DocumentCode :
3252203
Title :
Rate and Power Adaptation Over Slow Fading Channels With Noisy Quantized Feedback
Author :
Ekbatani, Siavash ; Etemadi, Farzad ; Jafarkhani, Hamid
Author_Institution :
Univ. of California, Irvine
fYear :
2007
fDate :
4-7 Nov. 2007
Firstpage :
1951
Lastpage :
1955
Abstract :
The objective of this work is to maximize the expected transmission rate over slow fading channels when quantized channel feedback is available for rate and power control. This problem has been recently studied in the literature assuming noiseless feedback. We consider a more realistic model, where the feedback indices are subject errors that are hardly avoidable in a wireless environment. Our scheme considers a binary symmetric channel (BSC) model for every feedback bit. A channel optimized scaler quantizer (COSQ) is designed to utilize noisy feedback in our system. The impact of noisy quantized feedback is studied when multi-layer coding is employed to combat the uncertainty about the channel state information (CSI) at the transmitter. We also study temporal power adaptation in this system. We show that a noisy feedback system based on COSQ design never performs worse than a no-feedback system and its performance approaches a noiseless feedback scenario as the feedback link quality improves.
Keywords :
fading channels; feedback; probability; quantisation (signal); binary symmetric channel model; channel optimized scaler quantizer; channel state information; feedback bit; feedback link quality; multilayer coding; noiseless feedback scenario; noisy quantized feedback; outage probability; power adaptation; power control; quantized channel feedback; rate adaptation; rate control; slow fading channels; transmission rate; wireless environment; Channel state information; Design optimization; Fading; Power control; Power system modeling; Quantization; State feedback; Transmitters; Uncertainty; Working environment noise; Outage probability; channel optimized scalar quantizers; multi-layer coding; temporal power control;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Signals, Systems and Computers, 2007. ACSSC 2007. Conference Record of the Forty-First Asilomar Conference on
Conference_Location :
Pacific Grove, CA
ISSN :
1058-6393
Print_ISBN :
978-1-4244-2109-1
Electronic_ISBN :
1058-6393
Type :
conf
DOI :
10.1109/ACSSC.2007.4487577
Filename :
4487577
Link To Document :
بازگشت