KR100507581B1 - Wireless repeater apparatus and method for correcting a reference frequency using the same - Google Patents

Abstract

The present invention relates to a wireless repeater and a reference frequency correction method thereof. In the present invention, a reference frequency generated by a reference frequency generator is preset in communication with a GPS satellite (Global Position System satellite) in a part of the device. By establishing a series of module environments that can be newly calibrated to standard values, this enables the reference frequency generator to localize high-quality reference frequencies that maintain a stable center frequency even under adverse conditions such as manufacturing technology limitations and changes in the surrounding environment. Guide the oscillation frequency mixer for easy input. According to the implementation of the present invention, when the stability of the reference frequency input from the reference frequency generator to the local oscillation frequency generator side is maximized, the stability of the locally generated oscillation frequency can also be optimized in succession. As a result, the signal processing function of the frequency mixer which depends on the operation of the local oscillation frequency generator can be improved to a certain level or more. As a result, in the environment of the present invention in which the signal processing function of the frequency mixer is improved, the center frequency of the signal received by the receiving side mobile communication device can naturally be stably matched with the center frequency of the sender signal output from the base station. For example, the caller using the calling party mobile station can easily achieve a normal call without any problem with the receiver located in the shaded area.

Description

Wireless repeater apparatus and method for correcting a reference frequency using the same}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless relay device, and more particularly, to a reference frequency generated by a reference frequency generator in advance by communicating with a Global Position System satellite (hereinafter, referred to as a "GPS satellite"). By constructing a series of module environments that can be newly calibrated to the set standard values, the reference frequency generator can generate a high quality reference frequency that maintains a stable center frequency even under adverse conditions such as manufacturing technology limitations and environmental changes. The present invention relates to a wireless repeater that can greatly improve the call quality between an arbitrary source / receive side mobile communication unit by guiding the input easily to a local oscillation frequency mixer. Moreover, the present invention relates to a reference frequency correction method of such a wireless relay device.

As shown in Fig. 1, under the conventional wireless communication environment, if the receiving mobile communication device 2 is a series of shadowed areas, for example, "a remote area from the base station 3", "closed area such as the underground, etc." "," Area where the call volume is congested "or the like, the signal output from the source mobile communication unit 1 cannot be transmitted to the receiving mobile communication unit 2 normally due to a series of path loss. The caller will not be able to make a stable call with the intended recipient.

In view of such a problem in the related art, a plurality of repeaters 4 are provided in an intermediate region of each base station 3, and through the repeater 4, the call service area extension of the base station 3 is induced to receive the receiving side. Even when the mobile communication device 2 is located in the shadowed area, a method of guiding the signal output from the calling mobile communication device 1 to the receiving mobile communication device 2 can be normally delivered.

In this case, each repeater 2 is provided with a series of transmit and receive antennas 4a and 4b, and after receiving a series of signals through the preceding transmit and receive antennas 4a and 4b, The wireless repeater 100 amplifies the completed signal, converts the frequency of the amplified signal, and then transmits the signal to another repeater or the receiving side mobile communication unit 2 through the transmitting and receiving antennas 4a and 4b. Is provided.

At this time, as shown in Figure 2, the wireless relay 100 according to the prior art has a first and second frequency separators (116, 117) for separating the frequency of the received / transmitted signal, and the first and second frequency Between the separators 116 and 117, a first low noise amplifier 101, a first frequency mixer 102, a first performing a signal processing process in a forward direction (i.e., from the base station 3 to the receiving mobile communication unit 2). The filter 103, the first intermediate frequency amplifier 104, the second frequency mixer 105, the first high power amplifier 106, and the like, in the reverse direction (i.e., from the receiving mobile communication unit 2 to the base station 3). The second low noise amplifier 110, the third frequency separator 111, the second filter 112, the second intermediate frequency amplifier 113, the fourth frequency mixer 114, and the second high power amplifier performing the signal processing process. 115 and the like are arranged.

Here, as shown in the figure, the first frequency mixer 102 receives a series of first local oscillation frequencies through the first local oscillation frequency generator 107 and then forwards the first local oscillation frequency in the forward direction. Mixing with the signal in progress, and generates a series of intermediate frequency signal, the second frequency mixer 105 receives a series of second local oscillation frequency through the second local oscillation frequency generator 109 Thereafter, the second local oscillation frequency is mixed with a signal passing through the first intermediate frequency amplifier 104 to generate a series of high frequency signals, and the generated high frequency signals are collected by the second frequency separator 117 and the transmit / receive antenna. (4b) and the like, and transmits to the other repeater or the receiving side mobile communication device (2).

