Title :
Fading channels: how perfect need “perfect side information” be?
Author :
Lapidoth, Amos ; Shamai, Shlomo
Author_Institution :
Inst. for Signal & Inf. Process., Swiss Fed. Inst. of Technol., Zurich, Switzerland
Abstract :
The analysis of fading channels is often done under the assumption that the additive noise is white and Gaussian, and that the receiver has precise knowledge of the realization of the fading process. These assumptions imply the optimality of Gaussian codebooks and of a modified nearest-neighbor decoding rule. Here we study the robustness of this communication scheme with respect to errors in the estimation of the fading process. We quantify the degradation in performance that results from estimation errors, and demonstrate the lack of robustness of this scheme. We treat the “flat fading” case exclusively
Keywords :
AWGN channels; channel coding; decoding; error analysis; estimation theory; fading channels; receivers; Gaussian codebooks; additive white Gaussian noise channels; communication scheme; estimation errors; flat fading channels; modified nearest-neighbor decoding rule; performance; receiver; robustness; Additive noise; Block codes; Degradation; Delay; Estimation error; Fading; Information analysis; Maximum likelihood decoding; Noise robustness; Phase estimation;
Conference_Titel :
Information Theory and Communications Workshop, 1999. Proceedings of the 1999 IEEE
Conference_Location :
Kruger National Park
Print_ISBN :
0-7803-5268-8
DOI :
10.1109/ITCOM.1999.781400