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On the uplink capacity of cellular CDMA and TDMA over nondispersive channels

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3 Author(s)
Sari, H. ; Alcatel Access Syst. Div., Nanterre, France ; Steendam, H. ; Moeneclaey, M.

We investigate the interuser interference on the uplink channel (from users to base station) in cellular code-division multiple access (CDMA) and time-division multiple access (TDMA) systems. The results indicate that for the same total bandwidth occupancy and maximum number of users per cell, interuser interference is approximately 10 dB higher in CDMA in fully loaded cells. The implication of these results is that for the same total bandwidth and number of users per cell, TDMA gives superior bit error rate (BER) performance, as confirmed by our numerical results on additive white Gaussian noise (AWGN) channels as well as on flat Rayleigh fading channels. Alternatively, CDMA needs approximately 10 times more bandwidth than TDMA to achieve the same signal-to-interference (S/I) ratio and bit error rate performance in fully loaded cells.

Published in:

Vehicular Technology Conference, 1999 IEEE 49th  (Volume:2 )

Date of Conference:

16-20 May 1999

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