long distance transmit receive RF gateway device service system and method of transmitting acoustic signal and CFS signal

Abstract

The present invention relates to a long-distance transmission and reception RF gateway device service system and a method for transmitting acoustic signals and CFS signals. According to the present invention, long-distance deployment of surface ships or aircraft becomes possible by utilizing a satellite communication method such as Iridium, thereby significantly reducing the risk of location exposure.

Description

Technology Field

[0001] The present invention relates to a long-distance transmission and reception RF gateway device service system and a method for transmitting acoustic signals and CFS signals. Background Technology

[0002] Conventionally, sonobuoys were dropped from aircraft, and aircraft or surface vessels were positioned in close proximity to the dropped sonobuoy. In other words, due to the short-range RF transmission after deployment, surface vessels or aircraft were deployed around the sonobuoy. Consequently, this increased the risk associated with location exposure.

[0003] A sonobuoy is a relatively small, consumable sonar device deployed into the water from aircraft or warships to detect submarines. Also known as an acoustic buoy, it is a small buoy (dropped from an aircraft) equipped with an underwater acoustic listening device and a transmitter for submarine detection; it receives underwater sound waves and retransmits them to a radio receiver.

[0004] After the sonobuoy is deployed underwater, a target is detected through an acoustic sensor, and when the acoustic signal is received in real time from an aircraft or surface ship, the sonobuoy operator listens to the acoustic signal and analyzes it using the LOFAR (Low Frequency Analysis and Recording) gram of the receiver.

[0005] In other words, deploying aircraft (tens of km) or surface ships (several km) in close proximity to sonobuoys resulted in limitations on reception at such close range between surface ships and sonobuoys, and there was a problem of delayed detection time due to target detection following the acoustician's auditory analysis. The problem to be solved

[0006] The present invention aims to solve the aforementioned necessities and / or problems.

[0007] In addition, the purpose is to provide a remote transmission and reception RF gateway device service system and a method for transmitting acoustic signals and CFS signals, which enable remote deployment of surface ships or aircraft using a satellite communication method, transmit detection warning signals through acoustic signal analysis including sonobuoy acoustic signals, and change the setting values ​​of each sonobuoy by transmitting multiple CFS signals. means of solving the problem

[0008] According to one aspect of the long-distance transmission and reception RF gateway device service system of the present invention for achieving the above-mentioned purpose, the system may include: a sonobuoy that detects a target with an acoustic sensor after being deployed underwater and generates an acoustic signal; a long-distance transmission and reception RF gateway device that receives the acoustic signal generated by the sonobuoy, analyzes it, preprocesses the detection result, and modulates it; and a satellite that receives the signal modulated by the long-distance transmission and reception RF gateway device and transmits it to a receiving vessel of a surface ship or aircraft deployed at a distance.

[0009] The above-described long-distance transmission and reception RF gateway device may include a launch tube with a cylindrical structure; a cap launcher coupled to the upper opening of the launch tube; and a piston assembly coupled to the lower opening of the launch tube.

[0010] The launch tube may include a parachute assembly comprising a parachute and a parachute connecting line; a signal processing and transmission / reception assembly having a sonobuoy transmission / reception antenna capable of transmitting and receiving from the sonobuoy and a satellite antenna capable of transmitting and receiving signals to the satellite built inside the buoy; and a seawater battery that supplies voltage for operation after the long-distance transmission / reception RF gateway device reaches seawater.

[0011] The above signal processing and transmission / reception assembly may include: a sonobuoy transmission / reception antenna capable of transmitting and receiving from the sonobuoy inside the buoy; a satellite antenna capable of transmitting and receiving signals to the satellite; an RF transmission / reception circuit that analyzes an acoustic signal received through the sonobuoy transmission / reception antenna to generate a target detection warning signal, modulates the target detection warning signal including the acoustic signal according to a satellite communication method, and transmits it to the satellite through the satellite antenna; a GPS reception circuit that acquires GPS information; an RF blocking shield installed below the GPS reception circuit to block signal interference with the RF transmission / reception circuit; a gas cylinder opening / closing circuit that operates via a seawater detection circuit to prevent the long-distance transmission / reception RF gateway device from sinking underwater after deployment; and a carbon dioxide gas cylinder that moves carbon dioxide inside to the buoy through the gas cylinder opening / closing circuit.

