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This paper introduces and analyses a novel uplink CDMA pairing diversity technique. In particular, this paper considers the use of orthogonal polyphase (OPP) sequences on the synchronous and asynchronous uplink to benefit from the codes' good cross-correlation properties. A code allocation algorithm is also presented in this paper that aims to exploit the cross-correlation properties to achieve the...
In this paper we study the performance of orthogonal poly-phase (OPP) sequences on the uplink of asynchronous code division multiple access (CDMA) systems. We explore the application of dynamic code allocation (DCA) of OPP sequences with the objective to minimize multiple access interference (MAI), arising due to the asynchronous transmission, and enhance the system's overall performance. Two DCA...
In this paper a new dynamic code distribution technique is presented. This method chooses the optimal code-to-user allocation for transmission between different combinations of the available signature waveforms according to the data to be transmitted at every symbol period by the base station (BS) at the downlink of a cellular code division multiple access (CDMA) system. The selection is done with...
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