http://scholars.ntou.edu.tw/handle/123456789/18396
標題: | Low-Complexity Spatial-Frequency-Time-Domain MMSE Multiuser Detectors for MC DS-CDMA | 作者: | Hoang-Yang Lu Hsien-Sen Hung Chin-Feng Lin Ching-Hsiang Tseng Yen-Yu Chen |
關鍵字: | Signal to noise ratio;Multiuser detection;Multiaccess communication;Discrete Fourier transforms | 公開日期: | 十一月-2010 | 會議論文: | 2010 IEEE 12th International Conference on Communication Technology Nanjing, China |
摘要: | This paper presents three multiuser detectors (MUDs) for the uplinks of spatial-frequency-time-domain (SFT-domain) spread multi-carrier (MC) direct sequence code division multiple access (DS-CDMA) systems. First, aiming at achieving significant performance gain, we propose a joint optimum SFT-domain MUD based on minimum mean square error (MMSE) decision rules. Further, to reduce the computational complexity, we decompose the SFT-domain received signal to low-dimension signal components and propose the corresponding separate MMSE MUDs. Complexity analysis and computer simulations show that the joint optimum SFT-domain MMSE MUD performs the best among the proposed schemes. Meanwhile, the separate MMSE MUDs can provide effective performance close to that of the joint optimum SFT-domain MMSE MUD but with a modest computational overhead. |
URI: | http://scholars.ntou.edu.tw/handle/123456789/18396 | DOI: | 10.1109/ICCT.2010.5688879 |
顯示於: | 電機工程學系 |
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