RU2262457C1 - Vehicle lo-jack and antitheft device - Google Patents

Abstract

FIELD: transport engineering.

SUBSTANCE: invention is designed for prevention unauthorized use or theft of vehicle. Device includes NAVISTAR navigation system satellites, vehicle equipment, retransmitter with transmit-receive antenna and dispatcher station equipment. Vehicle carry set contains antenna, GPS-signal receiver, radio station, matching unit, microprocessor, additional information pickup, transmit-receive unit and actuating unit. Stationary equipment of dispatcher station contains receiving antenna, transmit-receive antenna, GPS-signal receiver, radio station, matching unit, personal computer, documentation device and display. Device provides duplex radio communication between vehicle and dispatcher station for exchanger of discrete information using two frequencies and complex phase-manipulated signals.

EFFECT: enlarged functional capabilities of device.

7 dwg

Description

The proposed device relates to transport equipment and can be used to prevent unauthorized use or theft of vehicles, such as cars.

Known systems and devices for preventing unauthorized use or theft of vehicles are based:

- on the use of sound signaling devices (ed. certificate of the USSR No. 1634557; RF patents No. 2011575, 2033354, 2040416 and others);

- on the blocking of hydraulic brake and clutch drives with the transmission of alarm information over the air (RF patent No. 2021927 and others);

- on the use of a code device and a radio channel through which alarming information is transmitted (RF patent No. 2033352 and others);

- at capturing a hijacker using a transport pneumatic system (RF patent No. 2050294 and others);

- the use of complex signals transmitted over the radio channel and direction finding of a stolen vehicle by the phase method (RF patents Nos. 2006394, 2033353, 2042548, 2061321, 2061322, 2061323, 2185298 and others).

Of the known systems and devices closest to the proposed is the "Device for protecting the vehicle from theft and theft" (RF patent No. 2185298, 60 R 25/04, 2000), which is selected as a prototype.

The specified device provides reliable protection of the vehicle from theft and theft. This is achieved by using an alarm phase-shift (PSK) signal that carries information about the very fact of unauthorized impact on the vehicle, about the number, make, color of the hijacked vehicle and its location, as well as a control signal that provides engine shutdown, sound and light signaling, as well as door locks. Moreover, the included sound and light alarms are signs of detection of a stolen vehicle, and the turned off engine and locked doors ensure the detention of the vehicle and the attacker.

However, the potential capabilities of equipment installed on the vehicle and the control room are not fully utilized.

An object of the invention is to expand the functionality of the device by establishing duplex radio communication between the vehicle and the control room using two frequencies and complex phase-shift signals.

The problem is solved in that in the vehicle protection device against theft and theft containing Navstar navigation system satellites, an on-board complex mounted on the vehicle and containing a receiving antenna in series, a GPS signal receiver, a pairing unit, a first input-output which through a radio station is connected to a transceiver antenna, and the second input-output is connected to a microprocessor, as well as additional information sensors connected to the interface unit and connected in series connected to the transceiver antenna, the transceiver unit and the executive unit, while the transceiver unit contains a high-frequency generator, a phase manipulator, the second input of which is connected to the first output of the modulating code generator, a power amplifier, an antenna switch, the input-output of which is connected to the transceiver antenna , a high-frequency amplifier, a phase detector, the second input of which is connected to the second output of the high-frequency generator, a correlator, the second input of which is connected the second output of the modulating code generator, and the threshold unit, the executive unit contains a key connected in series to the output of the threshold unit, the second input of which is connected via the ignition key to the positive battery bus, the negative bus of which is connected to the vehicle body, the winding of the first relay, the first make contact circuit breaker and the vehicle body, the positive relay bus is connected in series with the winding of the second relay, the second make contact in a key switch, parallel connected push-button switches of doors, windows, boot, hood and a pendulum switch, and a vehicle body, serially connected in parallel closing a third contact of the first relay and a second contact of a second relay, an audible warning device and a vehicle body, serially connected in parallel connected closing first the contacts of the first and second relays and the transceiver unit, providing it with a supply voltage, through the opening second contact of the first relay e ignition coils, through the fourth fourth contact of the first relay, an electronic lock, between the parallel connected closing third contact of the first relay and the second contact of the second relay and the vehicle body, the warning lights in parallel, a repeater with a transceiver antenna installed in the central part of the city, and stationary equipment, installed at the control room with known coordinates obtained as a result of precision geodetic survey, and consisting of a sequence of about the included receiving antenna, GPS signal receiver, interface unit, the input-output of which is connected to the transceiver antenna via a radio station, the personal computer connected to the documentation device and display is equipped with a transponder connected via the antenna switch to the transceiver antenna of the radio station installed at the control room , each radio station is made in the form of series-connected high-frequency generator, phase manipulator, the second input of which is connected to the output of the source messages, the first mixer, the second input of which is connected to the output of the first local oscillator, the first intermediate frequency amplifier, the first power amplifier, the antenna switch, the input-output of which is connected to the transceiver antenna, the second power amplifier, the second mixer, the second input of which is connected to the output of the second a local oscillator, an amplifier of the second intermediate frequency, a multiplier, the second input of which is connected to the output of the first local oscillator, a bandpass filter and a phase detector, the second input of which is connected ene with output of the second oscillator, and the output is the output of the radio, the frequency ω and ω _{r1 r2} oscillators spaced apart by a second intermediate frequency ω _np2

