Consistency measuring device and method of reciprocity and synchronization of large-scale antenna array
A technology of large-scale antennas and antenna arrays, applied in the field of communication, can solve the problems of high hardware overhead, scalability that cannot meet the requirements of reciprocity calibration of large-scale MIMO arrays, location layout, and complex scale of feeder networks. The effect of production cost overhead, ease of standardized manufacturing, and ease of array expansion
Active Publication Date: 2015-10-14
SHANGHAI JIAO TONG UNIV
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In this invention, all RRH modules must be connected to an independent RRH inter-calibration module to complete the inter-RRH inter-module calibration. The disadvantage is that when the antenna array scale is large, the number of RRH modules is large, and the number of channels is large, each RRH Connecting to the public inter-RRH calibration module will consume a lot of hardware overhead, and the location layout between the RRH calibration module and the RRH, and the scale of the feeder network will also become complicated, and its scalability cannot meet the reciprocity calibration of large-scale MIMO arrays. needs
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[0049] The solution of the present invention will be described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are carried out on the premise of the technical solutions of the present invention, and detailed implementation methods and specific operation processes are provided, but the protection scope of the present invention is not limited to the following examples.
[0050] In this embodiment, a consistency measurement method and device for reciprocity and synchronization of a large-scale antenna array are given, and its specific structure is:
[0051] (1) if figure 1 As shown, in the overall architecture, according to the layout characteristics of large-scale antenna arrays that are usually decomposed into multiple sub-arrays (each sub-array contains several channels), measurement modules are added to each sub-array, and adjacent measurement modules are passed through The feeders are cascaded to form a closed loop.
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The invention discloses a consistency measuring device and method of the reciprocity and synchronization of a large-scale antenna array. The large-scale antenna array is decomposed into a plurality of sub-arrays; each sub-array includes a plurality of channels; each sub-array is connected into a sub-array measurement module; each sub-array is in cascaded connection with an adjacent front-stage measurement module or later-stage measurement module through feeders, so that a closed loop can be formed; and the sub-array measurement module includes a calibration channel, a plurality of couplers, a reference channel, a passage selector and a measuring unit, wherein the calibration channel is an additional channel, and transmits reference signals to the antenna array channels in the sub array through the couplers, or receive reference signals transmitted from the antenna array channels in the sub array through the couplers.
Description
technical field [0001] The invention belongs to the technical field of communication, and in particular relates to a consistency measuring device and method for the reciprocity and synchronization of a large-scale antenna array. Background technique [0002] In order to cope with more complex application environments, massive MIMO (Multiple-Input Multiple-Output) wireless communication systems can adopt long-distance and distributed arrays to meet the increasing transmission speed and user capacity requirements . In practical application, high requirements are also put forward for the reciprocity and synchronization between multiple channels; therefore, it is necessary to measure the consistency of reciprocity and synchronization between antenna array channels to complete the calibration . With the continuous increase of the channel scale and signal bandwidth of massive MIMO systems, the complexity of the calibration system also increases rapidly, and there are obvious bot...
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IPC IPC(8): H04B17/11H04B17/21H04W24/00H04W56/00
Inventor 宫新保杨晟罗笑雨臧小刚凌小峰
Owner SHANGHAI JIAO TONG UNIV