KR20000032374A - Repeater system for compensating stability of frequency using subcarrier - Google Patents

Abstract

PURPOSE: A repeater system for compensating stability of frequency using sub carrier is provided to improve a transmission performance and a transmission quality by compensating a stability of frequency using a sub carrier. CONSTITUTION: A receiving reference oscillator(32a) outputs a reference frequency signal having a reference frequency and a frequency changed width in initial stage. A receiving intermediate converting unit(32e) mixes a microwave signal for a mobile telecommunication and a microwave signal for a sub carrier with a negative component signal of a local oscillating frequency outputted from a second local oscillator(32c). A power divider(32f) divides a signal component with a low frequency band outputted from the receiving intermediate converting unit(32e) into each different direction. A receiving band pass circuit unit(32g) extracts a signal component for a mobile telecommunication with a low frequency band among intermediate frequency signal components. A first sub carrier band pass circuit unit(32h) extracts a first sub carrier signal among intermediate frequency signals outputted from the power divider(32f). A second sub carrier band pass circuit unit(32i) extracts a second sub carrier signal among intermediate frequency signals outputted from the power divider(32f).

Description

Repeater system for frequency stability compensation using subcarriers

The present invention relates to an apparatus for compensating and transmitting frequency stability of a mobile communication frequency band signal relayed using a subcarrier in a mobile communication repeater system using a reference oscillator.

More specifically, the transmitter of the repeater system additionally transmits a plurality of subcarriers having the same stability due to the stability of the reference oscillation frequency, and the receiver refers to the frequency corresponding to the difference between these subcarriers. It is a system that compensates and transmits the frequency stability of the mobile communication frequency band signal to be relayed by making it equal to the stability of the reference oscillation frequency in the transmitter by using it as the oscillation frequency.

In general, the mobile communication system uses a repeater system to expand the service area or to eliminate the shadow area, and to improve the transmission efficiency of the mobile communication frequency band signal to be relayed and to prevent communication quality degradation due to interference, It is used as a signaling medium.

In the mobile communication repeater system using the reference oscillator, the higher the repeater frequency between the transmitter and the receiver, the greater the frequency stability of the signal of the mobile communication frequency band to be transmitted, resulting in a decrease in transmission efficiency.

In particular, when relaying using a very high frequency compared to the mobile communication frequency band signal, the frequency stability is improved by using a high quality reference oscillator or using a device receiving an expensive Global Positioning System (GPS).

1 is a block diagram of a repeater system for transmitting and receiving a conventional microwave signal, Figure 2a is a block diagram of a transmitter for transmitting an ultrahigh frequency signal in a conventional repeater system, Figure 2b is a conventional repeater A block diagram of a receiver for receiving an ultra high frequency signal in a system.

As shown in FIG. 1, a repeater system for transmitting and receiving an ultra high frequency band signal includes a transmitter 11 for receiving a mobile communication frequency band signal from a base station, converting the signal into an ultra high frequency band signal after amplification, and transmitting the signal; Receiving device 12 for receiving an ultra-high frequency band signal output from the transmitting device 11, converts it back into a mobile communication frequency band signal, amplifies it, and transmits it to a mobile station or another base station.

In addition, the operating principle of the transmitter 11 will be described with reference to FIG. 2A.

Reference Oscillation Frequency from Reference Oscillator 11a f _r When oscillation is generally, the exact frequency is not output and has a small range. To express the degree of shaking of this frequency, the ratio of the frequency swing width to the signal frequency is defined as frequency stability. Therefore, the reference oscillation frequency output from the reference oscillator 11a f _r Stability of Δα If displayed as, the reference oscillation frequency actually output is (1 + Δα) f _r Becomes

A reference oscillation frequency output from the reference oscillator 11a (1 + Δα) f _r Is input to the first local oscillator 11b and the second local oscillator 11c for outputting a local oscillation frequency for converting a mobile communication frequency band signal into an intermediate frequency band and an ultra-high frequency band, respectively. Reference oscillation frequency (1 + Δα) f _r Stability Δα Frequency of stability equal to (1 + Δα) f _{L One} , (1 + Δα) f _{L 2} Will print

In the transmitter 11, the bandwidth is Δf _B And the center frequency f _s Local oscillation frequency outputted from the first local oscillator 11b after receiving (1 + Δα) f _{L One} And the intermediate frequency converter 11d to mix the bandwidth Δf _B Same but with center frequency f _s- (1 + Δα) f _{L One} And converts the intermediate frequency band signal output from the intermediate frequency converter 11d to only the portion corresponding to the signal component in the band pass circuit 11e and removes the remaining portions.

