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Enhancement in BER Performance by Adaptive Sector Antennas in CDMA Wireless Multi-media Communications  

Lee, Ju-Hyung (국방과학연구소)
Kim, Young-Chul (한국항공대학교 전자정보통신컴퓨터공학부)
Oh, Chang-Heon (한국기술교육대학교 정보기술공학부)
Cho, Sung-Joon (한국항공대학교 전자정보통신컴퓨터공학부)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.27, no.10A, 2002 , pp. 980-989 More about this Journal
Abstract
In this paper, we have proposed the sectorization method of the adaptive sector antenna and the new receiver structure for the CDMA wireless multi-media communication which uses multi-code and single-code. The sectorization and average BER performance of the adaptive sector antenna, which employs the proposed sectorization method, are obtained through simulation. The simulation results have shown that the sizes of sectors are properly controlled according to the distribution of the load and that the BER performance of the adaptive sector antenna is enhanced much more than that of the fixed sector antenna. Also, we have proposed two receivers, which are different from the positions to detect multi-code signals, for the multi-media communication. Each receiver has a simple cancellation scheme and two adaptive sector antennas, which are called the 1st adaptive sector antenna and the 2nd adaptive sector antenna, respectively. In this paper, the average BER performances of the receivers are compared through simulation. As the results of the simulation, we have recognized that all user' BER performances are greatly dependent on the positions to detect the multi-code signals. When we consider both system complexity and terget BERs of signals, we have concluded that the receiver, which detect multi-code signals in the 1st and the 2nd adaptive sector antenna, is appropriate for the CDMA wireless multi-media communication systems.
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