w _{r1 r2} -ω = ω _WP2,

station placed on a vehicle, emits complex signals with a phase shift keying at frequency ω ₂ = ω _pr1 = ω _r2, and receives - at frequency ω ₃ = ω _r1, and the radio, placed in a control room, on the contrary, emits complex signals with phase manipulation at a frequency of ω ₃ , and takes - at a frequency of ω ₂ .

The block diagram of the device to protect the vehicle from theft and theft is presented in figure 1. The structural diagram of the transceiver unit 10 and the Executive unit 11 is shown in figure 2. Timing diagrams explaining the principle of operation of the device are shown in FIGS. 3 and 7. A block diagram of a radio station 6 located on a vehicle is shown in FIG. 4. The structural diagram of the radio station 18, located at the control room, is presented in figure 5. A frequency diagram illustrating a signal conversion process is shown in FIG. 6.

The device for protecting a vehicle from theft and theft contains satellites 1 * j (j = 1,2, ..., 24) of the Navstar navigation system, a vehicle 2, a relay 13 with a transceiver antenna 12 installed in the central part of the city, and control room 14 with known coordinates obtained as a result of precision geodetic survey.

The on-board complex installed on the vehicle 2 contains a GPS signal receiver 5 sequentially connected to the receiving antenna 3, a pairing device 7, the input-output of which through the radio station 6 is connected to the transmitting and receiving antenna 4, and the microprocessor 8, as well as additional information sensors 9, connected to the pairing device 7, the transceiver unit 10, connected to the transceiver antenna 4, the output of which is connected to the Executive unit 11.

Fixed equipment installed at the control room 14, contains a receiving antenna 15 connected in series, a GPS signal receiver 17, a pairing device 19, the input-output of which through a radio station 18 is connected to a transmitting and receiving antenna 16, a personal computer 20 connected to the documentation device 21 and a display 22.

The transceiver unit 10 comprises serially connected high-frequency generator 23, a phase manipulator 25, the second input of which is connected to the first output of the modulating code generator 24, a power amplifier 26, an antenna switch 27, the input-output of which is connected to the transceiver antenna 4, a high-frequency amplifier 28, a phase detector 29, the second input of which is connected to the second output of the high-frequency generator 23, a correlator 30, the second input of which is connected to the second output of the modulating code generator 24, and the threshold unit 31.

The executive unit 11 contains a key 34 connected in series to the output of the threshold unit 31, the second input of which is connected via the ignition key 33 to the positive bus of the battery 32, the negative bus of which is connected to the vehicle ground, the first relay 35, switch 36, and the vehicle body, the positive bus is connected in series with relays 37, switch 36, parallel-connected push-button switches of doors 39, windows 40, trunk 41, hood 42 and pendulum switch 43 and vehicle mass. To the positive bus of the battery 32 through the make contacts 35.3 and 37.2 of the first 35 and second 37 relays are connected an audible warning device 38 and parallel-connected signal lamps 44-47, the outputs of which are connected to the vehicle body. The positive battery bus 32 is connected to the transceiver unit 10 through the first closing contacts 35.1 and 37.1 of the first 35 and second 37 relays, through the fourth closing contact 37.4 of the second relay 37 it is connected to the electronic lock that blocks the vehicle’s doors, through the second opening contact 35.2 of the first relay to the ignition coil.