When the operation of the first and second frequency mixers 102 and 105 is completed, the weak signal on the side of the base station 3 received by the transmitting / receiving antenna 4a is amplified and converted to a stable signal. After being upgraded, it is possible to transmit to the receiving side mobile communication device 2, so that even if the receiving side mobile communication device 2 is located in the shadow area, the signal output from the originating mobile communication device 1 is received. It can be delivered to the mobile communication normally.

Under this conventional system, as mentioned above, the first and second frequency mixers 102 and 105, which play a major role in the signal relaying process, depend on the first and second local oscillation frequency generators 107 and 109, As a result, the first and second local oscillation frequencies output from the first and second local oscillation frequency generators 107 and 109 have a normal function of the first and second frequency mixers 102 and 105. It will have a huge impact.

In view of the importance of such a matter, in the related art, a reference frequency generator 108 that forms a series of signal connection relationships with the first and second local oscillation frequency generators 107 and 109 is further disposed on a part of the wireless relay device 100. Through the reference frequency generator 108, the predetermined reference frequency preset in the standard state is stably input to the first and second local oscillation frequency generators 107 and 109 so that the first and second local oscillation frequency are stable. The first and second local oscillation frequencies input from the generators 107 and 109 to the first and second frequency mixers 102 and 105 are provided to guide the environment so as to maintain a stable center frequency at all times. In this case, the reference frequency generator 108 may be, for example, TCXO (Temperature Controlled Crystal Oscillator; hereinafter referred to as "TCXO"), OXO (Oven Compensate Crystal Oscillator, hereinafter called "OCXO"). And the like) may be utilized.

In such a conventional wireless relay device, if, of course, the reference frequency generator 108 such as TCXO, OCXO, or the like exerts its normal function, the first and second frequencies from the first and second local oscillation frequency generators 107 and 109 may be used. The first and second local oscillation frequencies input to the mixers 102 and 105 are able to maintain a stable central frequency at all times without any problems, and as a result, the first and second frequency mixers 102 and 105 also have functions given to them. Will be able to perform normally.

However, since it is almost impossible to manufacture a fully functional TCXO, OCXO, or the like at the current level of manufacturing technology, the conventional reference frequency generator 108 has a standard state in which the reference frequency to which it is output has a stable center frequency. In spite of being set to the reference frequency of, in practice, a problem arises in that a series of error frequencies in which the central frequency fluctuates greatly is input to the first and second local oscillation frequency generators 107 and 109.

For example, as shown in FIG. 3, the reference frequency generator 108 manufactured under the conventional manufacturing conditions is set to the reference frequency Fs in a standard state in which the reference frequency to be output is about 10 repetitive pulses. Nevertheless, it causes a problem in that a series of error frequencies F1 having about 20 repetitive pulses are actually input to the first and second local oscillation frequency generators 107 and 109.

Furthermore, since the conventional reference frequency generator 108 is a precise device that responds very sensitively to the environment around the wireless repeater 100, for example, temperature change, power voltage change, mechanical vibration, and the like, the manufacturing technology is improved. Thus, even if the initial function of the reference frequency generator 108 is upgraded to some extent, the reference frequency generator 108 may not normally perform a stable function unless the surrounding environment is greatly improved. As mentioned above, the frequency generator 108 is actually a series of error frequencies in which the center frequency fluctuates greatly, even though the reference frequency to be output is preset to the reference frequency Fs in a standard state with a stable center frequency. The problem of inputting F1 to the first and second local oscillation frequency generators 107 and 109 is repeated. It is good.

As described above, the conventional reference frequency generator 108 may not perform a normal function due to the limitations of manufacturing technology, environmental changes, etc., and thus, the first and second local oscillation frequency generators 107 and 109 may generate a series of error frequencies. In the aftermath, the first and second local oscillation frequency generators 107 and 109 also input the first and second frequency mixers 102 and 105 into a series of local oscillation frequencies of which the central frequency fluctuates greatly. As a result, the first and second frequency mixers 102 and 105 also have no choice but to transmit, for example, the signal of which the central frequency fluctuates to the receiving side mobile communication device 2.

