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A CDMA scheme employing block processing (BS-CDMA) had been proposed earlier as an effective multiple access scheme that is robust against multiuser interference (MUI) during uplink transmission where conventional CDMA schemes fail due to orthogonality destruction. However, residual MUI arises in BS-CDMA and its degradation impact becomes severe when high mobility users are present. Two interference...
A single-carrier block-spread CDMA (BS-CDMA) system was proposed to offer multi-user interference (MUI) robustness and complexity reduction. However, perfect MUI elimination in BS-CDMA requires channels to be stationary within the block spreading duration which is not always applicable in high-rate mobile communication system. This letter proposes two novel interference cancellation methods to reduce...
In this paper, a block-spread interleaved frequency division multiple access (BS-IFDMA) scheme is proposed. It is capable of allocating users in block-level code-spreading process for multiple access on top of the IFDMA multiple access scheme for better user allocation. Orthogonality among users in block spreading is achieved when the block spreading, carried out in the time domain, is over a few...
Space-time coded block spread CDMA (STC BS-CDMA) was previously proposed to enhance the advantages offered by CDMA system with block processing. However, STC BS-CDMA suffers from long decoding delay and large single block transmission time which makes it unsuitable for communication systems delivering delay-critical applications and poor performance in systems with high mobility conditions. This paper...
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