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

Volume

6

fYear

2004

fDate

29 Nov.-3 Dec. 2004

Firstpage

3828

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Global Telecommunications Conference, 2004. GLOBECOM '04. IEEE

Print_ISBN

0-7803-8794-5

Type

conf

DOI

10.1109/GLOCOM.2004.1379085

Filename

1379085