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Method, device and base station for beamforming

A beamforming and base station technology, applied in baseband systems, baseband system components, space transmit diversity, etc., can solve problems such as unreachable and unguaranteed beamforming, and achieve the effect of improving accuracy, performance and capacity

Inactive Publication Date: 2016-03-30
ZTE CORP
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Problems solved by technology

[0011] The disadvantage of this beamforming method is that all subcarriers of each downlink user share the same set of beamforming weights, and for subcarriers in different clusters, it cannot be guaranteed that the beamforming weights are optimal. Optimal solution, so downlink beamforming may not be able to achieve ideal results

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  • Method, device and base station for beamforming
  • Method, device and base station for beamforming
  • Method, device and base station for beamforming

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Embodiment approach

[0065] Assume that the channel estimate sequence of the uplink channel is h s express, calculate h s The specific implementation method is as follows:

[0066] by the formula h s = r s / s s To calculate the channel estimate sequence; in the above formula:

[0067] h s is the sequence of channel estimation values;

[0068] r s is the sounding signal sequence received by the antenna and sent through the uplink channel;

[0069] S s The base station obtains the sounding signal sequence according to the MAC message sent by the user.

[0070] It is easy to imagine that the algorithm for estimating the uplink channel in the above step S101 may also use other methods for estimating the uplink channel.

[0071] In the embodiment of the present invention, beamforming is performed on the downlink subcarriers (including pilot subcarriers and data subcarriers) using the estimation results of the uplink channel. Unlike the prior art, the embodiment of the present invention uses P...

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Abstract

A beamforming method and device are disclosed in the present invention. The method includes: in the Time Division Duplex(TDD) system, according to sounding signal sequences transmitted via the uplink channels and received by the antenna, calculating channel estimation value sequences of uplink channels(101); for every downlink cluster using Partially Used Sub-carrier Channel(PUSC) sub-carrier mapping mode, according to the corresponding relationship between the physical position of every sub-carrier in the cluster and the sounding signal sequence, determining the channel estimation value corresponding to every sub-carrier in the cluster in the channel estimation value sequences(102); according to the channel estimation value corresponding to every sub-carrier in the cluster, calculating the beamforming weight value of the cluster(103); performing beamforming processing for all the sub-carriers in the cluster using the beamforming weight value of the cluster(104). In the present invention, for the sub-carriers of different clusters, the optimum beamforming weight value is used in beamforming processing respectively, thus the beamforming precision is improved, so that the system performance and capacity are improved.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a beam forming method, device and base station. Background technique [0002] In a multi-antenna wireless communication system, beamforming technology can be used to improve system performance. Beamforming technology is a smart antenna technology. It uses the beamforming algorithm to determine the way the base station transmits downlink signals to users, so that the base station can obtain higher signal power for the user terminal through a smaller total transmission power. level, thereby obtaining a higher signal-to-noise ratio. [0003] Eigenvalue Based Beamforming (EBB) is a commonly used beamforming technique. It obtains the spatial correlation matrix according to the channel characteristic parameters, and decomposes the eigenvalue of the spatial correlation matrix to obtain the weighted vector of the downlink data. This method mainly uses the recipr...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/08H04L25/02
CPCH04L25/03343H04B7/0617H04L2025/03777
Inventor 刘宜佳吴昊
Owner ZTE CORP