CN215990764U

CN215990764U - Radio frequency signal receiving and demodulating equipment

Info

Publication number: CN215990764U
Application number: CN202122611247.5U
Authority: CN
Inventors: 曾祥华; 廖鹏; 张振华
Original assignee: Changsha Xiandu Technology Co ltd
Current assignee: Changsha Xiandu Technology Co ltd
Priority date: 2021-10-28
Filing date: 2021-10-28
Publication date: 2022-03-08
Anticipated expiration: 2031-10-28

Abstract

The utility model provides a radio frequency signal receiving and demodulating device which comprises a radio frequency receiving module and a signal collecting and processing module in communication connection with the radio frequency receiving module, wherein the radio frequency receiving module comprises a plurality of signal receiving links, and each signal receiving link comprises a radio frequency signal antenna, a radio frequency filter, a low noise amplifier and a radio frequency transceiver chip which are in communication connection in sequence; the signal acquisition processing module comprises a main processing unit, a BD/GPS time service antenna in communication connection with the main processing unit, a temperature and humidity sensor in communication connection with the main processing unit, an Ethernet chip in communication connection with the main processing unit, and an Ethernet interface in communication connection with the Ethernet chip. The utility model can realize the receiving and demodulation of various radio frequency signals such as ACARS, AIS, ADS-B, IFF and the like through a plurality of signal receiving links.

Description

Radio frequency signal receiving and demodulating equipment

Technical Field

The utility model relates to the technical field of signal receivers, in particular to a radio frequency signal receiving and demodulating device.

Background

In order to adapt to different hardware devices and communication environments, it is generally necessary to demodulate different signals, such as ACARS signals, AIS signals, ADS-B signals, and IFF signals. Demodulation of radio frequency signals plays an important role in the efficient transmission of low bit error rate data in wireless communications. In the conventional demodulation technology, different signal receivers are required to demodulate different modulated signals, so that the complexity of a signal receiver circuit is greatly increased. In addition, the conventional signal receiving and demodulating equipment relies on external pulse per second and standard frequency input as time references in a cooperative working mode, and once the equipment works independently, the system time reference of the equipment cannot be formed, so that the operation of the equipment is influenced.

Disclosure of Invention

In order to overcome the defects of the prior art, the utility model provides a radio frequency signal receiving and demodulating device which can receive and demodulate various radio frequency signals such as ACARS, AIS, ADS-B, IFF and the like through a plurality of signal receiving links, and solves the problem that the complexity of a signal receiver circuit is greatly increased because different signal receivers are required to demodulate different modulated signals in the prior art.

The technical scheme of the utility model is as follows:

a radio frequency signal receiving and demodulating device comprises a radio frequency receiving module and a signal collecting and processing module which is in communication connection with the radio frequency receiving module, wherein the radio frequency receiving module is used for receiving various radio frequency signals, and generating high-bandwidth zero intermediate frequency signals or low-bandwidth zero intermediate frequency signals to enter a signal collecting and processing unit through radio frequency amplification, radio frequency filtering, down-mixing, low-pass filtering and intermediate frequency amplification; the radio frequency receiving module comprises a plurality of signal receiving links, and each signal receiving link comprises a radio frequency signal antenna, a radio frequency filter, a low noise amplifier and a radio frequency transceiver chip which are sequentially in communication connection.

The signal acquisition processing module is used for carrying out ADC data sampling on the multi-channel intermediate frequency signals and carrying out signal demodulation and pulse identification on the sampled data to form original demodulation information; meanwhile, local time service is completed through a BD/GPS time service antenna, a timestamp is added to the original demodulation information, and the original demodulation information with the timestamp is sent to an external monitoring system and a decoding system through an Ethernet interface; the device comprises a main processing unit, a BD/GPS time service antenna in communication connection with the main processing unit, a temperature and humidity sensor in communication connection with the main processing unit, an Ethernet chip in communication connection with the main processing unit, and an Ethernet interface in communication connection with the Ethernet chip.

Further, the plurality of signal receiving links are one or more of an ACARS signal receiving link, an AIS signal receiving link, an ADS-B signal receiving link, and an IFF signal receiving link.

Furthermore, the signal receiving link comprises an ADS-B/IFF signal antenna, a radio frequency filter, a low noise amplifier, a power divider and a radio frequency transceiver chip which are sequentially connected in a communication manner.

Furthermore, the radio frequency signal receiving and demodulating equipment also comprises a power supply module which is electrically connected with the radio frequency receiving module and the signal acquisition and processing module.

The radio frequency signal receiving and demodulating equipment receives various radio frequency signals such as ACARS, AIS, ADS-B and IFF through a radio frequency receiving module, generates high-bandwidth zero intermediate frequency signals or low-bandwidth zero intermediate frequency signals through radio frequency amplification, radio frequency filtering, down-mixing, low-pass filtering and intermediate frequency amplification, enters a signal acquisition processing unit, then carries out ADC data sampling on the multi-channel intermediate frequency signals through the signal acquisition processing module, carries out signal demodulation and pulse recognition on the sampled data to form original demodulation information, adds a time stamp to the original demodulation information, then sends the original demodulation information with the time stamp to an external monitoring system and an interpretation system through an Ethernet interface, and the interpretation system completes information decryption and checks the working state of the equipment through the Ethernet interface.

