KR200325530Y1 - Noise and Interference Cancellation using Signal Cancellation Techniques - Google Patents

Abstract

The present invention proposes a method of combining and removing a signal that is actually adaptable to external environmental changes by using a commonly known technique of combining and removing signals, and receiving and transmitting a common example according to the proposed method by receiving the same frequency. The wireless repeater is described as a reference to facilitate understanding. In a wireless repeater using the same frequency, since the transmission signal is fed back to the receiving antenna and mixed with the receiving signal and input to the amplifier, the feedback signal fed back to the receiving antenna causes the amplifier to become saturated or cause oscillation. Therefore, in order to sufficiently remove the feedback signal fed back, the general wireless repeater separates the transmitting antenna and the receiving antenna and installs the remote antenna and uses a directional antenna having excellent directionality. However, there is no way to fundamentally prevent the feedback and menstruation of radio waves, which are inherent in wireless communication. Therefore, in an environment in which a feedback signal removal technique for removing the feedback signal to be fed back is essential, the feedback signal may be removed using the principle of combining and removing signals.

However, while the existing schemes and the proposed schemes try to eliminate the feedback signal by adjusting the amplitude, phase, and time delay, they have certain limitations, and according to the characteristics of the various radio signals generated in the radio space, the amplitude, phase and The time delay factor has not been reached to the extent that it can adapt and match according to the change of environment to remove unwanted feedback signals. In addition, the theoretical technique for time delay has been established, but it is impossible to implement in the actual field, which is a problem in the size and weight of the system. Therefore, the present invention is a new design for matching amplitude, phase and time delay, which has been a problem in various approaches up to now, eliminating the feedback signal to prevent saturation and oscillation of the amplifier and always maintaining a constant maximum gain signal. It relates to a signal canceller that can send.

Description

Noise and Interference Cancellation using Signal Cancellation Techniques

The present invention is a signal removal technique for removing unnecessary signal components, that is, interference noise, that does not include information in various communication systems, and to remove unwanted signal components at signal coupling points for combining and removing signals. It is a technique to create a corresponding signal to generate a signal having the same amplitude as the signal, a phase difference of 180 degrees, and the same time delay.

Such signal combining and elimination techniques have been established theoretically long ago, but in actual phenomena and reality, they differ from theory and are not commercially available. The main reason for the impossibility of commercialization is that interference noise, which is the object of elimination, is a signal whose amplitude, phase, and time delay continuously change and is a time-varying signal whose variables continuously change according to changes in external and internal environments. Therefore, it is necessary to be able to adapt in real time to the signal characteristics and environment changes inside and outside the system continuously changing with time, but it was impossible to track and capture amplitude, phase, and time delay in real time, but the development of adaptive theory This enables real-time tracking and acquisition of signals.

In general, a signal received in wireless communication is an analog high frequency radio signal and includes all information in an envelope of a received signal. Therefore, since the interference noise not including the information signal must be extracted and removed from the received envelope signal, a means and a technique for extracting the unnecessary signal, that is, the interference noise without the information, are needed.

That is, by using the interference noise extracted by the interference noise extraction means and the input signal information and output signal information extracted at the input and output points of the system, the degree of cancellation of the interference noise and the amplitude and phase variables of each signal And the time delay variables are analyzed to generate the real-time adaptive control signal using the adaptive algorithm to have the optimal elimination performance, and to monitor and control the control variables to have the optimal signal elimination performance using the generated control signal. There is a need for adaptive control to control variables.

The present invention is a technique for creating a corresponding signal for generating a signal having the same amplitude as the interference noise, phase difference of 180 degrees and the same time delay at the signal removal point to remove unnecessary interference noise as described above. And as an adaptive state monitoring control method described with reference to the drawings as follows.

1 is an explanatory diagram for explaining a theory of a signal combining and cancellation technique. In the drawing, S ₁ (t) is referred to as a received signal and S ₂ (t) is assumed as a reference input signal for removing interference noise included in the received signal. In this case, the received signal S ₁ (t) is a signal in which a signal having desired signal information and an interference noise having unwanted signal components are mixed. Therefore, since it is impossible to directly recognize all the information on the unwanted interference noise from the mixed received signals, the interference noise is eliminated by using the reference signal S ₂ (t) similar to the interference noise. For the sake of simplicity, signal S ₁ (t) assumes that only unwanted interference noise is input.)

That is, it is assumed that the received signals S ₁ (t) and S ₂ (t) are signals that can be expressed by the following equation.

