Pre-coding matrix determining method, related equipment and communication system

Abstract

The invention discloses a pre-coding matrix determining method, related equipment and a communication system. The pre-coding matrix determining method can comprise the following steps: a wireless coordinated transmission point acquires a first signal propagation time delay between terminal equipment and the wireless coordinated transmission point and first downlink channel state information estimates, corresponding to the terminal equipment, of N resources according to an uplink reference signal sent by the terminal equipment; X resources scheduled to the terminal equipment are determined according to the first downlink channel state information estimates, corresponding to the terminal equipment, of the N resources; a first pre-coding matrix corresponding to each of the X resources is generated according to the first downlink channel state information estimate, corresponding to the terminal equipment, of the resource; the time delay difference between the first signal propagation time delay and a reference propagation time delay is acquired; and carrying out time delay difference compensation on the generated first pre-coding matrixes respectively corresponding to all the X resources by making use of the time delay difference. The scheme of the embodiment of the invention is conducive to improvement of transmission performance of multi-point coordination.

Description

technical field [0001] The present invention relates to the technical field of communication, in particular to a method for determining a precoding matrix, related equipment and a communication system. Background technique [0002] In order to improve coverage for cell edge users, further increase system capacity, especially improve edge user transmission capabilities, research on Coordinated Multiple Point (CoMP, Coordinated multiple point) technology has been launched in the industry. Through sufficient research and demonstration, the CoMP technology is ready to be formally introduced into the LTE standardization work as an important key technology supporting the subsequent evolution of the Long Term Evolution (LTE, Long Term Evolution) system. [0003] The core idea of ​​CoMP is to use multiple geographically adjacent wireless transmission points to provide data transmission for a specific terminal device cooperatively or to receive and process data from a specific termin...

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Problems solved by technology

[0004] Since the CoMP technology needs to utilize multiple wireless cooperative transmission points separated geographically, and the distances from terminal devices to different wireless cooperative transmission points may vary, therefore, even if clock synchronization is achieved among all wireless transmission points, the There may still be differences in the time it takes for the data sent by the wireless transmission point to reach the terminal device

However, the existing Time Division Duplexing (TDD, Time Division Duplexing) system does not effectively solve the problem of transmission delay difference between wireless cooperative transmission points, which affects the performance of multi-point coordination to a certain extent.

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