KR200243476Y1 - Apparatus for detecting and alarming a spurious at rf system - Google Patents

Abstract

The present invention relates to a spurious detection and warning device for RF (R / F) system, and monitors the RF output value and RF power level of various frequencies at a predetermined part of the transmitting / receiving end of the RF system to warn when an abnormal frequency occurs. Its purpose is to provide a SPURIOUS detection and warning device in RF systems.

The present invention provides relay processing means for performing various signal processing for relaying an RF signal, signal processing means for measuring the level of transmission and reception power and performing various signal processing, and transmitting the RF signal via the signal processing means. In the RF system comprising a transmitting and receiving means for receiving or receiving, signal abnormality detection for detecting the RF signal input and output by detecting a spurious power level of a frequency separated from the output / input spaced apart from the transmission and reception means of the RF system Means; By comparing the RF signal applied from the signal abnormality detecting means with a preset frequency level, it is determined whether or not the spurious of the RF signal exceeds the set value, and alarms by controlling the alarm means when the spurious of the RF signal exceeds the set value. Control means for generating a; Receiving a drive control signal from the control means characterized in that consisting of a warning means for warning that the spurious of the RF signal transmitted or received through the LED and the speaker is greater than the set value.

According to the present invention, ASD, ALC, and AGC, which are the basic functions of the detection device provided in the existing RF system, are implemented to monitor the RF output sense, to monitor the RF power level of a desired frequency, and to perform spurious power at a separate frequency. By monitoring the level and alarming, the signal relay quality of various repeaters can be greatly improved.

Description

Spurious detection and warning device in RF system {APPARATUS FOR DETECTING AND ALARMING A SPURIOUS AT RF SYSTEM}

The present invention relates to a spurious detection and warning device in RF (R / F) system, and more specifically to monitor and warn in-band and external spurious emission standards in RF systems of various relay systems and base stations. The present invention relates to a spurious detection and warning device in an RF system.

As is well known, in the case of a relay system, 29dBc (45dBc of total output in FA) and 44dBc of Fc ± 1.98MKHz when the spurious emission standard radiated within a certain frequency specification is Fc ± 750KHZ. 60 dBc).

In addition, the spurious emission standard radiated out of the band is 29dBc (45dBc based on total output in FA) at Fc ± 795KHZ, and 44dBc (60dBc based on total output within FA) at Fc ± 1.98MKHz. In the case of operators, the out-of-band spurious emission specification is defined as 39 dBc (55 dBc of total output in FA) when the Fc ± 1.98 MKHz.

In the case of spurious radiated out of band, spurious increases due to aging of RF components and RF stress. In spurious in band, the interference level of the frequency band used by the service provider is increased, and as a result, the noise level is increased. In addition to reducing the number of subscribers in the system, the subscribers also have the effect of reducing the usage time of the mobile phone battery.

In addition, in case of out-of-band spurious, it can be applied as a failure of service of other operator assigned by radio management, so out-of-band spurious emission of base station and relay system should be monitored all the time. You should be able to.

Therefore, the necessity of a system and a relay system in which the in-band and out-of-band spurious radiation monitoring function is added to the base station and the relay system is urgently needed, and it is important to add a function to monitor the existing RF system.

However, in the conventional RF system, a noise detection device that performs only the ASD (Auto Shut Down) function and the ALC (Auto Level Control) and AGC (Auto Gain Control) functions is used in combination with the output termination of the RF system. The detection device has a problem that the detection of the RF power level for various channels and the detection and warning of abnormality of the separation frequency are not made at all.

In other words, the existing noise detection device is coupled to the output end of the relay device and detects only the output value of the output RF signal. Therefore, the detection device has no meaning in the current relay device in which various band frequencies are used. Of course, there is a serious problem that the forced signal drop and the gain value are controlled when a different value is generated in comparison with the set RF level even in a non-normal state.

The present invention has been made in view of the above-described situation of the prior art, and in an RF (R / F) system that monitors an RF output value and RF power level of various frequencies at a predetermined part of a transmitting / receiving end of an RF system, Its purpose is to provide a spurious detection and warning device.

