Title :
Wideband burst-by-burst adaptive modulation with turbo equalization and iterative channel estimation
Author :
Wong, C.H. ; Yeap, B.L. ; Hanzo, L.
Author_Institution :
Dept. of Electron. & Comput. Sci., Southampton Univ., UK
Abstract :
The performance of adaptive modulation-applied in conjunction with turbo equalization (TE)-is characterized in a noise limited environment over a slowly varying wideband multi-path Rayleigh fading channel. The iterative structure of the turbo equalizer was also exploited in order to invoke an iterative least mean square (LMS) channel estimator. Finally, the throughput performance of the adaptive modulation scheme was compared to that of its constituent modulation modes, where a gain of 1.5 dB to 1.7 dB was recorded
Keywords :
Rayleigh channels; adaptive modulation; equalisers; error statistics; iterative methods; least mean squares methods; modulation coding; multipath channels; parameter estimation; quadrature amplitude modulation; turbo codes; 16QAM; 4QAM; AQAM; BER; ISI; Rayleigh fading channel; adaptive quadrature amplitude modulation; channel impulse response; coded BPSK; gain; intersymbol interference; iterative LMS channel estimator; iterative channel estimation; iterative structure; least mean square channel estimator; modulation mode switching; noise limited environment; slowly varying wideband multipath fading; throughput performance; turbo equalization; wideband burst-by-burst adaptive modulation; Adaptive equalizers; Bit error rate; Channel estimation; Convolution; Convolutional codes; Intersymbol interference; Iterative decoding; Quadrature amplitude modulation; Wideband; Working environment noise;
Conference_Titel :
Vehicular Technology Conference Proceedings, 2000. VTC 2000-Spring Tokyo. 2000 IEEE 51st
Conference_Location :
Tokyo
Print_ISBN :
0-7803-5718-3
DOI :
10.1109/VETECS.2000.851631
