KR101090012B1 - Method for judging quality of audio signal of communication module - Google Patents

Abstract

The present invention relates to a signal determination method of the communication module,

A selection step (S10) of selecting a signal type of a communication module corresponding to the measurement target device to be passed; A sampling step (S20) of sampling a signal of the communication module at a preset sampling period for each signal type selected; And determining whether the sampled sampling signal is a signal having a high level higher than a preset normal voltage level, and determining whether the sampled sampling signal is good or not with respect to the signal of the communication module (S30).

Communication module, signal integrity determination, signal type,

Description

Signal Determination Method of Communication Module {METHOD FOR JUDGING QUALITY OF AUDIO SIGNAL OF COMMUNICATION MODULE}

The present invention relates to a method for determining whether a signal is applicable to a communication module, and more particularly, to a method for determining whether a signal is valid or not in a communication module, which can more efficiently and simply perform a signal determination on a signal.

In general, in order to perform a digital audio test of an audio wireless portable device, an indirect measurement using an audio codec or a method of directly measuring using an audio measuring device capable of sufficiently sampling a digital audio signal may be used.

In the interference measuring method, an audio test signal is transmitted as an RF signal and signal processed by a communication module (DUT), which is a measurement target device, converted into a digital audio signal, and then converted into an analog signal through an audio codec. The analog signal is transmitted to a general purpose instrument and tested.

The direct measurement method is a method of transmitting an audio test signal as an RF signal and performing signal processing on a communication module, which is a measurement target device, to test the output digital audio signal with a measurement device dedicated to digital audio.

By the way, the interference measurement method of the conventional signal measurement method of the communication module has a problem that the accuracy is inferior, and the direct measurement method has a problem that the measurement cost increases because it uses a dedicated measurement equipment.

SUMMARY OF THE INVENTION The present invention has been proposed to solve the above problems of the prior art, and an object thereof is to provide a method for determining whether a signal is valid or not in a communication module, which can more efficiently and simply perform a signal acceptance decision on a signal. have.

A first technical aspect of the present invention for achieving the above object of the present invention, the selection step of selecting a signal type of the communication module corresponding to the measurement target device to determine whether or not; A sampling step of sampling a signal of the communication module at a preset sampling period for each signal type selected; And determining whether the sampled sampling signal is a signal of a high level higher than a preset normal voltage level, and determining whether the sampled sampling signal is a signal for the communication module.

The communication module is a wireless communication module for outputting a digital audio signal, and the measurement target signal is a digital audio signal.

The selecting step may include selecting one of a signal type of the communication module having a 50% duty and a signal type having a duty of 50% or less.

In the determination step, in the case of a signal type having a 50% duty, the predetermined signal period T (t), the sampling period T (s), and the sampling frequency N (s) during one sampling period are described below. Using the equation, T (t) < T (s) and (T (s)% T (t) * N (s)) > T (t) / 2, the signal of the communication module It is characterized by determining whether or not for.

In the determining step S30, when the signal type has a duty of 50% or less, the predetermined signal period T (t), the sampling period T (s), and the number of samplings during one sampling period ( N (s)) and the measurement time (TH) using the following equation, [Equation] T (t) <T (s) and (T (s)% T (t) * N (s) )> T (t) / 2 and (T (s)% T (t)) <TH, it is characterized by determining whether the signal of the communication module.

According to the present invention as described above, in the communication module, it is possible to more efficiently and simply perform the determination of the acceptance of the signal, thereby reducing the cost.

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

The present invention is not limited to the embodiments described, and the embodiments of the present invention are used to assist in understanding the technical spirit of the present invention. In the drawings referred to in the present invention, components having substantially the same configuration and function will use the same reference numerals.

1 is a block diagram of an apparatus for determining whether a signal is valid in a communication module for carrying out the present invention.

Referring to FIG. 1, an apparatus for determining whether a signal is in a communication module for performing the present invention includes a communication module 10 for outputting a digital audio signal, an input unit 21 for receiving a signal from the communication module 10, and It includes a measuring device 20 for measuring the quality of the signal received through the input unit 21.

2 is a flowchart showing a signal acceptance determination method of the communication module according to the present invention. 1 and 2, in the method for determining whether a signal is valid in the communication module according to the present invention, a selection step in which the measuring device 20 selects a signal type of the communication module 10 corresponding to the measurement target device to be determined as successful (S10), a sampling step (S20) of sampling the signal of the communication module at a predetermined sampling period for each signal type selected, and whether the sampled sampling signal is a high level signal higher than a predetermined normal voltage level. The determination may include a determination step (S30) for determining whether the signal of the communication module.

The communication module 10 may be a wireless communication module that outputs a digital audio signal, and the measurement target signal may be a digital audio signal.

In this case, the wireless communication module may be a WLAN module, a Zigbee module, or a Bluetooth module.

The digital audio signal may include a main clock signal having a duty of 50% or less, a synchronous clock signal having a duty of 50%, and a pulse code modulation (PCM) signal.

At this time, the selection step (S10), the signal type of the communication module may select one of the signal type having a 50% duty and the signal type having a duty of 50% or less.

3 is a diagram illustrating a signal type having a 50% duty according to the present invention.

Referring to FIG. 3, in the case of a signal type having a 50% duty, the determining step S30 may include a predetermined signal period T (t), a sampling period T (s), and one sampling period. Equation using the number of sampling (N (s)) of

[Equation]

T (t) <T (s) and (T (s)% T (t) * N (s))> T (t) / 2

By using, it is possible to determine whether the signal of the communication module.

4 is an exemplary diagram of a signal type having a duty of 50% or less according to the present invention.

