Joint SNR Target and Rate Adaptation Based on Bit Error Rate Estimation

Author

Ong, Lay Teen ; Olfat, Ali ; Shikh-Bahaei, Mohammed

Author_Institution

Centre of Digital Signal Process., Cardiff Univ.

fYear

2005

fDate

7-7 Sept. 2005

Firstpage

470

Lastpage

474

Abstract

We derive the joint optimisation of signal-to-noise (SNR) target and rate adaptation for maximum spectral efficiency based on a bit error rate (BER) estimate. We consider a code division multiple access (CDMA)-based system with two levels of power control: channel inversion or truncated channel inversion is used for the fast inner-loop power control, and SNR target setting in the outer-loop is performed jointly with transmit rate adaptation based on the estimate of BER. We use the joint distribution of the channel gain and its estimate to obtain maximum likelihood estimation of the BER. We show that our proposed scheme achieves higher spectral efficiency when compared to an adaptive rate and power scheme with fixed SNR target

Keywords

Rayleigh channels; code division multiple access; error statistics; maximum likelihood estimation; power control; telecommunication control; BER; CDMA-based system; bit error rate estimation; channel inversion; code division multiple access; inner-loop power control; maximum likelihood estimation; maximum spectral efficiency; power control; rate adaptation; signal-to-noise target; AWGN; Additive white noise; Bit error rate; Error analysis; Estimation error; Fading; Power control; Power system modeling; Signal to noise ratio; Transmitters;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Communication Systems, 2005. 2nd International Symposium on

Conference_Location

Siena

Print_ISBN

0-7803-9206-X

Type

conf

DOI

10.1109/ISWCS.2005.1547745

Filename

1547745