| 摘要 |
A communications system includes a plurality of directional signal propagators, each defining a cell. The cells are arranged in a plurality of rows (R1 to R12), each row including repeating sequences of four propagators transmitting first, second, third and fourth signals (A, B, C, D), respectively, wherein the sequences in successive pairs of contiguous rows (R1, R2 etc.) are offset by one cell, and wherein diagonally arranged pairs of the propagators in pairs of contiguous rows transmit the same signal.
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