum numbers of sub-carriers that minimize the post decoding symbol error probability of the RS code for various channel states

Keywords

Rayleigh channels; Reed-Solomon codes; channel coding; error statistics; fading; frequency division multiplexing; land mobile radio; modulation coding; multipath channels; quadrature amplitude modulation; radiofrequency interference; subcarrier multiplexing; time-varying channels; 16-QAM OFDM system; Reed-Solomon coded 16-QAM OFDM system; bit error rate performance; channel states; coded OFDM system; delay spread; guard interval; high data rate transmission; information transmission rate; interference; mobile radio channels; post decoding symbol error probability; sub-carriers; time variation; time-varying multipath Rayleigh fading environment; total bandwidth expansion; Bandwidth; Bit error rate; Delay effects; Fading; Interference; Land mobile radio; OFDM; Rayleigh channels; Reed-Solomon codes; Time varying systems;

fLanguage

English

Publisher

ieee

Conference_Titel

MILCOM 97 Proceedings

Conference_Location

Monterey, CA

Print_ISBN

0-7803-4249-6

Type

conf

DOI

10.1109/MILCOM.1997.646743

Filename

646743