KR101092107B1 - RF Receiver, RF Transceiver System using the same and Method of RF Receiving - Google Patents

Abstract

An RF receiving apparatus, an RF transmitting and receiving system using an RF receiving apparatus, and an RF receiving method are provided. An RF receiving apparatus is a RF receiving apparatus for suppressing a blocker from a received first band RF signal, comprising: a blocker suppression calculator for suppressing a blocker in a first band RF signal received using the blocker suppression signal, a blocker suppressed agent Low noise amplifier for amplifying 1-band RF signal, oscillator for supplying reference signal, down-conversion mixer for converting amplified signal to second band signal using reference signal, and second band signal and reference signal It may be configured to include a blocker suppression signal generator for generating a blocker suppression signal. Therefore, the blocker can be effectively suppressed, so that the sensitivity and linearity of the RF receiver can be improved, and the sensitivity and linearity of the RF receiver can be more efficiently extracted from the RF receiver signal, and the desired information signal can be analyzed. can do.

RF Signals, Amplifiers, Oscillators, Mixers, Filters, Blockers, RFID Readers

Description

RF receiver, RF transceiver system and RF receiver using RF receiver, RF receiver system using the same and method of RF Receiving

The present invention relates to an RF receiving apparatus, an RF transmitting and receiving system using an RF receiving apparatus, and an RF receiving method, and more particularly, to an RF receiving apparatus for suppressing a blocker, an RF transmitting and receiving system using an RF receiving apparatus, and an RF receiving method. .

In general, the RF receiver refers to a device for down-converting an RF signal from an RF signal received through an antenna to a signal band for analysis. However, RF receivers inevitably generate unwanted interference signals or transmit carrier components (blockers), which are reflected inside the RF receiver, external reflections from the surrounding environment, and reflections from the antenna or It is formed by leakage and may also be formed by being introduced by the transmitted RF signal. Although not desired as described above, an interference signal or blocker formed inevitably serves as a major factor for degrading the performance of the RF receiver.

In addition, a general RF receiver uses a low noise amplifier to amplify a received signal. However, when a signal level of an interference signal or a blocker is large, an inflow of a signal outside the operating range of the low noise amplifier may occur, which is a burden on the low noise amplifier. This causes the reception sensitivity of the information signal of a relatively small signal level to decrease. Therefore, there is a need to suppress unwanted interference signals or blockers in order to improve the performance of the RF receiver.

In particular, a blocker is a signal generated by the inflow of a transmitted RF signal into a received RF signal and, unlike an unexpected interference signal, exists in a predictable range, and thus, an unwanted blocker is used to improve the performance of the RF receiver. There is a need to restrain. However, since the blocker has a characteristic of being present in the same or near frequency band as the desired information signal, there is a limit that the blocker cannot be suppressed by using a general filter.

In particular, in the case of an RF receiving device used in an RFID reader, a blocker generated by the inflow of a transmitting RF signal has a frequency of the same or similar band as that of the information signal, and the signal level of the blocker is higher than the level of the information signal to be analyzed. The much larger sensitivity inevitably lowers the sensitivity of the desired information signal, making the analysis of the information signal more difficult.

It is an object of the present invention to provide an RF receiving apparatus capable of suppressing a blocker.

Another object of the present invention is to provide an RF transmission / reception system using an RF reception apparatus capable of suppressing a blocker.

It is still another object of the present invention to provide an RF reception method capable of suppressing a blocker.

According to an embodiment of the present invention, an RF receiver apparatus suppresses a transmission carrier component (blocker) from a received first band RF signal. A blocker suppression calculator, comprising: a blocker suppression calculator for suppressing a blocker in the received first band RF signal using a blocker suppression signal; A low noise amplifier (LNA) for amplifying the blocker suppressed first band RF signal; An oscillator for supplying a reference signal; A downconversion mixer for converting the amplified signal into a second band signal using the reference signal; And a blocker suppression signal generator configured to generate the blocker suppression signal by using the second band signal and the reference signal.