In this case, via the wireless relay device 100, the center frequency of the signal that is received by the receiving side mobile communication device 2 must be significantly different from the center frequency of the signal output from the base station 3, and eventually, the reception Due to the signal filtering action of the side mobile communication device 2 itself, for example, a band pass filter action, the signal output from the base station 3 is inevitably damaged. As a result, the caller using the originating mobile communication device 1 is damaged. Despite the assistance of each of the repeaters (4), can not make a normal call with the receiver located in the shaded area.

Accordingly, an object of the present invention is to establish a series of module environments that can newly correct the reference frequency generated by the reference frequency generator to a preset standard value through communication with GPS satellites in some areas of the device, and thereby In addition, the reference frequency generator guides the easy input of a high quality reference frequency into the local oscillation frequency mixer even under adverse conditions such as manufacturing technology limitations and changes in the surrounding environment.

Another object of the present invention is to maximize the stability of the reference frequency input from the reference frequency generator to the local oscillation frequency generator side, and further, by optimizing the stability of the local oscillation frequency generated by the local oscillation frequency generator in succession, It is to improve the signal processing function of the frequency mixer depending on the operation of the frequency generator to a certain level or more.

Another object of the present invention is to improve the signal processing function of the frequency mixer by ensuring the stability of the reference frequency and the local oscillation frequency, through which the center frequency of the signal transmitted by the receiving side mobile communication from the base station By inducing the signal to be stably matched with the center frequency of the signal, it is to guide the caller using the calling party's mobile communication to easily achieve a normal call without any problems with the receiver located in the shadow area.

Still other objects of the present invention will become more apparent from the following detailed description and the accompanying drawings.

In order to achieve the object as described above, the present invention is provided from the base station while directly and indirectly communicating with any base station and a GPS satellite (Global Position System satellite) with a transmitting and receiving antenna and a GPS communication antenna. It is installed inside a repeater that relays a sender signal to a specific receiver side mobile communication device or relays a receiver signal outputted from the specific receiver side mobile communication device to the base station, and generates a predetermined local oscillation frequency using a series of reference frequencies. Then, the generated local oscillation frequency is mixed with the frequency of the sender signal or the receiver signal, amplified the mixed sender signal or receiver signal, and then selected and relayed to the specific receiver-side mobile communication station or base station. A relay unit; Through the GPS communication antenna, a series of signal connection relationships are formed with the GPS satellite, and after receiving predetermined time information from the GPS satellite periodically through the GPS communication antenna, the received time information is utilized. A reference frequency generating unit for generating a reference frequency for correcting the reference frequency of the signal relay unit; and forming a series of signal connection relationships with the signal relay unit and the reference frequency generating unit, Before the transmission time, the reference frequency is extracted from the signal relay unit, and then within the same pulse generation parallax of the reference frequency generated by the reference frequency generating unit, the reference frequency is corrected according to a predetermined standard frequency, Generate a series of calibration reference frequencies and generate the completed calibration reference frequencies A reference frequency correction unit for transmitting a reference frequency correction unit to the signal relay unit, wherein the reference frequency correction unit extracts the reference frequency from the signal relay unit and generates and outputs a test frequency having the same form as the reference frequency. A module; After forming a series of signal feedback relations with the frequency oscillation module, and repeating and comparing the pulse number of the test frequency with the pulse number of the standard frequency within the same pulse generation parallax of the reference frequency, According to the comparison result, the wireless relay comprising a combination of a reference frequency correction controller for controlling the frequency oscillation module to induce a correction reference frequency having a pulse number equal to the number of pulses of the standard frequency can be generated Start the device.

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Hereinafter, with reference to the accompanying drawings, a wireless repeater and a reference frequency correction method thereof according to the present invention will be described in more detail.

As shown in Fig. 4, under the scheme of the present invention, the base station 3 installs a plurality of repeaters 4 in any predetermined intermediate region, and through this repeater 4, expands its call service area. By inducing, even when the receiving side mobile communication device 2 is located in the shaded area, the caller signal output from the transmitting side mobile communication device 1 can be normally transmitted to the receiving side mobile communication device 2.

Under such a scheme, the repeater 4 of the present invention specifies the caller signal output from the base station 3 (or other repeater) while communicating directly or indirectly with the base station 3 (or other repeater) and the GPS satellites. The procedure for relaying to the receiver side mobile communication unit 2 or for relaying the receiver signal output from the specific receiver side mobile communication unit 2 to the base station 3 (or other repeater) is optionally performed.

