KR100417114B1 - Apparatus and method to measure high frequency power - Google Patents

Abstract

The present invention relates to power measurement of high frequency signals, and more particularly, to an apparatus and method for measuring high frequency power for outputting high frequency signals such as IS-95 and 1X EV (Evolution) used in a mobile communication wireless environment. More specifically, the present invention relates to an apparatus and method for measuring power of a high frequency signal by detecting RMS power using a log detector or a root-mean-square voltage detector. will be. In order to solve this problem, an apparatus for measuring high frequency power according to the present invention includes: a detector for detecting a log or effective value voltage of a set high frequency signal and outputting a detected value; An analog / digital converter converting the value input from the detector into a digital value and outputting the digital value; A memory for storing a sampling frequency and a sampling frequency, and storing an effective power value of each sampling number; And converting a digital value input from the analog / digital converter into an effective power value and storing the converted digital power value in the memory. When the output of the detector is sampled by an effective power value for a set number of sampling times, the average power value of the total sampling times is calculated. A control unit for converting the output unit in logarithmic units or the effective value voltage unit; and outputs at least, the method for measuring the power of the high-frequency signal in a high-frequency power measuring apparatus using a log detector or the effective value voltage detector: a set sampling high frequency Converting the output of the log detector or rms voltage detector for the digital value into a digital value; A second step of converting and outputting the detector output converted into the digital value into an effective value power value; A third step of repeating the above steps by a set number of sampling times; A fourth step of calculating an average value of an average power value of all sampling times when sampling is completed by the set sampling number; And a fifth step of converting the calculated effective value power average value into the log unit or the effective voltage unit and outputting the converted average value.

Description

Apparatus and method for measuring high frequency power {APPARATUS AND METHOD TO MEASURE HIGH FREQUENCY POWER}

The present invention relates to power measurement of high frequency signals, and more particularly, to an apparatus and method for measuring high frequency power for outputting high frequency signals such as IS-95 and 1X EV (Evolution) used in a mobile communication wireless environment. More specifically, the present invention uses a log detector or a root-mean-square voltage detector (RMS voltage detector, hereinafter referred to as an rms voltage detector) to detect rms power to generate high frequency power. An apparatus and method for measuring the power of a signal.

An RMS power detector is a detector widely used for measuring high frequency power. However, due to problems such as dynamic range and cost, a log detector or an rms voltage detector is used. The problem is that the output values of the log detector and the rms voltage detector have a different scale than the rms power detector. That is, the use of the log detector and the rms voltage detector is not a problem in a signal that does not change over time, but in a signal having a peak value such as 2-tone or CDMA that varies over time, the log detector or the rms voltage Using a detector means that the output signal is shaken a lot. To reduce the shaking of the output signal, a low pass filter (LPF) is used. Even in this case, since the role of the low pass filter plays a role of obtaining an average, the use of such a log detector or an effective value voltage detector results in averaging the log or effective value voltages (Vrms). When it is detected by the effective value power detector, a large difference occurs with the average of the actual effective value power.

Accordingly, an object of the present invention relates to a high frequency power measuring apparatus and method for measuring the effective power of a high frequency signal using a log detector or an effective value voltage detector to have an advantage in dynamic range, cost, and the like.

Another object of the present invention relates to a high frequency power measurement apparatus and method that can reduce the phenomenon that the output signal is a lot of shaking even if the power of the high frequency signal is measured using a log detector or an effective voltage detector.

In order to solve the above object, a high frequency power measuring apparatus according to the first aspect of the present invention is:

A detector for detecting a log or effective value voltage of a set high frequency signal and outputting a detected value;

An analog / digital converter converting the value input from the detector into a digital value and outputting the digital value;

A memory for storing a sampling frequency and a sampling frequency, and storing an effective power value of each sampling number; And

Converts the digital value input from the analog / digital converter into an effective power value and stores it in the memory, and when the output of the detector is sampled by an effective power value for a set number of sampling times, the average power value of the total sampling times is calculated and the logarithm is calculated. And a controller for converting the output in units of units of the effective value or in units of the effective value voltage.