[0012] The above RF transceiver circuit can generate a target detection warning signal by accumulating real-time acoustic signals and comparing them.

[0013] The above RF transceiver circuit can modulate the target detection warning signal including the acoustic signal to a center frequency of 1.6 GHz in accordance with the satellite communication method.

[0014] Meanwhile, according to one aspect of the method for transmitting an acoustic signal using a remote transmission and reception RF gateway device according to the present invention for achieving the above-mentioned purpose, the method may include the steps of: setting up and dropping a sonobuoy, and after the sonobuoy reaches the sea surface, operating a seawater battery so that the sonobuoy operates at a set value; dropping a remote transmission and reception RF gateway device and after it reaches the sea surface, operating a seawater battery; generating and modulating an acoustic signal detected by the sonobuoy and transmitting it to the remote transmission and reception RF gateway device; the RF transmission and reception circuit of the remote transmission and reception RF gateway device demodulating and analyzing the acoustic signal of each sonobuoy received through the sonobuoy transmission and reception antenna, and preprocessing the detection result to generate a target detection warning signal; the RF transmission and reception circuit modulating the target detection warning signal including the acoustic signal according to a satellite communication method and transmitting it to a satellite through a satellite antenna; and the satellite transmitting the target detection warning signal including the received acoustic signal to a receiver on a surface ship or aircraft deployed at a distance.

[0015] In the step of generating and modulating an acoustic signal detected by the sonobuoy and transmitting it to the remote transmission / reception RF gateway device, the acoustic signal detected by the sonobuoy can be transmitted in up to 16 channels.

[0016] In the step of generating a target detection warning signal by demodulating and analyzing the acoustic signal of each sonobuoy received through the sonobuoy transmitting and receiving antenna and preprocessing the detection result, the RF transmitting and receiving circuit of the above-mentioned long-distance transmitting and receiving RF gateway device can demodulate and analyze the acoustic signal of each sonobuoy of up to 16 channels received through the sonobuoy transmitting and receiving antenna.

[0017] In the step of the RF transceiver circuit of the above-described long-distance transceiver RF gateway device demodulating and analyzing the acoustic signal of each sonobuoy received through the sonobuoy transceiver antenna and preprocessing the detection result to generate a target detection warning signal, the RF transceiver circuit can generate a target detection warning signal by accumulating and comparing real-time acoustic signals.

[0018] In the step of the RF transceiver circuit modulating a target detection warning signal including an acoustic signal in accordance with the satellite communication method and transmitting it to a satellite through a satellite antenna, the RF transceiver circuit can modulate the target detection warning signal including an acoustic signal to a center frequency of 1.6 GHz in accordance with the satellite communication method.

[0019] Meanwhile, according to one aspect of a method for transmitting a CFS signal using a long-distance transmission and reception RF gateway device according to the present invention for achieving the above-mentioned purpose, the method may include: a step of deploying a long-distance transmission and reception RF gateway device and operating a seawater battery after reaching the sea surface; a step of transmitting a CFS signal for changing the setting value of each sonobuoy to a satellite from a receiver on an aircraft or a surface vessel; a step of receiving and demodulating the CFS signal for changing the setting value of each sonobuoy through a satellite antenna at the RF transmission and reception circuit of the long-distance transmission and reception RF gateway device; a step of analyzing the changed setting value of the demodulated CFS signal according to the CFS data packet standard at the RF transmission and reception circuit; a step of modulating the analyzed CFS signal at the RF transmission and reception circuit into a signal capable of setting the CFS of the sonobuoy and transmitting it to each sonobuoy through a sonobuoy transmission and reception antenna; and a step of changing the setting value based on the CFS signal received at each sonobuoy.

[0020] In the step of transmitting a CFS signal to a satellite for changing the setting value of each sonobuoy from a receiver of the aircraft or surface ship, the number of sonobuoys capable of changing the setting value of each sonobuoy may be up to 16 channels.

[0021] In the step of transmitting a CFS signal to a satellite for changing the set value of each sonobuoy from a receiver of the aircraft or surface vessel, the set value of each sonobuoy may include at least one of depth, lifespan, sensor, and Automatic Gain Control (AGC) value. Effects of the invention

[0022] The effects according to one embodiment of the present invention are described as follows.

