KR102112855B1 - Apparatus and method for transmitting a signal using on-off keying scheme in a wireless communication system - Google Patents

Abstract

In the present specification, a transmission apparatus for transmitting a signal using an on-off keying modulation method in a wireless communication system, comprising: an RF module for transmitting and receiving a wireless signal; And a modulator functionally connected to the RF module, wherein the modulator is disposed on a first line through which a baseband signal is transmitted and a second line through which a carrier signal is transmitted. It comprises an inductor (inductor), the inductor disposed on each line is characterized in that connected to the parasitic capacitor (capacitor) of the transistor included in the modulator.

Description

Method and apparatus for transmitting a signal using an on-off keying method in a wireless communication system {APPARATUS AND METHOD FOR TRANSMITTING A SIGNAL USING ON-OFF KEYING SCHEME IN A WIRELESS COMMUNICATION SYSTEM}

The present specification relates to a transmitting device and a receiving device for transmitting a signal, and more particularly, to a transmitting device and a receiving device using an on-off keying modulator and a demodulator.

On-off keying (“OOK”) is a type of modulation method for displaying “digital” data by the presence or absence of “carrier,” and “amplitude shifting” is the simplest method among modulation.

That is, on-off modulation is the simplest modulation method, and the presence of a carrier transmitted at a certain time is represented by binary '1', and a lack of a carrier transmitted at a certain time (non-existent state) is represented by binary '0'.

There are also ways to change the length of on and off (eg Morse code) to add additional information in a more complex way.

On-off modulation is used to transmit the Morse code that transmits the “radio frequency” (see Continuous Waveform). This morse code does not use a basic digital demodulation circuit. Also, OOK is used to transmit / receive “ISM band” data between “computers”.

Since OOK greatly changes the amplitude of the carrier, the spectral efficiency is not good.

At low to medium speed transmission speed, it is possible to reduce the efficiency and the like by adjusting the rise and fall of the carrier amplitude. At high speed, a more efficient modulation method (eg, “frequency shift modulation”) is generally used.

That is, the existing on-off keying modulator and demodulator has a side in which switching loss increases and characteristics deteriorate toward high frequencies due to parasitic components of the transistor.

That is, in wireless communication requiring high data rates, the parasitic capacitance component of such transistors causes a slow response speed of the signal.

This is a factor that makes it difficult to implement a wireless communication system having a high data rate.

The purpose of this specification is to remove the parasitic capacitance component of the transistor by using a structure of a distributed inductor, thereby providing an on-off keying modulator and demodulator having a higher data rate than the conventional one.

The technical problems to be achieved in the present invention are not limited to the technical problems mentioned above, and other technical problems that are not mentioned will be clearly understood by those skilled in the art from the following description. Will be able to.

In the present specification, a transmission apparatus for transmitting a signal using an on-off keying modulation method in a wireless communication system, comprising: an RF module for transmitting and receiving a wireless signal; And a modulator functionally connected to the RF module, wherein the modulator is disposed on a first line through which a baseband signal is transmitted and a second line through which a carrier signal is transmitted. It comprises an inductor (inductor), the inductor disposed on each line is characterized in that connected to the parasitic capacitor (capacitor) of the transistor included in the modulator.

In addition, in this specification, the inductor disposed on the first line and the inductor disposed on the second line form an artificial transmission line with the parasitic capacitor, respectively.

In addition, in the present specification, the modulator is characterized in that it adjusts the time delay of the signal output through each of the formed artificial transmission lines in the same way.

In addition, in this specification, the modulator is characterized in that the on-off state of the transistor is determined according to the voltage value of the base signal.

In addition, in the present specification, a modulator for modulating a signal using an on-off keying modulation method in a wireless communication system, the modulator comprising: a first line through which a baseband signal is transmitted; A second line through which a carrier signal is transmitted; At least one transistor; And an inductor disposed on the first line and the second line, and the inductor disposed on each line is connected to a parasitic capacitor of the transistor.

In addition, in the present specification, a receiving device for receiving a signal using an on-off keying demodulation method in a wireless communication system, the RF device (radio frequency module) for transmitting and receiving a radio signal; And a demodulator functionally connected to the RF module, wherein the demodulator is disposed on a first line through which a baseband signal is transmitted and a second line through which a carrier signal is transmitted. It includes an inductor (inductor), the inductor disposed on each line is characterized in that connected to the parasitic capacitor (capacitor) of the transistor included in the demodulator.

