Performance of a precoded high speed wireless communication system over time-varying indoor channels

Author

Badra, Renny E. ; Daneshrad, Babak

Author_Institution

Dept. of Electr. Eng., California Univ., Los Angeles, CA, USA

Volume

4

fYear

1998

fDate

1998

Firstpage

1900

Abstract

A detailed and realistic time-varying channel model is used in the simulation of a 20-Mbps indoor wireless communication system that uses a DFE on the reverse link and a Tomlinson-Harashima (1971, 1972) precoder on the forward link to mitigate ISI. The motivation of such an asymmetric scheme is to minimize the hardware complexity of the portable unit. Results confirm the viability of this system by quantifying the performance of the forward link as a function of time, portable speed, channel delay spread, transmission distance and training duration. Additionally, a simple and effective scheme for receiver AGC at the portable is proposed and evaluated

Keywords

automatic gain control; channel coding; decision feedback equalisers; delays; digital simulation; indoor radio; intersymbol interference; land mobile radio; quadrature phase shift keying; radio links; radio receivers; time-varying channels; 20 Mbit/s; DFE; ISI; QPSK; Tomlinson-Harashima precoder; asymmetric scheme; channel delay spread; channel precoding; forward link; hardware complexity minimisation; indoor wireless communication system; performance; portable speed; portable unit; precoded high speed wireless communication system; receiver AGC; reverse link; simulation; time-varying indoor channels; training duration; transmission distance; Base stations; Costs; Decision feedback equalizers; Energy consumption; Hardware; Intersymbol interference; Time varying systems; Time-varying channels; Wireless LAN; Wireless communication;

fLanguage

English

Publisher

ieee

Conference_Titel

Global Telecommunications Conference, 1998. GLOBECOM 1998. The Bridge to Global Integration. IEEE

Conference_Location

Sydney,NSW

Print_ISBN

0-7803-4984-9

Type

conf

DOI

10.1109/GLOCOM.1998.775874

Filename

775874