[0023] According to the present invention, remote deployment of surface ships or aircraft is made possible by using a satellite communication method such as Iridium, thereby significantly reducing the risk of location exposure.

[0024] In addition, because detection alarm signals are transmitted after rapid analysis through acoustic signal preprocessing, the target detection time after analysis by the acoustic detector can be further reduced.

[0025] In addition, by transmitting CFS control signals for multiple sonobuoy setting changes, the time required for each sonobuoy setting change can be reduced. Brief explanation of the drawing

[0026] The accompanying drawings, which are included as part of the detailed description to aid in understanding the present invention, provide embodiments of the present invention and explain the technical features of the present invention together with the detailed description. FIG. 1 is a diagram showing the overall configuration of a long-distance transmission and reception RF Gateway device service system according to an embodiment of the present invention. Figure 2 is a diagram showing the configuration of the long-distance transmission and reception RF Gateway device in Figure 1. FIGS. 3 and 4 are drawings illustrating an example of a method for transmitting an acoustic signal using a long-distance transmission and reception RF Gateway device according to an embodiment of the present invention. FIGS. 5 and 6 are drawings illustrating an example of a CFS signal transmission method using a long-distance transmission and reception RF Gateway device according to an embodiment of the present invention. Specific details for implementing the invention

[0027] Hereinafter, embodiments disclosed in the present invention will be described in detail with reference to the attached drawings. Identical or similar components regardless of drawing symbols are assigned the same reference number, and redundant descriptions thereof will be omitted. The suffixes "module" and "part" used for components in the following description are assigned or used interchangeably solely for the ease of drafting the specification and do not inherently possess distinct meanings or roles. Furthermore, in describing the embodiments disclosed in the present invention, if it is determined that a detailed description of related prior art could obscure the essence of the embodiments disclosed in the present invention, such detailed description will be omitted. Additionally, the attached drawings are intended only to facilitate easy understanding of the embodiments disclosed in the present invention; the technical concept disclosed in the present invention is not limited by the attached drawings, and it should be understood that they include all modifications, equivalents, and substitutions that fall within the concept and technical scope of the present invention.

[0028] Terms including ordinal numbers, such as first, second, etc., may be used to describe various components, but said components are not limited by said terms. These terms are used solely for the purpose of distinguishing one component from another.

[0029] When it is stated that one component is "connected" or "connected" to another component, it should be understood that while it may be directly connected or connected to that other component, there may also be other components in between. On the other hand, when it is stated that one component is "directly connected" or "directly connected" to another component, it should be understood that there are no other components in between.

[0030] A singular expression includes a plural expression unless the context clearly indicates otherwise.

[0031] In this application, terms such as “comprising” or “having” are intended to specify the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0032] FIG. 1 is a diagram showing the overall configuration of a long-distance transmission and reception RF Gateway device service system according to an embodiment of the present invention.

[0033] As described, after being deployed underwater, the sonobuoy (100) detects a target (200) using an acoustic sensor. The acoustic signal generated at this time is transmitted through an RF antenna, and due to the short-range transmission method, a surface ship (several km) (300) or an aircraft (tens of km) (400) is positioned nearby.

[0034] After deploying the long-distance transmission and reception RF Gateway device (500), an acoustic signal can be transmitted to the satellite (600) using a satellite communication method. Subsequently, the satellite (600) transmits the signal to a receiving vessel of a surface ship (300) or aircraft (400) deployed at a distance. The transmitted signal, including the acoustic signal, is analyzed by the long-distance transmission and reception RF Gateway device (500), and after receiving the target detection notification signal, the target can be detected.

[0035] Figure 2 is a diagram showing the configuration of the long-distance transmission and reception RF Gateway device in Figure 1.

[0036] As described above, the long-distance transmission and reception RF Gateway device (500) of the present invention may be composed of a cylindrical launch tube (530), a cap launcher (510) coupled to the upper opening of the launch tube (530), and a piston assembly (570) coupled to the lower opening of the launch tube (530).

[0037] The launch tube (530) can be subdivided into a parachute assembly (540), a signal processing and transmission / reception assembly (550), and a seawater battery (560).

[0038] The parachute assembly (540) may consist of a parachute and a parachute connecting line for dropping the remote transmission / reception RF Gateway device (500).

