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

A technology for a wireless communication system and a calibration device, applied in the field of calibration methods and devices, can solve problems such as the destruction of the transposition correspondence relationship and the inconsistent radio frequency paths of the transceivers.

Active Publication Date: 2011-11-16
SPREADTRUM COMM (SHANGHAI) CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0005] 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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Embodiment Construction

[0084] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0085] The following embodiments are introduced by taking a mobile station as an example, and those skilled in the art should understand that various embodiments of the present invention can also be applied to a base station. figure 1 A preferred embodiment of the transceiver provided with the calibration device of the present invention is shown. The transceiver has N antennas and radio frequency receiving and transmitting paths. The mobile station receives the downlink signal sent by the base station through all the antennas 21-2N, performs channel estimation according to the pilot frequency in the signal, and receives and detects it. In the uplink, the mobile station can transmit on all antennas simultaneously, or select one or more antennas with better channel conditions to transmit data.

[0086] Corresponding to the antenna 21, there are mainly t...

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Abstract

The invention discloses a calibrating device for a radio frequency circuit of a time division duplexing MIMO multi-antenna communication system, 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)*(Hdown (k)') <T>*(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)*(Hdown (k))<T>*(AUE (k)) -1. The invention is applicable to the wireless communication field.

Description

technical field [0001] 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 [0002] 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 channel conditions in order to select an appropriate communication method, such as beamforming and layered com...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W72/00H04B17/12
Inventor 简相超施婷婷
Owner SPREADTRUM COMM (SHANGHAI) CO LTD
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