Paper Info
Title
BER Analysis of a Novel Hybrid Modulation Scheme for Noncoherent DS-CDMA Systems
Abstract
A novel DS-CDMA transmission scheme combining the two well-known techniques of -ary orthogonal and differential PSK-modulation is presented. This "hybrid" scheme is ap- plicable to the noncoherent uplink of the IS-95 system where up to now only -ary orthogonal modulation is used. The additional, PSK-modulated data show a slightly increased bit error rate (BER) compared to the data from -ary modu- lation. However, the overall degradation caused hereby is far outweighed by the gain achieved by a higher spreading factor. Analytical results confirmed by simulations yield an improvement of approximately in terms of on a Rayleigh fading channel when no channel coding is used. This considerable gain is achieved upon only slight modifica- tion of the conventional modulation/demodulation procedure at a low additional complexity. It will be demonstrated that the IS-95 system is not properly designed since the full ex- ploitation of noncoherent demodulation techniques results in a gain of nearly .
Year
DOI
Venue
1997
10.1109/PIMRC.1997.630892
personal indoor and mobile radio communications
Keywords
DocType
Volume
Rayleigh channels,code division multiple access,error statistics,fading,land mobile radio,phase shift keying,spread spectrum communication,1.0 dB,2.0 dB,BER analysis,IS-95 system,M-ary orthogonal modulation,Rayleigh fading channel,bit error rate,complexity,degradation,differential PSK-modulation,gain,hybrid modulation scheme,modulation/demodulation procedure,noncoherent DS-CDMA systems,noncoherent demodulation,noncoherent uplink,spreading factor
Conference
2
Citations 
PageRank 
References 
0
0.34
1
Authors
2
Name
Order
Citations
PageRank
Dirk Nikolai110.77
Karl-dirk Kammeyer220825.30