Here, the blocker suppression calculator may be any one of an adder and a subtractor.

The blocker suppression signal generator may include: a low pass filter (LPF) for extracting a DC component by using the second band signal; And a signal generation mixer for generating the blocker suppression signal using the extracted direct current component and the reference signal.

The blocker suppression signal generator may include: a low pass filter (LPF) for extracting a DC component by using the second band signal; A signal generation mixer for generating a first temporary signal using the extracted DC component and the reference signal; And a phase adjuster for adjusting the phase of the first temporary signal to generate the blocker suppression signal.

The blocker suppression signal generator may include: a low pass filter (LPF) for extracting a DC component by using the second band signal; A phase adjuster generating a second temporary signal by adjusting a phase of the reference signal; And a signal generation mixer configured to generate the blocker suppression signal using the extracted direct current component and the second temporary signal.

Here, the second band may be a baseband, and the RF receiver may be a direct conversion receiver.

Here, the second band may be an intermediate frequency band, and the RF receiver may be a super heterodyne receiver.

Here, the RF receiver may be a receiver used for an RFID reader.

According to another aspect of the present invention, there is provided an RF transmission / reception system using an RF receiving apparatus, including: an antenna for transmitting and receiving a first band RF signal; A blocker suppression calculator for suppressing the blocker in the first band RF signal received from the antenna using a blocker suppression signal, and a low noise amplifier (LNA) for receiving and amplifying the blocker suppressed first band RF signal. ), An oscillator for supplying a reference signal, a downconversion mixer for converting the amplified signal to a second band signal using the reference signal, and the blocker receiving the second band signal and the reference signal An RF receiving apparatus including a blocker suppression signal generator for generating a suppression signal; A controller which performs signal processing on the converted second band signal and generates a second band signal for transmission; And an RF transmitter for generating a first band RF signal for transmission using the second band signal for transmission and providing the first band RF signal to the antenna.

Here, the blocker suppression calculator may be any one of an adder and a subtractor.

The blocker suppression signal generator may include: a low pass filter (LPF) for extracting a DC component by using the second band signal; And a signal generation mixer for generating the blocker suppression signal using the extracted direct current component and the reference signal.

The blocker suppression signal generator may include: a low pass filter (LPF) for extracting a DC component by using the second band signal; A signal generation mixer for generating a first temporary signal using the extracted DC component and the reference signal; And a phase adjuster for adjusting the phase of the first temporary signal to generate the blocker suppression signal.

The blocker suppression signal generator may include: a low pass filter (LPF) for extracting a DC component by using the second band signal; A phase adjuster generating a second temporary signal by adjusting a phase of the reference signal; And a signal generation mixer configured to generate the blocker suppression signal using the extracted direct current component and the second temporary signal.

Here, the second band may be a baseband, and the RF receiver may be a direct conversion receiver.

Here, the second band may be an intermediate frequency band, and the RF receiver may be a super heterodyne receiver.

Here, the RF transmission and reception system may be an RFID reader.

RF reception method according to an embodiment of the present invention for achieving another object of the present invention described above is to suppress the transmission carrier component (blocker) from the received first band RF signal (blocker) A receiving method, comprising: receiving a second band signal and a reference signal of which the first band RF signal is down-converted; Generating a blocker suppression signal using the second band signal and the reference signal; And suppressing the blocker in the first band RF signal using the blocker suppression signal.

The generating of the blocker suppression signal using the second band signal and the reference signal may include extracting a DC component using the second band signal; And generating a blocker suppression signal using the reference signal and the direct current component.

The generating of the blocker suppression signal using the second band signal and the reference signal may include extracting a DC component using the second band signal; Generating a first temporary signal using the reference signal and the direct current component; And generating a blocker suppression signal by adjusting a phase of the first temporary signal.

The generating of the blocker suppression signal using the second band signal and the reference signal may include extracting a DC component using the second band signal; Generating a second temporary signal by adjusting a phase of the reference signal; And generating a blocker suppression signal using the second temporary signal and the DC component.

