Title :
Antenna-diversity-assisted ant-colony-based multiuser detection for DS-CDMA systems
Author :
Lai, Jhe-Jyun ; Lain, Jenn-Kaie
Author_Institution :
Dept. of Electron. Eng., Nat. Yunlin Univ. of Sci. & Technol., Taiwan
Abstract :
An ant colony optimization (ACO) based multiuser detector assisted with a spatial diversity reception in direct-sequence code-division multiple access (DS-CDMA) is proposed. This detector combines features of joint detection and collective intelligence of ants can offer almost the same bit (BER) performance as the optimum full-search-based multiuser detector does while it can greatly reduced the computational complexity. Furthermore, the near-far resistance of the ACO-based multiuser detector is also examined. The BER performance for k = 20 remains almost the same, even when the interfering users´ energy is 10dB higher, than that of the desired user.
Keywords :
antenna theory; code division multiple access; communication complexity; diversity reception; optimisation; spread spectrum communication; DS-CDMA systems; ant colony optimization; antenna-diversity-assisted ant-colony-based multiuser detection; collective intelligence; computational complexity; direct-sequence code-division multiple access; joint detection; near-far resistance; spatial diversity reception; Ant colony optimization; Bit error rate; Computational complexity; Computational intelligence; Computer vision; Detectors; Direct-sequence code-division multiple access; Diversity reception; Multiaccess communication; Multiuser detection; Antenna diversity; ant colony optimization; code-division multiple access (CDMA); multiuser detection;
Conference_Titel :
Cellular Neural Networks and Their Applications, 2005 9th International Workshop on
Print_ISBN :
0-7803-9185-3
DOI :
10.1109/CNNA.2005.1543172
