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Cooperative transmission method based on united beam forming

A technology of joint beamforming and coordinated transmission, applied in the field of communication, can solve the problem of inability to configure MIMO antennas, and achieve the effect of improving system throughput, increasing transmission distance, and long-distance transmission goals

Inactive Publication Date: 2015-04-08
天元瑞信通信技术股份有限公司
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Cooperative transmission technology can form a virtual MIMO system to solve the problem that the transmitter cannot be configured with MIMO antennas due to size, hardware, and complexity constraints. Array antenna beamforming technology can achieve low power consumption and long-distance transmission. MIMO Precoding technology can achieve the goal of broadband transmission

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  • Cooperative transmission method based on united beam forming
  • Cooperative transmission method based on united beam forming
  • Cooperative transmission method based on united beam forming

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Embodiment Construction

[0030] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0031] Reference attached figure 2 In the system block diagram of the embodiment of the present invention, there are two cooperative relay nodes in the system, namely Tx1 and Tx2, and one receiving node Rx, S 1 Is the data sent by Tx1 to Rx, S 2 It is the data sent by Tx2 to Rx. Tx1 and Tx2 deploy array antennas, and Rx deploy MIMO antennas.

[0032] Reference attached figure 1 The specific steps implemented by the present invention will be described in detail.

[0033] Step 1, omnidirectional channel estimation.

[0034] Each sending node in the system uses the channel estimation technology based on the training sequence to obtain the omnidirectional channel state information between the sending node and the receiving node. According to the omnidirectional channel state information between each sending node and the receiving node, the communication system adopts an...

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Abstract

The invention discloses a cooperative transmission method based on united beam forming. The method comprises the following steps of: (1) estimating an all-dimensional channel; (2) generating directional beams; (3) estimating a directional channel; (4) exchanging information; (5) generating virtual beams; (6) transmitting data; and (7) decoding at a receiving end. By the method, array gains, multiplexing gains or diversity gains brought by a multi-input multi-output (MIMO) system can be acquired under the condition that a transmitting node is limited by size, hardware and complexity; the throughput of the system can be greatly improved on the premise that bandwidth and power are not increased; an aim of broadband transmission is fulfilled; and on the premise that the power of the transmitting node is limited, the transmitting power can be reduced, the transmission distance is prolonged, and a long-distance transmission aim with low power consumption is fulfilled.

Description

Technical field [0001] The present invention belongs to the field of communication technology, and further relates to a cooperative transmission method based on joint beamforming, which can realize high-efficiency transmission of a wireless communication system and achieve the purposes of low power consumption, long-distance and broadband transmission. Background technique [0002] The Multiple Input Multiple Output (MIMO) system can obtain spatial diversity or multiplexing gain by configuring multiple antennas at the transceiver end, which significantly improves the system's anti-fading ability or spectrum efficiency. MIMO beamforming is also called MIMO precoding technology, which can use channel state information to preprocess the transmitted symbols at the transmitting end to increase system capacity or reduce system error rate. Precoding algorithms mainly include: channel singular value decomposition and channel geometric mean value decomposition based precoding algorithms, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/06H04L25/02H04B7/06
CPCY02D30/70
Inventor 赵力强张海林孟凯凯刘龙伟李宝良余智
Owner 天元瑞信通信技术股份有限公司
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