A signal processing device and a signal processing system

Abstract

An embodiment of the present invention discloses a signal processing device, which at least includes: a main control module, a radio frequency link switching module, and a radio frequency input module. The radio frequency input module is used to receive radio frequency signals of different frequencies; the main control module is used to judge the received radio frequency link switching instruction, and according to the judgment result, control each radio frequency link in the radio frequency link switching module to be switched on and off. By controlling the radio frequency link, the radio frequency signal can be directly sent to the receiver or processed by various signal processors on the radio frequency link and then sent to the receiver for signal processing and analysis; through various signal processors provided inside the signal processing device, the signals passing through this radio frequency path can be processed to ensure that the signal power entering the receiver cannot be too large, avoid the receiver from being overloaded or saturated, effectively extend the life cycle of the receiver, and at the same time effectively improve the signal monitoring sensitivity of the receiver.

Description

Technical Field

[0001] The present invention relates to the technical field of data transmission, and in particular to a signal processing device and a signal processing system. Background Art

[0002] When new sites in the field of radio monitoring / direction finding are selected at high positions in urban areas or suburbs, these positions are also ideal construction sites for various radio transmitting stations.

[0003] In some areas, there are situations where the transmitting and receiving stations are built within a range of about 500 meters or even on the same iron tower. In some cases, the transmitting signal power is as high as several kilowatts (for example, when the transmitting power of the FM radio signal in the range of 87 MHz - 108 MHz entering the receiver is too large and the position of the receiver device is too close, resulting in too high background noise of the signal received by the receiver and being unable to accurately monitor signals in adjacent frequency bands), which has seriously affected the accuracy of the monitoring values of the monitoring receiver. There are even phenomena such as the receiver being in a saturated state and unable to monitor, and the equipment aging rapidly due to long-term signal overload.

[0004] The traditional way to reduce the signal power entering the receiver is to install attenuators for each frequency band in series at the front end of the receiver. However, in such a series connection method, there is at least 0.5 dB of attenuation at the plug of each attenuator (each attenuator has two plugs). If there are too many attenuators, the signal attenuation will be too large, resulting in a decrease in the sensitivity of the receiver to receive signals. How to improve the sensitivity of the received signal is an urgent problem to be solved at present. Summary of the Invention

[0005] In view of the above technical problems, an embodiment of the present invention provides a signal processing device.

[0006] A first aspect of an embodiment of the present invention provides a signal processing device, which is located between an antenna and a receiver. The signal processing device at least includes: a main control module, a radio frequency link switching module, and a radio frequency input module. The radio frequency link switching module is respectively connected to the main control module and the radio frequency input module, where:

[0007] The radio frequency input module is configured to receive radio frequency signals of different frequencies and input the radio frequency signals into the radio frequency link switching module;

[0008] The main control module is configured to judge the received radio frequency link switching instruction. According to the judgment result, control the opening and closing of each radio frequency link in the radio frequency link switching module. By controlling the radio frequency link, the radio frequency signal received by the radio frequency input module can be directly sent to the receiver or sent to the receiver for signal analysis and processing after being processed by various signal processors on the radio frequency link.

[0009] Optionally, the RF link switching module includes an RF direct link and a signal processing link. The RF direct link is used to directly send the received RF signal to the receiver, and the signal processing link is used to send the processed RF signal to the receiver. The signal processing link includes at least a plurality of signal processors, and the plurality of signal processors are connected in parallel.

[0010] Optionally, the signal processing device is also connected to a remote server through a network. The remote server is used to send a remote switching instruction to the main control module so as to switch the RF direct link and the plurality of signal processors in the signal processing link in the switching module.

[0011] Optionally, the plurality of signal processors at least include a first signal processor, a second signal processor, a third signal processor, a fourth signal processor, and a fifth signal processor. The first signal processor, the second signal processor, the third signal processor, the fourth signal processor, and the fifth signal processor are connected in parallel.

[0012] Optionally, the first signal processor is used to perform signal analysis and processing on signals of 30 MHz - 300 MHz;

[0013] The second signal processor is used to perform signal analysis and processing on communication signals of 300 MHz - 1 GHz;

[0014] The third signal processor is used to perform signal analysis and processing on communication signals of 1 GHz - 2 GHz;

[0015] The fourth signal processor is used to perform signal analysis and processing on communication signals of 2 GHz - 3 GHz;

[0016] The fifth signal processor is used to perform signal analysis and processing on communication signals above 3 GHz.