S ₁ (t) = A ₁ cos (ωt + θ)

S ₂ (t) = A ₂ cos (ωt + θ)

When the two signals are combined at the coupling point of the signal combiner 100 using Equation 1 above, the combined combined signal becomes an output signal S ₀ (t) and is represented by Equation 2 below.

S ₀ (t) = S ₁ (t) + S ₂ (t) = A ₁ cos (ωt + θ) + A ₂ cos (ωt + θ)

However, Equation 2 includes an amplitude variable and a phase variable, and the signal is combined and removed by the amplitude variable and the phase variable. That is, when there is a deviation between the amplitude coefficient and the phase coefficient as shown in Equation 3 below, the output signal does not become "0".

A ₁ / A ₂ = α

θ-φ + 180 ° = ρ

The two signals S ₁ (t) and S ₂ (t) input to the coupling point of the signal combiner 100 for signal combining and elimination are completely combined so that the output signal S ₀ (t) becomes “0”. The condition is as shown in Equation 4 below, and the output signal S ₀ (t) when the condition in Equation 4 is satisfied can be expressed as in Equation 5.

A ₁ = A ₂

θ-φ + 180 ° = 0

S ₀ (t) = S ₁ (t) + S ₂ (t) = A ₁ cos (ωt + θ) + A ₂ cos (ωt + φ) = 0

The input signal S ₁ (t) in the case of satisfying the equations (4) and (5) is completely removed by S ₂ (t), and the output becomes "0". Cannot be satisfied. Therefore, in general, since the deviation of the amplitude coefficient and the phase coefficient as shown in Equation 3 exist, the amplitude coefficient adjusting device that can adjust the amplitude coefficient and the phase coefficient that can adjust the phase coefficient to minimize the deviation of the amplitude and phase Use the control to minimize the amplitude and phase deviations.

FIG. 2 is a schematic block diagram of a signal canceling technique which is generally used to minimize amplitude and phase deviations generated in the signal combining and canceling technique described with reference to FIG. 1. An amplification attenuator 202, a phase shifter 206 for adjusting the phase deviation, and a time delay 204. The signal combiner 200 performs a function of combining the signals S ₁ (t) and S ₂ (t) and transmits the combined signal to the output. In order for the output of the signal combiner to be " 0 ", the input signals S ₁ (t) and S ₂ (t) must be equal to the condition of Equation 4, i. In theory, however, signals of the same amplitude and antiphase are possible but practically and physically there are no signals of the same amplitude and antiphase. Thus, signal S should be aware of the amplitude value and phase value of the signal S ₁ (t) to remove ₁ (t), by whether the result should adjust the amplitude coefficients and the phase coefficients of the signal S ₂ (t) do. That is, the amplification attenuator 202 amplifies or attenuates the perceived amplitude coefficient, and the phase shifter has a phase difference of 180 degrees with respect to the phase of the signal S ₂ (t) with respect to the phase of the signal S ₁ (t). The phase delayer 204 adjusts the delay time of the two signals that reach the coupling point of the signal combiner 200 from the input point. This way, amplification attenuators, phase shifters, and time delays fixed at a constant value continuously signal the amplitude and phase of the signal S ₂ (t) due to the physical characteristics of the signal S ₁ (t), which changes in real time. Although it is difficult to commercialize because it is impossible to adjust to the amplitude and phase of S ₁ (t), it has a signal cancellation function for one of the amplitude and phase set above.

Accordingly, the present invention generates a signal having a magnitude of the same amplitude and a phase difference of 180 degrees with the signal S ₂ (t) equal to the signal S ₁ (t), and the two signals reaching the coupling point of the signal combiner 200 It is a technique to adjust the delay time so that it can be matched in time so that the two signals are completely combined at the coupling point of the signal combiner so that the influence of the signal S ₁ (t) does not appear at the output.

The purpose of the present invention is to solve the above problems, the function of the signal combiner 200, amplification attenuator 202, phase shifter 206 and time delay 204 of the components of FIG. It is possible to perform enough, using the adaptive technique to compensate for the real time while monitoring the deviation of the signal variable caused by the internal and external environmental changes in real time, and by controlling the above components by the real-time adaptive control technique The effect of the signal S ₁ (t) does not appear at the output.

The purpose of the present invention is to analyze the causes that cause differences in the comparative analysis of theoretical conclusions and actual experimental results in the combination and removal of the above signals, and to remove the input signals by suggesting fundamental measures for the causes. So that its effects do not appear in the output.