[0039] The signal processing and transmission / reception assembly (550) may have a sonobuoy transmission / reception antenna (551) capable of transmitting and receiving signals from a sonobuoy (100) and a satellite antenna (552) capable of transmitting and receiving signals to a satellite built inside the buoy.

[0040] GPS information can be obtained through the GPS receiving circuit (553), and can be blocked by an RF blocking shield (555) to reduce signal interference with the RF transmitting and receiving circuit (554). Additionally, the transmitting and receiving signal can be transmitted to the RF transmitting and receiving circuit (554) through a cable.

[0041] The RF transceiver circuit (554) can generate a target detection warning signal after analyzing the transmitted and received signals through modulation and demodulation.

[0042] The RF transceiver circuit (554) can analyze the acoustic signal received through the sonobuoy transceiver antenna (551) to generate a target detection warning signal, and then modulate the target detection warning signal including the acoustic signal according to the satellite communication method and transmit it to the satellite (600) through the satellite antenna (552).

[0043] The gas cylinder opening / closing circuit (557) can be operated via a seawater detection circuit to prevent the long-distance transmission / reception RF Gateway device (500) from sinking into the water after being dropped.

[0044] The CO2 gas cylinder (556) can move the CO2 inside to the buoy through the gas cylinder opening / closing circuit (557).

[0045] The seawater battery (560) can supply voltage for operation after the long-distance transmission / reception RF Gateway device (500) reaches the seawater.

[0046] FIGS. 3 and 4 are drawings illustrating an example of a method for transmitting an acoustic signal using a long-distance transmission and reception RF Gateway device according to an embodiment of the present invention.

[0047] As described above, the method for transmitting an acoustic signal using the long-distance transmission and reception RF Gateway device of the present invention is as follows.

[0048] First, the sonobuoy (100) is set up and dropped, and after the sonobuoy (100) reaches the sea surface, the seawater battery is activated so that the sonobuoy (100) can operate at the set value. At the same time, the long-distance transmission and reception RF Gateway device (500) is dropped, and after the long-distance transmission and reception RF Gateway device (500) reaches the sea surface, the seawater battery can be activated.

[0049] Acoustic signals detected by the sonobuoy (100) can be generated and modulated and transmitted to a remote transmission and reception RF Gateway device (500) via up to 16 channels (16 sonobuoys).

[0050] The RF transceiver circuit (554) of the long-distance transceiver RF Gateway device (500) can demodulate and analyze the acoustic signals of up to 16 channels of each sonobuoy received through the sonobuoy transceiver antenna (551), process (preprocess) the detection results, and generate a target detection alarm signal. It may be desirable to generate a target detection alarm signal by accumulating real-time acoustic signals and comparing them.

[0051] The RF transceiver circuit (554) can modulate a preprocessed signal, including an acoustic signal, to match the satellite communication method for the target detection alarm signal for satellite communication. At this time, it may be preferable to modulate it with a center frequency of about 1.6 GHz.

[0052] The satellite antenna (552) of the long-distance transmission and reception RF Gateway device (500) can transmit the satellite signal modulated by the RF transmission and reception circuit (554) to a receiver on a surface vessel (300) or aircraft (400) located at a long distance, and the transmitted signal can be analyzed and demodulated at the receiver to use the signal.

[0053] FIGS. 5 and 6 are drawings illustrating an example of a CFS signal transmission method using a long-distance transmission and reception RF Gateway device according to an embodiment of the present invention.

[0054] As described above, the method for transmitting a Command Function Select (CFS) signal using the remote transmission and reception RF Gateway device (500) of the present invention is as follows. Here, Command Function Select (CFS) may refer to a method of setting GPS settings, operating time, communication channels, etc. after dropping a sonobuoy.

[0055] First, the long-distance transmission and reception RF Gateway device (500) is dropped, and after the long-distance transmission and reception RF Gateway device (500) reaches the sea surface, the seawater battery can operate.

[0056] The setting value of each sonobuoy (100) can be changed at the receiver of the aircraft (400) or surface ship (300). At this time, the number of sonobuoys (100) that can be changed is up to 16 Channels (16 shots), and the setting value of each sonobuoy may include depth, lifespan, sensor, and Automatic Gain Control (AGC) values.

[0057] The CFS signal modified at the receiver of the aircraft (400) or surface ship (300) can be transmitted to each sonobuoy control command signal to the satellite (600) after modulation at the receiver.