The radio frequency signal receiving and demodulating equipment can receive and demodulate various radio frequency signals such as ACARS, AIS, ADS-B, IFF and the like through a plurality of signal receiving links, and solves the problem that the complexity of a signal receiver circuit is greatly increased due to the fact that different signal receivers are required to demodulate different modulated signals in the prior art; meanwhile, local time service is finished through the BD/GPS time service antenna, and the external pulse per second and the standard frequency input are received by the Ethernet interface to be used as time references, so that the local time service of the system is finished, and the technical problem that the conventional signal receiving and demodulating equipment cannot form the system time reference of the equipment once the conventional signal receiving and demodulating equipment operates independently by using the external pulse per second and the standard frequency input as the time references in a cooperative working mode is solved.

The radio frequency signal receiving and demodulating equipment has the advantages of compatibility with high-speed and low-speed signal demodulation, small volume, simple structure, easiness in design and implementation and the like.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. In the drawings:

fig. 1 is a schematic diagram of a radio frequency signal receiving and demodulating apparatus according to the present invention.

Detailed Description

The embodiments of the utility model will be described in detail below with reference to the drawings, but the utility model can be implemented in many different ways as defined and covered by the claims.

As shown in fig. 1, a radio frequency signal receiving and demodulating device includes a radio frequency receiving module, a signal collecting and processing module and a power module, wherein the signal collecting and processing module and the power module are in communication connection with the radio frequency receiving module; the radio frequency receiving module comprises three signal receiving links, namely an ACARS signal receiving link, an AIS signal receiving link and an ADS-B/IFF signal receiving link; the ACARS signal receiving link comprises an ACARS signal antenna, a radio frequency filter, a low noise amplifier and a radio frequency transceiver chip which are sequentially in communication connection; the AIS signal receiving link comprises an AIS signal antenna, a radio frequency filter, a low noise amplifier and a radio frequency transceiver chip which are sequentially in communication connection; the ADS-B/IFF signal receiving link comprises an ADS-B/IFF signal antenna, a radio frequency filter, a low noise amplifier and a radio frequency transceiver chip which are sequentially connected in a communication mode.

The signal acquisition processing module is used for carrying out ADC data sampling on the multi-channel intermediate frequency signals and carrying out signal demodulation and pulse identification on the sampled data to form original demodulation information; meanwhile, local time service is completed through a BD/GPS time service antenna, a timestamp is added to the original demodulation information, and the original demodulation information with the timestamp is sent to an external monitoring system through an Ethernet interface; the device comprises a main processing unit, a BD/GPS time service antenna in communication connection with the main processing unit, a temperature and humidity sensor in communication connection with the main processing unit, an Ethernet chip in communication connection with the main processing unit, and an Ethernet interface in communication connection with the Ethernet chip.

The power supply module is electrically connected with the radio frequency receiving module and the signal acquisition processing module.

The radio frequency signal receiving and demodulating equipment comprises two modes of independent work and cooperative work; under the independent working mode, the radio frequency signal receiving and demodulating equipment receives 1PPS second pulse output by BD/GPS satellite signals as a time reference, receives and demodulates the input AIS, ACARS, ADS-B and IFF signals, and reports the original demodulation information to an external monitoring system and an interpretation system; in the cooperative working mode, the radio frequency signal receiving and demodulating equipment receives external pulse per second and standard frequency input as time reference, receives and demodulates the input AIS, ACARS and ADS-B radio frequency signals, and reports the original demodulation information to an external monitoring system and an interpretation system.

Claims

1. A radio frequency signal receiving and demodulating device comprises a radio frequency receiving module and a signal collecting and processing module which is in communication connection with the radio frequency receiving module, and is characterized in that,

the radio frequency receiving module is used for receiving various radio frequency signals, generating high-bandwidth zero intermediate frequency signals or low-bandwidth zero intermediate frequency signals through radio frequency amplification, radio frequency filtering, down mixing, low pass filtering and intermediate frequency amplification, and enabling the high-bandwidth zero intermediate frequency signals or the low-bandwidth zero intermediate frequency signals to enter the signal acquisition and processing unit; the radio frequency receiving module comprises a plurality of signal receiving links, and each signal receiving link comprises a radio frequency signal antenna, a radio frequency filter, a low noise amplifier and a radio frequency transceiver chip which are sequentially in communication connection;

2. A radio frequency signal reception demodulating apparatus according to claim 1, wherein: the plurality of signal receiving links are one or more of an ACARS signal receiving link, an AIS signal receiving link, an ADS-B signal receiving link and an IFF signal receiving link.

3. A radio frequency signal reception demodulating apparatus according to claim 2, wherein: the signal receiving link comprises a signal antenna, a radio frequency filter, a low noise amplifier, a power divider and a radio frequency transceiver chip which are sequentially in communication connection.

4. A radio frequency signal reception demodulating apparatus according to any one of claims 1 to 3, characterized in that: the radio frequency receiving module is electrically connected with the signal acquisition and processing module.