Another object of the present invention is to solve the problem that the actual design and commercialization is impossible in the various signal combiner and signal remover methods presented in the existing to enable the actual design and commercialization / commercialization.

Another object of the present invention is to enable real-time adaptation to various environments because the application of real-time adaptive technology.

Another object of the present invention is to enable the application in various other fields for the purpose of combining and removing signals.

1 is an explanatory diagram for explaining the theory of the signal combining and cancellation technique;

Figure 2 is a block diagram schematically showing the configuration of the signal cancellation technique

FIG. 3 is a schematic diagram schematically showing a coupling and cancellation method of a signal to which an adaptive state monitoring controller is added to improve the function of FIG.

4 is an adaptive response signal generator block diagram for generating an adaptive response signal.

5 is a detailed functional block diagram of the variable controller of FIG.

An object of the present invention was devised to solve the above problems, the functions of the signal combiner 200, amplification attenuator 202, phase shifter 206 and time delay unit 204 of the components of FIG. It is possible to perform enough, and it uses the adaptive technique to compensate for the real time while real time monitoring the deviation of the signal variable caused by the internal and external environmental changes, and the signal by controlling the above components by real-time adaptive control To ensure that the influence of S ₁ (t) does not appear at the output, the signal S ₂ (t) has the same amplitude and inverse phase as the signal S ₁ (t) and has the same time delay to reach the coupling point of the signal combiner. Do it.

3 is an adaptive state monitoring controller capable of adjusting the components of FIG. 2, that is, the amplifying attenuator 202, the time delay 204, and the phase shifter 206 with real-time adaptation, to solve the problems shown in FIG. 2. As an added technique, the adaptive state monitoring controller 310 monitors and samples the state of the received signal and the output signal in real time, and uses the state monitoring result in real time to determine the amplitude deviation, phase difference, and time of the two input signals. It analyzes / calculates delays and generates control values to control the components, and can be implemented in various ways. That is, the amplification attenuator 304, the phase shifter 308, and the time delay 306, which are components of the variable controller 302, are used by using a central processor, a digital signal processor, or a look-up table. Create adaptive control values that can be controlled. In addition, the adaptive algorithms can use LMS algorithm, gradient gradient tracking method, least-squares average method, non-uniform stepwise method, error tracking method, and various other algorithms, but suitable algorithms according to the system application and internal / external environmental conditions. Should be selected.

In order to achieve the above objects, the core configuration of the present invention is shown in FIG. 4, and the detailed components are composed of a corresponding signal generator 400 and an adaptive state monitoring controller 412. The detailed components of the corresponding signal generator 400 include a demodulator 402, an AD converter 404, a variable controller 406, a DA converter 408, and a modulator 410, and the variable controller 302 shown in FIG. The function of the amplification attenuator 304, the time delay 306 and the phase shifter 308 is performed in the variable controller 406.

Therefore, the configuration of the present invention to achieve the above objects are as follows.

To avoid the effect of the input signal S ₁ (t) on the output, the signal S ₂ (t) has the same amplitude and inverse phase as the signal S ₁ (t) and has the same time delay to reach the coupling point of the signal combiner. In the signal canceller,

Receives sampled information of input signals S ₁ (t) and S ₂ (t) and output signals S ₀ (t) and other status monitoring points, and compares / analyzes the sampled input information and uses a logical algorithm. Adaptive state monitoring control means for generating control variable values and controlling the control variables. The adaptive state monitoring control means monitors input signals, output signals, and other state monitoring points, and is generated and output from the corresponding signal generator. It monitors the corresponding signal and analyzes / combines the data about the status monitored by the internal control program using the initially set data, and then adjusts / controls each component by applying data to adjust and control each component. .

To prevent the influence of the input signal S ₁ (t) from appearing on the output, create an amplitude equal to the amplitude of the input signal S ₁ (t), convert it to a signal with a phase difference of 180 degrees, and adjust the time delay variable to be the same time delay. And corresponding signal generating means for generating a corresponding signal.

Hereinafter, the configuration of the signal canceller according to the principle of combining and removing the signal according to the present invention will be described in detail with reference to FIG. 4.

4 is a basic configuration diagram of a signal canceller according to the present invention, and its detailed components include a corresponding signal generator 400 and an adaptive state monitoring controller 412. The detailed components of the corresponding signal generator 400 include a demodulator 402, an AD converter 404, a variable controller 406, a DA converter 408, and a modulator 410, and the variable controller 302 shown in FIG. The function of the amplification attenuator 304, the time delay 306 and the phase shifter 308 is performed in the variable controller 406, and the detailed configuration diagram of the variable controller 406 is shown in FIG. The control unit 502, amplitude adjustment unit 504, phase adjustment unit 506, time delay unit 508 and the output signal control unit 510.

