Title :
Block coded 16 QAM-TDMA cellular radio system using cyclical slow frequency hopping
Author :
Sasaoka, Hideichi
Author_Institution :
Minist. of Posts & Telecommun. of Japan, Tokyo, Japan
Abstract :
A TDMA cellular system using cyclical slow frequency hopping and a block-coded quadrature amplitude modulation (QAM) is presented. The QAM scheme reduces the required bandwidth for voice channels. The combination of frequency hopping and coding offers immunity against multipath fading and interference. The sectorization and voice activity are used to reduce cochannel interference. These techniques increase the frequency reuse factor. The proposed system can achieve a capacity increase 13 times greater than that of analog systems
Keywords :
amplitude modulation; block codes; cellular radio; channel capacity; encoding; frequency agility; interference suppression; time division multiple access; block-coded 16 QAM-TDMA cellular radio system; block-coded quadrature amplitude modulation; capacity; cochannel interference reduction; coding; cyclical slow frequency hopping; frequency reuse factor; interference immunity; multipath-fading immunity; Bit error rate; Fading; Frequency estimation; Interference; Land mobile radio cellular systems; Modulation coding; Multiaccess communication; Quadrature amplitude modulation; Spread spectrum communication; Time division multiple access;
Conference_Titel :
Vehicular Technology Conference, 1992, IEEE 42nd
Conference_Location :
Denver, CO
Print_ISBN :
0-7803-0673-2
DOI :
10.1109/VETEC.1992.245366