In addition, in the present specification, a demodulator demodulating a signal using an on-off keying demodulation method in a wireless communication system, the demodulator comprising: a first line through which a baseband signal is transmitted; A second line through which a carrier signal is transmitted; At least one transistor; And an inductor disposed on the first line and the second line, and the inductor disposed on each line is connected to a parasitic capacitor of the transistor.

The present specification has an effect of having a fast response speed to a signal by removing components of parasitic capacitance and / or harmonic components of a transistor by using inductors distributed in each line.

Through this, the on-off keying modulator and demodulator proposed in this specification enable high-speed communication with a higher data rate.

In addition, through the inductor structure of the distributed arrangement proposed in the present specification, it is possible to implement an inter-chip communication system capable of communicating with only one chip in high-speed communication using CMOS.

It is expected to be used in various fields such as the Internet of Things and communication between electronic devices inside the car.

The effects obtainable in the present invention are not limited to the above-mentioned effects, and other effects not mentioned will be clearly understood by those skilled in the art from the following description. .

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are included as part of the detailed description to aid understanding of the present invention, provide embodiments of the present invention, and describe the technical features of the present invention together with the detailed description.
1 is a diagram showing an example of an on-off keying modulator proposed in the present specification.
2 is a diagram showing an example of an on-off keying demodulator proposed in the present specification.
3A is a diagram showing an example of a base signal, and FIG. 3B is a diagram showing an example of a carrier signal.
4 is a diagram illustrating an example of a base signal, a carrier signal, and a signal in which two signals are combined, which can be applied to a modulator and a demodulator proposed in the present specification, respectively.
5 shows a simple one-stage OOK modulator proposed in the present specification.
6 shows a simple type of OOK modulator proposed in this specification.
7A shows an example of a modulated signal input to the demodulator, and FIG. 7B shows an example of a signal output through the demodulator.
8 shows an example of the components of parasitic capacitance and the resulting signal distortion.
9 shows an example of a distributedly arranged inductor structure applicable to the modulator and demodulator proposed in the present specification.
10 is a block diagram of a wireless communication device according to an embodiment of the present invention.

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

The suffixes "modules" and "parts" for components used in the following description are simply given in consideration of the ease of writing this specification, and the "modules" and "parts" may be used interchangeably.

Meanwhile, the apparatus or device described in the present specification is a device capable of wireless communication, and may include a mobile phone including a smart phone, a tablet PC, a desktop computer, a laptop, a smart TV, and a TV including an IPTV.

Also, embodiments of the present invention will be described in detail with reference to the accompanying drawings and the contents described in the accompanying drawings, but the present invention is not limited or limited by the embodiments.

The terminology used in the present specification is a general terminology that is currently widely used while considering functions in the present invention, but this may vary according to the intention or custom of a person skilled in the art or the appearance of a new technology.

In addition, in certain cases, some terms are arbitrarily selected by the applicant, and in this case, their meaning will be described in the description of the applicable invention.

Therefore, it is intended to clarify that the terms used in the present specification are to be interpreted based on the actual meaning of the terms and the contents of the present specification, not simply the names of the terms.

Hereinafter, contents related to an on-off keying type modulator and a demodulator for providing a high data rate proposed in this specification without time delay will be described.

That is, the present invention is an on-off keying modulator for extracting a parasitic capacitance component and distributing an inductor to remove the parasitic capacitance component in order to solve the problem of a slow response speed caused by the parasitic capacitance component of the transistor, and It represents a demodulator.

That is, as shown in FIGS. 1 and 2, the inductor L / 2 for removing the effect of the parasitic capacitance component is distributedly disposed on a line through which a carrier signal and a baseband signal each pass. .

That is, the distributedly arranged inductor is combined with a capacitor inside the transistor to form an artificial transmission line.

That is, the modulators and demodulators of the inductor distributed arrangement structure of the present invention operate like an artificial transmission line for each of the base signal and the carrier signal, and have the same time delay to operate like a lossless transmission line.

Therefore, by using the structure of the inductor distributed in this manner, a signal can be output without distortion due to time delay.

1 is a diagram showing an example of an on-off keying modulator proposed in the present specification.

The modulator of FIG. 1 may be included in the transmission device of FIG. 10 to be described later.

The modulator may include the following configuration.

That is, the modulator is a first line through which a baseband signal is transmitted, a second line through which a carrier signal is transmitted, at least one transistor, and an inductor respectively disposed on the first line and the second line (inductor).

Here, the inductors disposed on each line are connected to the parasitic capacitor of the transistor.

