Antenna Array Beam Shaping with Binary Phase Side-Lobe Control

The patent applies periodic action by using time-interleaved transmission with multiple code sequences across different time intervals. The transmit antennas are scanned by various code-sequences over several time intervals, and the reflected signals are combined after applying different phase shifts in each interval. This periodic time-multiplexed approach enables fine-grain phase control equivalent to QPSK while using only simple binary phase shifters, thereby reducing side lobes and energy dissipation without increasing device complexity

The patent introduces a time dimension to resolve the contradiction. Instead of achieving fine phase control through complex spatial phase shifters, the invention uses time-interleaved transmission where different phase shifts are applied in different time intervals. The post-processing combines signals from multiple time intervals with appropriate phase corrections, effectively adding a temporal dimension to achieve the phase control resolution that would otherwise require complex hardware

The patent uses copying by transmitting the same base signal through multiple time intervals with different binary phase shifts applied to different antenna subsets. Each time interval creates a copy of the transmission with a different phase code, and the received copies are combined in post-processing to synthesize the desired directional beam. This copying approach across time enables arbitrary phase shift functionality using only simple binary phase shifters

The patent introduces post-processing as an intermediary that performs the complex phase combination operations. Instead of implementing complex phase shifters in the transmit path, the invention uses simple binary phase shifters as intermediaries and performs the sophisticated phase control in the receive path through signal combination and phase correction algorithms