[0058] The long-distance transmission and reception RF Gateway device (500) can receive and demodulate up to 16 channels of each sonobuoy (100) CFS signal transmitted from the satellite (600) through the satellite antenna (552).

[0059] The RF transmission / reception circuit (554) of the remote transmission / reception RF Gateway device (500) can analyze the CFS signal that has been received and demodulated through the satellite antenna (552). That is, after analyzing the setting value changed according to the CFS data packet standard, it can be modulated into a signal that allows the CFS setting of the sonobuoy to be enabled, and each sonobuoy CFS signal can be transmitted through the sonobuoy transmission / reception antenna (551).

[0060] Each sonobuoy (100) can receive a modulated CFS signal transmitted through the sonobuoy transmitting / receiving antenna (551) of the remote transmitting / receiving RF Gateway device (500), analyze it, and change the setting value.

[0061] As such, the present invention enables the transmission of detection and warning signals through acoustic signal analysis including sonobuoy acoustic signals, enables long-distance deployment of surface ships or aircraft using a satellite communication method, and allows changing the setting values ​​of each sonobuoy by transmitting multiple CFS signals.

[0062] The foregoing detailed description of the present invention shall not be interpreted as restrictive in all respects and shall be considered as exemplary. The scope of the present invention shall be determined by a reasonable interpretation of the appended claims, and all modifications within the equivalent scope of the present invention are included within the scope of the present invention. Explanation of the symbols

[0063] 100 : Sonobuoy 200: Target 300 : Suspicious 400 : Aircraft 500: Remote Transmit / Receive RF Gateway Device 510 : Cap launcher 520 : Launch tube 530 : Launch tube 540: Parachute assembly 550 : Signal processing and transmit / receive assembly 551 : Sonobuoy transmitting and receiving antenna 552 : Satellite antenna 553 : GPS receiving circuit 554 : RF transceiver circuit 555 : RF blocking shield 556 : CO2 gas cylinder 557 : Gas cylinder switching circuit 560 : Seawater battery 570 : Piston assembly

