Title :
Combined equalization and cochannel interference cancellation for the downlink using tentative decisions
Author :
Medepalli, James ; Mandayam, Narayan
Author_Institution :
Dept. of Electr. & Comput. Eng., Rutgers Univ., Piscataway, NJ, USA
Abstract :
The capacity of TDMA digital cellular systems like IS-136, GSM and their evolution IS-136HS and EDGE is limited by the intersymbol interference (ISI) arising from multipath propagation and co-channel interference (CCI) due to frequency reuse. The focus of this work is to develop for the downlink, a low complexity signal enhancing receiver that will work with a single receive antenna. This paper proposes a technique to combat both ISI and CCI using tentative decisions obtained through a preliminary detector. These decisions are used in mitigating ISI and CCI to produce final decisions. It is shown that the receiver proposed offers significant gains at high interfering signal powers especially when the channel memory is low
Keywords :
cellular radio; cochannel interference; digital radio; equalisers; interference suppression; intersymbol interference; multipath channels; time division multiple access; CCI mitigation; EDGE; GSM; IS-136; IS-136HS; ISI mitigation; TDMA digital cellular systems; channel estimation; co-channel interference cancellation; downlink; equalization; frequency reuse; intersymbol interference; low complexity signal enhancing receiver; multipath propagation; preliminary detector; single receive antenna; tentative decisions; Detectors; Downlink; Frequency; GSM; Interchannel interference; Interference cancellation; Intersymbol interference; Radiofrequency interference; Receiving antennas; Time division multiple access;
Conference_Titel :
Vehicular Technology Conference, 1999 IEEE 49th
Conference_Location :
Houston, TX
Print_ISBN :
0-7803-5565-2
DOI :
10.1109/VETEC.1999.778228