In general, signals used in communication may be classified into analog signals and digital signals, and may be classified into low frequency (baseband) and high frequency signals according to frequencies.

The present invention uses a high frequency analog signal as an input signal, but describes the components by separating them into detailed blocks so that they can be applied to low frequency digital signals as necessary. That is, it is very difficult to adjust the RF signal very precisely because the high frequency analog signal is an RF signal transmitted with information on the carrier wave, and in particular, the RF signal passing through the radio space is affected by fading and interference. It is almost impossible to precisely measure the delay difference for the system. In addition, the basic conditions for the elimination of broadband signals are dynamic amplitude, inverse phase and the same time delay for two signals. When these conditions are completely satisfied, complete elimination is performed, but with a certain deviation, complete elimination cannot be achieved. do. Therefore, the method that can adjust the above conditions very precisely is digital signal processing rather than analog signal processing, and the detailed functions of each component are as follows.

The demodulator 402 constituting the first stage of the corresponding signal generator 400 down-converts the received RF signal to a low frequency band, separates it into an I / Q signal if necessary, and generates a baseband analog signal. Do this.

The AD converter 404 uses the analog baseband signal generated by the demodulator 404 to sample according to the sampling rate of the converter, converts the digital signal, and transmits the digital data to the variable controller 406. Uses parallel transmission and serial transmission.

The variable controller 406 performs the functions of the amplifying attenuator 304, the time delay 306 and the phase converter 308 shown in FIG. 3 and is digitally processed by the control signal of the adaptive state monitoring controller 412. Desired amplification attenuation value, phase change value (180 degrees phase difference) and time delay value can be precisely adjusted, the detailed function of the variable controller can be described functionally separated as shown in FIG.

The DA converter 408 converts the digital signal output by adjusting the amplitude, phase, and time variables in the variable controller 406 into an analog baseband signal, and is higher than the sampling rate of the AD converter in order to increase the DA conversion efficiency. Use the sampling rate.

The modulator 410 performs the inverse function of the demodulator 402 as an element constituting the termination of the corresponding signal generator 400. That is, the function of the modulator is a process of restoring the DA-converted baseband analog signal to an RF modulated signal having the same frequency characteristic as the RF signal frequency input to the demodulator 402, and converting the input signal of the demodulator 402 to amplitude conversion. , The output signal (corresponding signal) of the modulator 410 in which the phase shift and the time delay are transformed are transferred to the coupling point of the signal combiner 300 or the signal canceller, which is combined with the signal for removing, to remove the signal. Is done.

The adaptive state monitoring controller 412 combines the input signal S ₁ (t) with the corresponding signal generated by the corresponding signal generator 400 at the coupling point of the signal combiner 300 to completely remove the input signal S ₁ (t). It monitors each input / output state and controls / controls the components of the corresponding signal generator 400. That is, the RF analog signal input to the demodulator 402 is converted into a baseband analog signal, the converted baseband analog signal is converted into a digital signal, the amplitude coefficient is adjusted, and the time delay coefficient is compared / analyzed. It adjusts the phase, and adjusts the phase so that the phase difference of 180 degrees occurs, it is a key element to perform the function of the state monitoring and comparison / analysis of the input / output of the signal combiner 300.

The operation of the adaptive state monitoring controller 412 will be described in more detail. First, the adaptive state monitoring controller 412 is a key device that performs a function of monitoring / controlling all input / output states and coefficients of the system. Detects the amplitude and phase values and stores the detected values. Detects the amplitude and phase values of the input / output signals of the corresponding signal generator 400 and stores the detected values. The amplitude and phase values are detected and the detected values are stored. In addition, the adaptive state monitoring controller 412 monitors the input / output state of the signal combiner while the input / output state monitoring value of the input signal and the input / output state of the signal combiner are removed to monitor the degree of elimination of the input signal. The monitoring values are always compared / analyzed, and the coefficients of the amplitude control unit, phase control unit and time delay unit of the variable controller 406 are continuously adjusted for optimum signal removal. Here, the adaptive state monitoring controller 412 analyzes / combines data on the state monitored by the internal control program using data stored in an internal data storage device (not shown) and adjusts each component. And adjust and control each component by applying the data to be controlled. The data previously stored in the data storage device is in the form of a look-up table or a database. Here, the adaptive state monitoring controller 412 has an adaptive function of compensating the corresponding signal generator 400 for a change in characteristics caused by external environmental change, temperature, input size, phase, time delay, and aging change. . On the other hand, the data storage device is connected to an external computer to transmit internal data, and the operation can be monitored through a specific program of the computer.