Claims

Claim 1 A long-distance transmission and reception RF gateway device service system comprises: a sonobuoy that detects a target using an acoustic sensor after being deployed underwater and generates an acoustic signal; a long-distance transmission and reception RF gateway device that receives the acoustic signal generated by the sonobuoy, analyzes it, preprocesses the detection result, and modulates it; and a satellite that receives the signal modulated by the long-distance transmission and reception RF gateway device and transmits it to a receiving vessel of a surface ship or aircraft deployed at a distance. The long-distance transmission and reception RF gateway device comprises: a launch tube with a cylindrical structure; a cap launcher coupled to the upper opening of the launch tube; and a piston assembly coupled to the lower opening of the launch tube. The launch tube comprises: a parachute assembly composed of a parachute and a parachute sling; and a signal processing and transmission / reception assembly in which a sonobuoy transmission / reception antenna capable of transmitting and receiving from the sonobuoy and a satellite antenna capable of transmitting and receiving signals to and from the satellite are embedded inside the buoy. The long-distance transmission and reception RF gateway device includes a seawater battery that supplies voltage for operation after reaching seawater, and the signal processing and transmission / reception assembly comprises: a sonobuoy transmission / reception antenna capable of transmitting and receiving from a sonobuoy inside the buoy; a satellite antenna capable of transmitting and receiving signals to and from a satellite; an RF transmission / reception circuit unit that analyzes an acoustic signal received through the sonobuoy transmission / reception antenna to generate a target detection warning signal, modulates the target detection warning signal including the acoustic signal according to a satellite communication method, and transmits it to a satellite through the satellite antenna; a GPS reception circuit unit that acquires GPS information; an RF blocking shield installed below the GPS reception circuit unit to block signal interference with the RF transmission / reception circuit unit; and a gas cylinder opening / closing circuit that operates via a seawater detection circuit to prevent the long-distance transmission / reception RF gateway device from sinking underwater after deployment.A long-distance transmission and reception RF gateway device service system characterized by including a carbon dioxide gas cylinder that transfers internal carbon dioxide to a buoy through a gas cylinder opening and closing circuit, and when a long-distance transmission and reception RF gateway device is deployed and the seawater battery is activated after reaching the sea surface, a receiver on an aircraft or surface ship transmits a CFS signal for changing the setting value of each sonobuoy to a satellite, the RF transmission and reception circuit of the long-distance transmission and reception RF gateway device receives the CFS signal for changing the setting value of each sonobuoy through a satellite antenna and processes it for demodulation, the RF transmission and reception circuit analyzes the changed setting value of the demodulated CFS signal according to the CFS data packet standard, the RF transmission and reception circuit modulates the analyzed CFS signal into a signal capable of setting the CFS of the sonobuoy and transmits it to each sonobuoy through the sonobuoy transmission and reception antenna, and changes the setting value based on the CFS signal received by each sonobuoy. Claim 2 delete Claim 3 A long-distance transmission and reception RF gateway device service system according to claim 1, wherein the RF transmission and reception circuit generates a target detection warning signal by accumulating real-time acoustic signals and comparing them. Claim 4 A long-distance transmission and reception RF gateway device service system according to claim 3, wherein the RF transmission and reception circuit modulates a target detection warning signal including an acoustic signal to a center frequency of 1.6 GHz in accordance with a satellite communication method. Claim 5 A long-distance transmission and reception RF gateway device service system according to claim 4, characterized in that when a receiver on an aircraft or surface ship transmits a CFS signal to a satellite for changing the setting value of each sonobuoy, the number of sonobuoys capable of changing the setting value of each sonobuoy is a maximum of 16 channels. Claim 6 A long-distance transmission and reception RF gateway device service system according to claim 5, characterized in that when a receiver on an aircraft or surface vessel transmits a CFS signal to a satellite for changing the setting value of each sonobuoy, the setting value of each sonobuoy includes at least one of depth, lifespan, sensor, and Automatic Gain Control (AGC) value. Claim 7 A method for transmitting an acoustic signal using a remote transmission and reception RF gateway device service system according to any one of claims 1, 3 to 6, comprising: a step in which a sonobuoy is dropped and, after reaching the sea surface, a seawater battery is operated so that the sonobuoy operates at a set value; a step in which a remote transmission and reception RF gateway device is dropped and, after reaching the sea surface, a seawater battery is operated; a step in which an acoustic signal detected by the sonobuoy is generated and modulated and transmitted to the remote transmission and reception RF gateway device; a step in which the RF transmission and reception circuit of the remote transmission and reception RF gateway device demodulates and analyzes the acoustic signal of each sonobuoy received through the sonobuoy transmission and reception antenna, and preprocesses the detection result to generate a target detection warning signal; a step in which the RF transmission and reception circuit modulates the target detection warning signal including the acoustic signal according to a satellite communication method and transmits it to a satellite through a satellite antenna; and a step in which the satellite transmits the target detection warning signal including the received acoustic signal to a receiver on a surface ship or aircraft deployed at a distance. Claim 8 A method for transmitting an acoustic signal according to claim 7, wherein, in the step of generating and modulating an acoustic signal detected by a sonobuoy and transmitting it to a remote transmission / reception RF gateway device, the acoustic signal detected by the sonobuoy is transmitted in up to 16 channels. Claim 9 A method for transmitting acoustic signals according to claim 7, wherein the RF transceiver circuit of a long-distance transceiver RF gateway device demodulates and analyzes the acoustic signals of each sonobuoy received through a sonobuoy transceiver antenna and preprocesses the detection results to generate a target detection warning signal, wherein the RF transceiver circuit analyzes and demodulates the acoustic signals of up to 16 channels of each sonobuoy received through a sonobuoy transceiver antenna. Claim 10 A method for transmitting an acoustic signal according to claim 7, wherein the RF transceiver circuit of a long-distance transceiver RF gateway device demodulates and analyzes the acoustic signal of each sonobuoy received through the sonobuoy transceiver antenna, and preprocesses the detection result to generate a target detection warning signal, wherein the RF transceiver circuit generates the target detection warning signal by accumulating and comparing real-time acoustic signals. Claim 11 A method for transmitting an acoustic signal according to claim 7, wherein, in the step of the RF transceiver circuit modulating a target detection warning signal including an acoustic signal in accordance with a satellite communication method and transmitting it to a satellite through a satellite antenna, the RF transceiver circuit modulates the target detection warning signal including an acoustic signal to a center frequency of 1.6 GHz in accordance with a satellite communication method. Claim 12 delete Claim 13 delete Claim 14 delete

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