KR102154658B1 - System of combining and transmitting signal of service band of each communication service provider for communication standard without guard band - Google Patents

Abstract

Disclosed is a system of combining and transmitting signals of a service band by a telecommunication service provider for a communication band without a guard band. The system comprises: a first hybrid coupler receiving a signal of each band filter to convert phases of the signals and output the signals; and a second hybrid coupler converting the phases of the signals outputted from the first hybrid coupler and outputting the signals. According to the system of combining and transmitting signals of a service band by a telecommunication service provider for a communication method without a guard band, the system has an effect of reducing mutual interference to enable signal coupling by receiving, combining, and transmitting 5G service band signals in which a guard band between service bands of a communicative enterprise does not exist as one input. Therefore, each communicative enterprise has an effect of reducing costs and easily securing installation space by pulling one aerial wire. Specifically, by combining a service band signal using a 180 degree hybrid coupler assembly and adjusting a phase inversion error of a 180 degree hybrid coupler by satellite delay control, a loss can be reduced when combining the signals and an inherent problem of the 180 degree hybrid coupler can be solved.

Description

Signal combination transmission system of service band for each carrier for communication method without guard band {SYSTEM OF COMBINING AND TRANSMITTING SIGNAL OF SERVICE BAND OF EACH COMMUNICATION SERVICE PROVIDER FOR COMMUNICATION STANDARD WITHOUT GUARD BAND}

The present invention relates to a signal combination transmission system, specifically, to a signal combination transmission system of a service band for each service provider for 5G communication, and more specifically, a signal combination transmission of a service band for each service provider for a communication method without a guard band. The present invention relates to a system, and more specifically, to a signal combining transmission system of a service band for each communication service provider including a hybrid coupler assembly capable of adjusting a phase of a 180 degree hybrid coupler.

FIG. 1 is a diagram showing a communication service band for each communication service provider in a conventional communication method and a communication service band for each communication service provider in a 5G communication method, and FIG. 2 is a configuration diagram of a relay/base station equipment for each communication service provider in a conventional 5G communication method.

As shown in (A) of FIG. 1, in the conventional 3G, 4G, etc. communication methods, a guard band exists between service bands to which each communication service provider is assigned. The guard band is located between the service bands of each communication company to prevent mutual interference.

However, in the 5G communication method, there is no guard band as shown in FIG. 1B. If there is no guard band, there is a disadvantage that interference between adjacent service bands is likely to occur.

In the case of the presence of a guard band as shown in (A) of FIG. 1, there is no interference between service bands for each service provider adjacent to each other, and thus relay/base station equipment can be shared, installed, and operated.

However, in the 5G communication method in which a guard band does not exist as shown in (B) of FIG. 1, there is a problem in that relay/base station equipment of each operator must be separately provided and operated for each operator, as shown in FIG. 2.

As a result, the cost of installing an aerial increases and it is difficult to secure an installation space.

Registered Patent Publication 10-1636880 Registered Patent Publication 10-0714867

An object of the present invention is to provide a signal combination transmission system for a service band for each service provider for a communication method without a guard band.

A signal combination transmission system for a service band for each communication service provider for a communication method without a guard band according to the object of the present invention includes: a first hybrid coupler configured to receive a signal from each band filter and convert the phase to output; It may be configured to include a second hybrid coupler that phase-converts and outputs a signal output from the first hybrid coupler.

Here, the band filter may be provided for each 5G communication service company.

Further, the first hybrid coupler and the second hybrid coupler may each be configured with 2X2 input/output ports.

According to the signal combination transmission system of service bands for each service provider for the above-described communication method without a guard band, a 5G service band signal in which a guard band does not exist between service bands of a service provider is not adjacent to each other. By being configured to receive, combine and transmit the signals as one input, there is an effect of enabling signal combining by reducing mutual interference.

For this reason, there is an effect that each communication service provider can install a single aerial to reduce cost and facilitate securing an installation space.

In particular, by combining the service band signal using a 180 degree hybrid coupler assembly, but adjusting the phase inversion error of the 180 degree hybrid coupler by satellite delay control, it reduces the loss during signal coupling and eliminates the inherent problems of the 180 degree hybrid coupler. There is an effect that can be solved.

1 is a diagram illustrating a communication service band for each communication service provider in a conventional communication method and a communication service band for each communication service provider in a 5G communication method.
2 is a configuration diagram of relay/base station equipment for each communication company in the conventional 5G communication method.
3 is a block diagram of a signal combination transmission system for a service band for each communication service provider for a communication method without a guard band according to an embodiment of the present invention.
4 is a schematic diagram of a simulation circuit of a signal combination transmission system for a service band for each communication service provider for a communication method without a guard band according to an embodiment of the present invention.
5 to 7 are frequency analysis diagrams showing service bands of each communication company.
8 to 10 are frequency analysis diagrams showing a signal combination band of a service band for each communication service provider for a communication method without a guard band according to an embodiment of the present invention.
11 to 14 are signal analysis diagrams of a hybrid coupler according to an embodiment of the present invention.

