Title :
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
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;
Conference_Titel :
TENCON 99. Proceedings of the IEEE Region 10 Conference
Conference_Location :
Cheju Island
Print_ISBN :
0-7803-5739-6
DOI :
10.1109/TENCON.1999.818637
