Title :
Non-ideal adaptive modulation: bounded signaling information and imperfect adaptation
Author :
Paris, José F. ; Aguayo-Torres, M. Carmen ; Entrambasaguas, José T.
Author_Institution :
Dept. of Ingenieria de Comunicaciones, Malaga Univ., Spain
fDate :
29 Nov.-3 Dec. 2004
Abstract :
The impact of non-ideal adaptive modulation for Nakagami-m flat fading channels is studied. First, the consequences of bounded feedback information rate, not feasible with continuous power or rate variation, are tackled. An optimum fully-discrete AQAM scheme is derived and the signaling information rate is evaluated. Later, degradation due to noisy and delayed pilot symbol assisted channel estimation is analyzed and compared to that of continuous schemes.
Keywords :
adaptive modulation; channel estimation; delays; fading channels; feedback; quadrature amplitude modulation; random noise; telecommunication signalling; Nakagami-m fading channels; Nakagami-m flat fading channels; bounded feedback information rate; bounded signaling information; continuous power variation; continuous rate variation; fully-discrete adaptive QAM scheme; imperfect adaptation; nonideal adaptive modulation; pilot symbol assisted channel estimation; Bit error rate; Channel estimation; Degradation; Delay estimation; Fading; Feedback; Information rates; Quadrature amplitude modulation; Signal to noise ratio; Transmitters;
Conference_Titel :
Global Telecommunications Conference, 2004. GLOBECOM '04. IEEE
Print_ISBN :
0-7803-8794-5
DOI :
10.1109/GLOCOM.2004.1379085
