Optimum frequency-domain partial response encoding in OFDM system

Author

Zhang, Hua ; Li, Ye

Author_Institution

Sch. of Electr. & Comput. Eng., Georgia Inst. of Technol., Atlanta, GA, USA

Volume

3

fYear

2003

fDate

11-15 May 2003

Firstpage

2025

Abstract

Time-variance of wireless channels destroys the orthogonality among subchannels in OFDM system and causes the inter-channel interference (ICI), which results in an error floor. In this paper, we study frequency-domain partial response coding (PRC) for reducing the effect of the ICI. Based on the general expression of the ICI power for OFDM with PRC, the optimum weights for PRC that minimize the ICI power are derived. From numerical and simulation results, optimum PRC for OFDM can reduce the ICI effectively by 4.0 dB for 2-tap PRC and 6.2 dB for 3-tap PRC, respectively.

Keywords

OFDM modulation; adjacent channel interference; frequency-domain analysis; interference suppression; minimisation; partial response channels; Doppler frequency shift; OFDM system; carrier frequency offset; frequency-domain partial response encoding; interchannel interference; orthogonal frequency division multiplexing; power minimization; Bandwidth; Detectors; Digital video broadcasting; Encoding; Interchannel interference; Numerical simulation; OFDM modulation; Partial response channels; Time domain analysis; Transmitters;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications, 2003. ICC '03. IEEE International Conference on

Print_ISBN

0-7803-7802-4

Type

conf

DOI

10.1109/ICC.2003.1203958

Filename

1203958