Radio station 6 (18) contains a series-connected high-frequency generator 48.1 (48.2), a phase manipulator 49.1 (49.2), the second input of which is connected to a source of discrete messages 50.1 (50.2), the first mixer 51.1 (51.2), the second input of which is connected to the output of the first the local oscillator 52.1 (52.2), the first intermediate frequency amplifier 53.1 (53.2), the first power amplifier 54.1 (54.2), the antenna switch 55.1 (55.2), the input-output of which is connected to the transceiver antenna 4 (16), the second power amplifier 56.1 (56.2) the second mixer 57.1 (57.2), the second input of which is connected to the output of the second local oscillator 58.1 (58.2), an amplifier 59.1 (59.2) of the second intermediate frequency, a multiplier 60.1 (60.2), the second input of which is connected to the output of the local oscillator 52.1 (52.2), a bandpass filter 61.1 (61.2) and a phase detector 62.1 (62.2), the second the input of which is connected to the output of the local oscillator 58.1 (58.2), and the output is the output of the radio station 6 (18).

The device protects the vehicle from theft and theft works as follows.

In case of unauthorized exposure to the guarded vehicle 2, which is expressed, for example, in opening doors, trunk, hood, removing windows, towing the vehicle and moving it under its own power, the windings of the first 35 and second 37 relays are connected to the battery 32. In this case, the button switches of the doors 39, or the windows 40, or the trunk 41, or the hood 42, or the pendulum switch 43 are closed. This can only happen if the switch 36 is closed, which is located in a secret place known only to the owner of the vehicle. The latter, leaving the vehicle interior, closes the switch 36 and thereby puts the vehicle under protection. When leaving the passenger compartment of the vehicle, the owner opens the door and turns on the audible alarm 38 and signal (side) lamps 44-47, making sure that the security device is operational.

Therefore, in case of unauthorized exposure to the vehicle, relay 37 is activated, contacts 37.1 and 37.2 are closed. At the same time, an audible signaling device 38 and signaling (marker) lamps 44-47 are turned on, which attracts the attention of police officers and others.

At the same time, the supply voltage is supplied to the transceiver unit 10. In this case, the high-frequency generator 23 is turned on, which generates a high-frequency oscillation (Fig. 3, a)

U ₁ (t) = υ ₁ * Cos (ω ₁ t + φ ₁ ), О≤t≤T ₁ ,

which is fed to the first input of the phase manipulator 25, to the second input of which a modulating code M ₁ (t) is supplied (Fig. 3, b) containing information about the make, number, color of the vehicle, its location and information about the owner of the vehicle. At the output of the phase manipulator 25, a phase-shift (PSK) signal is generated (Fig. 3, c)

U ₂ (t) = υ ₁ * Cos [ω ₁ t + φ _к1 (t) + φ ₁ ], О≤t≤T ₁ ,

which through the power amplifier 26, the antenna switch 27 and the antenna 4 is radiated into space.

This signal directly or through a relay 13 is received at the control room 14 by the transponder 63, where it is demodulated, decoded and recorded in an electronic journal or on an electronic map, which displays the location of the stolen vehicle and its movement. A transponder 63 generates a control signal similar to an alarm, i.e. having the same carrier frequency ω ₁ and the same modulating code M ₁ (t). Therefore, the alarm signal is re-emitted by the transponder 63 and the antenna 16. The specified signal from the output of the antenna 4 through the antenna switch 27 and the high-frequency amplifier 28 is supplied to the first input of the phase detector 29, the second input of which from the second output of the high-frequency generator 23 is supplied with a U ₁ (t) as the reference voltage. The output of the phase detector 29 is formed of a low-frequency voltage (Fig.3, g)

U _н1 (t) = υ _н1 * _{Cosφ к1} (t), О≤t≤T ₁ ,

where υ _н1 = 1/2 * K ₁ * υ ₁ ² ,

K ₁ is the transfer coefficient of the phase detector;