The generating of the blocker suppression signal using the second band signal and the reference signal may include generating a second temporary signal by adjusting a phase of the reference signal; And extracting a direct current component using the second band signal. And generating a blocker suppression signal using the second temporary signal and the DC component.

According to the RF receiving apparatus, the RF transmitting and receiving system using the RF receiving apparatus, and the RF receiving method according to the present invention, since the blocker can be effectively suppressed, the sensitivity and linearity of the RF receiving apparatus can be improved, and the RF By improving the sensitivity and linearity of the receiving device, it is possible to extract the desired information signal from the RF received signal more efficiently and to analyze the desired information signal.

As the present invention allows for various changes and numerous embodiments, particular embodiments will be illustrated in the drawings and described in detail in the written description.

However, this is not intended to limit the present invention to specific embodiments, it should be understood to include all changes, equivalents, and substitutes included in the spirit and scope of the present invention.

The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as the second component, and similarly, the second component may also be referred to as the first component. And / or < / RTI > includes any combination of a plurality of related listed items or any of a plurality of related listed items.

When a component is said to be "connected" or "connected" to another component, it may be directly connected to or connected to that other component, but it may be understood that another component may exist in between. Should be. On the other hand, when a component is said to be "directly connected" or "directly connected" to another component, it should be understood that there is no other component in between.

The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting of the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, the terms "comprise" or "have" are intended to indicate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, and one or more other features. It is to be understood that the present invention does not exclude the possibility of the presence or the addition of numbers, steps, operations, components, components, or a combination thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art. Terms such as those defined in the commonly used dictionaries should be construed as having meanings consistent with the meanings in the context of the related art, and shall not be construed in ideal or excessively formal meanings unless expressly defined in this application. Do not.

Hereinafter, with reference to the accompanying drawings, it will be described in detail a preferred embodiment of the present invention. In the following description of the present invention, the same reference numerals are used for the same elements in the drawings and redundant descriptions of the same elements will be omitted.

1 is a block diagram illustrating an RF receiver according to an embodiment of the present invention.

Referring to FIG. 1, an RF receiver according to an embodiment of the present invention is a blocker in an RF receiver that suppresses a transmission carrier component (blocker) from a received first band RF signal. A blocker suppression calculator for suppressing a blocker in the received first band RF signal using a suppression signal; A low noise amplifier (LNA) for amplifying the blocker suppressed first band RF signal; An oscillator for supplying a reference signal; A downconversion mixer for converting the amplified signal into a second band signal using the reference signal; And a blocker suppression signal generator configured to generate the blocker suppression signal by using the second band signal and the reference signal.

First, the blocker suppression calculator 110 may be any one of an adder and a subtractor. The adder is for obtaining one output signal from two or more types of input signals, and means adding two types of input signals to each other. The subtractor is also for obtaining one output signal from two or more input signals and subtracting one input signal from another input signal. Since the first band RF signal received through the antenna is a mixed signal of a blocker generated by the inflow of the first band information signal and a transmission signal to be received, the first band RF signal is viewed as one input signal, and the blocker suppression signal generator 150 By using the blocker suppression signal generated by the other input signal, the first band RF signal is a blocker suppression signal generated from a mixed signal of the blocker generated by the inflow of the first band information signal and the transmission signal to be received. It may be a subtractor to subtract. Or an adder for adding. Through this, it is possible to efficiently extract the first band information signal to be received.

For example, the first band RF signal is a mixture of a first band information signal to be received and a blocker introduced from an RF transmitter configured with the RF receiver, and for efficiently extracting the first band information signal. The blocker suppression calculator 110 may subtract the blocker suppression signal having the same magnitude, frequency, and phase as the blocker generated by the blocker suppression signal generator 150. In addition, when the signal generated by the blocker suppression signal generation unit 150 has the same frequency and phase as the blocker but the magnitude is the same as the negative value, the positive signal may be added to each other. Therefore, the blocker may be suppressed or eliminated from the first band RF signal, and the first band information signal to be received may be efficiently extracted.

