CN113688507B

CN113688507B - Optimal configuration and type selection method for amplifier of radio frequency link of superheterodyne receiver

Info

Publication number: CN113688507B
Application number: CN202110873515.2A
Authority: CN
Inventors: 邢君; 邓畅; 魏良桂; 孙彪; 王海江
Original assignee: 723 Research Institute of CSIC
Current assignee: 723 Research Institute of CSIC
Priority date: 2021-07-30
Filing date: 2021-07-30
Publication date: 2023-01-03
Anticipated expiration: 2041-07-30
Also published as: CN113688507A

Abstract

The invention provides an optimal configuration and model selection method for an amplifier of a radio frequency link of a superheterodyne receiver, which is used for generating an available amplifier model library; building a superheterodyne receiver radio frequency device model except an amplifier in System Vue software, wherein the superheterodyne receiver radio frequency device model comprises an amplitude limiter model, a filter model, a radio frequency switch model, a mixer model and a local vibration source model, and a radio frequency link left blank at the amplifier is obtained; setting simulation targets including frequencies, gains, noise coefficients, in-band flatness and dynamic ranges concerned by the receiver in Sysysyytem Vue; meanwhile, the blank part of the link amplifier is subjected to embeddable processing; writing a loop simulation program and a jump-out condition by applying MATLAB embedded System Vue; and after the program is popped out, reporting the grade and the model of the selected amplifier, giving a final simulation result of the corresponding requirement of the System Vue, and reporting the System index simultaneously if the System index is not finished by repeated iteration. The invention not only effectively improves the design efficiency and reduces the design risk, but also can quickly and accurately find out the optimal amplifier configuration and model.

Description

Optimal configuration and type selection method for amplifier of radio frequency link of superheterodyne receiver

Technical Field

The invention relates to a radio frequency simulation application technology, in particular to an optimal configuration and model selection method for an amplifier of a radio frequency link of a superheterodyne receiver.

Background

With the development of radio frequency chip technology, the superheterodyne receiver amplifier has a wide variety, and under the condition of determining a frequency conversion scheme, the selection types of devices except the amplifier are relatively specific, and the selection type and the layout of the amplifier determine main indexes of a radio frequency link of the receiver, such as a main gain, a linear dynamic range, a spurious-free dynamic range, a noise coefficient and the like. The current model selection method of the receiving link amplifier is greatly related to personal experience of designers, sometimes wastes time and labor and finally obtains links through data lookup and screening, and is not the optimal layout of a radio frequency link.

With the progress of simulation tools and technologies, the digital virtual prototype in the design field of telecommunication systems such as communication, radar and the like is greatly developed. In the research of the digital virtual prototype, the fact that if the virtual prototype is constructed, the part where the amplifier is located is used as a candidate, and the data continuously brought into an amplifier library participates in simulation, can rapidly obtain the distribution and the selective sizing of the optimized amplifier, and provides a convenient and rapid solution for the design of a radio frequency link of a receiver. Therefore, the invention provides an optimal configuration and model selection method for an amplifier of a radio frequency link of a superheterodyne receiver based on simulation.

Disclosure of Invention

The invention aims to provide an optimal configuration and a type selection method for an amplifier of a radio frequency link of a superheterodyne receiver.

The technical solution for realizing the purpose of the invention is as follows: an optimal configuration and type selection method for an amplifier of a radio frequency link of a superheterodyne receiver comprises the following steps:

firstly, generating an available amplifier model library, wherein amplifier parameters are provided by a chip manufacturer or obtained by direct physical X parameter test;

secondly, building a superheterodyne receiver radio frequency device model except the amplifier in System Vue software, wherein the superheterodyne receiver radio frequency device model comprises an amplitude limiter model, a filter model, a radio frequency switch model, a mixer model and a local vibration source model, and obtaining a radio frequency link left blank at the amplifier;

thirdly, setting a simulation target in Sysysysysyytem Vue, wherein the simulation target comprises frequency, gain, noise coefficient, in-band flatness, dynamic range and spurious-free dynamic range concerned by a receiver; meanwhile, the blank part of the link amplifier is subjected to embeddable processing;

