KR200175473Y1 - A equipment for hindering interference of adjacent frequency - Google Patents

Abstract

The present invention relates to an adjacent frequency interference blocking device for preventing adjacent frequency interference which may be caused by frequencies adjacent to each other in a frequency band allocated to each mobile communication company in mobile communication.

A frequency detecting means for detecting a frequency of the received RF signal in order to block an RF signal of another mobile communication carrier having adjacent frequency bands by receiving the RF signal transmitted from the subscriber station in mobile communication; Magnetic frequency judging means for judging whether the detected frequency is its own frequency or a frequency of another company, and if the detected frequency and the magnetic frequency do not match according to the result determined by the magnetic frequency judging means, the RF signal corresponding to the frequency disappears. And an RF transmitting means for receiving an RF signal corresponding to the frequency and transmitting it to a repeater or a base station when the detected frequency and the magnetic frequency coincide with each other according to a result determined by the magnetic frequency judging means. Is proposed to be generated by adjacent frequencies even at high RF outputs. Has the effect of eliminating frequency interference.

Description

A equipment for hindering interference of adjacent frequency}

The present invention, in mobile communication, adjacent neighbors to prevent adjacent frequency interference that may be caused by the frequencies adjacent to each other in the frequency band assigned by each mobile carrier It relates to a wave interference suppression device.

Currently there are a number of mobile operators in Korea. In other words, there are SK Telecom and Shinseon Telecom for cellular methods, and Korea Telecom Freetel, LG Telecom, and Hansol Telecom for PCS.

Each of the mobile operators operates a mobile communication system with different frequencies assigned by the state.

1 is an exemplary diagram for describing a frequency band of a mobile communication company.

Referring to FIG. 1, FIG. 1 shows the frequency bands of SK Telecom and New Century Communications among domestic mobile telecommunications companies. SK Telecom has 824 to 835 MHz, 845 to 849 MHz, 869 to 880 MHz, and 890 to 894 MHz. New Century communication uses 835 ~ 845 MHz, 880 ~ 890 MHz frequency band.

In the above, 835 MHz, 845 MHz, 880 MHz, 890 MHz frequency bands of each carrier are adjacent to each other, where interference occurs due to adjacent frequencies.

In order to solve the above problems, conventionally, by using a filter to filter the frequency of other carriers other than the magnetic frequency to eliminate the interference phenomenon.

In the conventional method of eliminating interference by adjacent frequencies using the conventional filters, the RF signal output is increased by increasing the output of the RF signal due to the recent surge in subscribers. There is a problem with limiting the problem.

The present invention has been presented to solve the above problems, and an object of the present invention is to provide an adjacent frequency interference suppression device that eliminates adjacent frequencies generated by RF signals of a plurality of communication companies.

As a technical idea for achieving the object of the present invention, the frequency detection means for detecting the frequency of the received RF signal, and the magnetic frequency judgment for determining whether the frequency detected by the frequency detection means is the frequency of its own or other company Means, the adjacent frequency quench means for extinguishing the RF signal corresponding to the frequency if the detected frequency and the magnetic frequency do not match according to the result judged by the magnetic frequency judging means, and the detection according to the result judged by the magnetic frequency judging means. The present invention includes an RF transmission means for receiving an RF signal corresponding to the frequency and transmitting the same to the repeater frequency and the magnetic frequency to a repeater or a base station.

1 is an exemplary diagram for describing a frequency band of a mobile communication company.

2 is an adjacent frequency interference blocking device of the present invention.

Figure 3 is a flow chart for explaining the operation of the adjacent frequency interference blocking device of the present invention.

<Description of the code | symbol about the principal part of drawing>

10: antenna 20: RF receiver

30: frequency detector 40: comparator

50: magnetic frequency storage unit 60: adjacent frequency quenching unit

70: RF transmitter 80: repeater

90: base station

Hereinafter, with reference to the accompanying drawings with respect to the configuration and operation of the embodiment of the present invention will be described.

2 is a block diagram illustrating an adjacent frequency interference suppression apparatus of the present invention.

Referring to FIG. 2, the present invention detects the frequency of the RF signal received by the RF receiver 20 and the RF receiver 20 that receives the RF signal transmitted from the subscriber terminal through the antenna 10. The frequency detector 30, the magnetic frequency storage unit 50 storing the magnetic frequency of the mobile communication company, the frequency detected by the frequency detector 30 and the magnetic frequency stored in the magnetic frequency storage unit 50 Compare and match The comparator 40, the adjacent frequency quenching unit 60 for extinguishing the RF signal corresponding to the frequency if the detected frequency and the magnetic frequency do not match according to the result determined by the comparator 40 and the comparator ( When the detected frequency and the magnetic frequency match each other according to the result determined by 40), the RF transmitter 70 receives the RF signal corresponding to the frequency and transmits the RF signal to the repeater 80 and the base station 90 which will be described later. It consists of a repeater 80, the base station 90 to connect the RF signal transmitted from the transmitter 70 to the counterpart desired by the subscriber.

