Reduction of mixed co-channel interference in microcellular STDD systems

Author

Papadopoulos, Haralabos C. ; Sundberg, Carl Erik W

Author_Institution

Res. Lab. of Electron., MIT, Cambridge, MA, USA

Volume

2

fYear

1995

fDate

25-28 Jul 1995

Firstpage

759

Abstract

STDD (shared time division duplexing) is an attractive candidate for high quality, low delay multiple access in microcellular systems. We show by means of theoretical analysis that STDD is superior to conventional TDMA as well as TDMA with slow speech activity detection (SAD) in terms of capacity. We demonstrate how a type of mixed co-channel interference particular to STDD can be eliminated by means of directional antennas at the base stations for both reception and transmission, combined with appropriate organization of the time burst. Numerical results are given for a frame length of 2 ms. Capacity gains of the order of 100% over TDMA are obtained with 40 speech slots per frame and a packet dropping rate of 0.1%

Keywords

cellular radio; cochannel interference; directive antennas; interference suppression; land mobile radio; radiofrequency interference; time division multiple access; time division multiplexing; STDD systems; TDMA; base stations; capacity gain; directional antennas; frame length; low delay multiple access; microcellular systems; mixed co-channel interference reduction; numerical results; packet dropping rate; shared time division duplexing; time burst; Base stations; Delay effects; Directional antennas; Downlink; Interchannel interference; Laboratories; Personal communication networks; Protocols; Speech analysis; Time division multiple access;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 1995 IEEE 45th

Conference_Location

Chicago, IL

ISSN

1090-3038

Print_ISBN

0-7803-2742-X

Type

conf

DOI

10.1109/VETEC.1995.504970

Filename

504970