Performance of FFH-GMSK signals with CSDD scheme in frequency-selective Rayleigh channels with CCI

Author

Soliman, Kamel A M

Author_Institution

Tech. Res. Center of the Armed Forces, Cairo, Egypt

fYear

1996

fDate

19-21 Mar 1996

Firstpage

469

Lastpage

476

Abstract

A fast frequency hopping (FFH) spread spectrum technique (SS) using Gaussian minimum shift keying (GMSK) signals for data modulation and a centre sampling differential detector (CSDD) in restricted bandwidth (BW) Rayleigh channels is analyzed. The performance of the proposed system is analyzed in a two-path Rayleigh fading channel taking into account frequency-selective fading (FSF), carrier random frequency shift, intersymbol interference (ISI), Doppler frequency shift, cochannel interference (CCI) and additive white Gaussian noise (AWGN), while the receiver (RX) rejects a specified amount of adjacent channel interference (ACI). For the interference, we adopt a model which includes N statistically independent faded CCI. It is shown that the CSDD scheme is sensitive to frequency offset and there is a significant improvement in the error rate performance by utilizing the frequency diversity inherent in the FFH system compared to other systems. Therefore, this system can accommodate more users than the others and a better spectrum efficiency can be achieved

Keywords

Doppler shift; Gaussian noise; Rayleigh channels; adjacent channel interference; cochannel interference; demodulation; diversity reception; fading; frequency hop communication; interference suppression; intersymbol interference; land mobile radio; minimum shift keying; radiofrequency interference; spread spectrum communication; white noise; AWGN; Doppler frequency shift; FFH-GMSK signals; Gaussian minimum shift keying; additive white Gaussian noise; adjacent channel interference; bandwidth limited Rayleigh channels; carrier random frequency shift; centre sampling differential detector; cochannel interference; data modulation; error rate performance; fast frequency hopping; frequency diversity; frequency offset; frequency-selective Rayleigh channels; frequency-selective fading; intersymbol interference; mobile radio systems; spectrum efficiency; spread spectrum technique; system performance; two-path Rayleigh fading channel; AWGN; Detectors; Frequency diversity; Frequency shift keying; Interchannel interference; Intersymbol interference; Radiofrequency interference; Rayleigh channels; Sampling methods; Spread spectrum communication;

fLanguage

English

Publisher

ieee

Conference_Titel

Radio Science Conference, 1996. NRSC '96., Thirteenth National

Conference_Location

Cairo

Print_ISBN

0-7803-3656-9

Type

conf

DOI

10.1109/NRSC.1996.551137

Filename

551137