KR101492418B1 - MCC signal decoding method by Time BIN revision - Google Patents

Abstract

A meaningful time bin area is extended to an adjacent idle time bin area within a range that does not affect the identification of the entire time slot, and the MCC signal decoding method in a Miles operating environment is disclosed. The present invention largely consists of a correction step of removing distortion of a received signal and finding a normal signal, and a post-correction decoding step of again decoding the data subjected to the correction method at a normal signal interval. In order to increase the decoding rate of the inputted signals, the interval of input signals is stored in the memories A, B, C, and D in a stepwise manner, and the signals generated in the 0,6,8,10 time bin adjacent section , It is regarded as an input due to optical signal distortion and corrected to a normal position. Thus, it is possible to filter a significant amount of distortion of the received laser signal, to obtain a decoding result strong against signal distortion, and to secure high decoding reliability.

Description

[0001] The present invention relates to a method and apparatus for decoding a Miles signal,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laser signal decoding method under a MILES (Multiple Integrated Laser Engagement System) operating environment, and more particularly, to a method for decoding a MIL (MILES Communication Code) signal input to a MILES receiver.

Multiple Integrated Laser Engagement System (MILES) is used to simulate the same battle effects and weapon performance as real combat, using a laser launcher as a sniper and a laser signal detector as a means of attacking. (Hereinafter referred to as "Miles").

Miles can send real-time digital information on the fighting situation and damage results, and all combatants can share it in real time, so it is possible to engage in realistic virtual combat. Therefore, Can be a useful tool.

Miles is the only simulated means of engagement in circumstances where it is impossible to launch a shotgun, but it can not accurately simulate the trajectory of a military bullet that would actually draw a gentle trajectory even if it were a direct firearm. In the case of a warrior firearm, There is also an unrealistic requirement to secure In addition, it is difficult to reflect the power of real bullets because the laser signals are easily blocked even in places that can not be covered, such as leaves and bushes. Of course, it is a serious disadvantage that explosion damage due to close-up landing is neglected, such as being effective shot, if it is precisely within a narrow detection range (sensing strip, sensing helmet, etc.).

We have been actively improving the range to satisfy the prescribed signal system by reflecting more information on the recent Miles signal and limiting the characteristic of the ammunition and the fragmentation effect of the ammunition of the ammunition in spite of being the direct aiming method by the laser ought.

Korean Registered Patent No. 10-0527337, a system and method for simulated warfare Korean Registered Patent No. 10-1285064 When using a mileage equipment, Korean Patent No. 10-1301350 discloses a mile-based system capable of controlling the laser sniper hit recognition function and the number of laser firing based on a wireless communication system

The decoder of the Miles signal converts the optical signal received through the laser sensor into an electric signal, receives it in time order, compares it with a code defined in the standard, and decodes the received data. However, the decoding method depending on the previously promised time clock period usually causes a lot of errors when receiving a distorted signal due to unstable reception and reflection of the optical signal.

Usually, optical signal distortion occurs frequently when transmitting ordinary spectrally shaped ordinary optical signals (not lasers) through optical fibers. Often occurs mainly in certain bends of the fiber, and its typical distortion is signal spread spectrum or signal delay.

This is an uncommon phenomenon even in the case of laser light passing through the air. It is considered that when the air as the optical transmission medium is assumed to be a kind of optical fiber, the difference in the density of sand wind or air in the engaging region, A delay may occur.

In addition, the small spreading phenomenon of the pulsed laser beam with low output power can cause a large number of signal lights overlapping each other or oblique incidence of the signal light in the remote shooting.

Particularly, when only a few pulses in a laser signal (pulse assembly) corresponding to a decoding length of one unit, that is, one decoding depth (= 1 time slot) are lost in a clock delay or a signal, even if the remaining pulses are normally received, The decoded values of the signals may be different from each other, thereby causing the decoding of the entire contents of reception to fail or generating an erroneous value.

An object of the present invention is to provide a decoding method that is robust against signal distortion, which is designed to solve the above problems in a Miles laser transmission / reception environment, which is a relatively harsh environment in laser light communication.

A key technical feature of the present invention to achieve the above object is that a specific time bin (time bin allocation) region is ignored in the MCC protocol in the idle bin section in the Miles implementation environment. That is, in the present invention, it is essential that the meaningful time bin area is expanded to the adjacent idle time bin area within a range that does not affect the identification of the entire time slot. This allows a significant amount of distortion of the received laser signal to be filtered out.

The present invention largely consists of a correction step of removing distortion of a received signal and finding a normal signal, and a post-correction decoding step of again decoding the data subjected to the correction method at a normal signal interval.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features and advantages of the present invention will be more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG.