1 is a block diagram schematically showing the configuration of a spurious detection and warning device in an RF system according to an embodiment of the present invention;

2 is a circuit diagram illustrating a circuit configuration of a spurious detection and warning device in an RF system according to an embodiment of the present invention;

3 is a circuit diagram illustrating a spurious detection and warning device in an RF system according to another embodiment of the present invention.

* Description of the symbols for the main parts of the drawings *

100: relay processing circuit, 200: signal processing circuit,

300: transmission and reception circuit, 400: signal error detection circuit,

500: signal processing circuit, 600: signal error detection circuit,

700: control unit, 702: LED.

In order to achieve the above object, according to a preferred embodiment of the present invention, relay processing means for performing various signal processing for relaying an RF signal, and signal processing means for measuring the level of transmission and reception power and performing various signal processing. And a transmitting / receiving means for transmitting or receiving an RF signal through the signal processing means, the spurious power level of a frequency separated from an output / input at a predetermined distance from the transmitting / receiving means of the RF system. Signal abnormality detecting means for detecting an input / output RF signal; By comparing the RF signal applied from the signal abnormality detecting means with a preset frequency level, a comparison is made to determine whether the spurious of the RF signal exceeds the set value, and an alarm by controlling the alarm means when the spurious of the RF signal exceeds the set value. Control means for generating a; Spurious (SPURIOUS) in the RF (R / F) system, characterized in that the drive means receives a drive control signal from the control means for warning that the spurious of the RF signal transmitted or received through the LED and the speaker is greater than the set value. Detection and warning devices are provided.

Preferably, the signal anomaly detecting means converts the frequency of the variable phase synchronization loop into an intermediate frequency, filters the filter, measures the power level of the frequency band in use, and changes the oscillation frequency through the variable phase synchronization loop. An in-band spurious level measuring an unused frequency band level; RF (R /) characterized by measuring the frequency band power in use in the in-band and changing the oscillation frequency of the variable phase locked loop to measure the out-band spurious level to measure the frequency of the defined specification. F) A spurious detection and warning device in the system is provided.

More preferably, it is possible to detect the spurious of the corresponding channel using at least one fixed phase locked loop having a specific fixed channel instead of the variable phase locked loop configured in the signal abnormality detecting means. F) A spurious detection and warning device in the system is provided.

Hereinafter, the present invention will be described in detail with reference to the drawings.

The spurious detection and warning device in the RF system according to an embodiment of the present invention has a function to detect an abnormality of the equipment itself, and ASD (Auto Shut Down) to stop the RF output when an abnormal output occurs. ) And ALC (Auto Level Control) and AGC (Auto Gain Control) functions as the basis, and the spurious level in and out of the band can be monitored at all times and alerted when an abnormality occurs.

FIG. 1 is a block diagram schematically illustrating a configuration of a spurious detection and warning device in an RF system according to an embodiment of the present invention.

Referring to this, a spurious detection and warning device in an RF system according to the present invention is provided in the relay device, and the relay device first includes the relay processing circuit 100. .

One end of the signal processing circuit 200 for processing the processed RF signal and measuring the power level is coupled to the other end of the relay processing circuit 100, and the other end of the signal processing circuit 200 is used to mediate the RF signal to the antenna. Transmit and receive circuitry 300 for transmitting or receiving is coupled.

In this case, a signal field area is formed by a RF signal transmitted between a signal processing circuit 200 and a transmitting / receiving circuit 300, and according to the present invention within a measurement range of the signal field area. Signal abnormality detection circuit 400 is provided.

On the other hand, one end of the signal processing circuit 500 for processing the received RF signal and measuring the voltage level of the RF signal is coupled to the other end of the transmission and reception circuit 300, and the other end of the signal processing circuit 500. It is coupled to the relay processing circuit 100 in the same manner as the transmitter.

Similarly, a signal abnormality detection circuit 600 is provided in a signal field area formed between the signal processor 500 and the relay processing circuit 100 to detect and warn of a signal abnormality.

In this case, the signal abnormality detection circuits 400 and 600 are coupled to the controller 700 to input an input value for the abnormality of the RF signal detected therein to the controller 700. Accordingly, the control unit 700 compares the SF output and input value and the RF power level applied with the preset value to drive the LED 702 or the like to check whether the RF signal is abnormal.