proportional to the modulating code M ₁ (t) (Fig.3, b). This voltage is supplied to the first input of the correlator 30, to the second input of which a modulating code M ₁ (t) is supplied from the second output of the modulating code generator 24. Since there is a strong correlation between the voltage U _н1 (t) and the modulating code M ₁ (t), a voltage is generated at the output of the correlator 30 that exceeds the threshold voltage υ _then in the threshold block 31. The threshold level υ _then in the threshold block 31 is selected such that only the maximum output voltage of the correlator 30 can exceed it. If the threshold level υ _pores is exceeded, a constant voltage is generated in the threshold block 31, which is supplied to the control input of the key 34 and opens it. In the initial state, the key 34 is always closed. In this case, the supply voltage through the public key 34, the closed ignition key 33 and the closed contacts 36.1 of the switch 36 is supplied to the relay coil 35. The latter is triggered. This condition corresponds to the case when an attacker tries to steal a vehicle. When the relay 35 is activated, contacts 35.1 are closed, duplicating the supply voltage to the transceiver unit 10, contacts 35.2 are opened, the engine is turned off, contacts 35.3 are closed, including an audible warning device 38 and signal (position) lamps 44-47, contacts 35.4 are closed, including an electronic lock, which locks the doors of the vehicle. This fact does not allow the attacker to quickly leave the cabin of the stolen vehicle.

The alarm signal emitted by control room 14 and vehicle 2 is simultaneously received by capture groups (mobile vehicles, posts and individual police officers and traffic police) who, using light and sound alarms, take various measures to detain intruders and a stolen vehicle.

Therefore, the device provides increased efficiency in protecting the vehicle from theft and theft while increasing the reliability of the protection. This is achieved by using an alarm phase-shifted signal that carries information about the fact of unauthorized impact on the vehicle, about the number, make, color of the hijacked vehicle and its location, as well as a control signal that provides engine shutdown, sound and light signaling, as well as blocking doors. Moreover, the included sound and light alarms are signs of the detection of a stolen vehicle, and the turned off engine and locked doors ensure the detention of the vehicle and intruders.

The use of standard equipment of the modern Navstar satellite navigation system, which provides high-frequency determination of the coordinates, speed and time of moving objects anywhere on the Earth 24 hours a day, allows us to hope for widespread use in practice of a vehicle protection device from theft and theft.

The operation of the device described above corresponds to the mode of protecting the vehicle from theft and theft.

If the vehicle is in normal operation, then duplex radio communication is established between it and the control center to exchange discrete information.

In this case, the generator 48.1 generates a high-frequency oscillation (Fig.7, a)

U _c1 (t) = υ _c1 * Cos (φ _with t + φ _c1) O≤t≤T _c1,

which is fed to the first input of the phase manipulator 49.1, to the second input of which a modulating code M ₂ (t) is supplied (Fig. 7, b) from the output of the source 50.1 of discrete messages. At the output of the phase manipulator 49.1 formed FMN signal (Fig.7, b)

U ₃ (t) = υ _c1 * Cos [ω _c t + φ _k2 (t) + φ _c1] O≤t≤T _c1,

which is supplied to the first input of the first mixer 51.1, the second input of which is supplied with the voltage of the first local oscillator 5.2

U _g1 (t) = υ _g1 * Cos (ω _g1 t + φ _g1 ).

At the output of the mixer 51.1, voltages of combination frequencies are generated. Amplifier 53.1 distinguishes the voltage of the first intermediate (total) frequency

U _CR1 (t) = υ _CR1 * Cos [ω _CR1 t + φ _K2 (t) + φ _CR1 ], O≤t≤T _c1 ,

where υ _pr1 = 1/2 * K ₂ * υ _c1 * υ _g1 ,

K ₂ - gear ratio of the mixer;

ω _pr1 = ω _s + ω _g1 - the first intermediate frequency;

φ _pr1 = φ _c1 + φ _g1.

This voltage after amplification in the power amplifier 54.1 through the antenna switch 55.1 enters the transceiver antenna 4 and is radiated by it at a frequency ω ₂ = ω _pr1 , and then it is received by the transceiver antenna 16 and through the antenna switch 55.2 and the power amplifier 56.2 goes to the first input of the mixer 57.2, the second input of which is supplied with voltage U _g1 (t) of the local oscillator 58.2. At the output of mixer 57.2, voltages of combination frequencies are generated. Amplifiers 59.2 are allocated the voltage of the second intermediate (differential) frequency

U _CR2 (t) = υ _CR2 * Cos [ω _CR2 t + φ _K2 (t) + φ _CR2 ], O≤t≤T _s1 ,

where υ _pr2 = 1/2 * K ₂ * υ _pr1 * υ _g1 ,

ω _pr2 = ω _pp- ω _g1 is the second intermediate frequency;

φ _pr2 = φ _pr1 -φ _g1 ,

which goes to the first input of the multiplier 60.2, to the second input of which the local oscillator voltage 52.2

U _g2 (t) = υ _g2 * Cos (ω _g2 t + φ _g2 ).