In this case, the repeater 4 may communicate with the base station 3 (or other repeater) or the series of transmit / receive antennas 4a and 4b and the GPS satellite 300 for communicating with the receiving side mobile communication device 2. The GPS communication antenna 4c is provided, and after receiving a series of signals through the preceding transmitting and receiving antennas 4a and 4b, the received signal is amplified and the frequency of the amplified signal is converted. Thereafter, a radio relay apparatus 200 inherent to the present invention is provided which transmits this signal to another repeater or a receiving side mobile communication apparatus via the transmit / receive antennas 4a and 4b.

At this time, as shown in Figure 5, the wireless repeater 200 of the present invention is largely composed of a combination of the signal relay unit 201, the reference frequency generation unit 220, the reference frequency correction unit 230 and the like.

In this case, the signal relay unit 201 generates a predetermined local oscillation frequency using a series of reference frequencies, and then mixes the generated local oscillation frequency with the frequency of the sender signal or the frequency of the receiver signal, and mixes the completed caller. Amplifies a signal or a receiver signal, and selects and relays the signal to a specific receiver-side mobile communication device 2 or a base station 3.

In addition, the reference frequency generating unit 230 is a predetermined time information from the GPS satellite 300 in a state of forming a series of signal connection relationship with the GPS satellite 300 via the preceding GPS communication antenna 4c. After receiving periodically, by using the received time information, and serves to generate a series of reference frequencies.

In addition, the reference frequency correction unit 220 forms a series of signal connection relationships with the preceding signal relay unit 201 and the reference frequency generating unit 230, and the caller signal by the signal relay unit 201 or Before transmission of the receiver signal, the reference frequency is extracted from the signal relay unit 201, and then within the same pulse generation parallax of the reference frequency, the reference frequency is corrected according to a predetermined standard frequency, and a series of corrected reference frequencies are obtained. And transmits the generated corrected reference frequency to the signal relay unit 201.

At this time, as shown in the figure, the preceding signal relay unit 201 has a forward direction (that is, a base station (B) between the first and second frequency separators 217 and 218 and the first and second frequency separators 217 and 218. 3) a first low noise amplifier 202, a first frequency mixer 203, a first filter 204, and a first intermediate frequency amplifier 205 for performing a signal processing process to the receiving side mobile communication device 2). , A second frequency mixer 206, a first high power amplifier 207, and the like.

Here, the first frequency separator 217, for example, serves to separate the frequency of the sender signal received by the transmission and reception antenna 4a, and the first low noise amplifier 202 is the first frequency separator 217. It amplifies the caller signal via the signal and suppresses the noise of the caller signal.

In addition, the first filter 204 selectively passes only the intermediate frequency signal of a specific side band among the intermediate frequency signals via the first frequency mixer 203 to be described later. The frequency amplifier 205 amplifies the intermediate frequency signal via the first first filter 204.

In addition, the first high power amplifier 207 serves to amplify the sender signal via the second frequency mixer 206 to be described later, and the second frequency separator 218 is, for example, a transmit / receive antenna 4b. It separates the frequency of the caller signal sent through).

In this case, the first frequency mixer 203 disposed between the first low noise amplifier 202 and the first filter 204 receives a series of first local oscillation frequencies through the first local oscillation frequency generator 210. Thereafter, the first local oscillation frequency is mixed with the sender signal traveling in the forward direction, thereby generating a series of intermediate frequency signals.

In addition, the second frequency mixer 206 disposed between the first intermediate frequency amplifier 205 and the first high power amplifier 207, via the second local oscillation frequency generator 208, receives a series of second local oscillation frequencies. After receiving the input, the second local oscillation frequency is mixed with a signal passing through the first intermediate frequency amplifier 205 to generate a series of high frequency transmitter signals, and the generated high frequency transmitter signals are generated by the first high power amplifier 207. Through the second frequency separator 218 or the like, it transmits to another repeater or the receiving side mobile communication device (2).

Here, as described above, the first and second frequency mixers 203 and 206, which play a major role in the signal relaying process, depend on the first and second local oscillation frequency generators 210 and 208 to perform a series of frequency mixing processes. Therefore, the first and second local oscillation frequencies output from the first and second local oscillation frequency generators 210 and 208 have a significant influence on the normal functioning of the first and second frequency mixers 203 and 206. do.

