Orthogonal- and Cyclic- Inherent MIMO-CDMA Systems
碩士 === 國立成功大學 === 電腦與通信工程研究所 === 95 === For Multi-input-Multi-output (MIMO) systems, space-time coding such as Space-Time Block Codes (STBC) are taken to yield good performance in quasi-static channel. Unfortunately, conventional MIMO-CDMA with STBC will suffer from an error floor in non quasi-stati...
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| Format: | Others |
| Language: | en_US |
| Published: |
2007
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| Online Access: | http://ndltd.ncl.edu.tw/handle/07915918052131879420 |
| Summary: | 碩士 === 國立成功大學 === 電腦與通信工程研究所 === 95 === For Multi-input-Multi-output (MIMO) systems, space-time coding such as Space-Time Block Codes (STBC) are taken to yield good performance in quasi-static channel. Unfortunately, conventional MIMO-CDMA with STBC will suffer from an error floor in non quasi-static channel and need an additional equalizer to combat this problem. So as to decrease the complexity of system, the novel orthogonal- and cyclic- inherent MIMO-CDMA systems are proposed in this thesis.
The proposed schemes which provide arbitrary transmission rate and diversity order for any number of transmit antennas with real or complex constellations are designed based on the orthogonal and cyclic concepts for simply decoding and fully taking the advantage of diversity. Furthermore, the upper bound analyses and the exact error probability for the proposed scheme are also derived.
Simulation results and performance analyses show that the proposed scheme can be decoded by a significant low complexity Maximum Likelihood(ML) decoder and remain similar performance as conventional MIMO-CDMA with STBC scheme in quasi-static channel; besides, it outperforms the conventional one as channel becomes non quasi-static.
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