NOVEL LSCM BEAM-FORMING ALGORITHM IN SMART ANTENNA MC-CDMA SYSTEM  

作　　者：Fu Hongliang Feng Guangzeng 

机构地区：[1]Nanjing University of the Posts and Telecommunications, Nanjing 210003, China [2]Henan University of Technology, Zhengzhou 450052, China

出　　处：《Journal of Electronics(China)》2006年第4期501-505,共5页电子科学学刊（英文版）

基　　金：Sponsored by the National Natural Science Fundation of China (No.60472104), Natural Science Research Project of Jiangsu Province (04KJB510094) and Doctoral In-novative Fund of Jiangsu Province (xm04-32).

摘　　要：A novel Least Squares Constant Modulus (LSCM) beam-forming algorithm in smart antenna Multi-Carrier Code Division Multiple Access (MC-CDMA) system is proposed in this paper. It adaptively beam-forms the multi-carrier antenna array signal using the LSCM Algorithm (LSCMA), and in the meantime, the beam-formed signals on every sub-carrier are combined by using Orthogonal Restore Combination (ORC), Equal Gain Combination (EGC) or Maximum Ratio Combination (MRC). Then the decision of the combined signals and the spread-code of the expected user are used to re-construct the signals on every sub-carrier. At last, the difference between the re-constructed signal and the output signal of the beam-former is used to con-trol the coefficients of the beam-former. The bit error probability of the proposed algorithm is analyzed. We simulated and compared it with the conventional LSCM beam-forming algorithm. Simulation results show that the proposed algorithm is superior to the latter in Bit Error Rate (BER).A novel Least Squares Constant Modulus （LSCM） beam-forming algorithm in smart antenna Multi-Carrier Code Division Multiple Access （MC-CDMA） system is proposed in this paper. It adaptively beam-forms the multi-carrier antenna array signal using the LSCM Algorithm （LSCMA）, and in the meantime, the beam-formed signals on every sub-carrier are combined by using Orthogonal Restore Combination （ORC）, Equal Gain Combination （EGC） or Maximum Ratio Combination （MRC）. Then the decision of the combined signals and the spread-code of the expected user are used to re-construct the signals on every sub-carrier. At last, the difference between the re-constructed signal and the output signal of the beam-former is used to control the coefficients of the beam-former. The bit error probability of the proposed algorithm is analyzed. We simulated and compared it with the conventional LSCM beam-forming algorithm. Simulation results show that the proposed algorithm is superior to the latter in Bit Error Rate （BER）.

关 键 词：Smart antenna MULTI-CARRIER Least Squares Constant Modulus Algorithm （LSCMA） BEAMFORMING 

分 类 号：TN91[电子电信—通信与信息系统]