This letter introduces a novel passive beamformer which uses Bridge function sequence as spreading sequence weights for every antenna element. The set of Bridge function sequences have zero correlation zones (ZCZs) in their cross-correlation functions (CCFs). Due to the ZCZ properties of Bridge function sequences, the introduced passive beamformer features a much better performance on avoiding synchronization errors than the passive beamformers utilizing other spreading sequences without ZCZ.

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... e theoretical justification of the proposed approach is presented in detail and the achievable performance is verified through computer simulations.