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Capacity Analysis of Spectrally Overlapping Direct-Sequence Spread Spectrum (DSSS) Channels

Capacity Analysis of Spectrally Overlapping Direct-Sequence Spread Spectrum (DSSS) Channels

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As the number of users is increased, performance of the conventional DSSS system becomes an issue. Hence, we proposed a novel approach that can provide a significant increase in the number of users in a given bandwidth over that presently available. The proposed technique is based on division of the entire channel into a number of sub-channels having a smaller bandwidth than the entire channel bandwidth. Analytical results were obtained to estimate the number of users when the channel is divided into smaller bandwidth sub-channels. It is seen from the analytical results and computer simulations that the proposed approach allows more users to be accommodated than is now possible with the conventional single carrier DSSS system.

Inspec keywords: wireless channels; code division multiple access; spread spectrum communication; channel capacity

Other keywords: spectrally overlapping direct-sequence spread spectrum channels; DSSS channel capacity analysis; channel bandwidth; computer simulation

Subjects: Multiple access communication; Radio links and equipment

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