Next, the low noise amplifier in the low noise amplifier 120 is a high frequency amplifier, which is generally made for the purpose of lowering the noise figure of the receiving device. In order to amplify the noise while receiving a small input signal in a communication line having a large propagation loss, etc. It is used. BACKGROUND With the recent development of semiconductor technology, various low noise amplifiers are used. The low noise amplifier 120 is used for the purpose of amplifying the first band RF signal suppressed by the blocker in the blocker suppression calculator 110.

For example, the blocker suppression calculator 110 efficiently extracts the first band information signal, but the low noise amplifier may be used to amplify the first band information signal while lowering the noise figure. There will be.

Next, the oscillator 130 is a frequency providing device used to convert the frequency of the signal, serves to provide a reference frequency of the reference signal in a typical RF transceiver. The frequency of the first band information signal can be down-converted using the reference frequency of the reference signal provided by the oscillator 130. As a result, the oscillator 130 may serve to provide a reference frequency for downconverting the amplified signal passed through the low noise amplifier 120.

Next, since the mixer in the downconversion mixer 140 is to obtain one output signal from two or more input signals as described above, the downconversion mixer 140 uses the reference signal provided from the oscillator 130. To downconvert the signal amplified by the low noise amplifier 120 to a second band signal. By downconversion of the amplified signal to the second band, signal processing may be performed on a signal converted from a subsequent component (not shown) to the second band.

Next, the blocker suppression signal generator 150 receives the second band signal converted by the downconversion mixer 140 and the reference signal from the oscillator 130 to generate a blocker suppression signal. The blocker suppression signal is used to suppress the blocker in the blocker suppression calculator 110. The signal having the same magnitude, frequency, and phase as the blocker or the blocker is the same signal with the same frequency and phase and the magnitude is negative. . As a result, the blocker suppression signal generator 150 may be for generating a blocker suppression signal for suppressing the blocker.

Next, in the RF receiver, the second band is a baseband, the RF receiver may be a direct conversion receiver, and in the RF receiver, the second band is an intermediate frequency band. The RF receiver may be a super heterodyne receiver.

For example, when the RF receiver is a direct conversion receiver, the blocker is a signal having a frequency corresponding to the reference frequency of the reference signal. It will remain either a direct current component or a low frequency component. Therefore, when the amplified signal is converted into the second band through the downconversion mixer 140, the blocker may be separated into a second band information signal having a frequency characteristic different from the converted DC component or low frequency component. will be. As a result, the blocker suppression signal generating unit 150 has the same frequency and phase as the blocker and has the same absolute value as the blocker by using the DC component or the low frequency component of the blocker that has passed through the downconversion mixer 140. The blocker suppression calculator 110 may suppress the blocker by adding or subtracting the generated blocker suppression signal.

In addition, the RF receiver may be a receiver used for an RFID reader. That is, the RF receiving device may be a device for receiving a signal of a tag in the RFID reader as a component of the RFID reader.

2 is a block diagram illustrating a blocker suppression signal generator in an RF receiver according to an embodiment of the present invention.

2, a blocker suppression signal generation unit in an RF receiver according to an embodiment of the present invention may include a low pass filter (LPF) for extracting a DC component using the second band signal; And a signal generation mixer for generating the blocker suppression signal using the extracted direct current component and the reference signal.

First, in the low pass filter 251, a general low pass filter may be implemented in the simplest form, and may be referred to as a basic type of all filters. The low pass filter 251 is used to filter out a high frequency signal and extract only a low frequency required signal Filter. As a result, the low pass filter 251 may be used to receive the second band signal and extract a DC component that is a DC offset from the second band signal.

Next, the signal generation mixer 252 generates the blocker suppression signal by using the DC component extracted by the low pass filter 251 and the reference signal provided by the oscillator 230, which is a phase of the blocker. This may be useful when the phase of the reference frequency of the reference signal provided by the oscillator 230.