In addition, the control unit of the high frequency power measuring apparatus according to the second aspect of the present invention;

A sampling frequency setting unit which sets a sampling frequency according to a frequency characteristic of the high frequency signal;

A sampling count setting unit which sets a sampling count according to signal characteristics of the high frequency signal;

An analog / digital conversion input unit for receiving an output converted from the analog / digital converter into a digital value;

An effective value power conversion unit for converting the digital value received from the analog / digital conversion input unit back to an effective value power value;

An effective value power average value calculating unit that calculates an average value power average value by summing each effective value power value stored in the memory for the set sampling number and dividing by the sampling number;

A unit converter for converting the average value power average value obtained by the average value power average value calculating unit into a log unit or an effective voltage unit, and converting the converted unit value;

And an output unit for outputting an output value of the unit converted by the unit converter.

In addition, according to the third aspect of the present invention, a method of measuring the power of a high frequency signal in a high frequency power measuring apparatus using a log detector or an effective voltage detector is:

Converting an output of the log detector or the rms voltage detector for a set sampling high frequency into a digital value;

A second step of converting and outputting the detector output converted into the digital value into an effective value power value;

A third step of repeating the above steps by a set number of sampling times;

A fourth step of calculating an average value of an average power value of all sampling times when sampling is completed by the set sampling number;

And a fifth step of converting the calculated effective value power average value into the log unit or the effective voltage unit and outputting the converted average value.

Further, according to the fourth aspect of the present invention, the effective value power average value applied to the high frequency power measuring method is; And summing the respective effective value power values for the set sampling number and dividing by the sampling number to calculate the high frequency power.

In addition, according to the fifth aspect of the present invention, the high frequency signal applied to the high frequency power measuring method; IS-95, characterized by including a 1X EV signal.

1 is a block diagram of a high frequency power measurement apparatus according to an embodiment of the present invention,

2 is a block diagram of a high frequency power measurement apparatus according to another embodiment of the present invention;

3 is an internal block diagram of a control unit for calculating an average of RMS power according to an embodiment of the present invention and converting the average power into a required unit;

4 is a control flowchart for measuring high frequency power using the high frequency power measuring apparatus shown in FIGS. 1 to 3 according to a preferred embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

10: log detector 20: analog-to-digital converter

30: control unit 40: memory

110: effective voltage detector 120: analog-to-digital converter

130: control unit 140: memory

310: sampling frequency setting unit 320: sampling frequency setting unit

330: ADC conversion input unit 340: RMS power conversion unit

350: effective value power average value calculator

360: unit conversion unit 370: output unit

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First of all, in adding reference numerals to the components of each drawing, it should be noted that the same components have the same reference numerals as much as possible even if they are displayed on different drawings. Detailed descriptions of well-known functions and configurations that are determined to unnecessarily obscure the subject matter of the present invention will be omitted.

1 is a block diagram of a high frequency power measurement apparatus according to an embodiment of the present invention, Figure 2 is a block diagram of a high frequency power measurement apparatus according to another embodiment of the present invention. 3 is an internal block diagram of a control unit for calculating an average of RMS power according to an exemplary embodiment of the present invention and converting the average power to a required unit.

First, FIG. 1 is a block diagram of a high frequency power measurement apparatus according to an exemplary embodiment of the present invention, which includes a log detector 10, an analog digital converter (ADC) 20, A control unit (CPU: Central Processing Unit) 30 and a memory 40 are provided.

The log detector 10 detects a log value for a specific frequency (sampling frequency) of the high frequency signal and outputs the log value to the ADC 20.

The ADC 20 converts the analog log value output from the log detector 10 into a digital value and outputs the digital value.