[0017] Optionally, the signal processing device further includes a rotary switch. The rotary switch is connected to the main control module, and the rotary switch is used to switch between the RF direct link and the signal processing link.

[0018] Optionally, the signal processing device further includes a liquid crystal display screen. The liquid crystal display screen is connected to the main control module, and the liquid crystal display screen is used to display the number of link channels where the device is currently located.

[0019] Optionally, the signal processing device further includes an LED display lamp. The LED display lamp is connected to the main control module, and the LED display lamp is used to display the working state of the link channel where the device is currently located.

[0020] Optionally, the signal processing device further includes a power supply inlet for connecting to a DC power supply.

[0021] A second aspect of the embodiments of the present invention provides a signal processing system, including the signal processing device described in the first aspect.

[0022] In the technical solution provided by the embodiments of the present invention, the signal processing device is located between the antenna and the receiver. The signal processing device at least includes: a main control module, a radio frequency link switching module, and a radio frequency input module. The radio frequency link switching module is respectively connected to the main control module and the radio frequency input module, where: the radio frequency input module is used to receive radio frequency signals of different frequencies and input the received radio frequency signals into the radio frequency link switching module; the main control module is used to judge the received radio frequency link switching instruction, and according to the judgment result, control the switching on and off of each radio frequency link in the radio frequency link switching module. By controlling the radio frequency link, the radio frequency signals received by the radio frequency input module can be directly sent to the receiver or sent to the receiver for signal processing and analysis after being processed by various signal processors on the radio frequency link; through various signal processors provided inside the signal processing device, the signals passing through this radio frequency path can be processed to ensure that the signal power entering the receiver cannot be too large, avoid the receiver from being overloaded or saturated, effectively extend the life cycle of the receiver, and at the same time effectively improve the signal monitoring sensitivity of the receiver. Description of the Drawings

[0023] Figure 1 It is a schematic structural diagram of the signal processing device provided in the embodiments of the present invention;

[0024] Figure 2 It is a schematic structural diagram of another signal processing device provided in the embodiments of the present invention;

[0025] Figure 3 It is a schematic structural diagram of yet another signal processing device provided in the embodiments of the present invention. Detailed Embodiments

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts belong to the scope of protection of the present invention.

[0027] Please refer to Figure 1, which is a schematic structural diagram of the signal processing device provided in the embodiment of the present invention. The signal processing device at least includes: a main control module 101, a radio frequency link switching module 102, and a radio frequency input module 103. The radio frequency link switching module is respectively connected to the main control module and the radio frequency input module, where:

[0028] The radio frequency input module 103 is used to receive radio frequency signals of different frequencies and input the radio frequency signals into the radio frequency link switching module;

[0029] The main control module 102 is used to judge the received radio frequency link switching instruction. According to the judgment result, it controls the opening and closing of each radio frequency link in the radio frequency link switching module. By controlling the radio frequency link, the radio frequency signal received by the radio frequency input module can be directly sent to the receiver or processed by various signal processors on the radio frequency link and then sent to the receiver for signal analysis and processing.

[0030] The signal processing device is located between the antenna and the receiver.

[0031] Through the signal processor inside the signal processing device, the signal passing through this radio frequency path is processed to ensure that the signal power entering the receiver cannot be too large, causing the receiver to be overloaded or saturated, and at the same time, the life cycle of the receiver can be effectively extended.

[0032] The signal processing device is built-in with six radio frequency switching links. The first path is a radio frequency direct-through link, and the signal can directly reach the receiver for analysis without obstruction. The other five paths can be used as signal processing links. By default, the system link is the radio frequency direct-through link, and remote switching can be performed when needed. At the same time, on-site manual switching is also supported.

[0033] Such as Figure 3 As shown, the radio frequency link switching module is a 6-to-1 coaxial switch, SP6T 12V. Among them, the radio frequency link switching module includes a radio frequency direct-through link and a signal processing link. The radio frequency direct-through link is used to directly send the received radio frequency signal to the receiver, and the signal processing link is used to send the processed radio frequency signal to the receiver. The signal processing link at least includes a plurality of signal processors, and the plurality of signal processors are connected in parallel. Different types of signal processors can be configured according to needs, including band-stop filters, band-pass filters, high-pass filters, low-pass filters, and low-noise amplifiers, etc.

[0034] Optionally, the plurality of signal processors at least include a first signal processor, a second signal processor, a third signal processor, a fourth signal processor, and a fifth signal processor, and the first signal processor, the second signal processor, the third signal processor, the fourth signal processor, and the fifth signal processor are connected in parallel.