The local oscillation frequency outputted from the second local oscillator 11c by the intermediate frequency band signal extracted by the band pass circuit section 11e. (1 + Δα) f _{L 2} And the mixing by the ultra-high frequency conversion section 11d Δf _B Same but with center frequency f _s + (1 + Δα) (f _{L 2} -f _{L One} ) Is converted into a very high frequency band signal and transmitted from the transmitter 11.

Therefore, the frequency stability of the ultra-high frequency band signal transmitted from the transmitter 11 is (f _{L 2} -f _{L One} ) Δα And usually dozens here GHz Local oscillation frequency of the second local oscillator close to the ultra high frequency f _{L 2} Is usually GHz Local oscillation frequency of the first local oscillator close to the mobile communication frequency f _{L One} Since it is very large compared to, when relaying using ultra-high frequency, the frequency stability is greatly increased, which greatly affects the transmission quality of the signal.

In addition, the operation principle of the receiver 12 will be described with reference to FIG. 2B.

A reference oscillation frequency output from the reference oscillator 12a of the receiver 12 (1 + Δβ) f _r Is input to the second local oscillator 12c and the first local oscillator 12b for outputting the local oscillation frequency for converting the received ultra-high frequency signals into the intermediate frequency band and the mobile communication frequency band, respectively. Input reference oscillation frequency (1 + Δβ) f _r Stability Δβ Frequency of stability equal to (1 + Δβ) f _{L 2} , (1 + Δβ) f _{L One} Will print

Stability of reference oscillation frequency of the receiver 12 Δβ In general, the stability of the reference oscillation frequency of the transmitter 11 Δα Since the environment of the device is different from each other and the synchronization of each signal is different, the size and the sign may be different from each other.

The bandwidth transmitted from the transmitter 11 is Δf _B Same but with center frequency f _s + (1 + Δα) (f _{L 2} -f _{L One} ) Local oscillation frequency output from the second local oscillator 12c after receiving (1 + Δβ) f _{L 2} And the intermediate frequency converter 12d to mix the bandwidth Δf _B Same but with center frequency f _s- (1 + Δα) f _{L One} + (Δα-Δβ) f _{L 2} And converts the intermediate frequency band signal output from the intermediate frequency conversion unit 12d to only the portion corresponding to the signal component in the band pass circuit unit 12e and removes the remaining portions.

The local oscillation frequency outputted from the first local oscillator 12b by the intermediate frequency band signal extracted by the band pass circuit section 12e (1 + Δβ) f _{L One} ) And the mobile communication frequency converter 12d Δf _B Same but with center frequency f _s + (Δα-Δβ) (f _{L 2} -f _{L One} ) The signal is converted back into a mobile communication frequency band signal and transmitted to a mobile station or another base station.

Therefore, the frequency stability of the mobile communication frequency band signal relayed and transmitted from the receiver 12 is (Δα-Δβ) (f _{L 2} -f _{L One} ) Become, Δα Wow Δβ Since the size and the sign can be changed depending on the state of the transmitter and receiver, the worst case can be increased in proportion to the sum of the stability of the reference oscillation frequency in each transmitter and receiver, which greatly affects the transmission quality of the signal.

In order to reduce the frequency stability of a mobile communication frequency band signal due to the stability of the reference oscillation frequency, it is generally necessary to use a reference oscillator having a very high frequency stability or a method using a signal received from the GPS instead of the reference oscillator. There was a problem.

In other words, in the repeater using the ultra high frequency, the stability of the reference frequency is greatly affected by the stability of the reference oscillation frequency, and there is a limit in improving the frequency stability of the reference oscillator. There was a very difficult problem to relay without affecting.