The present invention corrects the time interval between signals in the MCC system of Miles and judges the input signal, so that it is possible to obtain a decoding result strong against the signal distortion.

Also, in the process of judging the input signal by correcting the time interval, the step value is stored in the memory and the normal establishment condition is determined and the decoding is performed, thereby securing a high decoding reliability, and as a result, the decoding efficiency under the Miles environment can be greatly increased .

1 is a perspective view showing an MCC receiver (a shot detector) having a laser light-sensitive section incorporated therein;
2 is a diagram illustrating the structure of the MCC Word
3 is a diagram illustrating the structure of the MCC message
FIG. 4 is a diagram illustrating a photo-captured signal of an actually received MCC message
5A is a table showing Basic MILES Code structure as a part of the MILES Code table
5B is a table showing Standard MILES Player ID (SPID) Code assignments as part of the MILES Code table
5C is a table showing the MCC code PID / AMMO type partition as a part of the MILES Code table
6 is a conceptual diagram schematically showing an MCC signal decoding method of the present invention in an easy-to-understand manner.
7 is a flowchart sequentially showing decoding steps of an MCC signal of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features and advantages of the present invention will be more apparent from the following description taken in conjunction with the accompanying drawings, in which: FIG.

It is to be understood, however, that the components described in the following detailed description in certain terminology and their combinations are not intended to limit the scope of the inventive concepts encompassed by the present invention.

First, a method of processing an overall Miles signal and a transmission / reception structure thereof will be described in order to help understand the present invention.

When a sniper aimed at the target and pulled the trigger of the firearm, the blanks were fired. The sound or light generated at this time was detected by an acoustic sensor or a light sensor, which is an internal device of the Miles transmitter, and the infrared laser diode From there, a pulsed infrared laser is launched to the aimed target.

A pulse type infrared laser is an optical signal transmitted through a laser output in a transmitter, and transmits 0 and 1 values of data with the presence or absence of an optical signal (On / Off).

If the laser fired from the sniper catches some of the sensing elements of the shooter (which may be a helmet of the soldier and a torso of the soldier, or a plurality of sensing elements provided on a sensing device mounted outside the target such as a train) The laser signal incident on the struck sensing element is converted to an electrical signal and then transmitted to a signal processing processor built in the sensing module.

Figure 1 illustrates a typical MCC receiver used in Miles training. In the signal sensor of FIG. 1, a laser signal detection sensor, that is, a light-sensitive part is formed at the center, and a signal processing processor and a communication module are embedded under the sensor.

The signal processor interprets the signal according to a predetermined protocol (MCC code convention), and if the signal is recognized as a shot signal, it displays visually and audibly whether the shot is hit by a soldier or a weapon mounted on the weapon. At the same time, You can stop the operation of the laser launcher, which is the means of the Miles sniper.

At the same time, a signal is sent to the central control center informing that it has been hit by the communication module built in the sensing device of the attacker, so that the central control unit can integrate the overall snip and hit results and control the engagement situation.

The simulator used in simulated warfare has a firearm characteristic such as the same range, range of coverage, triggering and shooting procedure, launch delay time, and the like of prototype such as K-201 grenade launcher as well as direct firearm such as K2, So that it can be detached and adhered without being damaged. In other words, only the laser beam is fired and the firing laser beam is regarded as being hit when it is detected by the target detector. Therefore, various information such as the type of firearm, the ID of the launcher (PID), and the bullet must be inserted in the laser beam used instead of the bullet.

To this end, the Miles communication code is used. MILES Communication Code (MCC), which is used as a transmission signal in MILES, is defined by MCC97 (PMT 90-S002B), the standard code for the Miles communication code structure in the United States.

FIG. 2 is a diagram illustrating the MCC word using the MCC format, which is a basic structure of the Miles communication code.

Referring to FIG. 2, the Miles code consists of 11 bits, including 6 bits with a logic "1" and 5 bits with a logic "0 ", each code having a single bit pattern. And 16 time binaries (BIN) sampled again are inserted into 11 time slots or time slots between each bit of these Miles codes. The sampling frequency of the 16 BINs is 48 kHz, which is 16 times the tile slot period of 3 kHz. Therefore, the sampling time between BINs is 20.8 msec.

Each Miles code includes 176 sampled BINs equally positioned between the 11 base bits.

In other words, the MCC Word consists of 11 time slots, each time slot consisting of 16 time bins.

FIG. 3 shows an MCC Message composed of the above-mentioned MCC Word. That is, the MCC message is composed of a set of MCC words. Referring to the drawings, a hit and a near miss can be sequentially transmitted according to time, according to types of firearms such as a neutralizer and a curing machine.