[0035] Optionally, the first signal processor is used to analyze and process signals in the range of 30 MHz - 300 MHz;

[0036] The second signal processor is used to analyze and process signals for 300 MHz - 1 GHz communication signals;

[0037] The third signal processor is used to analyze and process signals for 1 GHz - 2 GHz communication signals;

[0038] The fourth signal processor is used to analyze and process signals for 2 GHz - 3 GHz communication signals;

[0039] The fifth signal processor is used to analyze and process signals for communication signals above 3 GHz.

[0040] Specifically, the first path, the RF direct-through link:

[0041] This link is an RF direct-through link. After the device is started, the link is default closed, and the RF signal can directly reach the RF input port of the receiver through this link for signal analysis and processing.

[0042] The second path: The first signal processor, i.e., the first signal analysis processor.

[0043] This link is for signal analysis and processing after processing 30 MHz - 300 MHz signals

[0044] Stopband frequency: 30 MHz - 300 MHz

[0045] Passband insertion loss: ≤2 dB

[0046] Passband VSWR: ≤1.5

[0047] Stopband rejection: ≥25 dB

[0048] The third path: The second signal processor, i.e., the second signal processor

[0049] This link is for signal analysis and processing after processing 300 MHz - 1 GHz communication signals

[0050] Stopband frequency: 300 MHz - 1 GHz

[0051] Passband insertion loss: ≤2 dB

[0052] Passband VSWR: ≤1.5

[0053] Stopband rejection: ≥20 dB

[0054] The fourth path: The third signal processor, i.e., the third signal processor

[0055] This link processes communication signals in the range of 1 GHz - 2 GHz and then performs signal analysis and processing.

[0056] Stopband frequency: 1 GHz - 2 GHz

[0057] Passband insertion loss: ≤ 2 dB

[0058] Passband VSWR: ≤ 1.5

[0059] Stopband rejection: ≥ 20 dB

[0060] The fifth path: Signal processor four, i.e., the fourth signal processor.

[0061] This link processes communication signals in the range of 2 GHz - 3 GHz and then performs signal analysis and processing.

[0062] Stopband frequency: 2 GHz - 3 GHz

[0063] Passband insertion loss: ≤ 2 dB

[0064] Passband VSWR: ≤ 1.5

[0065] Stopband rejection: ≥ 18 dB

[0066] The sixth path, signal processor five, i.e., the fifth signal processor.

[0067] This link processes communication signals above 3 GHz and then performs signal analysis and processing.

[0068] Stopband frequency: 3 GHz~

[0069] Passband insertion loss: ≤ 2 dB

[0070] Passband VSWR: ≤ 1.5

[0071] Stopband rejection: ≥ 15 dB

[0072] When it is found that the power of the FM broadcast input signal is too large, the link 2 (the second path) can be closed through the software configured in the system, and at the same time, all other links are in the disconnected state, so that the RF signal is processed by the signal processor to ensure that when the signal enters the receiver, it can reach the normal working range of the receiver.

[0073] When it is found that the signals of other frequency bands are too large, the signals can be processed according to the signal processors on different links.

[0074] When there is no need to process the signal, the channel 1 (the first path) can be closed and other links are disconnected, so that the signal passes directly through the receiver without any processing.

[0075] Optionally, the signal processing device is also connected to a remote server through a network, and the remote server is used to send a remote switching instruction to the main control module to switch multiple links in the RF direct link and the signal processing link in the RF link switching module. The network can be a wireless network, such as infrared, Bluetooth, WiFi, etc.

[0076] As Figure 2 shown, the signal processing module further includes a rotary switch 104, and the rotary switch is connected to the main control module. The rotary switch is used to manually switch the RF direct link and the signal processing link.

[0077] Optionally, the signal processing device further includes a liquid crystal display screen 105, and the liquid crystal display screen is connected to the processing module. The liquid crystal display screen is used to display the number of link channels where the device is currently located.

[0078] Optionally, the signal processing device further includes an LED display lamp 106, and the LED display lamp is connected to the processing module. The LED display lamp is used to display the working state of the link channel where the signal processing device is currently located.

[0079] Optionally, the signal processing device further includes a power supply inlet 107, and the power supply inlet is used to connect a DC power supply.

[0080] The power supply inlet can be connected to a DC 12V voltage to supply power to each module in the signal processing device.

