Abstract:

To reduce the calculation amount of distributed linearly constrained minimum variance (LCMV) beamforming in tree topology wireless sensor network (WSN), a Householder multistage Wiener filter (HMSWF) based method for distributed LCMV (D-LCMV) beamforming is proposed. The new method effectively introduces the  HMSWF technology to avoid local covariance matrix estimation and inversion. Consequently  it can get the same output performance as distributed LCMV beamforming with less amount of calculation. Computational simulation results show that the new method achieves an excellent performance.