Proceedings of the IEEK Conference (대한전자공학회:학술대회논문집)
- 2002.07b
- /
- Pages.1354-1357
- /
- 2002
Performance Analysis of Suboptimal Receiver Combining Adaptive Array Antenna and Orthogonal Decision-Feedback Detector for DS/CDMA System
- Cho, Young-pil (Department of Electronics Engineering, Inha University) ;
- Yoo, Sung-Kyun (Department of Electronics Engineering, Inha University) ;
- Lee, Hyung-ki (Department of Electronics Engineering, Inha University) ;
- Kwak, Kyung-sup (The Graduate School of Information Technology & Telecommunication, Inha University)
- Published : 2002.07.01
Abstract
In this paper, we propose a suboptimal receiver combining adaptive array antenna and orthogonal decision-feedback detector in DS/CDMA system. Adaptive array antenna can cancel out undesired signal using beamforming scheme. However, if there are interfering signals from undesired users with the same incident angle as that of a desired user, an adaptive array antenna cannot suppress them. The proposed receiver can cancel out remaining interference from users having nearly the same beam pattern. And we employ Orthogonal Decision-Feedback Detector (ODFD) as multiuser detection. The ODFD performs as good as the decorrelating decision -feedback detector (DDD) with much less complexity. Simulation results show that the proposed system provides a significantly enhanced performance.
Keywords