CN-119892127-B - Alternating optimization-based analog-digital hybrid array airspace anti-interference method

CN119892127BCN 119892127 BCN119892127 BCN 119892127BCN-119892127-B

Abstract

The specification discloses an alternating optimization-based analog-digital hybrid array airspace anti-interference method, which relates to the technical field of anti-interference and comprises the steps of constructing a first optimization problem based on a hybrid array antenna structure, a digital forming vector and an analog forming vector, solving the first optimization problem by adopting a quasi-Newton method to obtain an optimal beam weight vector, constructing a second optimization problem based on the optimal beam weight vector, the digital forming vector and the analog forming vector, and solving the second optimization problem by adopting an alternating optimization algorithm to obtain the optimal digital forming vector and the optimal analog forming vector so as to solve the problem that the traditional method adopting the analog-digital hybrid array anti-interference method is limited for receiving antenna array elements and has low anti-interference capability for high-mobility platform anti-interference scenes with more interference.

Inventors

YANG JIAN
Ni Yuanhan
SHANG JIADONG
WANG ZULIN
YANG KEXIN
JIA BUYUN
ZHANG QIANNAN

Assignees

北京遥感设备研究所

Dates

Publication Date: 20260508
Application Date: 20241231

Claims (10)

1. The alternating optimization-based analog-digital hybrid array airspace anti-interference method is characterized by comprising the following steps of: Constructing a first optimization problem based on the hybrid array antenna structure, the digital forming vector and the analog forming vector; solving a first optimization problem by adopting a quasi-Newton method to obtain an optimal beam weight vector; Constructing a second optimization problem based on the optimal beam weight vector, the digital forming vector and the analog forming vector; solving a second optimization problem by adopting an alternating optimization algorithm to obtain an optimal digital forming vector and an optimal analog forming vector; Step one, according to the anti-interference requirement and the characteristics of the hybrid array antenna, aiming at the array element number, the method comprises the following steps of The number of the radio frequency chains is Constructing a first optimization problem: (1) the number of the digital forming vectors is set, In order to simulate the shaping vector of the mold, A data matrix made up of a plurality of snapshots, For the channel vector corresponding to the communication signal, 、、 Channel gain, signal incidence angle and steering vector, The error of the channel information known to the receiving end, Representing a set of random errors; Is that Is limited by the hybrid antenna structure.
2. The method of claim 1, wherein constructing the first optimization problem based on the hybrid array antenna structure, the digitally formed vector, and the analog formed vector comprises constructing the first optimization problem based on the digitally formed vector, the analog formed vector, and a data matrix comprised of a plurality of snapshots, the digitally formed vector being related to a number of radio frequency chains of the hybrid array antenna, the analog formed vector being related to a number of radio frequency chains and a number of array elements of the hybrid array antenna.
3. The method of claim 2, wherein constructing a first optimization problem based on the hybrid array antenna structure, the digitally formed vector, and the analog formed vector further comprises constructing a first constraint based on the digitally formed vector, the analog formed vector, the channel vector of the channel signal, the channel information error at the receiving end, and the random error set.
4. The method of claim 3, wherein solving the first optimization problem using quasi-newton's method to obtain the optimal beam weight vector comprises: constructing a non-convex constraint based on the first constraint; Adopting a quasi-Newton method to relax non-convex constraint to solve a first optimization problem, and obtaining an iteration direction and an iteration step; And obtaining the optimal beam weight vector based on the quasi-Newton direction, the iterative stepping and the iterative threshold.
5. The method of claim 2, wherein the solving the first optimization problem using the quasi-newton method to relax the non-convex constraint, obtaining the iteration direction and the iteration step comprises: Converting the first optimization problem into a convex second-order cone planning problem based on non-convex constraint, and solving to obtain an iteration direction; based on the convex second-order cone programming problem, a one-dimensional linear search problem is obtained, and iterative stepping is obtained by solving.
6. The method of claim 1, wherein constructing the second optimization problem based on the optimal beam weight vector, the digital forming vector, and the analog forming vector comprises constructing the second optimization problem such that the reception performance of the digital forming vector and the analog forming vector approximates the optimal beam weight vector.
7. The method of claim 1, wherein solving the second optimization problem using an alternating optimization algorithm to obtain an optimal digital forming vector and an optimal analog forming vector comprises: Splitting the second optimization problem into a plurality of independent problems based on the number of radio frequency chains of the array antenna; and solving a plurality of independent problems by adopting an alternative optimization algorithm to obtain an optimal digital forming vector and an optimal analog forming vector.
8. The method of claim 7, wherein solving a plurality of independent problems using an alternating optimization algorithm to obtain an optimal digital forming vector and an optimal analog forming vector comprises: When the simulation forming vector is fixed, a digital forming vector solving formula is obtained based on a plurality of independent problems; when the digital forming vector is fixed, obtaining a simulation forming vector solving formula based on a plurality of independent problems; and carrying out iterative solution on the digital form vector solution formula and the analog form vector solution formula to obtain an optimal digital form vector and an optimal analog form vector.
9. An alternating optimization-based analog-digital hybrid array airspace anti-interference device is characterized by comprising: The first optimization problem construction module is used for constructing a first optimization problem based on the hybrid array antenna structure, the digital forming vector and the analog forming vector; The first optimization problem solving module is used for solving the first optimization problem by adopting a quasi-Newton method to obtain an optimal beam weight vector; The second optimization problem construction module is used for constructing a second optimization problem based on the optimal beam weight vector, the digital forming vector and the analog forming vector; The second optimization problem solving module is used for solving the second optimization problem by adopting an alternating optimization algorithm to obtain an optimal digital forming vector and an optimal analog forming vector; Step one, according to the anti-interference requirement and the characteristics of the hybrid array antenna, aiming at the array element number, the method comprises the following steps of The number of the radio frequency chains is Constructing a first optimization problem: (1) Wherein, the The number of the digital forming vectors is set, In order to simulate the shaping vector of the mold, A data matrix made up of a plurality of snapshots, For the channel vector corresponding to the communication signal, 、、 Channel gain, signal incidence angle and steering vector, For errors in the channel information known to the receiving end, Representing a set of random errors; Is that Is limited by the hybrid antenna structure.
10. An electronic device comprising a processor and a memory arranged to store computer executable instructions which, when executed, cause the processor to perform the steps of the method of any of claims 1 to 8.

