Switching beam forming-based millimeter wave cooperative communication method
A cooperative communication and beamforming technology, applied in wireless communication, network traffic/resource management, electrical components, etc., can solve problems such as weak ability to penetrate obstacles, communication interruption, communication process blocking, etc., to save beam training time , to ensure the effect of continuity
Inactive Publication Date: 2015-05-13
QINGDAO UNIV OF SCI & TECH
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Problems solved by technology
[0005] In order to solve the problem that the existing millimeter-wave frequency band wireless communication system has weak ability to penetrate obstacles and the occurrence of obstacles in the communication process will easily cause communication interruption, the present invention proposes a millimeter-wave cooperative communication method based on switching beamforming, which can solve the above-mentioned problems question
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Embodiment 1
[0027] Embodiment 1. This embodiment proposes a millimeter-wave cooperative communication method based on handover beamforming, such as figure 1 shown, including the following steps:
[0028] S1. Establish a beam training period for device interconnection in the network, and perform beam training on all devices in the network in turn to obtain the optimal beam pair when each device communicates with each other in pairs, and correspond to the optimal beam pair for each device to communicate with each other The weighted vector records of each antenna form a weighted vector table, and at the same time, use the optimal beam pair when the selected devices communicate with each other to measure the signal-to-noise ratio of the receiving end of each group of interconnected devices, and establish the SNR record table of the receiving end of the interconnected devices. The signal-to-noise ratio SNR recording table records the signal-to-noise ratios when each device is used as the recei...
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The invention discloses a switching beam forming-based millimeter wave cooperative communication method. The method comprises the following steps: performing beam training on all receiving and transmitting equipment provided with array antennas in a network to establish an equipment interconnection optimal beam weighted vector table; establishing a direct transmission link between transmission equipment S and receiving equipment D with communication request in the network to perform communication; detecting whether the current direct transmission link is obstructed and starting a link switching step when the obstruction occurs; searching an optimal beam weighted vector between the transmission equipment S and the best cooperative equipment R to adjust the corresponding array antenna to communicate respectively. According to the communication method, when the direct transmission link is obstructed, a weighted vector is read from the previously established equipment interconnection optimal beam weighted vector table to adjust the beam direction; thus the transmission of S-D transmission link is substituted into transmission of S-R-D two-jump transmission link, the transmission link switching can be quickly and stably realized, and the continuity of the data transmission is guaranteed.
Description
technical field [0001] The invention belongs to the technical field of millimeter wave communication, and in particular relates to a millimeter wave cooperative communication method based on switching beamforming. Background technique [0002] The use of spectrum resources in the radio low-frequency band has become more urgent, and the interference between various technologies in the same frequency band has become increasingly serious. Even if high-order modulation and multiplexing methods are used, it is difficult to meet the current needs of ultra-high-speed wireless transmission. In order to meet the growing demand for ultra-high-speed wireless transmission, it is necessary to develop new frequency bands with high bandwidth. Under this demand, the millimeter-wave wireless communication technology represented by the 60GHz frequency band came into being. Due to the broadband spectrum of several GHz and the transmission power up to 10W, it can be realized by low-cost CMOS de...
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IPC IPC(8): H04W28/18H04W36/18
Inventor 施威王景景张浩刘云牛秋娜董新利
Owner QINGDAO UNIV OF SCI & TECH