KR102099602B1 - A detection system for inout-output signal in 5g milimeter wave bandwidth - Google Patents

Abstract

The present invention relates to a detection system for double detection of input and output signals in a 5G millimeter wave band. More particularly, the present invention relates to a detection system for double detection of input and output signals in a 5G millimeter wave band, which separates a transmission signal and a reception signal of a radio frequency (RF) signal in millimeter band used in a 5^th generation (5G) mobile communication network operated by a time division duplexing (TDD) method, changes the frequency of each signal upward or downward to have the same frequency as that of a modem, and ensures that monitoring and inspection of communication equipment is always possible during standby or when RF signals are transmitted and received. According to the present invention, it is possible to constantly monitor the normal operation of equipment by accurately detecting the output of the signals transmitted and received in the TDD communication equipment using one antenna for both transmission and reception.

Description

A detection system for double detection of input / output signals in the 5G millimeter wave band {A DETECTION SYSTEM FOR INOUT-OUTPUT SIGNAL IN 5G MILIMETER WAVE BANDWIDTH}

The present invention relates to a detection system for double detection of input / output signals in the 5G millimeter wave band, and more specifically, the transmission signal of the millimeter band RF signal used in the 5th generation (5G) mobile communication network operated by the TDD method. 5G millimeter wave that separates the received signal, changes the frequency of each signal up or down to have the same frequency as that of the modem, and enables monitoring or inspection of communication equipment at all times during standby or when transmitting and receiving RF signals. It relates to a detection system for double detection of the input and output signals of the band.

When using a repeater for the purpose of resolving shadow areas in a TDD (Time Division Duplexing) communication network using the same frequency of the uplink and downlink of the RF signal, the conventional RF repeater operating between the base station and the terminal transmits the base station's transmission time. And it operates to activate the downlink from the base station of the repeater to the terminal and the uplink from the terminal to the base station by accurately predicting the terminal transmission time.

1 is a configuration diagram of a conventional RF repeater for TDD in which some downlink and uplink paths are shared, and FIG. 2 is a configuration diagram of a conventional RF repeater for TDD in which the downlink and uplink paths are separated.

The RF repeater as shown in FIG. 1 or 2 can be configured by sharing some downlink and uplink paths, and the downlink and uplink can be configured to be separated. Share the antenna. In addition, the downlink path connects the sync detection module to accurately locate the base station and terminal transmission time by referring to the message sent from the base station, and based on this, the downlink and uplink of the RF repeater at the base station and terminal transmission time In order to activate the, drive the switch mounted on the path.

However, in the related art, a repeater can be implemented by relying on a switching and synchronous detection module, but the use of the synchronous detection module has a problem in that the system is very expensive and has low reliability.

In addition, in the case of transmitting and receiving a transmission signal and a reception signal using one antenna, it is possible to operate a stable repeater only by separating the paths so that the respective signals are isolated from each other. However, in the prior art, the transmission and reception paths of these signals overlap. .

KR 10-2007-0077715 A

The present invention for solving the above-mentioned problems is to branch a part of the transmission signal transmitted from the modem to the antenna, the frequency is down-converted by the mixer to convert to the same frequency as the modem input signal, and input to the control unit to output the transmission signal. An object of the present invention is to provide a detection system for dually detecting input / output signals in a 5G millimeter wave band to control the operation of the variable attenuator by sensing.

In addition, a part of the received signal received from the antenna is branched, a transmission signal and a path are separated using a switch, and downconverted to the same frequency as the modem input signal, and then input to a control unit to control the operation of the variable attenuator. It is an object of the present invention to provide a detection system for double detection of input / output signals of a wave band.

The present invention was devised to solve the above-mentioned problems, and separates the transmission signal and the reception signal of the RF signal in the millimeter band used in the 5th generation (5G) mobile communication network operated by the TDD method, and the transmission signal and the reception signal of the A detection system that monitors the state of communication equipment by measuring output level and frequency, comprising: a first switch (104) for selectively determining a transmission path of a synchronization signal and an RF signal output from a modem (102); A first coupler (108) for branching a portion of the synchronization signal and the RF signal transmitted from the first switch (104) and transmitting them to the control unit (106); A first RF signal detector (118) that generates a first detection signal by detecting the output level and frequency of the RF signal branched from the first coupler (108) and transmits the first detection signal to the control unit (118) )Wow; A first variable attenuator (112) for controlling the output level of the RF signal passing through the first coupler (108); A first mixer 124 for up-converting the frequency of the RF signal passing through the first variable attenuator 112 according to the frequency of the signal input from the local oscillator 128; A circulator 136 for determining a transmission path of the RF signal whose frequency is increased while passing through the first mixer 124; It includes an antenna 142 for transmitting the RF signal transmitted from the circulator 136, the control unit 106 checks the output level of the transmission signal from the first detection signal, the stored reference value It is characterized in that the output level of the RF signal is changed by controlling the first variable attenuator 112.

