Dominant Pilot Recovery in IS-95 CDMA Systems Using Repeaters
1999 (English)Conference paper (Refereed)
We investigate the use of repeaters to combat the problem of pilot pollution in IS-95 CDMA systems. For the purpose, we have formulated the problem into a manageable optimization model and suggested a greedy-type algorithm that determines the number and locations of repeaters needed. Simula- tion studies have been carried out by applying the algorithm to an actual CDMA network in which pi- lot pollution was present. The simulation results have been verified by field trials performed on the same area. They indicate that, by recovering a dominant pilot, repeaters are able to cope with the pilot pollu- tion problem, thus improving call quality. Since the cost of installation and field maintenance for repeaters is relatively low, our results show that the repeater is is a very efficient and cost-effective way to mitigate the effects of pilot pollution in IS-95 CDMA systems.
Place, publisher, year, edition, pages
IEEE , 1999.
Computer and Information Science
Research subject SRA - ICT
IdentifiersURN: urn:nbn:se:kth:diva-28117OAI: oai:DiVA.org:kth-28117DiVA: diva2:383976
Int. Symp. Personal, Indoor and Mobile Radio Communications (PIMRC)
QC 201101112011-01-062011-01-062011-01-11Bibliographically approved