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Cooperative Diversity Reciprocity Calibration Method for Multi-antenna Systems

A multi-antenna system and cooperative diversity technology, applied in the field of communication, can solve the problems of destroying the reciprocity of communication channels, etc., and achieve the effect of simple implementation, overcoming fluctuations, and strong robustness

Active Publication Date: 2017-09-08
SOUTHEAST UNIV
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Problems solved by technology

And the mismatch of RF gain will destroy the reciprocity of the communication channel

Method used

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  • Cooperative Diversity Reciprocity Calibration Method for Multi-antenna Systems
  • Cooperative Diversity Reciprocity Calibration Method for Multi-antenna Systems
  • Cooperative Diversity Reciprocity Calibration Method for Multi-antenna Systems

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Embodiment Construction

[0026] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0027] (1) Downlink precoding signal model of multi-user MIMO system

[0028] The mobile communication network MIMO system architecture of this embodiment is as follows figure 1 and figure 2 As shown, the following two scenarios are included: (1) centralized system, there is a base station BS equipped with multiple antennas in the cent...

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Abstract

The invention discloses a cooperative diversity reciprocity calibration method for a multi-antenna system. The method is applicable to a base station which is configured with multiple antennas in a centralized manner, or applicable to multiple wireless access units which are distributed. The method comprises the following steps: antennas at a base station side or a wireless access unit side transmit and receive calibration signals to and from each other in a plurality of calibration time slots; the received signals are merged; and the calibration coefficient of each antenna is worked out. The method has the advantages of high algorithm robustness, no need for user participation and no need for feedback.

Description

technical field [0001] The invention belongs to the technical field of communication, in particular to a multi-antenna multi-user space division multiple access wireless communication system in a time division duplex communication mode. Background technique [0002] With the development of communication technology, multi-antenna technology is proposed to achieve higher spectrum efficiency. The mobile communication network MIMO system includes the following two scenarios: (1) centralized system, there is a BS equipped with multiple antennas in the center of the cell. (2) In a distributed system, multiple RAUs are deployed in a cell, and links for information exchange exist between all RAUs. [0003] In a MIMO system, the transmitting side needs to know accurate downlink channel information, perform downlink precoding, serve multiple users, and improve system performance. In a time division duplex (Time Division Duplexing, TDD) communication mode, the BS or the RAU can use c...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B17/12H04B7/0408H04B7/0413
CPCH04B7/0413
Inventor 王东明魏浩尤肖虎
Owner SOUTHEAST UNIV
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