3 is a block diagram illustrating a blocker suppression signal generator in an RF receiver according to another embodiment of the present invention.

Referring to FIG. 3, a blocker suppression signal generation unit in an RF receiver according to another embodiment of the present invention uses a low pass filter (LPF) to extract a DC component using the second band signal; A signal generation mixer for generating a first temporary signal using the extracted DC component and the reference signal; And a phase adjuster for adjusting the phase of the first temporary signal to generate the blocker suppression signal.

First, the low pass filter 351 may be used to receive the second band signal and extract a DC component that is a DC offset from the second band signal as described above.

Next, the signal generation mixer 352 is to generate a first temporary signal by using the DC component extracted by the low pass filter 351 and the reference signal provided by the oscillator 330. A signal is a signal that has the same frequency as the blocker and the same magnitude as the absolute value.

Next, the phase adjuster 353 refers to generating a blocker suppression signal for suppressing the blocker by adjusting a phase of the generated first temporary signal. In other words, a blocker suppression signal is generated which has the same frequency and phase as the blocker and has the same absolute value of magnitude. The generated blocker suppression signal may be used to suppress the blocker in the blocker removal mixer 110 described above.

4 is a block diagram illustrating a blocker suppression signal generator in an RF receiver according to another embodiment of the present invention.

4, a blocker suppression signal generation unit in an RF receiver according to another embodiment of the present invention includes a low pass filter (LPF) for extracting a DC component using the second band signal; A phase adjuster generating a second temporary signal by adjusting a phase of the reference signal; And a signal generation mixer configured to generate the blocker suppression signal using the extracted direct current component and the second temporary signal.

First, the low pass filter 451 may be used as a filter as described above to receive the second band signal and extract a DC component that is a DC offset from the second band signal.

Next, the phase adjuster 453 is a device for generating a second temporary signal by adjusting the phase of the reference signal provided by the oscillator 430. The second temporary signal is a signal having a transient nature for producing a blocker suppression signal, and may be a signal having the same frequency and phase as the blocker.

Next, the signal generation mixer 452 combines the DC component extracted by the low pass filter 451 and the second temporary signal generated by the phase adjuster 453 to generate a blocker suppression signal for suppressing the blocker. Say that. As described above, a blocker suppression signal having the same blocker, frequency, and phase and having the same absolute value of magnitude is generated. The generated blocker suppression signal may be used to suppress the blocker in the blocker removal mixer 110 described above.

5 is a block diagram illustrating an RF transmission and reception system according to an embodiment of the present invention.

5, the RF transmission and reception system according to an embodiment of the present invention includes an antenna for transmitting and receiving a first band RF signal; A blocker suppression calculator for suppressing the blocker in the first band RF signal received from the antenna using a blocker suppression signal, and a low noise amplifier (LNA) for receiving and amplifying the blocker suppressed first band RF signal. ), An oscillator for supplying a reference signal, a downconversion mixer for converting the amplified signal to a second band signal using the reference signal, and the blocker receiving the second band signal and the reference signal An RF receiving apparatus including a blocker suppression signal generator for generating a suppression signal; A controller which performs signal processing on the converted second band signal and generates a second band signal for transmission; And an RF transmitter for generating a first band RF signal for transmission using the second band signal for transmission and providing the first band RF signal to the antenna.

First, the antenna 510 is a converter for transmitting or receiving electromagnetic waves of a specific band. The antenna converts an electric signal into an electromagnetic wave or vice versa. Physically, an array of conductors that radiate an electromagnetic field that occurs when a voltage is applied along with a modulated current, in which current and voltage induced between antennas are induced between the ends of the antenna. As a result, the antenna 510 transmits or receives a first band RF signal used for information exchange with another system in the RF transmission / reception system 500 and converts the first band RF signal into an electrical signal. Can be.