Accordingly, an object of the present invention is to further transmit a plurality of subcarriers having the same stability by being affected by the stability of the reference oscillation frequency in the transmitter, and to reference the frequency corresponding to the difference between these subcarriers in the receiver By using the frequency as the reference oscillation frequency stability of the receiving device to the same as the reference oscillation frequency stability of the transmitting device to offset each other to compensate for the adverse effect that the stability of the reference oscillation frequency on the frequency stability of the signal of the mobile communication frequency band to be relayed The purpose is to construct a repeater system.

1 is a block diagram of a repeater system for transmitting and receiving using a conventional high frequency wave,

2A is a block diagram of a transmitter for transmitting an ultra high frequency band signal in a repeater system using a conventional ultra high frequency wave;

2b is a block diagram of a receiving apparatus for receiving an ultra high frequency band signal in a repeater system using a conventional ultra high frequency;

3 is a block diagram of a repeater system for transmitting and receiving an ultra high frequency band relay signal including a subcarrier frequency component of the present invention;

FIG. 4A is a block diagram of an embodiment of a transmitter for transmitting an ultra high frequency band relay signal including two subcarrier frequency components in a repeater system of the present invention; FIG.

Figure 4b is a block diagram of an embodiment of a receiving apparatus for receiving an ultra-high frequency relay signal including two subcarrier frequency components in a repeater system of the present invention.

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

31: Transmission device for compensating for frequency stability 31a: Reference oscillator for transmission

31b: first local oscillator for transmission 31c: second local oscillator for transmission

31d: first subcarrier generator 31e: second subcarrier generator

31f: Intermediate frequency converter for transmission 31g: Band pass circuit for transmission

31h: power synthesizer 31i: ultra-high frequency converter for transmission

32: Receiver for frequency stability compensation 32a: Reference oscillator for reception

32b: switching circuit part 32c: second local oscillator for receiving

32d: First local oscillator for reception 32e: Intermediate frequency converter for reception

32f: Power distribution unit 32g: Receive band pass circuit

32h: first subcarrier band pass circuit section

32i: second subcarrier band pass circuit section

32j: reference oscillation frequency converter 32k: mobile communication frequency converter

32m: Frequency multiplier

The repeater system for frequency stability compensation using subcarriers according to the present invention for achieving the stated object is amplified, mixed with the local oscillation frequency for intermediate frequency conversion signal received from the base station and converted to the intermediate frequency band A frequency stability compensation transmitter for synthesizing with a plurality of subcarriers and mixing with a local oscillation frequency for ultra high frequency conversion to convert the ultra high frequency signal into an ultra high frequency band signal; The ultra-high frequency signal transmitted from the frequency stability compensation transmitter is mixed with the local oscillation frequency for intermediate frequency conversion and converted into the intermediate frequency band, and subcarrier frequencies are extracted and converted to the reference oscillation frequency, respectively. And a frequency stability compensation receiver which outputs a signal whose frequency stability is compensated by mixing with a local oscillation frequency for mobile communication frequency conversion and converting the signal into a mobile communication frequency band signal.

Hereinafter, a configuration and an embodiment of a repeater system for frequency stability compensation using a subcarrier of the present invention will be described with reference to the accompanying drawings.

Figure 3 is a block diagram of a repeater system for transmitting and receiving an ultra-high frequency repeater signal including a sub-carrier frequency component of the present invention, Figure 4a is an ultra-high frequency band relay including two sub-carrier frequency components in the repeater system of the present invention 4 is a block diagram of an embodiment of a transmitter for transmitting a signal, and FIG. 4B is a block diagram of an embodiment of a receiver for receiving an ultra high frequency band relay signal including two subcarrier frequency components in a repeater system of the present invention.

As shown in FIG. 3, a repeater system for transmitting and receiving an ultra high frequency band relay signal including a subcarrier frequency component may mix a mobile communication frequency band signal received from a base station with a local oscillation frequency of a similar frequency band to an intermediate frequency band. A frequency stability compensation transmitter 31 and a frequency stability compensation transmitter 31 for converting and combining a plurality of subcarrier frequencies and mixing with a local oscillation frequency of an ultra high frequency band to transmit an ultra high frequency band relay signal including subband frequency components. 31) Mixing the ultra-high frequency band relay signal including sub-carrier frequency components outputted from 31) with the local oscillation frequency of the ultra-high frequency band to convert to the intermediate frequency band, extracting the frequency corresponding to the frequency difference between the sub-carrier frequencies, and using it as the reference oscillation frequency. Mobile operators with frequency stability compensation And a frequency stability compensation receiver 32 for transmitting the frequency band signal to a mobile station or another base station.

