Automatic gain control of 16 QAM in microcell Rayleigh fading channel

Author

Jeong, Goo-Young ; Lee, Moon-Ho

Author_Institution

Dept. of Inf. & Telecommun., Chon-Bak Nat. Univ., Chon-Ju, South Korea

Volume

2

fYear

1999

fDate

36495

Firstpage

1182

Abstract

In this paper, we introduce the time constant of an AGC (automatic gain control) loop filter which is very important in the micro cell environment and its duration should be around 12 λ of the carrier frequency. Furthermore, we introduce the performance measurement system of pilot symbol assisted 16 quadrature amplitude modulation (QAM) system which use 3/4 trellis coded modulation with a sub-optimum Viterbi decoder. The sub-optimum Viterbi decoder required only 1/3 computation complexity of the conventional Viterbi decoder, with negligible performance degradation in the field test

Keywords

Rayleigh channels; Viterbi decoding; automatic gain control; computational complexity; microcellular radio; quadrature amplitude modulation; trellis coded modulation; 16 QAM; Rayleigh fading channel; automatic gain control; microcellular radio; quadrature amplitude modulation; sub-optimum Viterbi decoder; time constant; trellis coded modulation; Amplitude modulation; Decoding; Filters; Frequency; Gain control; Measurement; Microcell networks; Quadrature amplitude modulation; Rayleigh channels; Viterbi algorithm;

fLanguage

English

Publisher

ieee

Conference_Titel

TENCON 99. Proceedings of the IEEE Region 10 Conference

Conference_Location

Cheju Island

Print_ISBN

0-7803-5739-6

Type

conf

DOI

10.1109/TENCON.1999.818637

Filename

818637