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Pilot signal sending and channel estimation method

A pilot signal and channel estimation technology, which is applied in the field of pilot signal transmission and channel estimation, can solve problems such as user experience degradation and pilot pollution, and achieve the effect of reducing expenses and suppressing interference

Inactive Publication Date: 2014-08-27
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

[0004] Aiming at the deficiencies of the prior art, the present invention proposes a method for pilot transmission and channel estimation in a large-scale multiple input multiple output (MIMO) time division duplex (Time Division Duplexing, TDD) wireless system. The method can effectively solve the above-mentioned multi-cell multi-user interference problem, fundamentally solve the user experience degradation and throughput saturation effect caused by pilot pollution and other problems, significantly improve user experience and increase system throughput

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  • Pilot signal sending and channel estimation method

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Embodiment Construction

[0031] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0032] The present invention provides a pilot signal transmission and channel estimation method under massive MIMO TDD wireless system, specifically, including the following steps:

[0033] (1) Update channel information between base stations of adjacent cells:

[0034] Each base station estimates the channel between itself and the base station when the base station in the adjacent cell sends t...

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Abstract

The invention discloses a pilot signal sending and channel estimation method under a large-scale MIMO TDD wireless system. The method includes the steps that (1) channel information between base stations of adjacent cells is updated; (2) all adjacent cell users send pilot signals to the respective base stations in an interlaced mode; (3) the base stations conduct channel estimation on the users of the cells according to the channel information between the base stations and the pilot signals received from the users of the cells; (4) services are provided for the users according to channel estimation results, and the step (1) is executed again when the time period is reached. By means of the pilot signal sending and channel estimation method, the user experience degradation and throughput saturation effect caused by the problems such as pilot pollution can be eliminated fundamentally, the user experience is improved obviously, and the system throughput is increased.

Description

technical field [0001] The invention belongs to the field of multi-antenna and wireless communication technologies, and more specifically relates to a pilot signal transmission and channel estimation method. Background technique [0002] Multi-antenna wireless cellular network design has been applied in some modern wireless systems, this technology not only improves the throughput but also can provide high quality service for a large number of users. However, with the rapid growth of users, the internal cell interference in the wireless system has restricted the improvement of the transmission rate. The emergence of massive MIMO technology can alleviate such problems and further improve the throughput of the system. [0003] However, in the face of existing cellular systems, the interference of multiple cells and multiple users is a major constraint on system performance. Currently, many methods are proposed in the industry, some of which include some form of adjustment to ...

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Application Information

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IPC IPC(8): H04L25/02H04L5/00H04B7/04
Inventor 屈代明姚天骐江涛
Owner HUAZHONG UNIV OF SCI & TECH
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