In addition, as shown in Figure 4a, the frequency stability compensation transmitter 31 has a frequency stability Δα Reference oscillation frequency (1 + Δα) f _r A reference oscillator 31a for outputting the reference oscillation frequency output from the reference oscillator 31a for transmission (1 + Δα) f _r A first local oscillator 31b and a second local oscillator 31c for transmitting and outputting a local oscillation frequency used to convert a mobile communication frequency band signal into an intermediate frequency band and an ultrahigh frequency band, respectively, A first subcarrier generator 31d and a second subcarrier generator 31e for outputting subcarriers in an intermediate frequency band having a frequency difference from each other by n times the reference oscillation frequency output from the credit reference oscillator 31a, and a bandwidth received from a base station ΔB And the center frequency f _s A transmission intermediate frequency converting unit 31f for amplifying a mobile communication frequency band signal and mixing with the local oscillation frequency output from the first local oscillator 31b for conversion into an intermediate frequency band, and the transmission intermediate A transmission band pass circuit section 31g for extracting only signal components from the intermediate frequency band signal output from the frequency converter 31f, the first subcarrier generator 31d, the second subcarrier generator 31e, and the transmission band pass. A power synthesis section 31f for synthesizing the respective frequencies and signals output from the circuit section 31g, an intermediate frequency band signal including subcarrier frequency components from the power synthesis section 31f, and the second local oscillator for transmission; And a transmission ultra-high frequency converter 31i for mixing the local oscillation frequency output from 31c and transmitting an ultra-high frequency band relay signal including sub-carrier frequency components.

Instead of n times the reference oscillation frequency output from the transmission reference oscillator 31a, a frequency having a frequency difference of 1 / n times may be used.

In addition, as shown in Figure 4b, the frequency stability compensation receiver 32 has a frequency stability Δβ Reference oscillation frequency (1 + Δβ) f _r A receiving reference oscillator 32a for outputting a first, a switching circuit unit 32b for initially selecting a reference oscillation frequency output from the receiving reference oscillator, and then selecting a reference oscillation frequency generated from the received signal; A second local oscillator 32c for receiving and receiving a local oscillation frequency for use in converting an ultrahigh frequency band signal into an intermediate frequency band and a mobile communication frequency band by receiving a reference oscillation frequency selected from the switching circuit section 32b, respectively; Local part outputted from the second local oscillator 32c for reception after amplifying an ultrahigh frequency band signal including a first local oscillator 32d and a subcarrier frequency component transmitted from the frequency stability compensation transmitter 31 Receiving intermediate frequency converting unit 32e for mixing with the oscillation frequency to convert to the intermediate frequency band, and receiving intermediate frequency converting unit 32e Receiving band for extracting only the signal component from the intermediate frequency band signal including the power distribution unit 32f for distributing the intermediate frequency signals output from the respective directions in a different direction and the sub-carrier frequency output from the power distribution unit 32f The first subcarrier band pass circuit section 32h for extracting the first subcarrier frequency from the pass circuit section 32g, the intermediate frequency band signal output from the power distribution section 32f, and the intermediate section output from the power distribution section 32f. Combining the second subcarrier bandpass circuit portion 32i for extracting the second subcarrier frequency from the frequency band signal, and the two frequencies output from the first subcarrier bandpass circuit portion 32h and the second subcarrier bandpass circuit portion 32i. The frequency of the reference oscillation frequency converter 32j for outputting the reference oscillation frequency and the signal output from the reference oscillation frequency converter 32j, and then A multiplier converter 32m which simultaneously outputs one local oscillator 32d and the switching circuit section 32b, an intermediate frequency band signal output from the reception band pass circuit section 32g, and a first local oscillator 32d for reception. And a mobile communication frequency converter 32k for mixing the local oscillation frequency output from the mobile station to convert the local oscillation frequency into a mobile communication frequency band signal.

Therefore, the operation principle of the frequency stability compensation transmitter 31 and the frequency stability compensation receiver 32 according to the present invention will be described with reference to FIG.

