Large-scale digital array signal synchronous acquisition system

A digital array and signal synchronization technology, applied in the field of measurement and control, communication, can solve the sensitive problems of data converters, achieve reliable alignment, high reliability, and meet the needs of synchronous acquisition

Active Publication Date: 2020-12-08
10TH RES INST OF CETC
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Problems solved by technology

The performance of such systems depends on synchronous data arrays

Method used

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  • Large-scale digital array signal synchronous acquisition system
  • Large-scale digital array signal synchronous acquisition system
  • Large-scale digital array signal synchronous acquisition system

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Embodiment Construction

[0019] Such as figure 1 shown. A large-scale digital array receiving system usually includes three parts, the front end is sub-array group 1 to sub-array group m, each sub-array group contains n sub-arrays, the middle is the DBF processing pool, and the back-end is the baseband signal processing equipment. Each sub-array group directly selects a synchronous sampling analog-to-digital A / D converter connected with a high-speed serial interface with the JESD204B protocol at the acquisition end. Inter-array synchronization time trigger delay measurement module to detect phase relationship, delay search synchronization signal (sync) to effectively collect time period, use two-level clock distribution and delay measurement in each sub-array to realize the synchronization between sampling clock and synchronization signal (sync) Reliable alignment, adopting the optical fiber wavelength division multiplexing transmission method, weighting the digitized intermediate frequency signal to...

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Abstract

The invention discloses a large-scale digital array signal synchronous acquisition system, and aims to provide a synchronous acquisition system which is high in reliability, expandable in scale, highin synchronization precision, good in amplitude consistency and phase consistency, rapid and stable. According to the system, each sub-array group is directly connected with a synchronous sampling analog-to-digital (A/D) converter through a high-speed serial interface at a collection end, synchronous sampling of array signals is achieved, a delay measurement module is triggered to perform phase relation detection through inter-sub-array synchronous moments, effective collection moment periods of synchronous signals are searched in a delay mode. Reliable alignment of sampling clocks and synchronizing signals is achieved through two-stage clock distribution and delay measurement in each sub-array, reference clocks and digital multi-beam synchronizing signals between the sub-arrays are transmitted and distributed to a DBF processing pool through optical fibers, and the DBF processing pool completes beam data aggregation according to the array scale. And the multi-beam data forming the full array are sent to baseband signal processing equipment to realize measurement, control and communication.

Description

technical field [0001] The invention relates to the fields of measurement and control, communication and the like, in particular to a large-scale digital array signal synchronous acquisition system for synchronous acquisition of digital array signals. Background technique [0002] With the increase of measurement and control and communication distance, the complexity, power consumption and system cost of equipment are all increasing. Compared with various existing wireless communication technologies, massive antenna array (massive MIMO) is usually used. The large-scale antenna array is based on the principle of multi-user beamforming. Hundreds of antennas are arranged at the base station, and dozens of target receivers are modulated with their respective beams. Through spatial signal isolation, dozens of signals are simultaneously transmitted on the same frequency resource. . The large-scale antenna array greatly improves the network capacity, because there are a bunch of a...

Claims

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Application Information

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IPC IPC(8): H04J3/06H04B7/0413
CPCH04J3/0638H04J3/0682H04B7/0413Y02D30/70
Inventor 唐洪军张晓波孙亮邵永杰
Owner 10TH RES INST OF CETC
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