Method for analog beamforming and transmitter for wireless communication network

By separating and phase-shifting analog radio signals on antenna branches of high-frequency wireless communication, combined amplitude and phase beamforming is achieved, which solves the signal-to-noise ratio and sidelobe interference problems of multi-directional beamforming in existing technologies and improves system performance.

CN115349198BActive Publication Date: 2025-09-05TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
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Patent Information

Application Number
CN202080099213.8
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Priority Date
2020-04-02
Filing Date
2020-12-04
Publication Date
2025-09-05
Estimated Expiration
2040-12-04

AI Technical Summary

Technical Problem

In high-frequency wireless communications, existing time-domain analog beamforming methods have difficulty forming beams in multiple directions simultaneously while maintaining a high signal-to-noise ratio, resulting in increased sidelobe interference and decreased system throughput.

Method used

By separating the analog radio signal into the first and second signals on each antenna branch, and phase-shifting them according to branch-specific phase shift angle and amplitude information, the combined signal is combined to achieve amplitude and phase beamforming and reduce sidelobe interference.

Benefits of technology

It achieves a high signal-to-noise ratio by forming beams in multiple directions simultaneously, reduces interference, improves system throughput, and supports simultaneous multi-user communication.

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Abstract

A method for analog beamforming performed by a transmitter (110) of a wireless communication network (100) is disclosed. The transmitter (110) comprises a plurality of antenna branches (114, 115, 116), each antenna branch comprising an antenna element (111, 112, 113). The method comprises, for each antenna branch (114, 115, 116), obtaining a first and a second signal of an analog radio signal, the first and the second signal being separated from the analog radio signal and the analog radio signal being identical at each antenna branch; and obtaining information indicating a branch-specific phase shift angle and a branch-specific amplitude, the branch-specific phase shift angle and the branch-specific amplitude being determined from information identifying a radiation pattern, the radiation pattern comprising at least two directions for wireless transmission to at least one receiver (120). The method further includes phase shifting the first signal according to a first phase shift angle and phase shifting the second signal according to a second phase shift angle, the first and second phase shift angles being selected so that when the first and second signals are combined, the combined signal has a branch-specific phase shift angle and a branch-specific amplitude indicated by the obtained information; combining the phase-shifted first and second signals into a combined signal; and wirelessly transmitting the combined signal via the antenna units (111, 112, 113).
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