摘要
射频 (RF)波束形成算法 ,难以直接采用数字信号处理 (DSP)技术 ,实时完成数字波束形成 (DBF)计算 .对于相移键控 (PSK)调制方式 ,本文认为RF波束形成算法可等效在基带实现 .针对四相相移键控 (QPSK)调制方式 ,本文提出了一种新的智能天线固定多波束基带DBF算法 .与RF波束形成算法相比 ,提出的算法可实现同样的辐射方向图 ,但需要的计算量却大幅度地降低 .基带DBF算法 ,使智能天线的实现更为简单、应用更为灵活、性能更为优良 。
Radio frequency (RF) beamforming algorithms are impractical to achieve digital beamforming (DBF) directly by digital signal processing (DSP) techniques in real time.For phase shift keying (PSK) modulation techniques,this paper considers that RF beamforming algorithms can be implemented equivalently in baseband.For quadrature phase shift keying (QPSK) modulation technique,a baseband DBF algorithm of smart antenna fixed beams is presented.Compared with RF beamforming algorithms,the presented algorithm can achieve the same radiated patterns,but it requires quite low computational cost.The baseband DBF algorithm can make smart antennas be realized easily,and flexibly,perform better,and play an important role in practical applications.
出处
《电子学报》
EI
CAS
CSCD
北大核心
2003年第7期1114-1117,共4页
Acta Electronica Sinica
基金
广东高教厅自然科学研究项目 (1 999 2 67 1 4 )