In addition, the inductor disposed on the first line and the inductor disposed on the second line may form an artificial transmission line with the parasitic capacitor, respectively.

The on-off keying modulator shown in FIG. 1 determines the on-off state of the transistor according to the voltage value of the base signal, so that the amplitude of the carrier signal appears differently at the output stage.

If the gate voltage is on, the carrier signal is pulled out to the common terminal and the output stage has only a very small amplitude.

If the voltage of the gate is off, most of the signals move along the distributed line, and a carrier signal having an amplitude similar to that of the carrier signal input to the output terminal is output.

2 is a diagram showing an example of an on-off keying demodulator proposed in the present specification.

The demodulator of FIG. 2 may be included in the receiving device of FIG. 10 to be described later.

The demodulator may include the following configuration.

That is, the demodulator is a first line through which a baseband signal is transmitted, a second line through which a carrier signal is transmitted, at least one transistor, and an inductor disposed in each of the first line and the second line (inductor).

Here, an inductor disposed in each line may be connected to a parasitic capacitor of the transistor.

In addition, the inductor disposed on the first line and the inductor disposed on the second line may form an artificial transmission line with the parasitic capacitor, respectively.

The on-off keying demodulator proposed in this specification removes components of parasitic capacitance as well as harmonic components by using a distributed inductor structure.

Conventional demodulators have a time delay experienced by the signal due to the multi-stage structure, so that a harmonic component appears, but the on-off keying demodulator proposed in this specification is a harmonic effect caused by time delay by adjusting the delay of an artificial transmission line for each signal. Can be removed.

In summary, the on-off keying modulator and demodulator shown in FIGS. 1 and 2 implement a modulation and demodulation scheme in which the amplitude of the carrier signal varies according to the logic value of the base signal.

Here, the base signal and the carrier signal pass through the artificial transmission line formed by the parasitic capacitance of the distributedly arranged inductor and transistor (capacitance between the drain and source (Cds) and the capacitance between the gate and source (Cgs)).

The line through which the carrier signal passes is formed by an artificial transmission line by the capacitance between the distributed inductor (L / 2) and the drain-source, and the line through which the base signal passes is distributed by the distributed inductor (L / 2) and the gate-source An artificial transmission line is formed by the capacitance between them.

That is, according to the present invention, when the time delay occurring while passing through the respective artificial transmission lines is the same for the base signal and the carrier signal, the same result as without the time delay can be obtained.

This may be possible by obtaining the parasitic capacitance of the transistor, as previously discussed, and calculating the inductance value accordingly to form an artificial transmission line for each signal.

On the other hand, the size of the transistor used in the modulator and demodulator proposed in this specification is to minimize the parasitic capacitance component to reduce the size of the circuit.

In addition, the number of stages of the entire modulator is determined in consideration of insertion loss and isolation.

Therefore, the on-off keying modulator and demodulator proposed in this specification can speed up response time for higher data rates than conventional modulators and demodulators.

Here, the baseband signal is a signal including actual information, and may be represented by 0 or 1. 3A shows an example of a base signal, and FIG. 3B shows an example of a carrier signal.

In addition, the carrier signal (carrier signal) is a signal for loading and transmitting a base signal containing information, and refers to a high frequency signal having a much higher frequency than the base signal.

4 is a diagram illustrating an example of a base signal, a carrier signal, and a signal in which two signals are combined, which can be applied to a modulator and a demodulator proposed in the present specification, respectively.

5 shows an example of an on-off keying modulator proposed in the present specification, and shows the simplest one-stage OOK modulator.

In addition, FIG. 5 can be simply expressed as shown in FIG. 6 according to the voltage value of the base signal applied to the gate.

6 shows a simple type of OOK modulator proposed in this specification.

As shown in Figure 6a, when the gate (gate) is On, Vout is 0V (ideally), as shown in Figure 6b, when the gate is Off, Vout is the carrier signal (carrier signal) It appears as it is.

The base signal in FIG. 6 may use signals having 0 and 1 shown in FIG. 3A.

Next, the on-off keying demodulator shown in FIG. 2 will be described in more detail.

The on-off keying demodulator utilizes the output (modulated signal) from the on-off keying modulator as a differential structure.

That is, in FIG. 2, the phase difference between the modulated signal 1 and the modulated signal 2 is 180 degrees.

Similar to the operation in the modulator, Vout becomes 0V when the voltage of the gate is turned on, and Vdd voltage is output when the voltage of the gate is turned off.