The controller 30 converts the digital value input from the ADC 20 into an effective value Prms value and stores the converted value in the memory 40. The controller 30 is sampled by a preset sampling frequency, and the output of the log detector 10 converts a value digitally converted by the ADC 20 into an effective value power value and stores it in the memory 40. do. In addition, when the control unit 30 has stored the effective value in the memory 40 by the set number of sampling times, the controller 30 divides the sum of the effective value power values stored in the memory 40 by the number of times of sampling to obtain an average value of the effective value power. The controller 40 obtains the effective value power in this manner. On the other hand, the controller 30 converts the effective value power (effective value power average value) obtained in this way into a log unit and outputs it.

Next, as another embodiment of the present invention, an example using an effective voltage detector as a detector will be described with reference to FIG. 2.

2 is a block diagram of an apparatus for measuring high frequency power according to another exemplary embodiment of the present invention, an RMS voltage detector 110, an analog digital converter (ADC) 120, A control unit (CPU: Central Processing Unit) 130 and a memory (Memory) 140 are provided.

The rms voltage detector 110 detects an rms voltage Vrms value for a specific frequency (sampling frequency) of the high frequency signal and outputs it to the ADC 120.

The ADC 20 converts the analog Vrms value output from the RMS voltage detector 110 into a digital value and outputs the digital value.

The controller 130 converts the digital value input from the ADC 120 into an effective value Prms value and stores the converted value in the memory 140. The control unit 130 samples the predetermined number of sampling times, and converts the digital value converted from the ADC 120 by the output of the RMS voltage detector 110 into an RMS value to be stored in the memory 140. In addition, when the control unit 130 stores the effective value in the memory 140 for the set number of sampling times, the controller 130 divides the sum of the effective value power values stored in the memory 140 by the number of times of sampling to obtain an average value of the effective value power. The controller 140 calculates the effective value power in this manner. Meanwhile, the controller 130 converts the obtained effective power (average value of the average power) into units of RMS voltage (Vrms) and outputs the converted power.

The controller 30 or 130 illustrated in FIGS. 1 and 2 uses an internal configuration as shown in the example of FIG. 3 to obtain the RMS power Prms value with respect to the output of the log detector 10 or the RMS voltage detector 110. Achieve.

3 is an internal block diagram of a controller for calculating an average of RMS power (Prms) and converting it into a required unit according to an exemplary embodiment of the present invention. The sampling frequency setting unit 310 and the sampling frequency setting unit are shown. 320, an ADC conversion input unit 330, an effective value power conversion unit 340, an effective value average power calculation unit 350, a unit conversion unit 360, and an output unit 370.

The sampling frequency setting unit 310 sets a sampling frequency according to the frequency of the high frequency signal. The sampling frequency thus set is stored in the memory.

The sampling frequency setting unit 320 sets the sampling frequency according to the signal characteristics of the high frequency signal. The sampling frequency thus set is stored in the memory.

The ADC conversion input unit 330 receives an output converted into a digital value by the ADC (analog / digital converter).

The effective value power converter 340 converts the digital value received from the ADC conversion input unit 330 back to an effective power value Prms. The converted value is stored in the memory.

The effective value power average value calculation unit 350 calculates the effective value power average value by summing each effective value power value stored for the sampling number and dividing it by the sampling number.

The unit converter 360 converts the mean value power average value obtained by the mean value power average value calculator 350 to a corresponding unit (log unit or effective value voltage unit).

The output unit 370 outputs an output value of the unit converted by the unit converter 360.

1 to 3, the effective value power of the high frequency signal may be measured by using a log detector or an effective voltage detector having a different scale from the effective value power detector when measuring the high frequency signal, and using a log detector or an effective value voltage detector. Therefore, even if the power of the high frequency signal is measured, the average value of the effective power is obtained. Therefore, the phenomenon that the detector output of the high frequency signal having the peak value such as 2-tone and CDMA is greatly shaken can be reduced.

The power measuring method of the high frequency signal according to the present invention will be described in detail with reference to FIG. 1 to FIG.

4 is a control flowchart for measuring high frequency power using the high frequency power measuring apparatus shown in FIGS. 1 to 3 according to an exemplary embodiment of the present invention.

