关键词: 对跖通信, 相干带宽, 窄波束, 等效对跖点

Abstract: The authors introduce equivalent antipodes at the receiver to transform the antipodal propagation to several equivalent point-to-point communication systems. Since many communication directions are permitted in the antipodal propagation, especially each of which carries on different propagation modes with respective time delay and received power, the channel experiences a strong characteristic of frequency selective fading. In order to strengthen the received power and increase the coherence bandwidth, an adaptive antenna array is applied in the transmitter with narrow beams spatially concentrating the transmission energy on the main path and suppressing the other multipath resulting in delay spread. Simulation results verify the efficiency of this proposal.

Key words: antipodal propagation, coherence bandwidth, narrow beam, equivalent antipode