A fourth coupler 140 for branching a part of the input signal received through the antenna 142; A second mixer 126 for down-converting the frequency of the input signal input through the fourth coupler 140 and the circulator 136 according to the frequency of the signal input from the local oscillator 128; And a second variable attenuator 114 that controls the output level of the input signal that has passed through the second mixer 126.

A third coupler 138 for branching a portion of the input signal that has passed through the fourth coupler 140; A third mixer 146 that converts the frequency of the input signal that has passed through the third coupler 138 to the same frequency as that of the RF signal output from the modem 102; A fourth mixer 148 for converting the frequency of the input signal branched from the fourth coupler 140 to be the same as the frequency of the RF signal output from the modem 102; Detecting the output level and frequency of the input signal input to the third mixer 146 and the fourth mixer 148 to generate a second detection signal, and transmitting the second detection signal to the control unit 106 2RF signal detector 152, the control unit 106 checks the output level of the input signal from the second detection signal, compares the output level with a stored reference value, and the second variable attenuator ( It characterized in that the output level of the input signal is changed by controlling 114).

According to the present invention, the output of signals transmitted and received in a time division transmission (TDD) communication device using one antenna for both transmission and reception is accurately sensed, and there is an effect of constantly monitoring whether the device is operating normally.

1 is a configuration diagram of a conventional RF repeater for TDD in which some downlink and uplink paths are shared.
Figure 2 is a conventional downlink and uplink path TDD RF repeater configuration diagram.
3 is a block diagram showing the structure of a detection system according to an embodiment of the present invention.
4 is a block diagram showing the flow of a transmission signal.
5 is a block diagram showing the flow of a received signal.
6 is a block diagram showing the internal structure of the control unit.
7 is a graph showing a state of change in the output level and frequency of a transmission signal.
8 is a graph showing a state of change in the output level and frequency of a received signal.
9 is a block diagram showing the structure of a detection system according to another embodiment.
10 is a block diagram showing the structure of a detection system according to another embodiment.

Hereinafter, a "sensing system for dually detecting input / output signals in a 5G millimeter wave band" according to an embodiment of the present invention will be described with reference to the drawings (hereinafter referred to as a 'sensing system').

3 is a block diagram showing the structure of a detection system according to an embodiment of the present invention, FIG. 4 is a block diagram showing a flow of a transmission signal, FIG. 5 is a block diagram showing a flow of a received signal, and FIG. 6 is an interior of a control unit A block diagram showing the structure, FIG. 7 is a graph showing the state of change of the output level and frequency of the transmission signal, and FIG. 8 is a graph showing the state of change of the output level and frequency of the received signal.

The detection system 100 of the present invention is used to easily implement a TDD communication network in a 5G millimeter wave band.

In the case of the RF signal in the millimeter wave band, it is difficult to detect the transmission signal (TX) and the reception signal (RX) because the frequency is high. To easily detect this, the mixer of the transmission signal path and the mixer of the reception signal path are local to each of the oscillators. It is a feature of the present invention that the signal is distributed and the detection of the signal is facilitated by down-converting the target RF signal to a low frequency.

In addition, in order to facilitate the transmission and reception of millimeter wave bands in wireless communication networks, which are increasingly used daily, and to solve the difficulties in realizing the performance of millimeter wave bands, two RF signal sensors are applied to transmit and receive signals in the same band. It was made possible to apply to and receive paths at the same time, and it was possible to check the equipment at all times when the wireless communication equipment is in a waiting state for transmission / reception or in operation.

The detected RF signal in the millimeter wave band is controlled to have the same frequency as the transmitted and received signals input and output from the modem 102, and for this purpose, the frequency table of the signal sensor is used in the same manner.

In the case of the RF signal received from the antenna 142, when the output of the input signal is low, a low-noise amplifier (LNA) is added to detect a low-level signal, and an additional LNA AGC is added to the level of the received signal. It can also be configured to be able to detect by controlling accordingly.

The operation of the detection system 100 in the signal transmission path will be described first.

When the synchronization signal and the RF signal are output from the modem 102 when the RF signal is transmitted, the synchronization signal is input to the control unit 106 and is used as a reference for detection and output control of the RF signal according to the synchronization signal.

