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Transceiver antenna calibration error-based multipoint coordinated robust pre-coding method

A technology of antenna calibration and multi-point coordination, which is applied to the shaping network in the transmitter/receiver, preventing/detecting errors through diversity reception, baseband system components, etc., and can solve the problem that the air interface calibration method is difficult to restore the uplink and downlink of the TDD system Problems such as channel reciprocity and system performance impact, to achieve the effect of high production difficulty, good system performance, and recovery of system performance loss

Inactive Publication Date: 2012-11-21
BEIHANG UNIV +1
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Problems solved by technology

However, in the actual system, when there are channel estimation errors and feedback errors, the air interface calibration method is still difficult to restore the reciprocity between the uplink and downlink channels of the TDD system, which will greatly affect the performance of the system

Method used

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  • Transceiver antenna calibration error-based multipoint coordinated robust pre-coding method
  • Transceiver antenna calibration error-based multipoint coordinated robust pre-coding method
  • Transceiver antenna calibration error-based multipoint coordinated robust pre-coding method

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Embodiment Construction

[0026] The multi-point cooperative robust precoding method based on the transceiver antenna calibration error proposed by the present invention has a flow chart as shown in figure 2 shown, including the following steps:

[0027] (1) Assuming a coordinated multi-point transmission system, including N c cooperative base stations and N U served users, all cooperative base stations have a total of N t Antennas, each served user has one antenna, set the downlink channel h between the i-th antenna of the cooperative base station and the j-th served user antenna D ij The uplink channel h between the j-th served user antenna and the i-th antenna of the cooperative base station U ij The relationship between where g ij is a random variable determined by the radio frequency link between the i-th antenna of the cooperative base station and the j-th served user antenna;

[0028] (2) According to N U training sequences sent by served users through the uplink, and the cooperative ...

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Abstract

The invention relates to a transceiver antenna calibration error-based multipoint coordinated robust pre-coding method, which belongs to the field of wireless communication technology, and comprises the following steps that: a coordinated base station obtains the statistical characteristics of a downlink channel between the coordinated base station and the served user according to the coordinatedbase station, a relationship between the uplink / downlink channels of the served user and the uplink channel, calculates the pre-coding vectors of all served users according to the statistical characteristics of the downlink channel, constructs an initial pre-coding matrix so as to obtain a final pre-coding matrix, and maps the original signals sent to all served users as transmitted signals according to the final pre-coding matrix. The method has the advantages of recovering the loss in system performance resulting from unsatisfactory antenna calibration, effectively reducing the system cost by reducing the requirement on calibration precision, and providing high system performance.

Description

technical field [0001] The present invention relates to a method for robust precoding of multi-point coordination based on transceiver antenna calibration error, in particular to downlink space division multiplexing transmission in time-division duplex (TDD) coordinated multi-point transmission (CoMP) system The multi-user robust transmit precoding method belongs to the technical field of wireless communication. Background technique [0002] With the continuous progress of society and the increase of people's needs, the future mobile communication system will pursue greater system capacity, better communication quality, longer operating distance, faster data rate and lower cost. Multi-antenna technology is widely adopted by existing wireless communication systems (eg, Long Term Evolution (LTE)) because it can improve transmission efficiency and spectrum utilization without increasing system bandwidth. In a mobile communication system, the use of full frequency reuse between...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/06H04L25/03
Inventor 韩圣千苏立焱杨晨阳王刚雷鸣
Owner BEIHANG UNIV
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