In order to facilitate understanding, specific frequency values of the above-described partial devices will be described by way of example. First, the frequency stability in the frequency stability compensation transmitter 31 Δα ( ± 1 ppm Reference oscillation frequency in the reference oscillator 31a for transmission (1 + Δα) f _r ( (1-1 × 0.000001) × 24MHz to (1 + 1 × 0.000001) × 24MHz = 23.999999MHz to 24.000001MHz )

Reference oscillation frequency (24 MHz ) Signal (1 + Δα) f _r Low frequency waveforms of the same magnitude but different frequency bands (1.7 GHz ) First local oscillator 31b and high frequency type 18 for transmission GHz ) Are simultaneously output to the first subcarrier generator 31d and the second subcarrier generator 31e which output subcarriers similar to the frequencies of the second local oscillator 31c for transmission and the first local oscillator 31b for transmission.

The transmission intermediate frequency converting unit 31f is a low frequency local oscillation frequency including the frequency change range output from the transmitting first local oscillator 31b. (1 + Δα) f _{L One} Of 1.7 GHz 1.8 received from the base station GHz Signal for mobile communication of frequency f _s ) 100 by mixing MHz It is converted to the low frequency band of and output.

The transmission band pass circuit part 31g extracts a low frequency band mobile communication signal from the intermediate frequency signal output from the transmission intermediate frequency conversion part 31f. MHz The low frequency of is input to the power synthesis section 31h.

From the first subcarrier generator 31d (100-6) MHz Frequency and the second subcarrier generator 31e from (100 + 6) MHz Frequency is outputted and synthesized by each frequency signal outputted from the band pass circuit section 31h by the power combining section 31h.

The mobile communication signal component and the first and second subcarrier signal components output from the power synthesizing unit 31g are outputted from the high frequency local oscillation frequency 18 output from the transmitting second local oscillator 31c. GHz of (1 + Δα) f _{L 2} And 18.1, which are mixed by the ultra-high frequency converter 31i for transmission, which is a high-frequency signal for mobile communication. GHz of f _s + (1 + Δα) (f _{L 2} -f _{L One} ) With, 18.094, 18.106 GHz Is a very high frequency signal for subcarriers f _s + (1 + Δα) (f _{L 2} + f ₁ ) , f _s + (1 + Δα) (f _{L 2} + f ₂ ) Is sent out.

In addition, as shown in Figure 4b, in the frequency stability compensation receiver 32, the receiving reference oscillator 32a is initially a reference frequency ( f _r ) And the frequency change according to the frequency change ( f _r × Δβ Outputs a reference frequency signal containing).

Initially it was a reference frequency signal 1 + Δβ Is generated, the signal component passing through the reference oscillation frequency converter 32j is a frequency and a frequency change range oscillated by the transmission device 31 for frequency stability compensation after all subcarriers are removed. 1 + Δα Only the reference frequency signal remains.

Therefore, when the ultra-high frequency signal is input to the frequency stability compensation receiver 32, the reference oscillation frequency converter 32j passes through. (1 + Δα) f _r Signal components are simultaneously input to the switching circuit portion 32b and the receiving first local oscillator 32d. That is, after the initial stage by the switching action of the switching circuit section 32b (1 + Δα) f _r The signal component is input to the second local oscillator 32c.

That is, the switching circuit part 32b is initially a reference frequency signal generated by its receiving reference oscillator 32a. (1 + Δβ) f _r Is generated, but the initial after the microwave signal is input (1 + Δα) f _r When a signal of a component is detected, the switching action is used (1 + Δα) f _r The signal is selected and used instead of the reference oscillator.

The reception intermediate frequency conversion unit 32e is a mobile communication ultra-high frequency signal 18.1 transmitted from the frequency stability compensation transmitter 31. GHz ) And sub-carrier ultra-high frequency signals (18.094, 18.106) GHz ) And the output from the second local oscillator 32c (1 + Δα) f _r High frequency type with frequency range of change (18 GHz ) Mixing with the negative component signal of local oscillation frequency, respectively, 0.1, 0.094, 0.106 GHz The frequency of is output.