2 is a circuit diagram illustrating a circuit configuration of a spurious detection and warning device in an RF system according to an embodiment of the present invention.

Referring to this, one end of a low noise amplifier (LNA) 202 for amplifying the RF signal applied from the relay processing circuit 100 to a predetermined level is connected inside the signal processing circuit 200. The other end of the LNA 202 is connected to one end of the mixer 204 which generates a first intermediate frequency by mixing the signal amplified by the LNA 202 with the signal amplified by the logarithmic amplifier (Lo AMP: 216). .

The other end of the mixer 204 is also connected to one end of a band pass filter 206 for band pass filtering the outgoing RF signal, and the other end of the band pass filter 206 for amplifying the power level of the filtered signal. One end of the intermediate frequency amplifier (IF AMP) 208 is connected, and the other end of the intermediate frequency amplifier (IF AMP) 208 is connected to one end of an attenuator 210 for attenuating the voltage level of the amplified signal.

On the other hand, the other end of the attenuator 210, one end of the intermediate frequency amplifier (IF AMP) 212 is connected, and the other end of the intermediate frequency amplifier (IF AMP) 212 is a signal applied from the logarithmic amplifier (Lo AMP: 220) A mixer 214 is connected which generates a second intermediate frequency by mixing with.

At this time, a local variable oscillator (FWD local oscillator) 218 which performs frequency oscillation is connected between the log amplifier 216 and the log amplifier 220.

One end of the bandpass filter 222 for bandpass filtering the outgoing RF signal is connected to the other end of the mixer 214, and one end of the power amplifier 224 is connected to the other end of the bandpass filter 222. The other end of the power amplifier 224 is connected to the duplexer (Duplexer 300) of the configuration of the transmission and reception circuit 300, the duplexer (300) is coupled to the predetermined antenna to transmit and receive the RF signal .

Meanwhile, the signal processing circuit 500 for processing the received RF signal also has the same configuration as the signal processing circuit 200.

In this case, a signal field region (indicated by a dotted line) of a predetermined range is formed in the connection line between the power amplifier 224 and the duplexer 300, and the signal abnormality detection circuits 400 and 600 are formed in the signal field region. It is configured within the effective range to detect the abnormality of the corresponding RF signal when transmitting and receiving the RF signal.

More specifically, the signal abnormality detection circuits 400 and 600 detect the RF output value of the final output stage of the RF system, and use the RF signal coupled by the combiner as an IF frequency (intermediate frequency). To monitor the RF power level of the frequency to be monitored. The spurious power level is also monitored by monitoring the spurious power level of the frequency relative to the output.

First, the signal abnormality detection circuits 400 and 600 are largely composed of an isolation port and a coupling port. For example, the insulation port may be used to detect an abnormality of an RF signal transmitted or received. The coupling port is for detecting the reflected wave of the RF signal.

The isolation port is connected to one end of a logarithmic amplifier 401 for amplifying an applied signal through a signal field region of the final output terminal or input signal of the RF signal, and the other end of the log amplifier 401. The log amplifier 401 is connected to one end of the mixer 402 for mixing with a signal applied from a phase locked loop (PLL) 404 that generates a frequency of a predetermined variable band.

The other end of the mixer 402 is connected with one end of a band pass filter 406 for band pass filtering the transmission power of the transmitter, and the logarithmic amplifier 408 is connected to the other end of the band pass filter 406. One end of is connected.

On the other hand, the other end of the logarithmic amplifier 408 is connected to one end of the operational amplifier (410) for operation amplifying the signal level amplified through the logarithmic amplifier (408), the other end of the operational amplifier 410 One end of an A / D converter 412 for converting an analog signal into a digital signal is connected.

In addition, the coupling port is connected to one end of a logarithmic amplifier 414 for receiving and amplifying a reflected wave among signals applied through a signal field region of the final output terminal or input terminal of the RF signal. The other end of the amplifier 414 is connected to one end of an operational amplifier 416 for operational amplifying the signal level amplified by the logarithmic amplifier 414, and the other end of the operational amplifier 416 is connected to a digital signal. One end of the A / D converter 418 for converting into a signal is connected.