At the output of the multiplier 60.2 voltage is generated (Fig.7, g)

U ₄ (t) = υ ₄ * Cos [ω _g1 t-φ _к2 (t) + φ _g1 ], О≤t≤T _s1 ,

₄ where υ = 1/2 * K ₃ * υ * υ _{np2, r2,}

K ₃ - transfer coefficient of the multiplier;

which is allocated by the band-pass filter 61.2 and fed to the first input of the phase detector 62.2, the second input of which is supplied with voltage U _g1 (t) from the output of the local oscillator 58.2. The output of the phase detector 62.2 produces a low-frequency voltage (Fig.7, d)

U _n2 (t) = υ _n2 * _{Cosφ k2} (t), O≤t≤T _s1 ,

where υ _Н2 = 1/2 * K ₁ * υ ₄ * υ _g1 ,

which is an analog of the modulating code M ₂ (t) (Fig.7, b).

At the control room 14, an oscillation is generated by the high-frequency oscillation generator 48.2 (Fig. 7, e)

U _c2 (t) = υ _c2 * Cos (ω _c t + φ _c2) O≤t≤T _c2,

which is fed to the first input of the phase manipulator 49.2, to the second input of which a modulating code M ₃ (t) is supplied (Fig. 7, g) from the output of the source 50.2 of discrete messages. At the output of the phase manipulator 49.2 formed FMN signal (Fig.7, h)

₅ U _{(t) = υ c2 * Cos} [ω c t + φ _k3 (t) + φ _c2], O≤t≤T _c2

which is fed to the first input of the mixer 51.2, the second input of which is supplied with voltage U _g2 (t) of the local oscillator 52.2. At the output of the mixer 51.2, voltages of combination frequencies are generated. Amplifier 53.2 distinguishes the voltage of the differential frequency

U _CR3 (t) = υ _CR3 * Cos [ω ₃ t-φ _к3 (t) + φ _CR3 ], O≤t≤T _c2 ,

where υ _pr3 = 1/2 * K ₂ * υ _c2 * υ _g2 ,

ω ₃ = ω _g2 -ω _s,

_PR3 cp = φ -φ _{r2 s2.}

This voltage after amplification in the power amplifier 54.2 through the antenna switch 55.2 enters the transceiver antenna 16 and is radiated by it at a frequency ω ₃ , and then it is received by the transceiver antenna 4 and through the antenna switch 55.1 and the power amplifier 56.1 it goes to the first input of the mixer 57.1, the second input of which a voltage U _g2 (t) is supplied from the output of the local oscillator 58.1. At the output of mixer 57.1, voltages of combination frequencies are generated. Amplifier 59.1 distinguishes the voltage of the differential frequency

U _CR4 (t) = υ _CR4 * Cos [ω _CR2 t-φ _K3 (t) + φ _CR4 ], O≤t≤T _c2 ,

_WP4 where v = 1/2 * K ₂ * v * v _{PR3 r2,}

_np2 ω = ω _z2 -ω ₃ - the second intermediate frequency;

_WP4 cp = φ -φ _{r2 PR3,}

which is fed to the first input of the multiplier 60.1, the second input of which is supplied with voltage U _g1 (t) from the output of the local oscillator 52.1. The output of the multiplier 60.1 voltage is generated (Fig.7, and)

₆ U (t) = υ ₆ * Cos [ω t + φ _{r2 k3} (t) + φ _r2] O≤t≤T _c2

which is allocated by a band-pass filter 61.1 and arrives at the first (information) input of the phase detector 62.1, the second (reference) input of which is supplied with voltage U _g2 (t) from the output of the local oscillator 58.1. At the output of the phase detector 62.1, a low-frequency voltage is generated (Fig. 7, k)

_H3 U (t) = υ _H3 * Cos φ _k3 (t), _c2 O≤t≤T,

where υ _н3 = 1/2 * K ₁ * υ ₆ * υ _g2 ,

which is an analog of the modulating code M ₃ (t) (Fig.7, g).