The signal components of the low frequency band output from the reception intermediate frequency conversion unit 32e are distributed in different directions by the power distribution unit 32f, and the intermediate frequency 100 by the reception band pass circuit unit 32g. MHz , 94 MHz And 106 MHz Low frequency band (100) MHz Signal component for mobile communication is extracted, and the first subcarrier 94 is output from the intermediate frequency signal outputted from the power distribution unit 32f by the first subcarrier band pass circuit portion 32h. MHz The second subcarrier 106 from the intermediate frequency signal outputted from the power distribution unit 32f by the second subcarrier band pass circuit section 32i. MHz Extract the signal.

The reference oscillation frequency converter 32j synthesizes the difference between the signals output from the first subcarrier band pass circuit part 32h and the second subcarrier band pass circuit part 32i to remove the subcarriers, and receives the removed signal. It is output simultaneously to one local oscillator 32d and the switching circuit part 32b.

The important point here is that the frequency change width generated in the initial stage when the frequency stability compensation receiver 32 first operates. f _r × Δβ Reference frequency signal (1 + Δβ) f _r However, the initial stage is followed by the subcarrier canceled as the received ultra-high frequency signal passes through the reference oscillation frequency converter 32j, and the frequency change width generated in the transmitter 31 for frequency stability compensation. 1 + Δα Frequency bands for and subcarriers (12 MHz : f ₂ -f ₁ ) Is printed. That is, the frequency signal component output from the reference oscillation frequency converter 32j is (1 + Δα) (f ₂ -f ₁ ) Only appears.

The reference oscillation frequency converter 32j is a signal of the difference between the second subcarrier signal component and the first subcarrier signal component. f ₂ -f ₁ The output frequency of the reference oscillator is output by converting the frequency multiples by A times, so that A times is n or 1 / n times.

A is a frequency divider, and the oscillation frequency 24 of the transmission reference oscillator 31a generated in the frequency stability compensation transmitter 31 is shown. MHz ) And the frequency bands of two subcarriers (12 MHz The frequency is multiplied by A by the difference from). That is, in the present embodiment, 'A = 2' is applied and twice the frequency is matched.

Therefore, when the frequency difference between the two subcarrier components generated by the frequency stability compensation transmitter 31 is set to be n (or 1 / n) times the reference oscillator frequency, A of the frequency stability compensation receiver 32 Is set to 1 / n (or n) times so that the reference oscillator frequency of the transmitter 31 for frequency stability compensation 1 + Δα Can be equally used in the receiver 32 for frequency stability compensation.

In the mobile communication frequency converter 32k, the mobile communication output 100 is output from the band pass circuit 32g for transmission. MHz ) Signal component f _s- (1 + Δα) f _{L One} For low frequency output to the first local oscillator 32d for receiving (1.7) GHz ) Signal component (1 + Δα) f _{L One} To change the frequency variation of the transmission reference oscillator 31a generated by the frequency stability compensation transmitter 31 (1 + Δα) f _{L One} Is offset, the final value is 1.8 GHz Signal for mobile communication of frequency f _s ) Will remain.

Accordingly, the final signal output from the mobile communication frequency converter 32k is a frequency change value corresponding to the frequency stability of the reference oscillators 31a and 32a. Δα , Δβ Only the mobile communication signal fs which is not affected by) is transmitted to the mobile station or another base station.

In the repeater system for compensating the frequency stability of a mobile communication frequency signal using a subcarrier according to the present invention constructed and acting as described above, the stability of the reference oscillation frequency in the repeater using ultra high frequency influences the frequency stability of the signal of the mobile communication frequency band. Compensation using the subcarrier also improves the transmission performance and quality of the mobile communication frequency band signal, and improves the reliability of the microwave repeater, thereby facilitating the installation and maintenance of the repeater.

Claims (6)