At this time, the signal transmitted to the other end of the log amplifier (414, 418) is applied to the control unit 700 to detect the presence or absence of an RF signal for transmission or a received RF signal through a signal comparison with a predetermined frequency band do. The controller 700 generates a warning signal through the LED 702 or the speaker 704 when it is determined that the RF signal or the received RF signal is an abnormal signal.

More specifically, the signal abnormality detection circuits 400 and 600 monitor the level of spurious power by monitoring the spurious power level of the frequency separated from its output.

In other words, in order to monitor the in-band spurious (In-Band Spurious) level, the frequency band (FA) of the variable phase synchronization loops (404, 606) can be detected by detecting an unused frequency band (FA) among the allocated frequencies of the operator. After converting to intermediate frequency (IF) and filtering with filter (406, 608), the power level of the frequency band (FA) in use is measured, and the oscillation frequency is changed through the variable phase synchronization loop (404, 606). In-band spurious levels are measured by measuring unused frequency band (FA) levels.

In addition, to monitor out-band spurious (Out-Band Spurious) levels, the frequency band (FA) power in use in the In-Band is measured and oscillation of the variable phase-locked loops 404 and 606 are performed. By changing the frequency, measure and monitor the frequency (29dBc (45dBc of total output in FA) at Fc ± 795KHZ) and 44dBc (60dBc of total output in FA) at Fc ± 1.98MKHz.

In addition, by measuring out-band spurious (out-band spurious), out-band spurious (out-band spurious) even when the operator is using the frequency band (FA) in full-band (FA) By monitoring the level, you can predict In-Band Spurious at the same time.

3 is a circuit diagram illustrating a spurious detection and warning device in an RF system according to another embodiment of the present invention.

Referring to this, instead of the variable phase-locked loops 404 and 606 configured in the signal abnormality detection circuits 400 and 600, a fixed phase locked loop (for example, 1 channel-PLL to N channel-PLL) is formed. It is also possible to configure other components in the same manner as in FIG.

This is because the channel band to be detected is not very wide, and the fixed phase locked loop (1 channel-PLL) as shown in FIG. 3 without using the variable phase locked loops 404 and 606 in a predetermined state of the target channel is few. Even using -N channel-PLL, the spurious of the RF signal to be detected can be sufficiently detected.

On the other hand, the spurious detection and warning device in the RF system according to an embodiment of the present invention is not limited only to the above embodiment, but various changes are made within the scope not departing from the technical gist. It is possible.

As described above, the spurious detection and warning device in the RF system according to the present invention implements ASD, ALC, and AGC, which are basic functions of the detection device included in the existing RF system, to monitor the RF output feeling. In addition, by monitoring the RF power level of the desired frequency, and the spurious power level of the separation frequency can be monitored and alarmed, the signal relay quality of various repeaters can be greatly improved.

Claims (2)

Relay processing means for performing various signal processing for relaying the RF signal, signal processing means for measuring the level of transmission and reception power, and performing various signal processing, and transmitting or receiving the RF signal via the signal processing means. In the RF system consisting of a transmission and reception means for, Signal abnormality detecting means for detecting an RF signal input and output by detecting a spurious power level of a frequency separated from an output / input at a predetermined distance from the transmitting and receiving means of the RF system; By comparing the RF signal applied from the signal abnormality detecting means with a preset frequency level, it is determined whether or not the spurious of the RF signal exceeds the set value, and alarms by controlling the alarm means when the spurious of the RF signal exceeds the set value. Control means for generating a; Spurious (SPURIOUS) in the RF (R / F) system, characterized in that the drive means receives a drive control signal from the control means for warning that the spurious of the RF signal transmitted or received through the LED and the speaker is greater than the set value. Detection and warning device. According to claim 1, wherein the signal abnormality detecting means changes the frequency of the variable phase synchronization loop is converted to an intermediate frequency, and then filtered through a filter to measure the power level of the frequency band in use and the oscillation frequency through the variable phase synchronization loop Measuring an in-band spurious level for changing an unused frequency band level; RF (R /) characterized by measuring the frequency band power in use in the in-band and changing the oscillation frequency of the variable phase locked loop to measure the out-band spurious level to measure the frequency of the defined specification. F) SPURIOUS DETECTION AND WARNING DEVICE IN THE SYSTEM.