Next, the RF receiver 520 receives a blocker suppression calculator for suppressing the blocker in the first band RF signal received from the antenna using the blocker suppression signal, and receives and amplifies the first band RF signal in which the blocker is suppressed. A low noise amplifier (LNA), an oscillator for supplying a reference signal, a downconversion mixer for converting the amplified signal to a second band signal using the reference signal, and the second band And a blocker suppression signal generator configured to receive a signal and the reference signal to generate the blocker suppression signal.

Here, the blocker suppression operator may be any one of an adder and a subtractor. Since the first band RF signal received through the antenna is a mixed signal of the blocker generated by the inflow of the first band information signal and the transmission signal to be received, the first band RF signal is viewed as one input signal and generated by the blocker suppression signal generator. By using the blocker suppression signal as another input signal, the first band RF signal subtracts the blocker suppression signal generated from the mixed signal of the blocker generated by the inflow of the first band information signal and the transmission signal to be received. It may be a subtractor. Or an adder for adding. Through this, it is possible to efficiently extract the first band information signal to be received.

The blocker suppression signal generator may include: a low pass filter (LPF) for extracting a DC component by using the second band signal; And a signal generation mixer for generating the blocker suppression signal using the extracted direct current component and the reference signal.

The blocker suppression signal generator may include: a low pass filter (LPF) for extracting a direct current component using the second band signal; A signal generation mixer for generating a first temporary signal using the extracted DC component and the reference signal; And a phase adjuster for adjusting the phase of the first temporary signal to generate the blocker suppression signal.

The blocker suppression signal generator may include: a low pass filter (LPF) for extracting a direct current component using the second band signal; A phase adjuster generating a second temporary signal by adjusting a phase of the reference signal; And a signal generation mixer configured to generate the blocker suppression signal using the extracted direct current component and the second temporary signal.

In addition, the second band is a baseband, the RF receiver may be a direct conversion (Direct Conversion) receiver, the second band is an intermediate frequency band, the RF receiver is a super heterodyne (Super Heterodyne) It may be a receiving device. In addition, the RF transmission and reception system may be an RFID reader.

Next, the controller 530 performs signal processing on the converted second band signal and generates a second band signal for transmission, and identifies the down-converted second band signal as a reception information signal. The signal processing may be performed, and the signal processing for providing information to the second band signal may be performed to transmit the information signal for transmission.

Next, the RF transmitting device 540 receives the second band signal for transmission from the control unit 530 and converts it into a first band RF signal for transmission to provide the antenna 510. That is, the second band signal to be transmitted is converted into the first band signal by the RF transmitter 540 and transmitted through the antenna 510.

6 is a flowchart illustrating an RF receiving method according to an embodiment of the present invention.

Referring to FIG. 6, the RF reception method according to an embodiment of the present invention is an RF reception method for suppressing a transmission carrier component (blocker) from a received first band RF signal. Receiving a second band signal and a reference signal of which the first band RF signal is down-converted; Generating a blocker suppression signal using the second band signal and the reference signal; And suppressing the blocker in the first band RF signal using the blocker suppression signal.

First, the step of receiving the second band signal and the reference signal down-converted the first band RF signal (S610) provides the second band signal is frequency down-converted through the down-conversion mixer, etc. In addition, it may be a step of receiving a reference frequency signal provided from an oscillator or the like.

Next, generating a blocker suppression signal using the second band signal and the reference signal (S620) may include extracting a DC component using the second band signal; And generating a blocker suppression signal using the reference signal and the direct current component.

The generating of the blocker suppression signal using the second band signal and the reference signal may include extracting a direct current component using the second band signal; Generating a first temporary signal using the reference signal and the direct current component; And generating a blocker suppression signal by adjusting a phase of the first temporary signal.

The generating of the blocker suppression signal using the second band signal and the reference signal may include extracting a direct current component using the second band signal; Generating a second temporary signal by adjusting a phase of the reference signal; And generating a blocker suppression signal using the second temporary signal and the DC component.

The generating of the blocker suppression signal using the second band signal and the reference signal (S620) may include generating a second temporary signal by adjusting a phase of the reference signal; And extracting a direct current component using the second band signal. And generating a blocker suppression signal using the second temporary signal and the DC component.

