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Broadband beam forming design method for lowering hardware resource consumption

A design method and technology of hardware resources, applied in diversity/multi-antenna systems, space transmit diversity, etc., can solve the problems of multiple resources, consumption, hardware resources consumption, etc., and achieve the effect of saving resources

Active Publication Date: 2017-02-15
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The fractional delay FARROW structure used in broadband beamforming itself will consume a lot of hardware resources. The received array signal becomes a two-way I / Q signal to represent a complex signal, and then through FARROW, it will consume more resources.

Method used

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  • Broadband beam forming design method for lowering hardware resource consumption
  • Broadband beam forming design method for lowering hardware resource consumption
  • Broadband beam forming design method for lowering hardware resource consumption

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Embodiment 1

[0045] The invention achieves reduction of hardware resource consumption through a new method, and at the same time ensures that the result of broadband beam forming is consistent with that of the traditional method. as attached figure 2 Shown is a schematic diagram of a uniform linear array. The uniform linear array composed of M=36 array elements receives a broadband signal emitted by a far-field signal source. The far-field signal source is LFM (Linear Frequency Modulation) signal, denoted as in, ω s =2πf s . Denote the direction of the beamforming as θ 1 =30°,

[0046] details as follows:

[0047] ①. For a uniform linear array with 36 array elements, establish a signal receiving model. The coordinates of the mth array element represent p m =[x m 0 0]=[(m-1)λ / 2 0 0], λ is the signal wavelength, and λ=cf 0 . The array element spacing is set to half the signal wavelength, so x m =(m-1)λ / 2. Select the coordinate origin as the reference point, which is also ...

Embodiment 2

[0056] Another embodiment of the present invention is to verify that the present invention can reduce resources by half while obtaining the same beamforming effect through a uniform area array. as attached Figure 4 The schematic diagram shows a uniform planar array, which is composed of M×N=144 array elements, where M=12, N=12. The area array receives a broadband signal emitted by a far-field source. The far-field signal source is LFM (Linear Frequency Modulation) signal, denoted as in, ω s =2πf s . Denote the direction of the beamforming as θ 1 =20°,

[0057] details as follows:

[0058] ①. Establish a signal receiving model for a uniform area array with M×N array elements, where M=12, N=12. The coordinates of the mnth array element represent p m,n =[x m the y n 0]=[(m-1)λ / 2 (n-1)λ / 2 0], λ is the signal wavelength, and λ=cf 0 . Between rows and columns, the element spacing is set to half the signal wavelength, x m =(m-1)λ / 2,y n =(n-1)λ / 2. Select the co...

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Abstract

The invention belongs to the beam forming field in the array signal processing, and mainly relates to a method of analyzing and lowering resource consumption of hardware for the broadband beam forming. The invention aims at providing a broadband beam forming design method for lowering the hardware resource consumption, the method is realized completely aiming at the hardware engineering, and the resource consumed by the system can be lowered while realizing the broadband beam forming. The complex operation processing used in the traditional broadband beam forming is rejected, and the operation is performed on the real number. The received real number signal is directly processed without firstly performing the digital down-conversion to convert the received real signal into I / Q two paths. Therefore, the resource consumed by a FARROW structure when forming the broadband bean forming can be reduced, and then the real signal is converted into the complex signal; the phase ambiguity problem of the real signal can be avoided, and the influence on the subsequent signal processing is avoided.

Description

technical field [0001] The invention belongs to the field of beam synthesis in array signal processing, and mainly relates to hardware implementation resource consumption analysis of broadband beam formation and a method for reducing it. Background technique [0002] In the traditional array signal processing technology, taking a uniform linear array as an example, it can be known that the signal received by each array element in an array of M array elements is: [0003] [0004] For narrowband signals s(n)≈s(n-τ m ), the received signal of each array element can be changed to Define the space phase φ=ω s τ=2πf 0 dsinθ / c=2πdsinθ / λ. Write an array signal in matrix form: [0005] [0006] Define column vector x(n)=[x 0 (n)x 1 (n) … x M-1 (n)] Τ , a(θ)=[1 e -jφ … e -j(M-1)φ ] Τ . The array reception formula can be transformed into [0007] The process of narrowband beamforming can be understood as, the phase compensation introduced by the signal carrier ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/06
Inventor 黄文龙袁晓垒甘露廖红舒
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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