In the present invention, various modifications may be made and various embodiments may be provided, and specific embodiments will be illustrated in the drawings and will be described in detail in specific details for carrying out the invention. However, this is not intended to limit the present invention to a specific embodiment, it is to be understood to include all changes, equivalents, and substitutes included in the spirit and scope of the present invention. In describing each drawing, similar reference numerals have been used for similar elements.

Terms such as first, second, A, and B may be used to describe various elements, but the elements should not be limited by the terms. These terms are used only for the purpose of distinguishing one component from another component. For example, without departing from the scope of the present invention, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element. The term and/or includes a combination of a plurality of related listed items or any of a plurality of related listed items.

When a component is referred to as being "connected" or "connected" to another component, it is understood that it may be directly connected or connected to the other component, but other components may exist in the middle. Should be. On the other hand, when a component is referred to as being "directly connected" or "directly connected" to another component, it should be understood that there is no other component in the middle.

The terms used in the present application are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In the present application, terms such as "comprise" or "have" are intended to designate the presence of features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, but one or more other features. It is to be understood that the presence or addition of elements or numbers, steps, actions, components, parts, or combinations thereof does not preclude in advance.

Unless otherwise defined, all terms, including technical or scientific terms, used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. Terms such as those defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and should not be interpreted as an ideal or excessively formal meaning unless explicitly defined in this application. Does not.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

3 is a block diagram of a signal combination transmission system for a service band for each communication service provider for a communication method without a guard band according to an embodiment of the present invention.

Referring to FIG. 3, a signal combination transmission system 100 of a service band for each service provider for a communication method without a guard band according to an embodiment of the present invention includes a first band filter 101 and a second band filter 102. , A third band filter 103, a first hybrid coupler 104, a second hybrid coupler 105, a phase comparison module 106, a phase adjustment selection control module 107, a first phase delay module 108, It may be configured to include a second phase delay module 109, a phase comparison feedback module 110, a first antenna 111, and a second antenna 112.

The signal combination transmission system 100 of a service band for each communication service provider for a communication method without a guard band is a signal combination transmission system for a communication method without a guard band, such as a 5G communication method.

The signal combination transmission system 100 of a service band for each communication service provider for a communication method without a guard band is a 180 degree hybrid coupler assembly that receives a first band signal and a third band signal through one port and a second band through another port. It is configured to perform signal coupling through (104) (105).

In particular, in a 180-degree hybrid coupler, unlike a 90-degree hybrid coupler, it is difficult to phase-shift a broadband signal such as a 5G signal by 180 degrees. It is not easy to match the phase by finely designing the pattern length of the 180 degree hybrid coupler, and a lot of errors occur during actual operation.

However, in the present invention, the phases of the output signals at both output ports of the first hybrid coupler 104 are compared with each other to change the phases of the signals at both output ports. At this time, through the coupling of the second hybrid coupler 105, the phase is predicted and adjusted to change the phase so that the phase difference between the two output port signals becomes 0 degrees.

Accordingly, it is possible to solve the problem of the 180 degree hybrid coupler and also take advantage of canceling even-numbered harmonics of the 180 degree hybrid coupler.

Ultimately, it is possible to enable coupling of each service band that does not have a guard band, and to unify and commonize the installation of aerials (base stations, relay stations) of each communication service provider.

Hereinafter, a detailed configuration will be described.

The first band filter 101 may be configured to filter and output a first band signal, that is, a signal of 3350 MHz-3500 MHz, which is a service band of the first communication service provider (LG U Plus).

The second band filter 102 may be configured to filter and output a second band signal, that is, a signal of 3500 MHz-3600 MHz, which is a service band of a second communication service provider (KT).

The third band filter 103 may be configured to filter and output a third band signal, that is, a signal of 3600 MHz to 3900 MHz, which is a service band of a third communication service provider (SKT).

The first band is adjacent to the second band without a guard band, and the second band is adjacent to the first band and the third band, respectively, without a guard band.

The second band signal, which is an output signal of the second band filter 102, may be input through port 1 and may be input to a of the first hybrid coupler 104.

The first and third band signals of the first band filter 101 and the third band filter 103 may be input through port 2 and may be input to b of the first hybrid coupler 104.

The phase difference between the second band signal input to port 1 and the first and third band signals input to port 2 is 0 degrees.

The first hybrid coupler 104 is a 180 degree coupler rather than a 90 degree coupler mainly used in the past.

The first hybrid coupler 104 may be configured to receive and couple the second band signal and the first and third band signals, respectively, and output a coupling signal to c and d. A coupling signal having a phase difference of 0 degrees may be output to c, and a coupling signal having a phase difference of 180 degrees may be output to d.

