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Sparse signatures have been proposed for the code-division multiple-access (CDMA) uplink to reduce multiuser detection complexity, but they have not yet been fully exploited for its downlink counterpart. In this paper, we propose multicarrier CDMA (MC-CDMA) downlink communication whereby regular sparse signatures are deployed in the frequency domain. Taking the symbol detection point of view, we formulate...
In this paper, we propose a frequency domain equalizer (FDE) without inserting the guard interval (GI) at the transmitter in the wide-band code division multiple access (WCDMA) system. The proposed FDE adopts the overlap-cut (OC) method to avoid the inter-block interference (IBI) and exploits the decision feedback structure to improve the bit error rate (BER) performance. Without inserting the GI,...
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