In addition, the RF signal transmitted through the transmission path is partially branched while passing through the first coupler 108, is input to the first divider 116 and the first RF signal detector 118, and the first RF signal detector 118. The detected detection signal is input to the control unit 106. In the present invention, the detection signal generated by the first RF signal detector 118 is defined as a first detection signal. The control unit 106 checks the output level of the transmission signal from the first detection signal, compares it with a reference value, and controls the first variable attenuator 112 to control the input level of the transmission signal.

In the signal transmission path, the first switch 104 is installed between the modem 102 and the first coupler 108 to change the signal transmission / reception path.

The first RF signal detector 118 receives a received signal input from a reception path, and the first RF signal detector 118 checks the output level of the received signal and transmits it to the control unit 106.

The transmission signal whose output level is controlled by the first variable attenuator 112 increases as the output goes through the first amplifier 120, and the frequency is converted upward by the local oscillator 128 while passing through the first mixer 124. do. Then, after the output is finally amplified by the third amplifier 130, a part of the signal branches off while passing through the third coupler 138 through the circulator 136. Some of the branched signals become detection signals for controlling the output of the signals and are input to the third mixer 146, and the detection signals are converted to the same frequency as the input signals from the modem 102. Then, it is input to the second RF signal sensor 152 through the second divider 150, and after passing through the second RF signal sensor 152, it is input to the control unit 106.

For the detection signal extracted from the transmission signal, the control unit 106 detects the output level, and controls the first variable attenuator 112 according to the detected output level to control the output level of the input signal. As a result, two detection values are generated at the input terminal and the output terminal, and the output level of the RF signal during transmission is controlled using the two detection values, which is applied equally to the reception of the signal.

Meanwhile, the operation of the detection system 100 in the signal reception path is as follows.

When receiving the RF signal, when the synchronization signal and the input signal are input from the modem 102, the synchronization signal is input to the control unit 106. The control unit 106 detects the RF signal in accordance with the synchronization signal, and controls the output of the RF signal.

The control of the output level of the input signal is the same as the control method of the transmission signal. In order to protect the reception link in the transmission link, a second switch 134 is separately installed on the reception path. It is preferable that the second switch 134 is positioned between the circulator 136 and the second mixer 126 which selectively output the transmission signal and the reception signal.

By applying the second switch 134, the transmission / reception path of the signal is controlled. When the transmission signal is input, the second switch 134 is turned off, so that the transmission path of the transmission path by the transmission signal input to the reception path when the signal is transmitted Prevents component damage and improves signal separation between transmission and reception signals. Then, upon reception of the received signal, the second switch is turned on to adjust only the received signal to pass through the second mixer 126.

In addition, an input signal that has passed through the fourth coupler 140 connected to the antenna 142 is input to the fourth mixer 148 to down-convert the frequency. Since the input signal passing through the fourth mixer 148 may have difficulty in detecting the RF signal because the output level is low, the second RF signal detector 152 is provided even when a low level signal is input by additionally installing the fifth amplifier 144. Is configured to operate normally.

The detection signal generated by the second RF signal detector 152 is defined as a second detection signal.

In this way, both the first detection signal branching from the output signal and sensing the output, and the second detection signal branching from the input signal and sensing the output are input to the controller 106. The control unit controls the operation of the first variable attenuator 112 or the second variable attenuator 114 according to the signal levels of the received two detection signals, and accordingly the signal levels of the transmission and reception signals are changed.

The control unit 106 receives the transmission signal, the reception signal, and the synchronization signal of the TDD communication network, controls the flow of the RF signal according to the timing of the transmission path and the reception path, and receives the signals input from the RF signal sensor of the transmission signal and the reception signal. It detects and compares to control the output level of the signal of the transmitting link and receiving link.

In addition, when waiting for transmission / reception of the modem 102, the signals of the third coupler 138 and the fourth coupler 140 are sensed to enable RF signal detection at the transmission output terminal and the reception input terminal.

The control unit 106 includes a detection signal A / D table for detecting an RF signal, and the synchronization signal input from the modem 102 to the synchronization detector 106b includes a control output signal that controls the delay of the signal path. .

The two comparators 106c and 106d are connected to the first RF signal detector 118 and the second RF signal detector 152, respectively, and compare the magnitudes of the detection signals input from the respective RF signal detectors and transmit them to the processor 106a. do.

7 and 8, the output level of the signal passing through each component and the state of the frequency are relatively displayed.

The frequencies of the signals output from the modem 102, the first RF signal detector 118, and the second RF signal detector 152 are the same. In addition, the output and the frequency are changed along the transmission path, and the output signal and the output signal transmitted through the antenna 142 are all in an up-converted state (see FIG. 7).

Conversely, the received signal input through the antenna 142 is lower than the input signal from the modem 102, etc., the input level is low, and the frequency is up-converted. (See FIG. 8) Therefore, the transmission signal from the modem 102 The frequency of the received signal is down-converted and transmitted to be the same as the output state.

