MIMO CDMA系统中一种新的循环空时分组编译码方法
doi: 10.3724/SP.J.1146.2005.00069
A Novel Cyclic STBC Encoding and Decoding Scheme In MIMO CDMA System
-
摘要: 该文提出了MIMO CDMA系统中一种新的空时分组编译码方法,称为循环空时分组码(Cyclic Space-Time Block Code,C-STBC),它是将输入信息进行分组循环编码,然后对循环编码后的码字通过不同的天线分别采用不同的扩频码扩频后发射出去。这种CDMA系统下的循环空时分组码对任意的发射天线数都能达到满编码速率和满分集度,且其译码与传统的空时分组码一样简单。仿真结果验证了这种循环空时分组码优于传统的空时分组码。Abstract: A novel space-time block encoding and decoding method in MIMO CDMA system is proposed in this paper. It is called Cyclic Space-Time Block Code (C-STBC). The input data stream is circularly encoded in block, and then the encoded data streams are transmitted through different antenna by multiplying different spread code respectively. The proposed C-STBC scheme in CDMA system can achieve full coding rate and full diversity gain but the decoding method is simple as the conventional STBC. Simulation results show that the proposed C-STBC is superior to the conventional STBC.
-
Yonghong Zeng, Lam W H, and Tung Sang Ng. Semiblind channel estimation and equalization for MIMO space-time coded OFDM. IEEE Transactions on Circuits and Systems I: Regular Papers. 2006, 53(2): 463-474.[2]Liu L and Jafarkhani H. Space-time trellis codes based on channel-phase feedback[J].IEEE Transactions on Communications.2006, 54(12):2186-2198[3]Maaref A and Aissa S. Performance analysis of orthogonal space-time block codes in spatially correlated MIMO Nakagami fading channels[J].IEEE Transactions on Wireless Communications.2006, 5(4):807-817[4]Xu Changjiang, Xu Hongjun, and Kwak Kyung Sup. The application of space-time codes in CDMA systems[J].VTC 2001 Spring. IEEE VTS 53rd Vehicular Technology Conference, Rhode Island, Greece, 6-9 May.2001, vol.2:1415-1419[5]Xiangbin Yu, Weiye Xu, Dazhuan Xu, and Guangguo Bi. Multiuser receiver scheme for a full-rate space-time block coded CDMA system. 2006 International Conference on Communications, Circuits and Systems Proceedings, 2006, 2: 948-952.[6]Chen H H and Yeh Y C. Capacity of space-time block-coded CDMA systems: comparison of unitary and complementary codes[J].IEE Proceedings on Communications.2005, 152(2):203-214[7]Xiaoyu Hu and Yong Huat Chew. On the performance and capacity of an asynchronous space-time block-coded MC- CDMA system in the presence of carrier frequency offset[J].IEEE Transactions on Vehicular Technology.2004, 53(5):1327-1340[8]王文博,郑侃. 宽带无线通信-OFDM技术. 北京. 人民邮电出版社, 2003: 184-188.
计量
- 文章访问数: 2705
- HTML全文浏览量: 78
- PDF下载量: 573
- 被引次数: 0