Method and device for multi-cell pilot frequency combined channel estimation

Abstract

The invention provides a method and a device for multi-cell pilot frequency combined channel estimation. The method for multi-cell pilot frequency combined channel estimation includes that: frequency domain pilot frequency signals are extracted by a base station from uplink signals received by terminals; a multi-cell multi-terminal local pilot frequency sequence, which is with time offset and used in coordinated multi-point transmission, is reconstructed by the base station according to the frequency domain pilot frequency signals; and multi-cell multi-terminal combined channel estimation is carried out for the frequency domain pilot frequency signals by the base station according to the local pilot frequency sequence to obtain channel estimation results of the pilot frequency signals of all the terminals. With the method and the device for multi-cell pilot frequency combined channel estimation, interference rejection capability under time offset is enhanced, requirements for scheduling are lowered, and computation complexity is decreased.

Description

technical field [0001] The present invention relates to the field of wireless communication, in particular to a method and device for multi-cell pilot joint channel estimation. Background technique [0002] With the development and wide application of wireless communication technology, people's requirements for future communication are constantly increasing. How to better improve the coverage of high-speed data rates and improve the transmission quality and throughput at the edge of the cell has become a subject of competing research. CoMP (Coordinated Multi-Point, coordinated multi-point) can effectively solve these problems by using the technology of multi-point joint transmission and reception, thereby improving the capacity and reliability of the wireless link. Therefore, the CoMP technology is introduced into the LTE-A (Long Term Evolution-Advanced, Advanced Long Term Evolution) system as a key technology. [0003] Under uplink CoMP, multiple base stations may receive ...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a method and device for multi-cell pilot joint channel estimation, which can enhance the ability to suppress interference under large time shifts, reduce the requirements for scheduling and reduce computational complexity, and overcome the inapplicability of existing technologies In the case of large time deviation, poor interference suppression ability, high scheduling requirements and high computational complexity

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