After amplifying the mobile communication frequency signal received from the base station, it is mixed with the local oscillation frequency for intermediate frequency conversion and converted into the intermediate frequency band, synthesized with a plurality of subcarriers, and then mixed with the local oscillation frequency for ultra-high frequency conversion for the ultra high frequency band. A frequency stability compensation transmitter converting the signal and transmitting the signal; And The ultra-high frequency signal transmitted from the frequency stability compensation transmitter is mixed with the local oscillation frequency for intermediate frequency conversion and converted into the intermediate frequency band, and subcarrier frequencies are extracted and converted to the reference oscillation frequency, respectively. A subcarrier comprising a receiver for frequency stability compensation, which is mixed with a local oscillation frequency for mobile communication frequency conversion, converts into a mobile communication frequency band signal, and outputs a signal whose frequency stability is compensated for and transmits it to a mobile station or another base station. Repeater system for frequency stability compensation. The apparatus of claim 1, wherein the frequency stability compensation transmitter; Frequency stability Δα Reference oscillation frequency (1 + Δα) f _r A reference oscillator for transmitting a transmission; A reference oscillation frequency output from the transmission reference oscillator (1 + Δα) f _r A first local oscillator for transmission and a second local oscillator for outputting a local oscillation frequency for use in converting the mobile communication frequency signal into an intermediate frequency band and an ultrahigh frequency band, respectively; A first subcarrier generator and a second subcarrier generator for outputting subcarriers in an intermediate frequency band having a frequency difference from each other by n times the reference oscillation frequency output from the transmission reference oscillator; Bandwidth received from base station ΔB And the center frequency f _s A transmission intermediate frequency conversion unit for amplifying a mobile communication frequency band signal and mixing with the local oscillation frequency output from the first local oscillator for conversion to an intermediate frequency band; A band pass circuit unit for extracting only a signal component from an intermediate frequency band signal output from the intermediate frequency converter; A power synthesizer for synthesizing respective frequencies and signals output from the first subcarrier generator, the second subcarrier generator, and the band pass circuit for transmission; And Transmission ultra-high frequency for transmitting the ultra-high frequency band relay signal including the sub-carrier frequency component by mixing the intermediate frequency band signal including the sub-carrier frequency component from the power synthesis unit and the local oscillation frequency output from the second local oscillator for transmission Repeater system for frequency stability compensation using a subcarrier, characterized in that consisting of a conversion unit. The apparatus of claim 1, wherein the receiver for compensating for frequency stability; Frequency stability Δβ Reference oscillation frequency (1 + Δβ) f _r A reference oscillator for receiving the output; Initially, the switching circuit unit for selecting a reference oscillation frequency output from the receiving reference oscillator, the initial next selects a reference oscillation frequency generated from the received signal; A second local oscillator and a first local oscillator for receiving a reference oscillation frequency selected from the switching circuit unit and outputting a local oscillation frequency for use in converting an ultrahigh frequency signal into an intermediate frequency band and a mobile communication frequency band, respectively; A reception intermediate frequency for amplifying an ultrahigh frequency band signal including a subcarrier frequency component transmitted from the frequency stability compensator and mixing with a local oscillation frequency output from the reception second local oscillator to convert it into an intermediate frequency band. A conversion unit; A power distribution unit for distributing intermediate frequency signals output from the reception intermediate frequency conversion unit in different directions; A reception band pass circuit unit for extracting only a signal component from an intermediate frequency band signal including a subcarrier frequency output from the power distribution unit; A first subcarrier band pass circuit section for extracting a first subcarrier frequency from an intermediate frequency band signal output from the power divider; A second subcarrier band pass circuit unit for extracting a second subcarrier frequency from an intermediate frequency band signal output from the power distribution unit; A reference oscillation frequency converter for outputting a reference oscillation frequency by combining two frequencies output from the first subcarrier band pass circuit part and the second subcarrier band pass circuit part; A multiplier converter configured to frequency-shift the signal output from the reference oscillation frequency converter, and then simultaneously output the signal to the receiving first local oscillator and the switching circuit unit; And a subcarrier for converting the intermediate frequency band signal output from the reception band pass circuit part and the local oscillation frequency output from the reception first local oscillator into a mobile communication frequency band signal. Repeater system for frequency stability compensation. The method of claim 2, And a frequency of 1 / n times instead of n times the reference frequency signal output from the transmitting reference oscillator. 4. The apparatus of claim 3, wherein the multiplier converter; Repeater system for frequency stability compensation using subcarriers, characterized in that the frequency is multiplied by n or 1 / n times the difference between the oscillation frequency of the transmission reference oscillator generated in the frequency stability compensation transmitter and the frequency band of the two subcarriers . The method of claim 3, wherein the switching circuit unit; Initially, the reference frequency signal generated by its reference oscillator (1 + Δβ) f _r Is generated, but the initial after the microwave signal is input (1 + Δα) f _r Signal of the component is detected, (1 + Δα) f _r And a switching action so that a signal is selected instead of the receiving reference oscillator.