At this time, the reference frequency generator 209 forming a series of signal connection relationships with the first and second local oscillation frequency generators 210 and 208 stably transmits a predetermined reference frequency to the first and second local oscillation frequency generators 210 and 208. By inputting, the environment that guides the first and second local oscillation frequencies inputted from the first and second local oscillation frequency generators 210 and 208 to the first and second frequency mixers 203 and 206 can always maintain a stable center frequency. to provide. Of course, in this case, as mentioned above, TCXO, OCXO, or the like may be utilized as the reference frequency generator 209.

Here, as shown in the figure, the signal processing is performed between the first and second frequency separators 217 and 218 in the reverse direction (i.e., from the receiving mobile communication unit 2 to the base station 3) in addition to the above components. The second low noise amplifier 211, the third frequency separator 212, the second filter 213, the second intermediate frequency amplifier 214, the fourth frequency mixer 215, the second high power amplifier 216 to perform the process ) Are further arranged, the specific operation of each of these components is the first low noise amplifier 202, the first frequency mixer 203, the first filter 204, the first intermediate frequency amplifier 205, Since the second frequency mixer 206, the first high power amplifier 207, and the like are almost the same, detailed description thereof will be omitted.

On the other hand, as shown in the figure, together with the preceding signal relay unit 201, the reference frequency correction unit 220, which constitutes the main component of the present invention, the frequency oscillation module 224, the frequency oscillation module 224 A reference frequency correction controller 221 that forms a series of signal feedback relations with the frequency branching module 226, the D / A converter 225, and the frequency controlled by the reference frequency correction controller 221. The counter 223, the oscillation power supply module 222, and the like are disposed. In this case, for example, a voltage controlled oscillator (VC-OCXO: Voltage Controlled-Oven Compensate Crystal Oscillator) may be used as the frequency oscillation module 224.

In this case, the frequency oscillation module 224 extracts the previous reference frequency from the reference frequency generator 209 of the signal relay unit 201, and then generates and outputs a test frequency having the same form as the reference frequency. The reference frequency correction controller 221 repeats and compares the number of pulses of the test frequency with the number of pulses of the standard frequency within the same pulse generation parallax of the reference frequency acquired from the reference frequency generating unit 230, and according to the comparison result. In addition, the frequency oscillation module 224 is controlled to induce a correction reference frequency having a pulse number equal to the number of pulses of the standard frequency to be generated.

In addition, the frequency branch module 226 branches the test frequency output from the frequency oscillation module 224 in a state in which a series of signal connections are formed with the reference frequency correction controller 221 and the frequency oscillation module 224. Afterwards, the branched test frequency is selected and returned to the reference frequency correction controller 221, and the D / A converter 225 converts the test frequency output from the previous frequency branch module 224 into an analog signal. And inputs the converted test frequency to the reference frequency correction controller 221.

In addition, the frequency counter 223 forming a series of signal connection relationships with the previous reference frequency correction controller 221, under the control of the reference frequency correction controller 221, within the same pulse generation time difference of the previous reference frequency, It counts the number of pulses of the test frequency, the oscillation power supply module 222 is a reference signal in a state of forming a series of signal connection with the reference frequency correction controller 221 and the frequency oscillation module 224, Under the control of the frequency correction controller 221, the oscillation voltage state of the frequency oscillation module 224 is selectively adjusted to induce a pulse number increase or decrease of the test frequency generated thereby.

As described above, the wireless relay device 200 according to the present invention can correct the reference frequency of the reference frequency generator 209 provided in the signal relay unit 201 as well as a series of signal relay units 201. The reference frequency correction unit 220, the reference frequency generation unit 230, and the like are further disposed.

Under the conventional system, since the radio repeater does not have any other device capable of correcting the reference frequency in addition to the signal relay unit, the reference frequency generator may be affected by manufacturing technology limitations and environmental changes. However, even when a series of error frequencies were inputted to the first and second local oscillation frequency generators due to failure to perform a normal function, they could not be flexibly responded to. In the aftermath, the first and second local oscillation frequency generators were used. Problem of inputting an unstable local oscillation frequency to the first and second frequency mixers, and the problem that the first and second frequency mixers are forced to transmit an unstable signal to, for example, a receiving side mobile communication device. There was no choice but to accept it.

