Diversity receiver of a CDMA system in mobile multipath fading environments

Author

Yang, Jin ; Sood, Prem

Author_Institution

Sharp Microeletron. Technol. Inc., Camas, WA, USA

Volume

2

fYear

1995

fDate

25-28 Jul 1995

Firstpage

684

Abstract

A diversity receiver of a code division multiple access (CDMA) system is studied. Frame-error-rate (FER) and bit-error-rate (BER) of the forward traffic channel are obtained by using a simulation system based on TIA/EIA/IS-95. A diversity receiver structure with an adaptive search engine is developed and analyzed. The adaptive rate of the search engine is optimized to achieve high diversity gain. The relationship between receiver diversity gain and multipath channel characteristics is derived. Compared with classical diversity schemes, the proposed diversity receiver has better performance and simpler structure. The multipath channel characteristics have a major impact on the system performance. Uncaptured energy acts as interference, which can increase the FER by an order of magnitude and reduce system capacities. The system performance for the indoor and outdoor environments are obtained by utilizing the proposed diversity receiver

Keywords

code division multiple access; diversity reception; error statistics; fading; indoor radio; land mobile radio; multipath channels; pseudonoise codes; radio receivers; radiofrequency interference; search problems; spread spectrum communication; CDMA system; DS-SS; TIA/EIA/IS-95; adaptive search engine; bit-error-rate; code division multiple access; diversity receiver; forward traffic channel; frame-error-rate; indoor environments; interference; mobile multipath fading environments; multipath channel characteristics; outdoor environments; performance; uncaptured energy; Delay effects; Diversity methods; Diversity reception; Fading; Interference; Multiaccess communication; Multipath channels; RAKE receivers; Search engines; System performance;

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.1995.504955

Filename

504955