Thus, the proposed device in comparison with the prototype provides duplex radio communication between the vehicle and the control center for the mutual exchange of discrete information using two frequencies ω ₂ and ω ₃ and complex phase-shift signals. In this case, the vehicle is in normal operation.

Complex signals with phase shift keying have high noise immunity, structural and energy stealth.

The energy secrecy of these signals is due to their high compressibility in time and spectrum with optimal processing, which reduces the instantaneous radiated power. As a result, a complex signal at the receiving point may be masked by noise and interference. Moreover, the energy of a complex FMN signal is by no means small; it is simply distributed over the frequency and time domains so that at each point in this region the signal power is less than the power of noise and interference.

The structural secrecy of complex FMN signals is due to the wide variety of their forms and significant ranges of parameter changes, which makes it difficult to optimize or at least quasi-optimal processing complex FMN signals of an a priori unknown structure in order to increase the sensitivity of the receiver.

Complex FMN signals allow the use of a new type of selection - structural selection.

Thus, the functionality of the device is expanded.

Claims (1)

A device for protecting a vehicle from theft and theft containing Navstar navigation system satellites, an on-board complex mounted on a vehicle and containing a receiving antenna in series, a GPS signal receiver and a pairing unit, the first input-output of which is connected to a transceiver antenna through a radio station and the second input-output is connected to the microprocessor, as well as additional information sensors connected to the interface unit, and connected in series to the transceiver antenna when the transmitting unit and the executive unit, while the transmitting and receiving unit contains a high frequency generator, a phase manipulator, the second input of which is connected to the first output of the modulating code generator, a power amplifier, an antenna switch, the input-output of which is connected to the transmitting and receiving antenna, a high frequency amplifier, a phase detector, the second input of which is connected to the second output of the high-frequency generator, a correlator, the second input of which is connected to the second output of the generator, modulating its code, and the threshold unit, the executive unit contains a key, a first and second relay and a switch, while a key is connected to the output of the threshold unit of the transceiver unit, the second input of which is connected via the ignition key to the positive battery bus, the negative bus of which is connected to the housing the vehicle, the winding of the first relay, the first make contact of the circuit breaker and the vehicle body, connected to the positive bus of the battery are connected in series to the winding of the second a relay, a second closing contact of a switch, parallel-connected push-button switches of doors, windows, a boot, a hood and a pendulum switch, and a vehicle body, serially connected, parallel-connected closing third contact of a first relay and a second contact of a second relay, an audible warning device and a vehicle body, series-connected, parallel-connected closing first contacts of the first and second relays and a transceiver unit with the possibility of providing the latter is voltage power supply, through the opening second contact of the first relay - the ignition coil, and through the closing fourth contact of the first relay - the electronic lock, between the parallel connected closing third contact of the first relay and the second contact of the second relay and the vehicle body, the signal lamps and a repeater with a transceiver antenna installed in the central part of the city, and stationary equipment installed at the control center with known coordinates obtained as a result precision geodetic survey, and consisting of a series-connected receiving antenna, GPS-signal receiver, a pairing unit, the input-output of which is connected to a transceiver antenna through a radio station, a personal computer connected to a documentation device and a display, characterized in that it is equipped with a transponder connected through the antenna switch to the transceiver antenna of the radio station installed at the control room, with each radio station made in the form of series-connected generators a high frequency ator, phase manipulator, the second input of which is connected to the output of the source of discrete messages, the first mixer, the second input of which is connected to the output of the first local oscillator, the amplifier of the first intermediate frequency, the first power amplifier, the antenna switch, the input-output of which is connected to the transceiver antenna, a second power amplifier, a second mixer, the second input of which is connected to the output of the second local oscillator, an amplifier of the second intermediate frequency, a multiplier, the second input of which is connected n with the output of the first local oscillator, a bandpass filter and a phase detector, a second input coupled to an output of the second oscillator, and the output is the output of the radio, the frequency ω and ω _{r1 r2} oscillators spaced apart by a second intermediate frequency ω _{ave 2:} ω _Г2 -ω _Г1 = ω _{пр 2} , a radio station located on the vehicle is capable of emitting complex signals with phase shift keying at a frequency of ω ₂ = ω _p1 = ω _G2 and receiving at a frequency of ω ₃ = ω _G1 , and a radio station located at a control room is capable of emitting complex signals with phase manipulation at a frequency of ω ₃ and reception at a frequency of ω ₂ .

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