Abstract: In GSM based passive bistatic radar, the antenna not only receives the direct signal and multipath signals from the host station, but also receives the signals from other base stations with the same frequency. When the data-independent beamformer is used to acquire the direct signal of the host station, it may be polluted by other signals. The direction of the direct signal of the host station can be first measured by a sub-space method. Then the direct signal is acquired by the signal blocking based adaptive beamformer. The availability of proposed method is proved by simulation data and compared in the practical data. The result shows that the proposed method is more applicable than the traditional LCMV self-adaption beam forming method.

Key words: radar engineering, passive biostatic radar, GSM signal, direct signal extraction, array antenna