Forward transmission over a multipath faded channel in a DS CDMA system

Authors:
Abdel-Rahman Al-Qawasmi;Omar Al-Ayasrah;Ayman Al-Lawama
Affiliations:
Philadelphia University, Communications & Electronics Dept., Amman, Jordan;Department of Electrical Engineering, Mu'tah University, Jordan;Department of Electrical Engineering, Mu'tah University, Jordan
Venue:
WSEAS Transactions on Circuits and Systems
Year:
2009

Citing 4
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Abstract

The pseudorandom spreading sequence in the forward transmission in the IS -95 system is assigned only to individual base stations. To separate users, the system assigns orthogonal (Hadamard) sequences to each of them. In this paper, a different scheme for the forward transmission is considered. In this scheme pseudorandom sequences are used, instead of employing orthogonal spreading sequence for individual users. The effect of fade amplitudes, phase shifts, time -mismatching and AWGN on the detection process of Gold Sequence Spread Spectrum Signal (GSSSS) is considered.