5 is a block functionally subdividing the variable controller 406 of FIG. 4 into an input signal controller 502, an amplitude controller 504, a phase controller 506, a time delay unit 508, and an output signal controller ( 510, the control signal 512 is an amplitude adjustment control signal, a phase adjustment control signal, a time delay control signal, an input signal control unit and an output signal control unit generated by the adaptive state monitoring controller 412 of FIG. It is a signal.

The input signal controller 502 checks a bit unit of digital data when a signal converted into a digital signal by the AD converter 404 of FIG. 4 is input to the variable controller 406 in a serial or parallel manner or as an I / Q signal. And a time adjustment control function, and the amplitude adjusting unit 504 adjusts the signal of the input signal control unit to a predetermined level or adjusts the signal by the amplitude adjustment control value generated by the adaptive state monitoring controller 412. Make sure you have the desired level of amplitude.

The phase adjuster 506 phases the digital signal amplitude adjusted by the amplitude adjuster according to the phase adjust control value generated by the adaptive state monitor controller 412 to have a constant phase difference (a phase difference of 180 degrees with a signal for removal). The time delay unit 508 adjusts the digital signal phase-adjusted by the phase adjuster by a delay time adjustment control value generated by the adaptive state monitoring controller 412 (the same time delay as the signal for removal). Adjust the delay time to have.

The output signal controller 510 performs a function similar to that of the input signal controller 502 and does not generate an error before the time delay unit 508 transmits the digital signal whose time delay is adjusted to the DA converter 408. The digital signal is sent to the DA converter for bit-by-bit check and time adjustment to ensure smooth DA conversion.

The signal canceller using the combination and cancellation of these signals can be applied to various fields, and in particular, it can be applied to wireless communication systems and wireless communication repeaters such as cellular, PCS, IMT-2000, TRS and other wireless communication systems. In addition, by applying this technique, the failure rate of the equipment can be reduced to ensure reliability, and the maintenance and reinvestment costs of the system are significantly reduced.

In addition, the present invention is a solution to solve the problems that occur when the transmission signal is fed back to the receiving antenna and mixed with the received information signal to the amplifier in a wireless relay using the same frequency, the feedback feedback Eliminating the signal prevents saturation and oscillation of the amplifier and ensures constant output at all times.

As described above, the signal canceller using the signal combining and cancellation technique can be applied to various fields, and in particular, a wireless communication system and a wireless communication repeater such as cellular, PCS, IMT-2000, TRS, and other wireless communication systems. By applying this technique, the defect rate of equipment can be reduced to ensure reliability, and the cost of maintenance and reinvestment of the system can be significantly reduced.

In addition, the present invention is a solution to solve the problems that occur when the transmission signal is fed back to the receiving antenna and mixed with the received information signal to the amplifier in a wireless relay using the same frequency, the feedback feedback Eliminating the signal prevents saturation and oscillation of the amplifier and ensures constant output at all times.

The present invention is based on the principle of combining and removing signals, which are generally known techniques, and by applying digital signal processing technology, adaptive control technology, and modulation and demodulation technology, fixing to an unachievable level in the control and adjustment of analog radio signals. It also allows for control and adjustment of the signal, eliminating unwanted signals as much as possible to stabilize the system and extend the life of the system.

According to the conventional method, in order to AD convert the received RF signal, the RF signal must be down-converted and converted into a baseband signal. By demodulating the signal directly, the system can be made light and light.

It solves the problems that practical design and commercialization are impossible in the various signal combiner and signal eliminator methods proposed in the present invention, and enables the actual design and commercialization / commercialization. It is intended to be possible and to be applied to various other fields for the purpose of combining and removing signals.

In addition, the device can be applied to a terminal by light and small size, and can be generally applied to a cellular, PCS system, an IMT-2000 system, and a system applying CDMA technology by a simple modification, and a demodulator 402. If the AD converter 404, the DA converter 408, and the modulator 410 are not used, they can be used as signal cancellers in a pure digital system.

