TY - GEN
T1 - A robust beamformer with main beam control
AU - Liao, Bin
AU - Guo, Chongtao
AU - Huang, Lei
AU - Li, Qiang
AU - So, H. C.
PY - 2016/9/15
Y1 - 2016/9/15
N2 - In this paper, a new robust beamforming approach which is capable of accurately controlling the main beam response is proposed. In this method, steering vector uncertainties are taken into account in the beamformer design problem with array magnitude response constraints. This allows us to control the main beam as prescribed. However, the resultant non-convex problem has a different formulation from that of the existing methods for robust beamforming with magnitude response constraints. Thus, existing techniques cannot be applied directly. To cope with this problem, the lower and upper norm bounds of the beamformer weight vector are first derived. The semidefinite relaxation technique is then employed as an approximate solver ending up with a grid search solution. Simulation results show that the proposed method is able to accurately control the main beam magnitude response in the presence of steering vector uncertainties.
AB - In this paper, a new robust beamforming approach which is capable of accurately controlling the main beam response is proposed. In this method, steering vector uncertainties are taken into account in the beamformer design problem with array magnitude response constraints. This allows us to control the main beam as prescribed. However, the resultant non-convex problem has a different formulation from that of the existing methods for robust beamforming with magnitude response constraints. Thus, existing techniques cannot be applied directly. To cope with this problem, the lower and upper norm bounds of the beamformer weight vector are first derived. The semidefinite relaxation technique is then employed as an approximate solver ending up with a grid search solution. Simulation results show that the proposed method is able to accurately control the main beam magnitude response in the presence of steering vector uncertainties.
UR - http://www.scopus.com/inward/record.url?scp=84990855389&partnerID=8YFLogxK
UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-84990855389&origin=recordpage
U2 - 10.1109/SAM.2016.7569642
DO - 10.1109/SAM.2016.7569642
M3 - RGC 32 - Refereed conference paper (with host publication)
SN - 9781509021031
VL - 2016-September
BT - Proceedings of the IEEE Sensor Array and Multichannel Signal Processing Workshop
PB - IEEE Computer Society
T2 - 2016 IEEE Sensor Array and Multichannel Signal Processing Workshop, SAM 2016
Y2 - 10 July 2016 through 13 July 2016
ER -