First, in step 401, the output of the high frequency signal is detected and applied to the ADCs 20 and 120 through the log detector 10 or the RMS voltage detector 110.

Thereafter, in step 403, the ADCs 20 and 120 convert the output of the log detector 10 or the effective voltage detector 110 into analog / digital conversion.

The analog / digital conversion value (digital value) of the converted detector output is applied to the controllers 30 and 130 in step 405.

The control unit 30 or 130 converts the value applied from the ADCs 20 and 120 into an effective value power Prms value in step 407.

The controllers 30 and 130 store the effective value power Prms value converted in step 409 in the memory 40 or 140.

The control unit 30 or 130 checks whether the current sampling number exceeds the preset sampling number in step 411. If the current sampling number exceeds the preset sampling number, the controller 30 or 130 proceeds to step 413. If the process returns to step 401 and subsequently repeats the process sequentially.

In step 413, the control unit 30 or 130 calculates an average value of the effective power value, and calculates an average value of the effective power value for the set number of samplings based on Equation 1 below.

Where Is the sum of the effective value powers of each number stored during the sampling number, and n is the sampling number.

The control unit 30 or 130 converts the effective value power average value Prms (average) calculated in step 413 into a log unit or an effective value voltage unit in step 415. The conversion of the rms mean value to a logarithmic unit or rms voltage unit uses a conventional mathematical method.

When the conversion of the effective value average value to the log unit or the effective value voltage unit is completed in step 415, the controllers 30 and 130 output in step 417.

On the other hand, in the detailed description of the present invention has been described with reference to specific embodiments, of course, various modifications are possible without departing from the scope of the invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined not only by the scope of the following claims, but also by the equivalents of the claims.

As described above, the present invention has an advantage in that RMS power can be detected using a log detector or an effective voltage detector having a wide dynamic range and low cost when detecting power of a high frequency signal.

In addition, even if the power of the high frequency signal is measured using a log detector or an effective voltage detector, the actual effective power average is calculated to detect the power of the high frequency signal. And even in the case of having a peak value, such as 1X EV signal there is an advantage that can reduce the phenomenon that the output signal of the detector much shake.

Claims (5)

In the high frequency power measurement device: A detector for detecting a log or effective value voltage of a set high frequency signal and outputting a detected value; An analog / digital converter converting the value input from the detector into a digital value and outputting the digital value; A memory for storing a sampling frequency and a sampling frequency, and storing an effective power value of each sampling number; And A sampling frequency setting unit for setting a sampling frequency according to the frequency characteristic of the high frequency signal, a sampling frequency setting unit for setting the sampling frequency according to the signal characteristic of the high frequency signal, and an output converted into a digital value by the analog / digital converter An analog / digital conversion input unit receiving an input, an effective value power conversion unit converting a digital value received from the analog / digital conversion input unit back to an effective value power value, and summing each effective value power value stored in the memory during the set sampling number. An average value power calculating unit that calculates an average value power average value by dividing by a sampling frequency, and a unit conversion unit and unit conversion unit converting the average value power average value obtained by the effective value power average value calculation unit into a log unit or an effective value voltage unit. Equivalent from High frequency electric power to the measuring device, characterized in that at least comprising; controller is configured as an output module for outputting the output value of the above. delete In a method of measuring the power of a high frequency signal in a high frequency power measurement device using a log detector or an effective voltage detector: Converting an output of the log detector or the rms voltage detector for a set sampling high frequency into a digital value; A second step of converting and outputting the detector output converted into the digital value into an effective value power value; A third step of repeating the above steps by a set number of sampling times; A fourth step of calculating the effective value power average value of the total number of sampling times by summing each effective value power value for the set number of sampling times and dividing by the number of sampling times when sampling is completed by the set number of sampling times; And converting the calculated effective value power average value into the log unit or the effective voltage unit and outputting the converted average value. delete The method of claim 4, wherein the high frequency signal; IS-95, high frequency power measurement method comprising a 1X EV signal.