Here, the modulated signal input to the demodulator (FIG. 7A) appears as the output of FIG. 7B through the demodulator.

Here, the signal output from the demodulator corresponds to a base signal containing information.

The advantages of the on-off keying demodulator proposed in this specification are briefly summarized.

First, there are on-off keying demodulators with numerous structures.

However, the conventional on-off keying demodulator has a disadvantage that the response speed is slow for high frequencies (high data rate, high-speed operation, etc.) due to the parasitic capacitance component of the transistor.

That is, the existing demodulator appears distorted as shown in FIG. 8A due to the slow response speed, because of the parasitic capacitance components Cgs and Cds of FIG. 8B.

Accordingly, as shown in FIGS. 1 and 2, by distributing the inductor on the line for each signal, that is, by forming an artificial wire line for each signal, the effect of parasitic capacitances (Cgs, Cgd) can be eliminated, resulting in fast response speed. Can be obtained.

That is, the on-off keying modulator and demodulator proposed in this specification can implement a high data rate by distributing the inductors in a line for each signal.

9 shows an example of a distributedly arranged inductor structure applicable to the modulator and demodulator proposed in the present specification.

The left part of FIG. 9 shows an artificial transmission line consisting of a salpin inductor and capacitance.

The signal passing through this artificial transmission line has a (LC) ^1/2 time delay.

That is, by arranging the inductor as shown in FIG. 9, the parasitic capacitances Cgd and Cgs and the inductor form an artificial transmission line, thereby removing the effect on the parasitic capacitance of the transistor.

At this time, the time delay of the artificial transmission line through which the carrier signal and the base signal pass respectively is equal, so that the signal can be provided without distortion (due to the time delay).

As described above, the content of removing the components of parasitic capacitance through the inductor structure of FIG. 9 can be applied to both on-off keying modulators and demodulators.

In particular, the on-off keying demodulator proposed in this specification can simultaneously remove not only the effect of parasitic capacitance but also the effect on harmonics.

General device to which the present invention can be applied

10 is a block diagram of a wireless communication device according to an embodiment of the present invention.

Referring to FIG. 10, a wireless communication system includes a transmitting device 1010 and a receiving device 1020.

The transmitting device 1010 includes a processor (processor, 1011), a memory (memory, 1012) and a communication module (communication module, 1013).

The processor 1011 implements the functions, structures, processes, and / or methods proposed in FIGS. 1 to 9 above. Layers of the wired / wireless interface protocol may be implemented by the processor 1011.

In particular, the processor may include an on-off keying modulator proposed herein or may be implemented to perform the function of an on-off keying modulator.

Alternatively, the on-off keying modulator may be implemented separately from the processor.

The memory 1012 is connected to the processor 1011, and stores various information for driving the processor 1011.

The communication module 1013 is connected to the processor 1011, and transmits and / or receives wired / wireless signals.

The communication module 1013 may include a radio frequency unit (RF) unit for transmitting / receiving radio signals.

The receiving device 1020 includes a processor 1021, a memory 1022, and a communication module (or RF unit) 1023.

The processor 1021 implements the functions, structures, processes, and / or methods proposed in FIGS. 1 to 9 above. The layers of the radio interface protocol may be implemented by the processor 1021.

In particular, the processor may include an on-off keying demodulator proposed in this specification or may be implemented to perform the function of an on-off keying demodulator.

Alternatively, the on-off keying demodulator may be implemented separately from the processor.

The memory 1022 is connected to the processor 1021, and stores various information for driving the processor 1021. The communication module 1023 is connected to the processor 1021, and transmits and / or receives radio signals.

The memories 1012 and 1022 may be inside or outside the processors 1011 and 1021, and may be connected to the processors 1011 and 1021 by various well-known means.

Also, the transmitting device 1010 and / or the receiving device 1020 may have a single antenna or multiple antennas.

The embodiments described above are those in which components and features of the present invention are combined in a predetermined form. Each component or feature should be considered optional unless stated otherwise. Each component or feature may be implemented in a form that is not combined with other components or features. It is also possible to constitute an embodiment of the invention by combining some components and / or features. The order of the operations described in the embodiments of the present invention can be changed. Some configurations or features of one embodiment may be included in other embodiments, or may be replaced with corresponding configurations or features of other embodiments. It is obvious that the claims may be combined with claims that do not have an explicit citation relationship in the claims, or may be included as new claims by amendment after filing.

