Title :
Adaptive digital beamforming techniques in transmission antenna arrays
Author :
Yu, Shiyun ; Gong, ZhengQuan
Author_Institution :
Nanjing Inst. of Telecommun. Technol., China
Abstract :
A transmission beamforming scheme based on recursive least squares (RLS) algorithm is presented which can be used to implement multi-beam pointing to different angles. The equivalent feed model of the antenna arrays is derived under multi-user condition by non-coherent superposition of the field and the system model of transmission arrays based on digital beamforming is established. Simulation results are also presented and prove that the scheme is effective to increase the capacity of wireless communication systems by reusing a channel among several users.
Keywords :
adaptive antenna arrays; array signal processing; channel capacity; least squares approximations; recursive estimation; adaptive digital beamforming; channel reuse; equivalent feed model; multi-beam pointing; multi-user condition; noncoherent superposition; recursive least squares algorithm; transmission antenna arrays; transmission beamforming scheme; wireless communication systems; Adaptive arrays; Antenna arrays; Antenna feeds; Array signal processing; Least squares methods; Linear antenna arrays; Radio frequency; Receiving antennas; Resonance light scattering; Transmitting antennas;
Conference_Titel :
Microwave and Millimeter Wave Technology, 2004. ICMMT 4th International Conference on, Proceedings
Print_ISBN :
0-7803-8401-6
DOI :
10.1109/ICMMT.2004.1411499