Here, the blocker suppression signal is used to suppress the blocker, and a signal having the same magnitude, frequency, and phase as the blocker, or a signal having the same frequency and phase as the blocker and having a negative magnitude, refers to the same signal.

As a result, although there is a difference in the configuration according to the order of the sub-steps in the step S620 of generating the blocker suppression signal using the second band signal and the reference signal, the above-described methods use the second band signal and the reference signal. As a method of generating a blocker suppression signal is described, it will be apparent to those skilled in the art that various methods for generating a blocker suppression signal using the second band signal and the reference signal are possible.

Next, the step (S630) of suppressing the blocker in the first band RF signal using the blocker suppression signal adds the generated blocker suppression signal and the first band RF signal including the blocker to each other. Alternatively, the blocker may be suppressed in the first band RF signal through a subtractor. Here, the generated blocker suppression signal is used to suppress the blocker, and a signal having the same magnitude, frequency, and phase as the blocker, or a signal having the same frequency and phase as the blocker and having a negative magnitude, refers to the same signal.

Although described with reference to the above embodiments, those skilled in the art can understand that the present invention can be variously modified and changed without departing from the spirit and scope of the invention described in the claims below. There will be.

1 is a block diagram illustrating an RF receiver according to an embodiment of the present invention.

2 is a block diagram illustrating a blocker suppression signal generator in an RF receiver according to an embodiment of the present invention.

3 is a block diagram illustrating a blocker suppression signal generator in an RF receiver according to another embodiment of the present invention.

4 is a block diagram illustrating a blocker suppression signal generator in an RF receiver according to another embodiment of the present invention.

5 is a block diagram illustrating an RF transmission and reception system according to an embodiment of the present invention.

6 is a flowchart illustrating an RF receiving method according to an embodiment of the present invention.

<Description of Symbols for Main Parts of Drawings>

110: blocker suppression calculator 120: low noise amplifier

130, 230, 330, 430: Oscillator 140: Downconversion Mixer

150, 250, 350, 450: blocker suppression signal generator

251, 351, 451: low pass filter

252, 352, 452: signal generator

353, 453: phase adjuster

410: antenna 420: RF receiver

430: control unit 440: RF transmitter

Claims (21)

