CN213043669U

CN213043669U - Radio frequency resource management module

Info

Publication number: CN213043669U
Application number: CN202021291103.5U
Authority: CN
Inventors: 张雨农; 李力; 周君琪; 张海辉
Original assignee: China Aeronautical Radio Electronics Research Institute
Current assignee: China Aeronautical Radio Electronics Research Institute
Priority date: 2020-07-02
Filing date: 2020-07-02
Publication date: 2021-04-23
Anticipated expiration: 2030-07-02

Abstract

The utility model discloses a radio frequency resource management module, including control and processing circuit, power supply circuit, clock circuit, interface circuit, analog-to-digital conversion circuit and digital-to-analog conversion circuit, wherein control and processing circuit are used for producing the control command of radio frequency resource, accomplish digital signal processing functions such as code, decoding, modulation, demodulation simultaneously, provide the reference clock for digital-to-analog conversion circuit, clock circuit provides the local oscillator clock for control and processing circuit, and interface circuit utilizes driver chip input and output module's control signal, can have the difference signal of RS422 level with partial single-ended output signal conversion simultaneously, and analog-to-digital conversion circuit receives outside low frequency analog signal and converts digital signal into digital signal, and digital-to-analog conversion circuit will be by the digital signal conversion that control and processing circuit produced into analog signal.

Description

Radio frequency resource management module

[ technical field ] A method for producing a semiconductor device

The utility model belongs to the wireless communication field is particularly useful for the radio frequency resource management module of radio frequency front end circuit.

[ background of the invention ]

With the development of avionics technology, the position of radio sensors and devices in avionics equipment is becoming increasingly important. The radio frequency transceiver circuit as the core part of the radio equipment is also more complicated, and often includes tens of specifications of important devices such as a controllable radio frequency amplifier, a numerical control attenuator, a frequency synthesizer, a filter bank, an analog-to-digital converter and a digital-to-analog converter, and how to make the radio equipment meet the design requirements of functions and performance through the precise control of radio frequency resources is always a significant problem. At the same time, software radio technology has gained widespread use in avionics radio systems, which accomplishes different functional deployments by loading different software on standardized, modular universal radio frequency and digital platforms. This technique also places more stringent requirements on the control and management of the radio frequency resources.

[ Utility model ] content

An object of the utility model is to provide a radio frequency resource management module for solve among the prior art unable accurate control through the radio frequency resource and make radio equipment satisfy the problem of the design requirement in the aspect of function and the performance.

In order to achieve the above object, implement the utility model discloses a radio frequency resource management module is including control and processing circuit, power supply circuit, clock circuit, interface circuit, analog-to-digital conversion circuit and digital-to-analog conversion circuit, wherein control and processing circuit are used for producing the control command of radio frequency resource, accomplish digital signal processing functions such as code, decoding, modulation, demodulation simultaneously, provide the reference clock for digital-to-analog conversion circuit, clock circuit provides the local oscillator clock for control and processing circuit, and interface circuit utilizes driver chip input and output module's control signal, can have the difference signal of RS422 level with partial single-ended output signal conversion simultaneously, and analog-to-digital conversion circuit receives outside low frequency analog signal and converts digital signal into digital signal, and digital-to-analog conversion circuit will be converted into analog signal by the digital signal that control and processing circuit produced.

According to the main characteristics, the core device of the control and processing circuit is FPGA, and the peripheral circuit comprises a JTAG interface circuit and a power supply filter circuit.

The power supply circuit uses 4 DC-DC chips with the maximum output current of 4A to convert the 3.3V direct current voltage input by the radio frequency resource management module into stable 3.3V, 2.5V, 1.8V and 1.2V digital and analog voltages.

The analog-digital conversion circuit comprises a DAC chip, a clock equalization circuit, a power supply filter circuit, an output matching circuit and a filter circuit, the FPGA of the control and processing circuit provides a reference clock for the digital-analog conversion circuit, the reference clock is input into the DAC chip through the clock equalization circuit, and digital signals needing digital-analog conversion are generated by the FPGA and are converted into analog signals by the DAC chip.

The digital-to-analog conversion circuit comprises three paths of AD conversion sub-circuits with 12-bit resolution and 3Msps sampling rate, simultaneously converts 3 analog signals and inputs digital signals to the control and processing circuit.

The interface driving circuit comprises SPI, RS422, RS232, RS485 bus driving chips and peripheral circuits thereof.

Compared with the prior art, the module for accurately managing and controlling various device resources in the radio frequency front-end circuit is effectively improved, and the control problem of the work and debugging of the radio frequency module in the scene can be comprehensively solved.

[ description of the drawings ]

Fig. 1 is a schematic diagram of a functional module structure of a radio frequency resource management module according to the present invention.

Fig. 2 is a schematic circuit diagram of the analog-to-digital conversion circuit in fig. 1.

[ detailed description ] embodiments

Please refer to fig. 1, which is a schematic structural diagram of functional modules of a radio frequency resource management module according to the present invention. Implement the utility model discloses a radio frequency resource management module is including control and processing circuit, power supply circuit, clock circuit, interface circuit, analog-to-digital conversion circuit and digital-to-analog conversion circuit. The control and processing circuit is used for generating a control instruction of a radio frequency resource, simultaneously completing digital signal processing functions such as coding, decoding, modulation, demodulation and the like, providing a reference clock for the digital-to-analog conversion circuit, the clock circuit uses a constant temperature crystal oscillator to provide a local oscillator clock for the control and processing circuit, the interface circuit uses control signals of the driving chip input and output module to convert part of single-ended output signals into differential signals with RS422 level, the analog-to-digital conversion circuit uses a small digital-to-analog conversion chip with low sampling rate, can receive external low-frequency analog signals and convert the external low-frequency analog signals into digital signals, and can also be used for cooperatively monitoring voltage and temperature of important devices of the radio frequency module, and the digital-to-analog conversion circuit can convert the digital signals generated by the control and processing circuit into analog signals and output the analog signals to the.