Description

Alternating optimization-based analog-digital hybrid array airspace anti-interference method Technical Field The invention belongs to the technical field of anti-interference, and particularly relates to an alternating optimization-based analog-digital hybrid array airspace anti-interference method. Background In view of the difficulty in deployment of the all-digital array structure, the volume, the weight and the cost of the all-digital array structure are limited by a radio frequency chain, and the array antenna with the analog-digital hybrid structure is difficult to deploy in a large scale and is proposed and realized. The array antenna with the analog-digital hybrid structure is particularly suitable for being deployed on a high-mobility platform (such as an airplane, a missile and the like) with limited bearing capacity. For the airspace anti-interference of the analog-digital hybrid structure array antenna, the traditional airspace anti-interference algorithm points the analog wave beam to the communication signal direction, only digital wave beam forming is used for anti-interference, the degree of freedom of the analog wave beam forming is not used, and the degree of freedom of anti-interference is limited by the digital wave beam forming. Therefore, under the condition of multiple interferences, the anti-interference performance of the traditional hybrid array airspace anti-interference algorithm is seriously reduced, the advantages of the analog-digital hybrid structure array antenna are not exerted, and the analog-digital hybrid array receiving beamforming design method based on subspace interference suppression, which is proposed in 2022, is based on the beamforming design framework of the analog-digital hybrid array shown in fig. 1. However, the method still does not fully utilize the anti-interference capability of the analog beam, has high requirement on the space freedom degree of the array, and is difficult to be applied to the high-mobility platform anti-interference scene with limited array elements of the receiving antenna and large interference quantity. In summary, the existing method for designing the receive beam forming of the array antenna with the analog-digital hybrid structure is difficult to directly apply in the interference-resistant scene of the high-mobility platform with a limited array element of the receive antenna and a large amount of interference, and has serious restrictions on the interference resistance due to limited array space freedom. Therefore, the existing method for resisting interference by adopting an analog-digital hybrid array aims at the problems of low anti-interference capability of a high-mobility platform anti-interference scene with a limited array element of a receiving antenna and a large amount of interference. Disclosure of Invention The invention aims to provide an alternating optimization-based analog-digital hybrid array airspace anti-interference method, so as to solve the problem that the anti-interference capability of a high-mobility platform anti-interference scene with a large number of interferences is low due to the fact that the array elements of a receiving antenna are limited by the existing method for adopting the analog-digital hybrid array anti-interference. In order to achieve the above purpose, the invention adopts the following technical scheme: In one aspect, the present disclosure provides an alternating-optimized analog-to-digital hybrid array based spatial domain anti-interference method, comprising: step 102, constructing a first optimization problem based on a hybrid array antenna structure, a digital forming vector and an analog forming vector; step 104, solving a first optimization problem by adopting a quasi-Newton method to obtain an optimal beam weight vector; Step 106, constructing a second optimization problem based on the optimal beam weight vector, the digital forming vector and the analog forming vector; and step 108, solving a second optimization problem by adopting an alternative optimization algorithm to obtain an optimal digital forming vector and an optimal analog forming vector. In another aspect, the present disclosure provides an alternating-optimized analog-to-digital hybrid array airspace anti-interference device, including: The first optimization problem construction module is used for constructing a first optimization problem based on the hybrid array antenna structure, the digital forming vector and the analog forming vector; The first optimization problem solving module is used for solving the first optimization problem by adopting a quasi-Newton method to obtain an optimal beam weight vector; The second optimization problem construction module is used for constructing a second optimization problem based on the optimal beam weight vector, the digital forming vector and the analog forming vector; And the second optimization problem solving module is used for solving the second optimization prob