An RF receiving apparatus for suppressing a transmission carrier component (blocker) from a received first band RF signal, A blocker suppression calculator for suppressing the blocker in the received first band RF signal using a blocker suppression signal having the same frequency as the blocker and having one frequency component; A low noise amplifier (LNA) for amplifying the first band RF signal in which the blocker is suppressed; An oscillator for supplying a reference signal; A downconversion mixer for converting the amplified signal into a second band signal using the reference signal; And A blocker suppression signal generator configured to generate the blocker suppression signal having the same frequency as the blocker and having one frequency component using the second band signal and the reference signal, The blocker suppression signal generator, A low pass filter (LPF) for extracting a DC component of the blocker converted to the second band; And And a signal generation mixer for generating the blocker suppression signal having the same frequency as that of the blocker and having one frequency component by using the extracted DC component and the reference signal. . The method of claim 1, And the blocker suppression calculator is one of an adder and a subtractor. delete The method of claim 1, The blocker suppression signal generator A low pass filter (LPF) for extracting a DC component of the blocker converted to the second band; A signal generation mixer for generating a first temporary signal having only a phase difference from the blocker by using the extracted DC component of the blocker and the reference signal; And And a phase adjuster for adjusting the phase of the first temporary signal to generate the blocker suppression signal having the same frequency as the blocker and having one frequency component. The method of claim 1, The blocker suppression signal generator A low pass filter (LPF) for extracting a DC component of the blocker converted to the second band; A phase adjuster generating a second temporary signal by adjusting a phase of the reference signal; And And a signal generation mixer configured to generate the blocker suppression signal having the same frequency as that of the blocker and having one frequency component by using the extracted DC component and the second temporary signal. Device. The method of claim 1, And the second band is a baseband, and the RF receiving device is a direct conversion receiving device. The method of claim 1, And the second band is an intermediate frequency band, and the RF receiver is a super heterodyne receiver. The method of claim 1, The RF receiving device is an RF receiving device, characterized in that the receiving device used for the RFID reader. An antenna for transmitting and receiving a first band RF signal; A blocker suppression calculator for suppressing the blocker in the first band RF signal received from the antenna by using a blocker suppression signal having the same frequency as the blocker and having one frequency component, and inputting the blocker suppressed first band RF signal A low noise amplifier (LNA) for receiving and amplifying, an oscillator for supplying a reference signal, a downconversion mixer for converting the amplified signal to a second band signal using the reference signal, and the An RF receiver configured to receive a second band signal and the reference signal and include a blocker suppression signal generator for generating the blocker suppression signal having the same frequency as the blocker and having one frequency component; A controller which performs signal processing on the converted second band signal and generates a second band signal for transmission; And And an RF transmitter for generating a first band RF signal for transmission using the second band signal for transmission and providing the first band RF signal to the antenna. The blocker suppression signal generator, A low pass filter (LPF) for extracting a DC component of the blocker converted to the second band; And And a signal generation mixer for generating the blocker suppression signal having the same frequency as that of the blocker and having one frequency component by using the extracted DC component and the reference signal. . 10. The method of claim 9, And the blocker suppression operator is one of an adder and a subtractor. delete 10. The method of claim 9, The blocker suppression signal generator A low pass filter (LPF) for extracting a DC component of the blocker converted to the second band; A signal generation mixer for generating a first temporary signal having only a phase difference from the blocker by using the extracted DC component and the reference signal; And And a phase adjuster for adjusting the phase of the first temporary signal to generate the blocker suppression signal having the same frequency as the blocker and having one frequency component. 10. The method of claim 9, The blocker suppression signal generator A low pass filter (LPF) for extracting a DC component of the blocker converted to the second band; A phase adjuster generating a second temporary signal by adjusting a phase of the reference signal; And And a signal generation mixer configured to generate the blocker suppression signal having the same frequency as that of the blocker and having one frequency component by using the extracted DC component and the second temporary signal. system. 10. The method of claim 9, And the second band is a baseband, and the RF receiving device is a direct conversion receiving device. 10. The method of claim 9, And the second band is an intermediate frequency band, and the RF receiver is a super heterodyne receiver. 10. The method of claim 9, The RF transmission and reception system is an RF transceiver system, characterized in that the RFID reader. An RF receiving method for suppressing a transmission carrier component (blocker) from a received first band RF signal, Receiving a second band signal and a reference signal of which the first band RF signal is down-converted; Generating the blocker suppression signal having the same frequency as the blocker and having one frequency component using the second band signal and the reference signal; And Suppressing the blocker in the first band RF signal using the blocker suppression signal, Generating the blocker suppression signal having the same frequency as the blocker and having one frequency component using the second band signal and the reference signal, Extracting a DC component of the blocker converted to the second band; And And generating the blocker suppression signal having the same frequency as the blocker and having one frequency component by using the reference signal and the extracted DC component of the blocker. delete The method of claim 17, Generating the blocker suppression signal having the same frequency as the blocker and having one frequency component using the second band signal and the reference signal, Extracting a DC component of the blocker converted to the second band; Generating a first temporary signal having only a phase difference from the blocker by using the reference signal and the extracted DC component of the blocker; And Adjusting the phase of the first temporary signal to generate the blocker suppression signal having the same frequency as the blocker and having one frequency component. The method of claim 17, Generating the blocker suppression signal having the same frequency as the blocker and having one frequency component using the second band signal and the reference signal, Extracting a DC component of the blocker converted to the second band; Generating a second temporary signal by adjusting a phase of the reference signal; And Generating the blocker suppression signal having the same frequency as the blocker and having one frequency component using the second temporary signal and the extracted direct current component of the blocker. delete

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