4 is a photoelectric conversion signal of an actually received MCC message. The photoelectric conversion signal composed of consecutive MCC words can be converted into a binary value and interpreted as an MCC message.

It is possible to define 0,1 value of the data by the presence or absence of the voltage of the optical signal transmitted through the laser output in the transmitter.

Referring to FIG. 3, the identifier of the first 3-bit pattern is " 110 " in order to identify the Miles code to the sensor receiving the Miles code. And the bits of the Miles code are synchronized in time to the leading edge of the first bit of this identifier and the leading edge of two consecutive Miles of code occurs with a period of about 333 [mu] sec (3 kHz). Thus, the time interval of one complete Miles code is 3.667 msec, or 366.7 μsec. The time shown in Fig. 3 is 367.179 [mu] sec, and the actual time error hardly occurs.

The information such as the types of weapons and types of seeds, the range of exposure and PID are transmitted by laser beam on the basis of the communication signal, word and message system as above, and the detector which receives the information transmits the result of simulation to decipher the Miles code to recognize the damage. .

According to the Miles Code standard protocol, laser light pulses appear only at 0, 6, 8, and 10 BIN of these sampled BINs to include the Player Identification (PID) of the simulated trainer. That is, it uses 4 time bin (0,6,8,10th time bin) out of 16 time bin.

Specifically, the MCC Word displays information on the player ID and weapon type, and uses six time bins for weapons. For the player ID, 4 time bin is used. Here, in the case of the weapon type, only time bin 0 is used, and the player ID uses the position of time bin 6,8,10.

5A to 5C illustrate a Miles code table allocated according to the above MCC system. FIG. 5A shows an example of a part of the Basic MILES Code structure table, and FIG. 5B shows an example of a part of the Standard MILES Player ID (SPID) Code assignments table. And FIG. 5C shows an example of a part of the MCC code PID / AMMO type partition table.

In FIG. 5B, only 47 player IDs are shown on the ground. However, referring to FIG. 5C, up to 330 (blue team 165, enemy group 165) can be assigned to one weapon code for each weapon type.

FIG. 6 is a conceptual diagram illustrating a method of decoding an MCC signal of the present invention.

For example, if the input signal is between time bin 15 of the previous time slot and time bin 1 of the current time slot, the position of the signal is corrected based on the time bin 0 signal of the current time slot. In this way, time bin 5 and 7.5 are compensated with a signal of time bin 6, and between time bin 7.5 and 9.5, time bin 8, time bin 9.5 and 10 are compensated with a signal of time bin 10. This allows time bin 0 to have a very wide signal acknowledgment (time margin) and time bin 6, 8, 10 to have a fairly stable signal power range. In rare cases, there will be two signals coming into this range. That is, a laser of a completely different code, for example, a laser signal for estimating and guiding an actual guided weapon. However, in the exhibition situation, it is not possible to create a training MILES mocage battleground in the vicinity of the actual engagement area. The present invention has been made in view of such a special situation, and it can be said that the present invention can not be invented or realized under normal commercial environment such as bar code analysis, mobile communication terminal operation, and the like in which a correct time slot is required.

As will be described later with reference to FIG. 7, the decoding start of the unit decoding section of the present invention starts with a signal input to the receiver. That is, the timer starts to operate based on the initial signal, and the interval of the input signals is stored in the memory A at this time. In storing the interval between signals, in order to increase the decoding rate, the interval of the input signal is corrected and stored by the time bin position principle of FIG. 6 described above. That is, in the case of a signal generated in the 0,6,8,10 time bin adjacent section defined in the specification, it is regarded as an input due to the optical signal distortion and is corrected to a normal position.

7 is a processing flowchart of the MCC signal decoding method of the present invention shown in Fig. 7 in which the concept of signal distortion correction shown in Fig. 6 is effectively executed.

Before looking at each step in FIG. 7, we will look at memories A, B, C, and D that act as temporary reservoirs for each stage.

For reference, Timer that measures time bin is used for MCC reception. The Timer operates on the basis of the original input signal and is initialized based on 16 time bin.

There are four types of memories used for MCC reception, 10 slots for memory A, and 11 slots for memory B and C, respectively. The memory D is composed of four slots. The four types of memory are initialized at the start of decoding and initialized when decoding is complete.

The execution steps of the present invention will be sequentially described based on the memory storing and deleting mechanism as described above.

Since the value stored in the memory A must be the interval between the signals, the input data obtained by converting the optical signal received by the laser sensor into the electrical signal is interrupted (temporarily intercepted), corrected and stored in the memory A.

At this time, the initial input signal stores 0 in the first slot of the memory A, and then stores the interval in the slots 1 to 10 of the memory A in order.