Claims (14)

In the signal canceler using the combination and cancellation of signals, Means for generating a corresponding signal that may have an amplitude, a phase and a time delay and an amplitude, an antiphase and the same time delay of the signal to be removed to remove an unwanted signal from the received signal; Real-time monitoring and sampling of the status of received and output signals, and control of components by analyzing / calculating amplitude variation, phase difference, and time delay of two input signals in real time using status monitoring results It generates values, monitors and controls the condition that unwanted signals are always removed optimally, and compares and analyzes the status monitoring data for optimal removal to generate various control signals for optimal removal and Means for monitoring and controlling the adaptive state of functions Signal eliminator using the combination and removal of the signal, characterized in that it comprises a The method of claim 1 The corresponding signal generating means comprises a demodulator, an AD converter, a variable controller, a signal canceller comprising a corresponding signal generator, characterized in that it is composed of a DA converter and a modulator. The method of claim 1, The corresponding signal generating means is configured to adjust an optimum corresponding signal having the same amplitude, inverse phase and the same time delay as the amplitude, phase and time delay of the signal for removal by the control signal transmitted from the adaptive state monitoring controller. Signal canceller comprising a corresponding signal generator, characterized in that for generating and controlling the amplitude variable, phase variable and time delay variable The method of claim 3, wherein The variable controller performs the function of controlling and adjusting the amplitude variable, the phase variable and the time delay variable, and the variable controller comprising an input signal controller, an amplitude controller, a phase controller, a time delay unit and an output signal controller. Signal Eliminators Included The method of claim 1, The demodulated signal is directly demodulated without using a means such as a downconversion device for downconverting the high frequency RF signal received by a corresponding signal generator that generates a signal having the same amplitude, inverse phase and time delay as the signal to be removed. Signal eliminator comprising a demodulator for transmitting to the converter The method of claim 1, Direct modulation without using a means such as an upconversion device that DA-converts signals of the same amplitude, inverse phase, and the same time delay generated by the variable controller, and then upconverts them to high-frequency RF signals before transmitting them to the coupling point of the signal combiner. Signal canceller comprising a modulator characterized in that it uses a direct modulation technique so as to be the same model as the original signal or the signal to be removed. The method of claim 1, The adaptive state monitoring control means monitors the status of various points in the system, analyzes the state of the monitoring point by using the monitoring data, and compares the input / output signals with each other for the amplitude, phase, and time delay variables to be removed. Signal canceller comprising an error signal extractable, characterized in that it has an error signal extraction function for recognizing information The method of claim 7, wherein The error signal extraction function of the adaptive state monitoring controller includes a method, means, and algorithm for separating a desired signal including an information signal and an unwanted signal not including an information signal from a received signal by mixing a desired signal with an unwanted signal. Signal eliminator, characterized in that The method of claim 1, The adaptive state monitoring controller tracks and captures the amplitude, phase, and time delay variables of the input / output signals in real time by adapting the characteristics of the input / output signals that continuously change with time in response to internal / external environmental changes. Signal canceller including adaptive state monitoring controller, characterized in that it has a function of extracting / generating data The method of claim 1, The adaptive state monitoring controller includes means, methods and algorithms for extracting unnecessary signals, i.e., interference noises, which do not contain information to extract and remove interference noises that do not include information signals from analog high frequency envelope signals received by the system. Signal eliminator characterized in that The method of claim 1, The adaptive state monitoring controller uses amplitude noise, phase variable and time delay for each signal by using the interference noise extracted by the interference noise extraction means and the input signal information and output signal information extracted at the input and output points of the system. Analyze the variable to generate the real-time adaptive control signal using the adaptive algorithm to have the optimal elimination performance, and monitor and supervise and control the control variable to have the optimal signal elimination performance using the generated control signal Signal eliminator comprising a function to The method of claim 1, A detailed component of the corresponding signal generator is a signal canceller comprising a demodulator, an AD converter, a variable regulator, a DA converter, and a modulator. The method of claim 1, In the component of the corresponding signal generator, the variable controller comprises an input signal controller, an amplitude controller, a phase controller, a time delay unit and an output signal controller. The method of claim 1, The corresponding signal generator converts the RF analog signal input to the demodulator into a baseband analog signal, converts the converted baseband analog signal into a digital signal, adjusts the amplitude coefficient, compares / analyzes the time delay coefficient to an appropriate value. Adjust the phase so that the phase difference of 180 degrees occurs, convert the digital signal with the adjusted amplitude, phase, and time delay variable to the baseband analog signal, and convert the converted baseband analog signal from the modulator to the RF analog signal. Signal canceller, characterized in that to perform the function.