As a result, under the conventional wireless relay system, the center frequency of the signal received by the receiving side mobile communication device has to be greatly different from the center frequency of the signal output from the base station. As a result, the signal filtering of the receiving side mobile communication device itself is performed. The signal output from the base station was inevitably damaged due to the action of, for example, bandpass filter, so that the caller using the calling mobile station, in spite of the assistance of each repeater, had a normal call with the receiver located in the shaded area. Could not be achieved.

However, unlike the prior art, the wireless relay device 200 of the present invention can correct the reference frequency of the reference frequency generator 209 provided in the signal relay unit 201 as well as a series of signal relay units 201. Since the reference frequency correcting unit 220, the reference frequency generating unit 230, and the like are additionally arranged, the reference frequency generated by the reference frequency generator 209 is the reference frequency correcting unit 220, the reference frequency generating unit. The reference frequency generator 209 maintains a stable center frequency even under adverse conditions such as manufacturing technology limitations and environmental changes in the surroundings. A high quality reference frequency can be easily input to the first and second local oscillation frequency mixers 210 and 208.

According to the embodiment of the present invention, when the stability of the reference frequency input from the reference frequency generator 209 to the local oscillation frequency generators 210 and 208 is maximized, the stability of the locally generated oscillation frequency is also continuously optimized. In the aftermath, the signal processing function of the first and second frequency mixers 203 and 206 depending on the operation of the first and second local oscillation frequency generators 210 and 208 can also be improved to a certain level or more.

As described above, under the environment of the present invention in which the signal processing function of the first and second frequency mixers 203 and 206 is improved, the center frequency of the signal to be received by the receiving side mobile communication device 2 is naturally the sender signal output from the base station 3. It can be stably matched with the center frequency of the, and eventually, the caller using the calling mobile terminal (1) can easily achieve a normal call, without any problems with the receiver located in the shadow area.

Hereinafter, a reference frequency correction method of the wireless repeater 200 according to the present invention having the above-described configuration will be described in detail.

First, as shown in FIG. 6, the reference frequency correction controller 221 disposed in the reference frequency correction unit 220 utilizes the reference frequency generation unit 230 and the frequency oscillation module 224 to generate a series of reference frequencies. And a procedure of obtaining a reference frequency (steps S1, S2).

Within this procedure, the reference frequency generating unit 230, through the GPS communication antenna 4c, forms a series of signal connection relationships with the GPS satellite 300, and precisely from the GPS satellite 300. After receiving the time information periodically, a process of generating a series of reference frequencies, for example, 1 pulse per second (PPS) is performed by using the received time information.

In addition, the frequency oscillation module 224 performs a process of extracting a series of reference frequencies from the reference frequency generator 209 of the signal relay unit 201.

When the reference frequency and the reference frequency are secured through the foregoing procedure, the reference frequency correction controller 221 immediately utilizes the frequency oscillation module 224 to form the same form as the reference frequency on the signal relay unit 201 side. After oscillating and generating a test frequency of, the frequency branching module 226 is used to branch the test frequency into a test frequency that is easy to control and has a low error rate, and the branched test frequency is converted into a D / A converter 225. The procedure of receiving input is performed (steps S3 and S4).

Within this procedure, the frequency oscillation module 224 generates and outputs a test frequency of several tens of MHz bands having the same form as the previous reference frequency through a series of oscillation processes, and the frequency branch module 226 After dividing the test frequencies of the tens of MHz bands output from the frequency oscillation module 224 into the test frequencies of several Hz bands, for example, the branched test frequencies are selectively fed back to the reference frequency correction controller 221.

Through the above-described process, when the input of the test frequency of the completed number of Hz band is completed, the reference frequency correction controller 221 immediately uses the frequency counter 223 to determine the number of pulses of the corresponding test frequency with the same pulse of the reference frequency. The procedure of counting within the time difference occurs (step S5).

Within this procedure, the frequency counter 223 proceeds to counting the number of pulses of the test frequency F2 within the same pulse generation time difference T of the reference frequency Fb as shown in FIG. 7.

Through the above process, when the number of pulses of the test frequency F2 is secured, the reference frequency correction controller 221 immediately sets the number of pulses of the counted test frequency F2 to a predetermined standard frequency within the pulse generation parallax T of the reference frequency Fb. It is determined whether or not the number of pulses of F3 is the same (step S6).

