Comparison of orthogonal CDMA and slow frequency hopping (SFH)/TDMA for picocell communications on the basis of spectral efficiency and robustness

Author

Boukli-Hacene, M. ; Leung, Chi Keun ; Kouar, M.

Author_Institution

Dept. of Electr. Eng., Polytech. Univ., New York, NY, USA

Volume

2

fYear

1997

fDate

12-16 Oct 1997

Firstpage

859

Abstract

In this analysis, the effects of co-channel interference, unintentional interference and fading on an orthogonal (O)CDMA and a slow frequency hopping (SFH)/TDMA are investigated. Both OCDMA and SFH/TDMA are small cell, low mobility systems without low-rate speech coding and other complex baseband signal processing. Further, time division duplexing (TDD) rather than frequency division duplexing (FDD) is used. Both systems have the same number of channels, system bandwidth, cell layout and voice activity detection. Following the investigations, we have found that OCDMA and SFH/TDMA are very much the same on the basis of capacity. However, SFH/TDMA is more robust to unintentional interference than OCDMA in an unlicensed environment because of easier channel switching and stronger signal-to-noise ratio under stronger jammers

Keywords

Reed-Solomon codes; cellular radio; channel capacity; cochannel interference; code division multiple access; fading; frequency hop communication; jamming; land mobile radio; signal detection; spectral analysis; voice communication; OCDMA; Reed Solomon code; SFH/TDMA; capacity; cell layout; channel switching; cochannel interference; fading; jammers; low mobility systems; orthogonal CDMA; picocell communications; slow frequency hopping; small cell systems; spectral efficiency; system bandwidth; time division duplexing; unintentional interference; unlicensed environment; voice activity detection; Bandwidth; Baseband; Fading; Frequency conversion; Interchannel interference; Multiaccess communication; Robustness; Signal processing; Speech coding; Time division multiple access;

fLanguage

English

Publisher

ieee

Conference_Titel

Universal Personal Communications Record, 1997. Conference Record., 1997 IEEE 6th International Conference on

Conference_Location

San Diego, CA

ISSN

1091-8442

Print_ISBN

0-7803-3777-8

Type

conf

DOI

10.1109/ICUPC.1997.627285

Filename

627285