The interval of the input signal is sequentially stored in the above manner, and when the number of the input data reaches 10, the decoding of the input data starts.

In other words, the minimum requirement of the MCC Word, namely, the initial interval (the purple stopper in FIG. 2), the voltage On in the time slot 0, the next voltage Off interval, again in the time slot 6, Off again, Off, again in the time slot 10, Off again, and the later interval (the brown stopper in FIG. 2). Thus, ten input data must be stored.

If the number of input data is not 10, the signal is interrupted.

In this manner, the input data decoding is first determined to be a valid MCC, and if valid, decoding of data proceeds.

In decoding, the data stored in the memory A is processed and separated into two types. In the case of the data stored in the memory A, since the interval between the signals is stored in units of time bin, the remainder obtained by dividing the data by 16 corresponds to the time bin position of the corresponding data, and the quotient means the time slot of the corresponding data.

Using this feature, the memory B determines the slot position of the memory B as a quotient for the value of the remaining 0 when dividing the value of the memory A by 16, and records 1 in the corresponding slot. In the memory C, when the memory A is divided by 16 and the remainder is not 0, the slot position of the memory C is determined by the quotient value, and 1 is written in the corresponding slot. In the memory D, the remaining values of the memory C are sequentially written.

By performing the above process, the concept of FIG. 6 can be naturally implemented. In other words, the input signals other than 0, 6, 8, and 10 can be said to be unique in that they do not exist under the milestone environment.

The corresponding slot values of memories B and C stored by the above formula means each time slot of MCC Word. These results are in a form that is easy to compare with Figs. 5A and 5B.

The validity of the received data is determined by determining that the sum of the numbers in the memory B is 6, by using a code indicating the type of the weapon constituting the MCC Word as being composed of only six signals at time bin 0. That is, when the sum of the numbers existing in the memory B is not 6 and it is judged that the number of data located in the time bin 0 is not 6, it is determined that the data is not valid and the input data is again waited.

When the first validity of the data is determined, the value stored in the memory B is compared with the value of FIG. 5A to determine the type of weapon of the input signal. If the result is determined to be a normal value, the decoding is continued. Otherwise, the input signal is waited for again.

The result of the memory C can be decoded by comparing the SPID of the user with that of FIG. 5B.

If the value of 6 is stored in the first and second slots of the memory D, the value of the memory D is determined to be 1, otherwise it is determined to be 0, and the Y code of the user is decoded. If 10 is stored, it is determined as 1, otherwise it is determined that the Z code of the user is decoded. With this result, the end user ID can be decoded in comparison with the HEXA-DECIMAL YZ code PREFIX in FIG. 5C.

If there is no input for more than a certain time based on the timer, it is judged as the end of the MCC signal, and the timer is initialized and enters the sleep state.

The technical features of the present invention have been described step by step. It should be understood by those skilled in the art that the present invention may be embodied in many other specific forms without departing from the spirit or essential characteristics thereof. Which is also included in the technical scope of the present invention, which is expressed in the following claims.

Claims (3)

A method of decoding a Miles signal that operates on the basis of an initial input signal and receives an MCC signal according to a time bin using a Timer initialized on the basis of 16 time bin,
Storing the interval of the input signal in the memory A having 10 slots as input data;
When the number of the input data is 10, the value of the memory A is stored in the memory D composed of the memory B, C and the four slots composed of eleven slots,
Determining a slot position of the memory B as a value of a quotient and storing 1 in the corresponding slot when the value of the memory A is divided by 16 in the memory B,
Dividing the memory A in the memory C by 16 and storing the rest of the memory C as non-zero, determining a position of the memory C slot as a quotient value and writing 1 in the corresponding slot;
And recording the remaining value of the memory C in the memory D in order. The method according to claim 1,
Recording the remaining value of the memory C in the memory D in order; Afterwards
Determining whether the sum of the numbers in the memory B is 6 or not, and if not, waiting for the input data again. 3. The method of claim 2,
After the sum of the numbers in the memory B is determined to be 6,
Comparing the value of the memory B with the value of the Basic MILES Code structure to determine the type of the weapon;
Decoding the SPID by comparing the value of the memory C with the value of the Standard MILES Player ID (SPID) Code assignments; And
If 6 is stored in the first and second slots of the memory D, it is determined to be 1; otherwise, the Y code of the user is decoded. If 10 is stored in the third and fourth slots of the memory D Decode the Z code of the user based on the result, and compare the result with the HEXA-DECIMAL YZ code PREFIX of the MCC code PID / AMMO type partition to decode the end user ID. A method for decoding an included Miles signal.

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