[0081] Through the signal processing device provided by the embodiment of the present invention, various troubles caused by high-power signals entering the receiver can be effectively reduced. Not only does it change the installation method of the traditional attenuator, changing the traditional series method to a parallel method, but also the operator only needs to remotely control the electronic switch inside the device through software to real-time switch the state (open / closed) of the RF link. At the same time, the device has a built-in RF direct connection method, which can ensure that the signal enters the receiver with extremely low loss, and maximally improves the accuracy of monitoring data.

[0082] The embodiment of the present invention provides a signal processing system, including the above-mentioned signal processing device.

[0083] In the technical solution provided by the embodiment of the present invention, the signal processing device is located between the antenna and the receiver. The signal processing device at least includes: a main control module, a radio frequency link switching module, and a radio frequency input module. The radio frequency link switching module is respectively connected to the main control module and the radio frequency input module, where: the radio frequency input module is used to receive radio frequency signals of different frequencies and input the received radio frequency signals into the radio frequency link switching module; the main control module is used to judge the received radio frequency link switching instruction, and according to the judgment result, control the switching on and off of each radio frequency link in the radio frequency link switching module. By controlling the radio frequency link, the radio frequency signals received by the radio frequency input module can be directly sent to the receiver or sent to the receiver for signal processing and analysis after being processed by various signal processors on the radio frequency link; through various signal processors provided inside the signal processing device, the signals passing through this radio frequency path can be processed to ensure that the signal power entering the receiver cannot be too large, avoid the receiver from being overloaded or saturated, effectively extend the life cycle of the receiver, and at the same time effectively improve the signal monitoring sensitivity of the receiver.

[0084] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A signal processing device, characterized in that: The signal processing device is located between the antenna and the receiver. The signal processing device at least includes: a main control module, a radio frequency link switching module, and a radio frequency input module. The radio frequency link switching module is respectively connected to the main control module and the radio frequency input module, where: The radio frequency input module is used to receive radio frequency signals of different frequencies and input the radio frequency signals into the radio frequency link switching module; The main control module is used to judge the received radio frequency link switching instruction. According to the judgment result, it controls the opening and closing of each radio frequency link in the radio frequency link switching module. By controlling the radio frequency link, the radio frequency signal received by the radio frequency input module can be directly sent to the receiver or sent to the receiver for signal processing and analysis after being processed by various signal processors on the radio frequency link; The radio frequency link switching module includes a radio frequency direct-through link and a signal processing link. The radio frequency direct-through link is used to directly send the received radio frequency signal to the receiver, and the signal processing link is used to send the processed radio frequency signal to the receiver. The signal processing link at least includes a plurality of signal processors, and the plurality of signal processors are connected in parallel.

2. The signal processing device according to claim 1, wherein, The signal processing device is also connected to a remote server through a network. The remote server is used to send a remote switching instruction to the main control module to switch multiple links in the radio frequency direct-through link and the signal processing link in the switching module.

3. The signal processing device according to claim 1, wherein The plurality of signal processors at least include a first signal processor, a second signal processor, a third signal processor, a fourth signal processor, and a fifth signal processor. The first signal processor, the second signal processor, the third signal processor, the fourth signal processor, and the fifth signal processor are connected in parallel.

4. The signal processing device according to claim 3, wherein The first signal processor is used to perform signal analysis and processing on 30 MHz - 300 MHz communication signals; The second signal processor is used to perform signal analysis and processing on 300 MHz - 1 GHz communication signals; The third signal processor is used to perform signal analysis and processing on 1 GHz - 2 GHz communication signals; The fourth signal processor is used to perform signal analysis and processing on 2 GHz - 3 GHz communication signals; The fifth signal processor is used to perform signal analysis and processing on communication signals above 3 GHz.

5. The signal processing device according to claim 1, characterized in that, The main control module further includes a rotary switch. The rotary switch is connected to the main control module and is used to manually switch the radio frequency direct-through link and the signal processing link.

6. The signal processing device according to claim 1, wherein, The signal processing device further includes a liquid crystal display screen. The liquid crystal display screen is connected to the main control module and is used to display the number of link channels where the device is currently located.

7. The signal processing device according to claim 1, wherein, The signal processing device further includes an LED display lamp. The LED display lamp is connected to the main control module and is used to display the working state of the link channel where the device is currently located.

8. The signal processing device according to claim 1, wherein The signal processing device further includes a power supply inlet, which is used to connect a DC power supply.

9. A signal processing system, characterized in that, Comprising the signal processing device according to any one of claims 1-8.

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