fourthly, writing a cyclic simulation program and a jump-out condition by applying an MATLAB embedded system Vue, wherein the cyclic simulation program adjusts the model number and the stage number of the amplifier, calculates the frequency, the gain, the noise coefficient, the in-band flatness and the dynamic range of the receiver, and the jump-out condition is that a simulation target is met;

and fifthly, jumping out of the program, reporting the grade and the model of the selected amplifier, giving a final simulation result of the corresponding requirement of the System Vue, and reporting the System index if the System index is not finished by repeated iteration.

Further, in the amplifier model library, products are sorted by frequency and sorted by gain.

Furthermore, index priority is designed, and amplifier models in the library are sequentially selected according to the priority.

Further, the radio frequency link of the superheterodyne receiver is first-order mixing and second-order mixing.

Further, simulation is performed in the order of cascade from one stage to two stages to three stages of the amplifier.

The optimal configuration and the type selection of the amplifier of the radio frequency link of the superheterodyne receiver are realized based on the optimal configuration and the type selection method of the amplifier.

A computer device comprises a memory, a processor and a computer program which is stored on the memory and can run on the processor, wherein when the processor executes the computer program, the optimal configuration and the type selection of an amplifier of a radio frequency link of a superheterodyne receiver are realized based on the optimal configuration and the type selection method of the amplifier.

A computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements optimal configuration and selection of amplifiers for a radio frequency link of a superheterodyne receiver based on the optimal configuration and selection method of amplifiers.

Compared with the prior art, the invention has the following remarkable advantages: the invention has certain efficiency advantage compared with the traditional manual self-selection and has stronger accuracy, and can realize the optimal configuration of the amplifier of the product to the maximum extent.

Drawings

Fig. 1 is a flow chart of an optimal configuration and a model selection method for an amplifier of a radio frequency link of a superheterodyne receiver according to the present invention.

Fig. 2 is a loop determination flowchart.

Fig. 3 is a layout diagram of two common rf devices of a superheterodyne receiver.

Fig. 4 is a diagram of the location of the amplifier selection.

Fig. 5 is a flow chart of an amplifier configuration method.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of and not restrictive on the broad application.

An optimal configuration and type selection method for an amplifier of a radio frequency link of a superheterodyne receiver comprises the following steps:

firstly, generating an available amplifier model library, wherein the amplifier parameters are provided by a chip manufacturer or obtained by direct physical X parameter test. In a preferred embodiment, the amplifier model library classifies the products of the common manufacturers according to frequency and sorts the products according to gain in a document. In addition, index priority can be designed, amplifier models in the library are sequentially selected according to the priority, and the number of iteration times of system simulation extraction can be reduced.

Secondly, building a superheterodyne receiver radio frequency device model except for the amplifier in System Vue software, wherein the superheterodyne receiver radio frequency device model comprises an amplitude limiter model, a filter model, a radio frequency switch model, a mixer model and a local vibration source model, and obtaining a radio frequency link left blank at the amplifier; . Commonly used radio frequency links are first order mixing and second order mixing, see fig. 3. The frequency mixer can be modeled according to X parameters obtained by a real object test, or can be modeled according to a simulation file formed by building a triode. The filter is a linear device, so that the modeling can be carried out according to S parameters obtained by simulation design or physical test. The local vibration source is directly assigned and modeled in System Vue software. And the radio frequency switch is modeled according to the X parameters obtained by the physical test. And finally obtaining all transmitter models of the radio frequency link of the integral superheterodyne receiver except the amplifier, and building the radio frequency link, wherein the amplifier is left blank.