The control and processing circuit is an FPGA (field programmable gate array) with the model number of EP3C120F484C8 produced by Altera company, and the peripheral circuit comprises a JTAG interface circuit and a power supply filter circuit. The circuit is powered by three direct-current voltages of 2.5V, 3.3V and 1.2V, and each power supply is filtered by a corresponding capacitor and then supplies voltage to the FPGA. And each bus data is crosslinked with the FPGA through the interface driving circuit, analog data enters the FPGA through the ADC, and the FPGA generates a digital intermediate frequency signal and sends the digital intermediate frequency signal to the DAC chip.

The power supply circuit uses 4 DC-DC chips with the maximum output current of 4A to convert the 3.3V direct current voltage input by the radio frequency resource management module into stable digital and analog voltages of 3.3V, 2.5V, 1.8V and 1.2V, and provides required power supplies for the internal FPGA, DAC, ADC, crystal oscillator and driving chips.

A16-bit large-dynamic-range DAC chip is adopted as an analog-digital conversion circuit core device. The circuit can have two-way data output, and the sampling rate reaches 1 Gsps. The specific structure of the analog-to-digital conversion circuit is shown in fig. 2, and the analog-to-digital conversion circuit comprises a DAC chip, a clock equalization circuit, a power supply filter circuit, an output matching circuit and a filter circuit. The FPGA of the control and processing circuit provides a reference clock for the digital-to-analog conversion circuit, the reference clock is input into the DAC chip through the clock equalization circuit, a digital signal needing digital-to-analog conversion is generated by the FPGA, converted into an analog signal through the DAC chip, output through the output matching circuit, filtered and output through the radio frequency connector. Control data required by the analog-to-digital conversion circuit is also generated by the FPGA and sent to the DAC chip through the SPI bus.

The digital-to-analog conversion circuit comprises three paths of AD conversion sub-circuits with 12-bit resolution and 3Msps sampling rate, can simultaneously convert 3 analog signals and inputs digital signals into the control and processing circuit.

The interface driving circuit mainly comprises SPI, RS422, RS232, RS485 bus driving chips and peripheral circuits thereof, and can realize interaction of various buses and discrete lines with other circuits outside the module.

Compared with the prior art, implement the utility model discloses a radio frequency resource management module has following profitable technological effect:

1. the wireless sensor network has the data transmission capabilities of various buses such as SPI, RS422, RS232 and RS485, has the discrete line control capabilities of differential discrete lines, single-ended discrete lines and the like, and improves the radio frequency resource management and control efficiency;

2. the system has ADC and DAC and digital signal processing capacity, can simultaneously control a plurality of radio frequency chips such as a frequency synthesizer, a VCO, a numerical control attenuator and an amplifier, and can comprehensively and efficiently provide management control service for the actual work and debugging of a plurality of radio frequency modules;

3. the digital intermediate frequency generation and digital-to-analog conversion functions of 16bit high dynamic range and 1Gsps sampling rate can be realized, and analog intermediate frequency signals can be provided for a radio frequency transmitting circuit;

4. the low-power consumption analog signal sampling and analog-to-digital conversion with the sampling rate of 3Msps are realized, and the digital signal processing of the sampling signal is completed.

It should be understood that equivalent alterations and modifications can be made by those skilled in the art according to the technical solution of the present invention and the inventive concept thereof, and all such alterations and modifications should fall within the scope of the appended claims.

Claims

1. A radio frequency resource management module comprises a control and processing circuit, a power circuit, a clock circuit, an interface circuit, an analog-to-digital conversion circuit and a digital-to-analog conversion circuit, and is characterized in that: the control and processing circuit is used for generating a control instruction of a radio frequency resource, simultaneously completing digital signal processing functions of coding, decoding, modulation, demodulation and the like, providing a reference clock for the digital-to-analog conversion circuit, providing a local oscillator clock for the control and processing circuit, converting part of single-ended output signals into differential signals with RS422 level by using control signals of the input and output module of the driving chip through the interface circuit, receiving external low-frequency analog signals and converting the external low-frequency analog signals into digital signals through the analog-to-digital conversion circuit, and converting the digital signals generated by the control and processing circuit into the analog signals through the digital-to-analog conversion circuit.

2. The radio resource management module of claim 1, wherein: the core device of the control and processing circuit is FPGA, and the peripheral circuit comprises a JTAG interface circuit and a power supply filter circuit.

3. The radio resource management module of claim 1, wherein: the power supply circuit uses 4 DC-DC chips with the maximum output current of 4A.

4. The radio resource management module of claim 1, wherein: the analog-digital conversion circuit comprises a DAC chip, a clock equalization circuit, a power supply filter circuit, an output matching circuit and a filter circuit, an FPGA of the control and processing circuit provides a reference clock for the digital-analog conversion circuit, the reference clock is input into the DAC chip through the clock equalization circuit, and digital signals needing digital-analog conversion are generated by the FPGA and are converted into analog signals by the DAC chip.

5. The radio resource management module of claim 1, wherein: the digital-to-analog conversion circuit comprises three paths of AD conversion sub-circuits with 12-bit resolution and 3Msps sampling rate, simultaneously converts 3 analog signals and inputs digital signals to the control and processing circuit.

6. The radio resource management module of claim 1, wherein: the interface driving circuit comprises SPI, RS422, RS232 and RS485 bus driving chips and peripheral circuits thereof.