DocumentCode :
1615181
Title :
Dynamic Code Allocation for Constructive Interference Exploitation in DS-CDMA Systems
Author :
Alsusa, E. ; Masouros, C. ; Rico, U. Pineda
Author_Institution :
Sch. of Electr. & Electron. Eng., Univ. of Manchester, Manchester
fYear :
2008
Firstpage :
871
Lastpage :
875
Abstract :
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 the aim to minimise the destructive and maximize constructive interference between users. This effectively spreads the signal constellation and enhances the signal to interference-plus-noise ratio (SINR) at the receiver with no additional power-per-user investment. However, the trade-off to this is some extra side information. Theoretical analysis and simulations presented suggest that this method can provide a bit error rate reduction of an order of a magnitude when combined with multiuser detection.
Keywords :
cellular radio; code division multiple access; multiuser detection; radiofrequency interference; spread spectrum communication; DS-CDMA systems; base station; bit error rate reduction; cellular code division multiple access; constructive interference; constructive interference exploitation; dynamic code allocation; dynamic code distribution technique; multiuser detection; optimal code-to-user allocation; power-per-user investment; signal to interference-plus-noise ratio; signature waveforms; Analytical models; Base stations; Bit error rate; Constellation diagram; Downlink; Interference; Investments; Multiaccess communication; Multiuser detection; Signal to noise ratio;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Communications, 2008. ICC '08. IEEE International Conference on
Conference_Location :
Beijing
Print_ISBN :
978-1-4244-2075-9
Electronic_ISBN :
978-1-4244-2075-9
Type :
conf
DOI :
10.1109/ICC.2008.171
Filename :
4533207
Link To Document :
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