Title :
Power control in feedback communications over a fading channel with a time delay
Author_Institution :
Centre for Wireless Commun., Oulu Univ., Finland
Abstract :
The pilot symbol system with feedback MMSE power control over a slowly Rayleigh fading channel was previously considered in the literature. A feedback link was noiseless and delayless, and an MMSE predictor was used to estimate the channel state in both power control and detection. In this paper the feedback is noiseless and an MMSE smoother is used in detection. The effects of more accurate channel state estimates in detection and an unavoidable feedback delay on the system performance are derived
Keywords :
Rayleigh channels; delays; feedback; least mean squares methods; modulation; power control; prediction theory; radiocommunication; signal detection; smoothing methods; state estimation; telecommunication control; MMSE predictor; MMSE smoother; Rayleigh fading channel; channel state estimation; delayless feedback link; feedback MMSE power control; feedback communications; feedback delay; noiseless feedback link; pilot symbol assisted modulation system; pilot symbol system; signal detection; system performance; time delay; Delay effects; Delay estimation; Delay systems; Error probability; Fading; Feedback communications; Power control; State estimation; State feedback; System performance;
Conference_Titel :
Communications, 2001. ICC 2001. IEEE International Conference on
Conference_Location :
Helsinki
Print_ISBN :
0-7803-7097-1
DOI :
10.1109/ICC.2001.936610