Referring to the operation of the present invention made of the above configuration as follows.

First, two mobile communication companies are set up to explain the operation of the present invention.

That is, the S mobile carrier uses 824 to 835 MHz, 845 to 849 MHz, 869 to 880 MHz, and 890 to 894 MHz, and the C mobile carrier uses 835 to 845 MHz and 880 to 890 MHz.

In the above 835 MHz, 845 MHz, 880 MHz, and 890 MHz, the S mobile communication company and the C mobile communication company are adjacent to each other.

In the present invention, an example of an apparatus of an S mobile telephone will be described. The RF receiver 20 of the base station 90 or the repeater 80 of the S mobile communication company receives the RF signal transmitted from the subscriber terminal through the antenna 10. The antenna 10 receives the RF signal of the C mobile communication company in the vicinity of the frequencies 835 MHz, 845 MHz, 880 MHz, and 890 MHz in the frequency band.

The RF signal received by the RF receiver 20 by mixing the RF signal of the C mobile communication company The frequency is detected by the wave detector 30. When the frequency is detected by the frequency detection unit 30, the comparator 40 is a magnetic band of 824 ~ 835 MHz, 845 ~ 849 MHz, 869 ~ 880 MHz, 890 ~ 894 MHz band stored in the magnetic frequency storage unit 50 Compare the frequency with the detected frequency. As a result of the comparison by the comparator 40, the RF signal not included in the magnetic frequency band is applied to the frequency dissipation unit 60 to be extinguished. If the RF signal is included in the magnetic frequency band, the RF transmitter 70 Is applied. The RF transmitter 70 receiving the RF signal of the magnetic frequency band applied from the comparator 40 transmits an RF signal to the repeater 80 or the base station 90 so as to connect with the counterpart desired by the subscriber, and the repeater ( 80 or the base station 90 receives the RF signal transmitted from the RF transmitter 70 and connects with the other party.

Referring to the flowchart of Figure 3 with respect to the flow of the operation of the adjacent frequency interference blocking device of the present invention in the above process as follows.

Figure 3 is a flow chart for explaining the operation of the adjacent frequency interference blocking device of the present invention.

Referring to FIG. 3, the RF receiver 20 receives the RF signal transmitted from the subscriber terminal through the antenna 10 (S100).

When the RF receiver 20 receives the RF signal in step S100, the frequency detector 30 detects a frequency from the RF signal received by the RF receiver 20 (S200).

When the RF receiver 20 detects a frequency in step S200, the comparator 40 detects the magnetic frequency stored in the magnetic frequency storage 50 and the frequency detected by the frequency detector 30. The number is compared with each other to determine whether the detected frequency is its frequency (S300).

According to the result determined in step S300, if the detected frequency is not the magnetic frequency, the comparator 40 extinguishes the detected RF signal through the adjacent frequency quenching unit 60 (S400), and if the detected frequency is the magnetic frequency. The comparator 40 allows the RF transmitter 70 to receive the detected RF signal (S500).

When the RF transmitter 70 receives the RF signal from the comparator 40 in step S500, the RF transmitter 70 transmits the received RF signal to the repeater 80 and the base station 90 (S600).

When the repeater 80 and the base station 90 receives the RF signal in step S600, the repeater 80 or the base station 90 connects to the counterpart to which the subscriber wants to make a call (S700).

Through all the above processes, the adjacent frequency interference suppression device is implemented as the present invention intends.

As can be seen from the above description, the present invention receives the RF signal transmitted from the subscriber station in mobile communication, and uses the frequency of the received RF signal to block the RF signal of other mobile communication carriers having adjacent frequency bands. When the detected frequency is compared with the stored magnetic frequency, if it does not match with each other, it is regarded as an RF signal of another mobile communication company and extinguishes. The output also has the effect of eliminating frequency interference caused by adjacent frequencies.

Claims (2)

In the mobile communication base station and repeater for receiving the RF signal transmitted from the subscriber station and connecting to the desired counterpart, Frequency detecting means for detecting a frequency of the received RF signal; Magnetic frequency judging means for judging whether the frequency detected by the frequency detecting means is a frequency of its own or a company of another company; Adjacent frequency quench means for extinguishing the RF signal corresponding to the frequency if the detected frequency and the magnetic frequency do not match according to the result determined by the magnetic frequency judging means; And an RF transmitting means for receiving an RF signal corresponding to the frequency and transmitting it to a repeater or a base station when the detected frequency and the magnetic frequency coincide with each other according to a result determined by the magnetic frequency judging means. The method according to claim 1, wherein the magnetic frequency determination means, Magnetic frequency storage unit that stores its own frequency, And a comparator configured to compare the frequency detected by the frequency detector and the magnetic frequencies stored in the magnetic frequency storage to determine whether they match each other.