At this time, if the number of pulses of the test frequency F2 is different from the number of pulses of the predetermined standard frequency F3, the reference frequency correction controller 221 immediately utilizes the oscillation power supply module 222 to generate the oscillation / generation voltage of the test frequency. Then, through this, a procedure of correcting the test frequency in the form of a standard frequency is carried out (step S7).

Within this procedure, the oscillation power supply module 224 selectively adjusts the oscillation voltage state of the frequency oscillation module 224, thereby inducing a process of increasing or decreasing the pulse number of the test frequency. By the action of the oscillation power supply module 224, the pulse number of the test frequency F2 can be corrected similarly to the pulse number of the standard frequency F3.

Of course, the flow from the previous steps S5 to S7 is repeatedly fed back until the number of pulses of the test frequency F2 is equal to the number of pulses of the standard frequency F3.

On the other hand, if it is determined in step S6 that the number of pulses of the test frequency F2 is equal to the number of pulses of the predetermined standard frequency F3, the reference frequency correction controller 221 immediately utilizes the frequency oscillation module 224. Then, a procedure for generating and generating a corrected reference frequency having the same number of pulses as the number of pulses of the test frequency F2 and transferring the generated corrected reference frequency to the signal relay unit (steps S8 and S9).

Within this procedure, the frequency oscillation module 224 activates a series of oscillation processes in intimate communication with the oscillation power supply module 222, and then through this oscillation process, the number of pulses equal to the number of pulses of the test frequency F2. A process of stably oscillating and generating a corrected reference frequency having a frequency and transmitting the generated corrected reference frequency to the reference frequency generator 209 on the side of the signal relay unit 201 is performed.

As a result, when all of these procedures are completed, as shown in FIG. 8, the reference frequency generator 209 is equal to the reference frequency Fs of the standard state to be output even under adverse conditions such as manufacturing technology limitations and environmental changes in the surroundings. Similarly, for example, a stable correction reference frequency F4 having about 10 repetitive pulses can be input to the first and second local oscillation frequency generators 210 and 208. As a result, the correction reference frequency is interlocked. The stability of the generated local oscillation frequency can also be subsequently optimized, and in the aftermath, the signal processing of the first and second frequency mixers 203 and 206 depending on the operation of the first and second local oscillation frequency generators 210 and 208. Functionality can also be improved beyond a certain level.

On the other hand, as shown in Figure 9, the wireless repeater 200 according to the present invention may be disposed, for example, in a "closed shadow area, such as underground UG of the building 400".

Of course, even in this case, the reference frequency correction unit capable of correcting not only a series of signal relay units 201 but also a reference frequency of the reference frequency generator 209 included in the signal relay unit 201 is provided in the apparatus 200. Since 220, the reference frequency generating unit 230, and the like are further arranged, the reference frequency generated by the reference frequency generator 209 of the signal relay unit 201 is determined by the reference frequency correction unit 220, the reference frequency. By the interlocking action of the generating unit 230, it can be newly corrected to a preset standard value. Consequently, the reference frequency generator 209 generates a stable center frequency even under adverse conditions such as manufacturing technology limitations and environmental changes in the surroundings. The high quality reference frequency to be maintained can be easily input into the local oscillation frequency generators 210 and 208. As a result, the caller using the originating side mobile communication device 1 can enter the underground UG of the building 400. Without molestation recipient and little problems, it is possible to easily achieve a normal call.

As described in detail above, the present invention establishes a series of module environments capable of newly correcting the reference frequency generated by the reference frequency generator to a predetermined standard value through communication with GPS satellites in a part of the device. This allows the reference frequency generator to easily input a high quality reference frequency into the local oscillation frequency mixer even under adverse conditions such as manufacturing technology limitations and environmental changes.

According to the implementation of the present invention, when the stability of the reference frequency input from the reference frequency generator to the local oscillation frequency generator side is maximized, the stability of the locally generated oscillation frequency can also be optimized in succession. As a result, the signal processing function of the frequency mixer which depends on the operation of the local oscillation frequency generator can be improved to a certain level or more.

As a result, in the environment of the present invention in which the signal processing function of the frequency mixer is improved, the center frequency of the signal received by the receiving side mobile communication device can naturally be stably matched with the center frequency of the sender signal output from the base station. For example, the caller using the calling party mobile station can easily achieve a normal call without any problem with the receiver located in the shaded area.

While specific embodiments of the invention have been described and illustrated above, it will be apparent that the invention may be embodied in various modifications by those skilled in the art.

