Optimal power adaptation for OFDM systems with ideal bit-interleaving and hard-decision decoding

Author

Hunziker, Thomas ; Dahlhaus, Dirk

Author_Institution

Adv. Telecommun. Res. Inst. Int., Kyoto, Japan

Volume

5

fYear

2003

fDate

11-15 May 2003

Firstpage

3392

Abstract

We derive power adaptation strategies optimizing the error rates of broadband bit-interleaved coded OFDM systems performing hard-decisions after the demodulation and ideal interleaving. The adaptive subchannel power allocation is based on either perfect or outdated channel state information in a time-division duplex transmission. We find that for an average bit error rate level of 10^-6 a gain of up to 4 dB can be achieved by the proposed adaptation in Rayleigh fading channels.

Keywords

OFDM modulation; Rayleigh channels; channel allocation; decoding; demodulation; error statistics; interleaved codes; optimisation; time division multiplexing; 4 dB; BER; OFDM systems; Rayleigh fading channels; adaptive subchannel power allocation; bit error rate; broadband bit-interleaved code; demodulation; error rates optimization; hard-decision decoding; ideal bit-interleaving; ideal interleaving; optimal power adaptation; orthogonal frequency division multiplexing; outdated channel state information; time-division duplex transmission; Bit error rate; Channel state information; Communications technology; Decoding; Demodulation; Error analysis; Fading; Interleaved codes; Modulation coding; OFDM;

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.2003.1204084

Filename

1204084