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Calibrating method and apparatus for radio frequency circuit of time division duplexing MIMO multi-antenna communicating system

A wireless communication system, time-division duplex technology, applied in diversity/multi-antenna systems, multi-frequency code systems, transmission systems, etc., can solve problems such as the destruction of simple transposition correspondences, inconsistent radio frequency paths of transceivers, etc.

Active Publication Date: 2008-10-22
SPREADTRUM COMM (SHANGHAI) CO LTD
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Problems solved by technology

However, in practical communication systems, due to the inconsistency of the radio frequency path of the transceiver, this simple transpose correspondence is severely damaged

Method used

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  • Calibrating method and apparatus for radio frequency circuit of time division duplexing MIMO multi-antenna communicating system
  • Calibrating method and apparatus for radio frequency circuit of time division duplexing MIMO multi-antenna communicating system
  • Calibrating method and apparatus for radio frequency circuit of time division duplexing MIMO multi-antenna communicating system

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Abstract

The invention discloses a calibrating device for a time division duplexing MIMO multi-antenna communication system radio frequency circuit, a method for the same, and a transceiver of the calibrating device. The technical proposal is that: the device comprises: a calibration factor computation module which receives a downlink channel estimation matrix Hdown (k)' and an uplink channel estimation matrix Hup (k)' fed back from the other party, and calculates and outputs the calibration factors AAP (k) and AUE (k) according to Hup (k)'=AAP (k)x(Hdown (k)') <T>x(AUE (k)) -1, wherein the calibration factors AAP (k) and AUE (k) being both diagonal matrixes; a calibration factor memory module which receives and stores the two calibration factors AAP (k) and AUE (k); and a calibration receiving channel estimation matrix module which receives the downlink estimation matrix Hdown (k) requiring calibration, picks up the two calibration factors AAP (k) and AUE (k) from the calibration factor memory module, and works out and outputs a calibrated uplink estimation matrix Hup (k) according to Hup (k)=AAP (k)x(Hdown (k))<T>x(AUE (k)) -1. The invention is applicable to the wireless communication field.

Description

Calibration method and device for radio frequency path of time division duplex MIMO multi-antenna communication system technical field The present invention relates to a calibration method and device, in particular to a calibration method and device applied in a radio frequency path of a time division duplex (TDD) multiple-input multiple-output (MIMO) multi-antenna wireless communication system. Background technique As people's demand for data rate and quality of service in wireless communication continues to increase, a scheme using multiple antennas for transmission and reception (MIMO) is widely used. Increasing the number of antennas provides more spatial freedom, which can increase the data rate through spatial multiplexing, or improve the quality of service through increasing diversity. In order to make full use of the channel capacity of a multiple-input multiple-output (MIMO) multi-antenna communication system, the sender needs to understand the communication chann...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04Q7/34H04B7/04H04L27/26H04B17/00H04B17/12
Inventor 简相超施婷婷
Owner SPREADTRUM COMM (SHANGHAI) CO LTD
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