In this case, unlike a 90-degree coupler, it is difficult for a 180-degree coupler to couple a broadband signal such as a 5G signal by spreading the phase difference by 180 degrees. The first hybrid coupler 104 must be designed by finely adjusting the pattern length, and a precise process is also required in the manufacturing process. In fact, when a 180 degree coupler is released as a product, some error occurs, not exactly 180 degree phase difference. Therefore, the 180 degree coupler is not actually used.

The second hybrid coupler 105 is also configured to perform 180 degree coupling like the first hybrid coupler 104.

The second hybrid coupler 105 may be configured to receive an output signal of the first hybrid coupler 104 with a phase difference of 180 degrees from e and f, respectively. The input signals are added to each other and output with a phase difference of 0 degrees at g and h, and are configured to have a loss of 0 dB.

By the way, like the first hybrid coupler 104, the second hybrid coupler 105 is also output with a phase difference in which the output signal is not exactly 180 degrees but has a slight error.

Accordingly, the phase difference is finely adjusted using the phase comparison module 106, the phase adjustment selection control module 107, the first phase delay module 108, and the second phase delay module 109 to output ports 3 and 4 Make sure the signals have a phase difference of exactly 0 degrees from each other.

The phase comparison module 106 may be configured to measure and compare a phase difference between signals c and d, which are output signals of the first hybrid coupler 104. It may be configured to check a phase error due to an error in manufacturing the 180 degree hybrid coupler and transmit it to the phase adjustment selection control module 107.

Here, the phase error may be a difference between 180 degrees and the actual phase difference.

The phase adjustment selection control module 107 selects one of the first phase delay module 108 or the second phase delay module 109 using the phase error transmitted from the phase comparison module 106 to determine the phase of the signal. It can be configured to delay by a phase error. That is, the phase error may be corrected and input to e and f of the second hybrid coupler 105.

At this time, the phase adjustment selection control module 107 selects any one signal that requires a phase delay from the signal of c or the signal of d, and the first phase delay module 108 or the second phase delay module 109 changes the phase. You can control the selection to delay.

The phase adjustment selection control module 107 may be configured to correct a phase error due to a 180 degree hybrid coupler. It can be corrected in two ways.

First, in the first manner, the phase adjustment selection control module 107 may be configured to correct a phase error by twice the actual phase error when correcting the phase error. When the first hybrid coupler 104 and the second hybrid coupler 105 are the same 180 degree coupler and adopted as the same product, the second hybrid coupler 105 also has the same phase error as the phase error of the first hybrid coupler 104. Assuming that an error occurs, a double phase error correction can be performed.

The second method is an error correction method based on the phase error feedback of the phase comparison feedback module 110. In the phase comparison feedback module 110, the output signals of g and h of the second hybrid coupler 105 should have a phase difference of 0 degrees from each other, but when a phase error actually occurs, the phase error is adjusted to the phase adjustment selection control module 107 ) Can be configured to feed back.

Here, the phase adjustment selection control module 107 performs a first phase correction according to the first phase error of the phase comparison module 106, and then phases the second phase error generated by the second hybrid coupler 105. It may be configured to receive feedback from the comparison feedback module 110 and additionally perform second phase correction.

Both the first method and the second method have an output signal having a phase difference of 0 degrees from each other at port 3 and port 4, and the port 3 signal and the port 4 signal respectively connect the first antenna 111 and the second antenna 112 Transmitted through. That is, the signal of port 3 is a signal of the second band, and the signal of port 4 is a signal of the first and third bands.

The phase adjustment selection control module 107 may be set to selectively perform any one of the first method or the second method.

That is, in a 5G communication method without a guard band, the first and third band signals that are not adjacent to each other are radiated as one output signal, and the second band signal that is adjacent between the two service bands is radiated as separate output signals. Can be. Overcoming the shortcomings of 5G signals without a guard band, one base station or relay station can combine and transmit the signals of each carrier.

4 is a schematic diagram of a simulation circuit of a signal combination transmission system for a service band for each communication service provider for a communication method without a guard band according to an embodiment of the present invention. 5 to 7 are frequency analysis diagrams showing service bands of each communication company, and FIGS. 8 to 10 are signal combination bands of service bands for each communication service provider for a communication method without a guard band according to an embodiment of the present invention. It is a frequency analysis diagram. 11 to 14 are signal analysis diagrams of a hybrid coupler according to an embodiment of the present invention.

4 shows a detailed configuration of a filter of each service band.

5 to 7 are data obtained by capturing signals in the service band band of each communication service provider.

8 to 10 show signals output by performing 180-degree hybrid coupling of signals in the service band band of each communication service provider. Even harmonics are generated by an amplifier inserted between the entire transmission system, and the advantage of canceling such even harmonics by 180 degree hybrid coupling can be taken. Can be combined.