Such modified embodiments should not be understood individually from the technical spirit or point of view of the present invention and such modified embodiments should fall within the scope of the appended claims of the present invention.

1 conceptually illustrates a wireless communication system according to the prior art.

Figure 2 is an illustration conceptually showing a wireless relay device according to the prior art.

3 is an exemplary diagram conceptually illustrating a reference frequency input process according to the prior art.

4 conceptually illustrates a wireless communication system employing the present invention.

5 is a conceptual diagram conceptually illustrating a wireless relay device according to the present invention.

6 is a flowchart sequentially illustrating a reference frequency correction method according to the present invention.

7 is an exemplary diagram conceptually illustrating a test frequency count process according to the present invention.

8 is an exemplary view conceptually showing a wireless relay device according to another embodiment of the present invention.

Claims (7)

With a transmitting and receiving antenna and a GPS communication antenna, relaying a caller signal output from the base station to a specific receiver side mobile communication device while directly or indirectly communicating with any base station and a GPS satellite (Global Position System satellite). It is installed in the repeater to relay the receiver signal output from a specific receiver side mobile communication to the base station, After generating a predetermined local oscillation frequency by using a series of reference frequencies, the generated local oscillation frequency is mixed with the frequency of the sender signal or the frequency of the receiver signal, and amplified by the mixed sender signal or receiver signal. A signal relay unit for selecting and relaying to the specific receiver-side mobile communication station or base station; Through the GPS communication antenna, a series of signal connection relationships are formed with the GPS satellite, and after receiving predetermined time information from the GPS satellite periodically through the GPS communication antenna, the received time information is utilized. A reference frequency generating unit for generating a reference frequency for correction of the signal relay unit side reference frequency; Form a series of signal connection relationships with the signal relay unit and the reference frequency generating unit, and extract the reference frequency from the signal relay unit before the transmitter or receiver signal is transmitted, and then by the reference frequency generating unit Within the same pulse generation parallax of the generated reference frequency, the reference frequency is corrected according to a predetermined standard frequency to generate a series of corrected reference frequencies, and a reference for transferring the generated corrected reference frequencies to the signal relay unit. A frequency correction unit, The reference frequency correction unit includes: a frequency oscillation module which extracts the reference frequency from the signal relay unit and generates and outputs a test frequency having the same form as the reference frequency; After forming a series of signal feedback relations with the frequency oscillation module, and repeating and comparing the pulse number of the test frequency with the pulse number of the standard frequency within the same pulse generation parallax of the reference frequency, And a reference frequency correction controller for controlling the frequency oscillation module to induce a correction reference frequency having a pulse number equal to the pulse number of the standard frequency according to the comparison result. . delete The reference frequency correction controller of claim 1, further comprising forming a series of signal connection relationships with the reference frequency correction controller and the frequency oscillation module, and branching the test frequency output from the frequency oscillation module. Wireless repeater further comprises a frequency branch module for selective feedback to the controller. The method of claim 1, further comprising forming a series of signal connection relationships with the reference frequency correction controller, and counting the number of pulses of the test frequency within the same pulse generation parallax of the reference frequency under the control of the reference frequency correction controller. Wireless repeater further comprises a frequency counter. The test apparatus of claim 1, wherein a series of signal connection relationships are formed with the reference frequency correction controller and the frequency oscillation module, and under the control of the reference frequency correction controller, the oscillation voltage state of the frequency oscillation module is selectively adjusted to perform the test. Wireless repeater further comprises an oscillating power supply module for inducing the increase or decrease of the pulse number of the frequency (Increase or decrease). Obtaining a series of reference frequencies and reference frequencies from the signal relay unit and the reference frequency generating unit; Generating a test frequency having the same form as the reference frequency, and counting the number of pulses of the generated test frequency within the same pulse generation parallax of the reference frequency; Determining whether the number of pulses of the counted test frequency is equal to the number of pulses of a predetermined standard frequency within the pulse generation parallax of the reference frequency; When the number of pulses of the test frequency is equal to the number of pulses of the predetermined standard frequency, a correction reference frequency having a pulse number equal to the number of pulses of the test frequency is generated, and the generated corrected reference frequency is transmitted to the signal relay unit. A reference frequency correction method for a wireless repeater comprising the step of. 7. The method of claim 6, wherein if the number of pulses of the test frequency is different from the number of pulses of the predetermined standard frequency, changing the generated voltage of the test frequency is further performed. .