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Method and controller for receive beam steering in mimo system and radio unit and base station

A technology for receiving beams and controllers, which is applied in the field of radio units and base stations, and can solve the problems of reduced receiver performance and high cost

Active Publication Date: 2022-04-29
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when existing solutions for receive beam steering are used for massive MIMO, new problems arise, resulting in reduced performance or very high cost for the receiver

Method used

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  • Method and controller for receive beam steering in mimo system and radio unit and base station
  • Method and controller for receive beam steering in mimo system and radio unit and base station
  • Method and controller for receive beam steering in mimo system and radio unit and base station

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Embodiment Construction

[0043] In the following description, for purposes of explanation, certain details are set forth in order to provide a thorough understanding of the disclosed embodiments. It is apparent, however, to one skilled in the art that the described embodiments may be practiced without these specific details or with an equivalent arrangement.

[0044] As mentioned above, during beam scanning, the power level and phase of the signal received from the antenna array may change rapidly, and thus receive beam steering is performed in the receiver. In general, an automatic gain control (AGC) function is often used in a receiver to ensure that signals received by the receiver are processed at an appropriate power level (also referred to as signal power). For example, an AGC function may be used to adjust the gain of a received signal in response to high power levels. image 3 is a schematic architecture diagram of the AGC function. As shown, the RF front end includes a low noise amplifier (...

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Abstract

A method and controller for receive beam steering in a MIMO system are disclosed. According to an embodiment, the measured power of the signal is obtained from a power meter. The signal is generated by a beamforming combiner by combining multiple inputs from the antenna array and represents a first receive beam having a first gain and a first pointing direction. Whether to apply beam gain control is determined based on the obtained power. In response to a positive judgment result, a target gain is determined. Convert target gain to target beamforming parameters. Target beamforming parameters are provided to a beamforming combiner such that the first receive beam is replaced by a second receive beam having a target gain and a first pointing direction. A radio unit including the controller and a base station including the radio unit are also disclosed.

Description

technical field [0001] Embodiments of the present disclosure relate generally to wireless communications, and more particularly to methods and controllers and radio units and base stations for receive beam steering in Multiple Input Multiple Output (MIMO) systems. Background technique [0002] Antenna arrays have been widely used in base stations. Antenna arrays typically include a set of individual antenna elements. Combined with MIMO technology, the capacity of wireless channels can be increased without increasing bandwidth and transmit power. More recently, massive MIMO (also known as massive antenna system, very large MIMO or very large MIMO) has been developed. It utilizes a large number (eg, hundreds or thousands) of serving antennas that operate fully coherently and adaptively. As a result, the transmission and reception of signal energy can be focused on smaller and smaller spatial areas. This can lead to huge improvements in throughput and energy efficiency, esp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/06
CPCH04L5/0023H04W52/42H04B7/0848H04B7/0617H04B7/0639H03G3/3042H04B7/02H04W72/23
Inventor 李鸣缪庆育汪剑锋V·加西亚
Owner TELEFON AB LM ERICSSON (PUBL)