Beamforming (BF) weight assigning method and device

Abstract

The invention provides a beamforming (BF) weight assigning method and a BF weight assigning device, used for reducing power dividing insertion loss of the BF, and avoiding electromagnetic interference between a power dividing network and each base band port-antenna unit channel. The device provided by the embodiment of the invention comprises M optical carrier modules, M electro-optical modulation modules, M optical delay modules, a branch wavelength division multiplexer (WDM), N photovoltaic conversion modules, and an antenna array with a k*N antenna unit, wherein M and N are integers more than or equal to 1; the optical carrier modules are used for generating N optical carriers with different wavelengths; the electro-optical modulation modules are used for modulating electrical signals to the optical carriers to acquire a modulated optical signal; the optical delay modules are used for adjusting delay of the modulated optical signal; the branch WDM is used for shunting according to the wavelength of the modulated optical signal after the delay is adjusted to acquire N optical sub-signals; the photovoltaic conversion modules are used for converting the N optical sub-signals into N electric sub-signals; and the antenna array is used for forming a plurality of beams with adjustable direction according to N radio frequency electric signals.

Description

technical field [0001] The present application relates to the field of communication technologies, and in particular to a method and device for assigning beamforming (Beamforming, BF) weights. Background technique [0002] Since the high-frequency frequency band has a large bandwidth resource, the high-frequency frequency band is considered for 5G mobile communication to increase the data rate, such as 15GHz, 28GHz, 38GHz, 60GHz, 73GHz and other centimeter wave and millimeter wave bands. Access or backhaul system for 5G mobile communications. In addition to providing greater bandwidth, the high-frequency band also has a small wavelength, and the size of the antenna unit used to transmit the signal is small, so the transceiver can integrate multiple antenna units. However, compared with the low frequency band less than 3GHz, the transmission loss of centimeter wave and millimeter wave is much larger. [0003] BF is one of the main technical methods to overcome the large los...

AI Technical Summary

Problems solved by technology

[0004] However, the sub-array connection HBF architecture cannot fully utilize the gain of each antenna unit because each baseband port is only connected to one antenna sub-array, and the capacity is lower than that of the fully-connected HBF; while the traditional fully-connected HBF architecture has a large number of antenna units, More power splitters are needed, for example, when there are 4 baseband ports and 128 antenna units, 4*127 power splitters and 3*128 combiners are needed, and the combiner is also a kind of power splitter , so that the number of power splitters is as high as 892, the power splitter introduces a power splitting insertion loss of 7dB, and a combining insertion loss of 2dB, and the power splitting network is complex, making the electromagnetic between the power splitting network and each baseband port-antenna unit channel severe interference

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