As an example, the modeling method of the partial module is as follows. A filter: and scanning the excitation power, and selecting a test result with small jitter for modeling. The S-parameter at 0dBm excitation was used as a behavior model. A switch: and scanning the excitation power, and selecting a test result with small jitter for modeling. The S-parameter at 0dBm excitation was used as a behavior model. An attenuator: the signal of 0dBm is used as excitation, the attenuation of a vector network analyzer receiver is 0dB, the intermediate frequency bandwidth is reduced, and the jitter of an S parameter test result under a high attenuation value is reduced as much as possible. An amplifier: the excitation power was swept from the small signal area to the 1dB compression point at +10 dBm. And testing the power-related S parameter and extracting the S parameter into an S2d model. A mixer: according to the working type of the mixer, the frequency and the power of the LO end and the RF end are scanned, and different harmonics and intermodulation product power of the IF are read. The above data are used to generate an IMT model.

Thirdly, setting a simulation target in Sysysysysysyytem Vue, wherein the simulation target comprises frequency, gain, noise coefficient, in-band flatness, dynamic range and spurious-free dynamic range concerned by a receiver; meanwhile, the margin of the link amplifier is subjected to embeddable processing, so that the whole link can be completely supplemented in a file calling mode, and a model file to be simulated is formed.

And fourthly, writing a cyclic simulation program and a jump-out condition by applying an MATLAB embedded system Vue, wherein the cyclic simulation program adjusts the model number and the stage number of the amplifier, calculates the frequency, the gain, the noise coefficient, the in-band flatness and the dynamic range of the receiver, the jump-out condition is to meet the simulation target, the stage number of the amplifier is connected in series from one stage to two stages to three stages along with the simulation, and the like, and finally the effect of meeting the requirement is achieved.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. An optimal configuration and type selection method for an amplifier of a radio frequency link of a superheterodyne receiver is characterized by comprising the following steps of:

firstly, generating an available amplifier model library, wherein the amplifier parameters are provided by a chip manufacturer or obtained by direct physical X parameter test;

secondly, building a superheterodyne receiver radio frequency device model except for the amplifier in System Vue software, wherein the superheterodyne receiver radio frequency device model comprises an amplitude limiter model, a filter model, a radio frequency switch model, a mixer model and a local vibration source model, and obtaining a radio frequency link left blank at the amplifier;

thirdly, setting a simulation target in Sysysysyytem Vue, wherein the simulation target comprises frequency, gain, noise coefficient, in-band flatness and dynamic range concerned by a receiver; meanwhile, the white part of the link amplifier is subjected to embeddable processing;

fourthly, writing a cyclic simulation program and a jump-out condition by applying an MATLAB embedded system Vue, wherein the cyclic simulation program adjusts the model number and the stage number of the amplifier, calculates the frequency, the gain, the noise coefficient, the in-band flatness, the dynamic range and the spurious-free dynamic range of the receiver, and the jump-out condition is that a simulation target is met;

2. The method of claim 1, wherein products in the amplifier model library are sorted by frequency and sorted by gain.

3. The method of claim 1, wherein index priorities are designed and the amplifier models in the library are sequentially selected according to the priorities.

4. The method for optimal configuration and model selection of amplifiers for a superheterodyne receiver radio-frequency link of claim 1, wherein the superheterodyne receiver radio-frequency link is one-order mixing and two-order mixing.

5. The optimal configuration and selection method for amplifiers of a radio frequency link of a superheterodyne receiver as recited in claim 1, wherein the simulation is performed in a cascade order of amplifier stages from one stage to two stages to three stages.

6. An optimal configuration and type selection system for an amplifier of a radio frequency link of a superheterodyne receiver is characterized in that the optimal configuration and type selection of the amplifier of the radio frequency link of the superheterodyne receiver is realized based on the optimal configuration and type selection method for the amplifier of any one of claims 1 to 5.

7. A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the optimal configuration and selection of amplifiers for a radio frequency link of a superheterodyne receiver based on the optimal configuration and selection method of amplifiers as claimed in any one of claims 1 to 5 when executing the computer program.

8. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, implements an optimal configuration and selection of amplifiers for a radio frequency link of a superheterodyne receiver, based on the optimal configuration and selection method of amplifiers as claimed in any one of claims 1 to 5.