Non-line of sight wireless communication system and method

摘要

A non-line of sight backhaul system and method are described that provides self-alignment of the antennas beams of the wireless radios of the system, that provides robust operation in licensed and unlicensed frequency bands, that facilitates the use of a reduced number of frequency channels from M to 1 and that enables operation in a non-line of sight (NLOS) propagation environment.

主权项

1. A wireless broadcast radio for backhaul applications, wireless Ethernet replacement applications and broadband wireless drop applications, the radio comprising:
an adaptive antenna array including at least two adaptive antennas; a beamforming network connected to the adaptive antenna array; a weigh processor connected to the beamforming network; and one or more baseband radios connected to the beamforming network that deliver a stream of data to an external output of the wireless broadcast radio; wherein the adaptive antenna array permits non-line of sight communications with another wireless broadcast radio; and a channel from each adaptive antenna in the adaptive antenna array, wherein the beamforming network uses an extreme interference cancellation having a space-time filter with a quarter bandwidth resolution that inverts the channel from each adaptive antenna in the adaptive antenna array and eliminates interference between the channels from each adaptive antenna in the adaptive antenna array, by directing spatial nulls in the array antenna pattern in the directions of all interfering terminating backhaul radio (TBR) while forming a beam peak in the direction of the desired TBR.