摘要
Frequency-invariant beamformer （FIB） design is a key issue in wideband array signal processing. To use commonly wideband linear array with tapped delay line （TDL） structure and complex weights, the FIB design is provided according to the rule of minimizing the sidelobe level of the beampattern at the reference frequency while keeping the distortionless response constraint in the mainlobe direction at the reference frequency, the norm constraint of the weight vector and the amplitude constraint of the averaged spatial response variation （SRV）. This kind of beamformer design problem can be solved with the interior-point method after being converted to the form of standard second order cone programming （SOCP）. The computer simulations are presented which illustrate the effectiveness of our FIB design method for the wideband linear array with TDL structure and complex weights.
Frequency-invariant beamformer （FIB） design is a key issue in wideband array signal processing. To use commonly wideband linear array with tapped delay line （TDL） structure and complex weights, the FIB design is provided according to the rule of minimizing the sidelobe level of the beampattern at the reference frequency while keeping the distortionless response constraint in the mainlobe direction at the reference frequency, the norm constraint of the weight vector and the amplitude constraint of the averaged spatial response variation （SRV）. This kind of beamformer design problem can be solved with the interior-point method after being converted to the form of standard second order cone programming （SOCP）. The computer simulations are presented which illustrate the effectiveness of our FIB design method for the wideband linear array with TDL structure and complex weights.
基金
supported by the President Award of Chinese Academy of Sciences (O729031511)
作者简介
Corresponding author.Peng Chen was born in 1978. He is a Ph.D. and an associate research fellow in the Institute of Acoustics, Chinese Academy of Sciences. His research interests include underwater acoustic signal processing and array signal processing. E-mail： chenpeng3361 @ 163.comYihui Liang was born in 1979. She received the M.S. degree in electrical engineering from the Northwestern Polytechnical University in 2003. Now she is an engineer in the Systems Engineering Research Institute, China State Shipbuilding Corporation. Her research interest includes underwater acoustic signal processing. E-mail： liangyh1016@ 163.comChaohuan Hou was born in 1936. He is an academician of the Chinese Academy of Sciences and a research fellow in the Institute of Acoustics, Chinese Academy of Sciences. His research interests include underwater signal processing, array signal processing and VLSI signal processing. E-mail：hch @ mail.ioa.acXiaochuan Ma was born in 1969. He is a Ph.D. and a research fellow in the Institute of Acoustics, Chinese Academy of Sciences. His research interests include underwater acoustic signal processing and array signal processing. E-mail：mxc @ mail.ioa.acDapeng Liu was born in 1983. He is a Ph.D. and an assistant research fellow in the Institute of Acoustics, Chinese Academy of Sciences. His research interest includes underwater acoustic signal processing. E-mail： dpliubj @ 163.com
