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Distributed type digital beam formation network and digital beam formation processing method

A digital beam, distributed technology, applied in the directions of space transmit diversity, diversity/multi-antenna systems, etc., can solve the problem of inability to provide hardware multipliers, and achieve fast computing speed, low cost, and reduced requirements and hardware design difficulties. Effect

Inactive Publication Date: 2010-12-29
SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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Problems solved by technology

However, when the phased array antenna has a large scale and needs to process many beams and array elements at the same time, even a large-scale FPGA cannot provide a large number of hardware multipliers to complete this operation (M*N complex hardware multipliers )
For example, a phased array antenna with 16 beams and 61 elements requires 976 complex hardware multipliers, and current mainstream FPGA suppliers such as Xilinx or Altera cannot provide such a large number of hardware multipliers

Method used

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  • Distributed type digital beam formation network and digital beam formation processing method
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  • Distributed type digital beam formation network and digital beam formation processing method

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Embodiment Construction

[0018] In order to make the purpose and features of the present invention more obvious and understandable, the specific implementation manners of the present invention will be further described below in conjunction with the accompanying drawings.

[0019] The core design idea of ​​the present invention comes from distributed algorithm (Distributed Arithmetic, DA). Distributed algorithms are suitable for multiply-accumulate operations with fixed coefficients. The basic design idea of ​​the distributed algorithm is described below.

[0020] Assume that N fixed coefficients c(n) are multiplied and accumulated with N input variables x(n) respectively, and the result obtained is y. Here c(n) is equivalent to the amplitude and phase adjustment weight of a certain channel, and x(n) is equivalent to the input signal of a certain beam, then

[0021] y = Σ n = 1 N c ...

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Abstract

The invention discloses a distributed type digital beam formation network which completes parallel multiply-accumulate operation by using memory resources to replace hardware multiplier resources according to a distributed algorithm, is especially suitable for hardware system framework with rich memory resources, such as a FPGA (Field Programmable Gate Array), and the like and also can be realized by configuration of a flash memory, and the like, and therefore, the invention greatly reduces the requirement of hardware resources and the difficulty of hardware design and uses lower cost to process complicated large-scale beam formation.

Description

technical field [0001] The present invention relates to the technical field of electronic communication, in particular to a distributed digital beamforming network and a digital beamforming processing method, which are used to realize parallel beamforming processing of large-scale phased array antennas with extremely high requirements for multiplying and accumulating operations. Background technique [0002] In the field of satellite communications, phased array technology has the advantages of high gain and large-angle dynamic scanning. Moreover, using the space diversity effect of the array antenna to achieve multi-beam coverage, combined with inter-beam frequency multiplexing and code division multiplexing, can greatly improve the user capacity of the satellite communication system. In many fields such as military reconnaissance and information early warning, the phased array antenna plays a great role. It can be used as the core component of the air force early warning a...

Claims

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Application Information

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IPC IPC(8): H04B7/06
Inventor 梁广龚文斌余金培刘会杰覃维引
Owner SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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