Embodiments according to the present invention can be implemented by various means, for example, hardware, firmware, software, or a combination thereof. For implementation by hardware, one embodiment of the present invention includes one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), FPGAs ( field programmable gate arrays), processors, controllers, microcontrollers, microprocessors, and the like.

In the case of implementation by firmware or software, an embodiment of the present invention may be implemented in the form of a module, procedure, function, etc. that performs the functions or operations described above. The software code can be stored in memory and driven by a processor. The memory is located inside or outside the processor, and can exchange data with the processor by various means already known.

It will be apparent to those skilled in the art that the present invention may be embodied in other specific forms without departing from the essential features of the present invention. Therefore, the above detailed description should not be construed as limiting in all respects, but should be considered illustrative. The scope of the invention should be determined by rational interpretation of the appended claims, and all changes within the equivalent scope of the invention are included in the scope of the invention.

Although the description has been focused on examples of on-off keying modulation and demodulation of the present invention, it is possible to apply to various other methods.

1100: transmitting device
1120: receiving device

Claims (12)

In the transmission apparatus for transmitting a signal using an on-off keying (On-Off keying) modulation method in a wireless communication system,
An RF module for transmitting and receiving a radio signal (radio frequency module); And
A modulator functionally connected to the RF module, the modulator comprising:
And an inductor disposed on a first line through which a baseband signal is transmitted and a second line through which a carrier signal is transmitted, wherein the number of stages of the modulator is based on insertion loss and isolation. Depends on,
The inductors disposed in each line have the same inductance value, and are connected to a parasitic capacitor of a transistor included in the modulator,
When the transistor is turned on, the carrier signal flows to a common terminal, and in the turned off state, the carrier signal is moved along a distributed line. According to claim 1,
And an inductor disposed on the first line and an inductor disposed on the second line form an artificial transmission line with the parasitic capacitor, respectively. The method of claim 2, wherein the modulator,
A device characterized in that the time delay of the signal output through each of the formed artificial transmission lines is equally adjusted. According to claim 1,
The modulator is characterized in that the on-off state of the transistor is determined according to the voltage value of the base signal. In a modulator for modulating a signal using an on-off keying modulation method in a wireless communication system,
A first line through which a baseband signal is transmitted;
A second line through which a carrier signal is transmitted;
At least one transistor; And
And an inductor disposed on the first line and the second line, respectively, and the number of stages of the modulator is determined according to insertion loss and isolation,
The inductors have the same inductance value,
The inductors disposed in each line are connected to the parasitic capacitors of the transistors,
The modulator characterized in that the carrier signal flows to a common terminal when the transistor is turned on, and the carrier signal moves along a distributed line in the turned off state. The method of claim 5,
And an inductor disposed on the first line and an inductor disposed on the second line form an artificial transmission line with the parasitic capacitor, respectively. The method of claim 6,
A modulator characterized in that the time delay of the signal output through each of the formed artificial transmission lines is the same. The method of claim 5,
The on-off state of the transistor is determined according to the voltage value of the base signal. In a receiving apparatus for receiving a signal using an on-off keying (On-Off keying) demodulation method in a wireless communication system,
An RF module for transmitting and receiving a radio signal (radio frequency module); And
A demodulator functionally connected to the RF module, the demodulator comprises:
And an inductor disposed on a first line through which a baseband signal is transmitted and a second line through which a carrier signal is transmitted,
The number of stages of the demodulator is determined according to insertion loss and isolation,
The inductors disposed on each line have the same inductance value and are connected to a parasitic capacitor of a transistor included in the demodulator,
When the transistor is turned on, the carrier signal flows to a common terminal, and in the turned off state, the carrier signal is moved along a distributed line. The method of claim 9,
And an inductor disposed on the first line and an inductor disposed on the second line form an artificial transmission line with the parasitic capacitor, respectively. In a demodulator (demodulator) for demodulating a signal using an on-off keying (On-Off keying) demodulation method in a wireless communication system,
A first line through which a baseband signal is transmitted;
A second line through which a carrier signal is transmitted;
At least one transistor; And
And an inductor disposed on the first line and the second line, respectively.
The number of stages of the demodulator is determined according to insertion loss and isolation, and the inductors disposed in each line have the same inductance value, are connected to the parasitic capacitor of the transistor, and the transistor to which the parasitic capacitor is connected In the turn-on state, the carrier signal flows to a common terminal, and in the turn-off state, the carrier signal moves along a distributed line. The method of claim 11,
The inductor disposed in the first line and the inductor disposed in the second line form a demodulator, each of which forms an artificial transmission line with the parasitic capacitor.

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