In FIGS. 11 to 14, it can be seen that the signal flows of S31, S32, S41, and S42 show very low loss.

Although described with reference to the above embodiments, those skilled in the art can understand that various modifications and changes can be made to the present invention without departing from the spirit and scope of the present invention described in the following claims. There will be.

101: first band filter
102: second band filter
103: third band filter
104: first hybrid coupler
105: second hybrid coupler
106: phase comparison module
107: phase adjustment selection control module
108: first phase delay module
109: second phase delay module
110: phase comparison feedback module
111: first antenna
112: second antenna

Claims (3)

A first band filter for filtering the first band signal and outputting a signal of 3350 MHz to 3500 MHz;
A second band filter for filtering the second band signal and outputting a signal of 3500 MHz to 3600 MHz;
A third band filter for filtering the third band signal and outputting a signal of 3600 MHz to 3900 MHz;
The second band signal output from the second band filter is inputted from terminal a through port 1, and the first band signal output from the first band filter and the third band signal output from the third band filter are transferred to port 2 A coupling signal having a phase difference of 0 degrees is output through the terminal b, the received second band signal through the terminal c, and the received first band signal and the third band signal through the terminal d are 180 degrees out of phase. A first hybrid coupler for outputting a coupling signal having a;
The coupling signal output from the complex c of the first hybrid coupler is input through the terminal e, the coupling signal output from the complex d of the first hybrid coupler is input through the terminal f, and the input through the terminal e A second hybrid coupler that outputs a coupling signal having a phase difference of 0 degrees through a terminal g of the received coupling signal and outputs a coupling signal having a phase difference of 0 degrees through a terminal h of the coupling signal received through the terminal f ;
A first phase delay module for delaying the phase of the coupling signal output from only c of the first hybrid coupler and inputting it to the terminal e of the second hybrid coupler;
A second phase delay module for delaying the phase of the coupling signal output from only d of the second hybrid coupler and inputting it to the terminal f of the second hybrid coupler;
A phase comparison module that measures and compares a phase inversion error for a phase difference of 180 degrees between the coupling signal output from the complex c and the coupling signal output from the d of the first hybrid coupler;
Controls to delay the phase of the coupling signal by twice the phase inversion error by selecting either the first phase delay module or the second phase delay module using the phase inversion error compared by the phase comparison module. Phase adjustment selection control module;
A first antenna for receiving and radiating a coupling signal output from terminal g of the second hybrid coupler through port 3;
A signal combination transmission system of a service band for each communication service provider for a communication method without a guard band, including a second antenna that receives and radiates a coupling signal output from the terminal h of the second hybrid coupler through port 4.
A first band filter for filtering the first band signal and outputting a signal of 3350 MHz to 3500 MHz;
A second band filter for filtering the second band signal and outputting a signal of 3500 MHz to 3600 MHz;
A third band filter for filtering the third band signal and outputting a signal of 3600 MHz to 3900 MHz;
The second band signal output from the second band filter is inputted from terminal a through port 1, and the first band signal output from the first band filter and the third band signal output from the third band filter are transferred to port 2 A coupling signal having a phase difference of 0 degrees is output through the terminal b, the received second band signal through the terminal c, and the received first band signal and the third band signal through the terminal d are 180 degrees out of phase. A first hybrid coupler for outputting a coupling signal having a;
The coupling signal output from the complex c of the first hybrid coupler is input through the terminal e, the coupling signal output from the complex d of the first hybrid coupler is input through the terminal f, and the input through the terminal e A second hybrid coupler that outputs a coupling signal having a phase difference of 0 degrees through a terminal g of the received coupling signal and outputs a coupling signal having a phase difference of 0 degrees through a terminal h of the coupling signal received through the terminal f ;
A first phase delay module for delaying the phase of the coupling signal output from only c of the first hybrid coupler and inputting it to the terminal e of the second hybrid coupler;
A second phase delay module for delaying the phase of the coupling signal output from only d of the second hybrid coupler and inputting it to the terminal f of the second hybrid coupler;
A phase adjustment selection control module for controlling to delay a phase of a corresponding coupling signal by selecting one of the first phase delay module or the second phase delay module using the phase inversion error compared by the phase comparison module;
A phase for measuring a phase inversion error for a phase difference of 0 degrees between the coupling signal output through the terminal g of the second hybrid coupler and the coupling signal output through the terminal h and feeding back to the phase adjustment selection control module Comparison feedback module;
A first antenna for receiving and radiating a coupling signal output from terminal g of the second hybrid coupler through port 3;
A signal combination transmission system of a service band for each communication service provider for a communication method without a guard band, including a second antenna that receives and radiates a coupling signal output from the terminal h of the second hybrid coupler through port 4.
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