Meanwhile, FIG. 9 is a block diagram showing the structure of a sensing system according to another embodiment.

9, between the local oscillator 128 and two mixers, that is, the first mixer 124 and the second mixer 126, the fifth coupler 154 and the sixth coupler 156, respectively Install it. The signal branched from the fifth coupler 154 and the sixth coupler 156 passes through the sixth amplifier 158 and the seventh amplifier 160, respectively, and the output of the signal is amplified, respectively, and the third mixer 146 and It is input to the fourth mixer 148 and used as a reference value for frequency up or down conversion.

Meanwhile, FIG. 10 is a block diagram showing the structure of a sensing system according to another embodiment.

As illustrated in FIG. 10, by adding a low-noise amplifier 162 between the fourth mixer 148 and the second divider 150, it can be configured to enable detection even in the case of a signal having a significantly low output level.

In the present invention, a low-noise amplifier (LNA AGC AMP) was added in the process of detecting the input level to detect the received signal to implement this effect.

The preferred embodiments of the present invention have been described above with reference to the accompanying drawings, but the above-described technical configuration of the present invention is not limited to those skilled in the art to which the present invention pertains without changing the technical spirit or essential features of the present invention. It will be understood that can be carried out. Therefore, the above-described embodiments are to be understood as illustrative and not restrictive in all respects, and the scope of the present invention is indicated by the following claims rather than the detailed description, and the meaning and scope of the claims and It should be construed that any altered or modified form derived from the equivalent concept is included in the scope of the present invention.

100: detection system 102: modem
104: first switch 106: control
108: first coupler 110: second coupler
112: first variable attenuator 114: second variable attenuator
116: first distributor 118: first RF signal detector
120: first amplifier 122: second amplifier
124: first mixer 126: second mixer
128: local oscillator 130: third amplifier
132: 4th amplifier 134: 2nd switch
136: circulator 138: third coupler
140: fourth coupler 142: antenna
144: 5th amplifier 146: 3rd mixer
148: 4th mixer 150: 2nd divider
152: 2RF signal detector 154: 5th coupler
156: 6th coupler 158: 6th amplifier
160: 7th amplifier 162: low-noise amplifier

Claims (3)

The transmission signal and the reception signal of the RF signal in the millimeter band used in the 5th generation (5G) mobile communication network operated by the TDD method are separated, and the output level and frequency of the transmission signal and the reception signal are measured to determine the state of the communication equipment. As a detection system to monitor,
A first switch 104 for selectively determining a transmission path of a synchronization signal and an RF signal output from the modem 102;
A first coupler (108) for branching a portion of the synchronization signal and the RF signal transmitted from the first switch (104) and transmitting them to the control unit (106);
A first RF signal detector (118) that generates a first detection signal by sensing the output level and frequency of the RF signal branched from the first coupler (108) and transmits the first detection signal to the control unit (118) )Wow;
A first variable attenuator (112) for controlling the output level of the RF signal passing through the first coupler (108);
A first mixer 124 for up-converting the frequency of the RF signal passing through the first variable attenuator 112 according to the frequency of the signal input from the local oscillator 128;
A circulator 136 for determining a transmission path of the RF signal whose frequency is increased while passing through the first mixer 124;
An antenna 142 transmitting the RF signal transmitted from the circulator 136;
A fourth coupler 140 for branching a part of the input signal received through the antenna 142;
A second mixer 126 for down-converting the frequency of the input signal input through the fourth coupler 140 and the circulator 136 according to the frequency of the signal input from the local oscillator 128;
A second variable attenuator 114 for controlling the output level of the input signal that has passed through the second mixer 126;
A third coupler 138 for branching a portion of the input signal that has passed through the fourth coupler 140;
A third mixer 146 for converting the frequency of the input signal passing through the third coupler 138 to the same frequency as the RF signal output from the modem 102;
A fourth mixer 148 for converting the frequency of the input signal branched from the fourth coupler 140 to the same frequency as the RF signal output from the modem 102;
Detecting the output level and frequency of the input signals input to the third mixer 146 and the fourth mixer 148 to generate a second detection signal, and transmitting the second detection signal to the control unit 106 Includes a second RF signal detector 152;
The control unit 106 checks the output level of the transmission signal from the first detection signal, compares the output level with a stored reference value, and controls the first variable attenuator 112 to control the output level of the RF signal. Change,
The control unit 106 checks the output level of the input signal from the second detection signal, compares the output level with a stored reference value, and controls the second variable attenuator 114 to control the output level of the input signal. A sensing system for double detection of input / output signals in the 5G millimeter wave band, characterized by varying. delete delete

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