Referring to FIG. 4, in the case of the signal type having a duty of 50% or less, the determining step S30 includes a predetermined signal period T (t), a sampling period T (s), and one sampling. Equation using the number of samplings (N (s)) and measurement time (TH) during the cycle

[Equation]

T (t) <T (s) and (T (s)% T (t) * N (s))> T (t) / 2 and (T (s)% T (t)) <TH

It can be determined whether the signal for the communication module using the.

Hereinafter, the operation and effects of the present invention will be described in detail with reference to the accompanying drawings.

Referring to Figs. 1 to 4, the signal acceptance determination method of the communication module of the present invention will be described. In Figs. 1 and 2, in the selection step (S10) of the signal acceptance determination method of the communication module of the present invention, the measuring apparatus ( 20 selects the signal type of the communication module 10 corresponding to the measurement target device to determine whether or not to provide the selected signal type information to the sampling step (S20).

In this case, the communication module 10 may be a wireless communication module that outputs a digital audio signal, and the measurement target signal may be a digital audio signal.

Here, the wireless communication module may be a WLAN module, a Zigbee module, or a Bluetooth module.

For example, when the communication module is a wireless LAN, the digital audio signal includes a main clock signal MAIN CLK having a duty of 50% or less, a synchronization clock signal Sync CLK having a duty of 50%, and actual quantized audio. It may consist of a signal or a pulse code modulation (PCM) signal containing the coding value of this audio signal.

Accordingly, in the selecting step S10, one of the signal type of the communication module having a 50% duty and the signal type having a duty of 50% or less may be selected.

Next, in the sampling step (S20), the signal of the communication module 10 is sampled at a sampling period preset for the signal type selected in the selection step (S10), and the sampled sampling signal is determined in the determination step (S30). to provide.

In the determining step (S30), it is determined whether the sampled sampling signal is a signal of a high level higher than a predetermined normal voltage level, and determines whether the signal of the communication module is good.

Here, the determining step (S30) can determine whether the quality of the signal of the communication module 10 by distinguishing the signal type having a 50% duty and the signal type having a duty of 50% or less.

Referring to FIG. 3, in the case of a signal type having a 50% duty, the determining step S30 may include a predetermined signal period T (t), a sampling period T (s), and one sampling period. By using the number of sampling (N (s)) of can be determined whether the signal for the communication module as shown in Equation 1 below.

[Equation 1]

T (t) <T (s) and (T (s)% T (t) * N (s))> T (t) / 2)

For example, if the predetermined signal period T (t) is 1 second, the sampling period T (s) is 1.3 seconds, and the sampling frequency N (s) is 2, the equation [1] of [1] is [1]. The quality of the signal is satisfactory because it satisfies the condition of T (t) < T (s)] and also satisfies [T (s)% T (t) * N (s))> T (t) / 2]. Can be determined.

Referring to FIG. 4, in the case of the signal type having a duty of 50% or less, the determining step S30 includes a predetermined signal period T (t), a sampling period T (s), and a sampling frequency ( N (s)) and the measurement time (TH) can determine whether the signal for the communication module as shown in Equation 2 below.

[Equation 2]

T (t) <T (s) and (T (s)% T (t) * N (s))> T (t) / 2 and (T (s)% T (t)) <TH)

For example, if the predetermined signal period T (t) is 1 second, the sampling period T (s) is 1.3 seconds, the sampling frequency N (s) is 2, and TH is 0.4 seconds, Satisfies the condition of [T (t) <T (s)] of Equation 1, and also satisfies [T (s)% T (t) * N (s))> T (t) / 2], Further, since [T (s)% T (t)) <TH is satisfied, it can be determined that the quality of the signal is good.

In the present invention as described above, in a communication module such as a wireless LAN, it is possible to more efficiently and simply perform the quality transfer determination on the digital audio signal, thereby reducing the cost.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a block diagram of a signal acceptance determination apparatus of a communication module for carrying out the present invention.

2 is a flowchart showing a signal acceptance determination method of a communication module according to the present invention.

Figure 3 illustrates a signal type having a 50% duty in accordance with the present invention.

Figure 4 is an exemplary signal type having a duty of less than 50% in accordance with the present invention.

Explanation of symbols on the main parts of the drawings

10: communication module

20: measuring device

Claims (5)

A selection step of selecting a signal type of a communication module corresponding to the measurement target device to be passed or not; A sampling step of sampling a signal of the communication module at a preset sampling period for each signal type selected; And A determination step of determining whether the sampled sampling signal is a signal of a high level higher than a predetermined normal voltage level, and determining whether the sampled sampling signal is a signal of the communication module; Signal acceptance determination method of the communication module comprising a. The method of claim 1, wherein the communication module, It is a wireless communication module that outputs a digital audio signal, And the measurement target signal is a digital audio signal. The method of claim 2, wherein the selecting step, And determining one of a signal type having a 50% duty and a signal type having a duty of 50% or less. The method of claim 3, wherein the determining step, In the case of a signal type having a 50% duty, a predetermined signal period T (t), a sampling period T (s), and a sampling frequency N (s) during one sampling period are used by using the following equation. , T (t) <T (s) and (T (s)% T (t) * N (s))> T (t) / 2 Determining whether the signal is valid for the communication module. The method of claim 3, wherein the determining step, In the case of a signal type having a duty of 50% or less, the predetermined signal period T (t), the sampling period T (s), the sampling frequency N (s) during one sampling period, and the measurement time Using (TH) using the following equation, T (t) <T (s) and (T (s)% T (t) * N (s))> T (t) / 2 and (T (s)% T (t)) < TH Determining whether the signal is valid for the communication module.

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