JPS58182932A - Inspection system of quality of transmission line - Google Patents

Abstract

PURPOSE:To allow a radio equipment to confirm the quality of a transmission line by itself witout using any special measuring instrument, by providing a code generator for generating a specific code on a transmission side and a discriminating circuit for the code on a reception side. CONSTITUTION:When the quality of the transmission line is checked, the code generator 1 of a transmission-side radio equipment 10 transmits such a code that the number of ''1''s in any N-bit part of the code is N-1/2. A reception-side radio equipment 10' makes discrimination of the code by majority through a majority discrimination circuit 4', and by the output and the output of the number of ''1'' which is N-1/2 or more or less of the discriminating circuit, the output of said discriminating circuit which decides on the occurrence of a code error and the output of an error detcting part 7' are sent to an error display part 8' to display an error when it occurs. When the quality of the transmission line is checked in the opposite direction, the radio equipment 10' is regarded as the transmission side and the radio equipment 10 is regarded as the reception side; and the inspection is carried out similarly.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Technical Field of the Invention The present invention relates to data transmission radio equipment, and it is possible to improve the transmission path between opposing radio equipment by adding a simple function to a mobile radio equipment installed on a 4IK aircraft. This invention relates to a transmission line quality inspection method that allows quality confirmation.

(b) Conventional technology and problems Conventional wireless devices for data transmission only send and receive data, and in order to check the quality of the transmission path of the oncoming radio equipment, vA) A separate device such as a vehicle-side meter is required. The disadvantage is that it requires preparation and is time-consuming. In the case of a mobile radio device mounted on an aircraft, there are other disadvantages in that mounting an A rate measuring device on the aircraft requires a large amount of space and increases weight.

(e) Purpose of the Invention The purpose of the present invention is to eliminate the above-mentioned drawbacks by adding a simple function to a data transmission radio, thereby making it possible to easily check the quality of the transmission path between opposing radios. KToru provides road quality confirmation method.

(d) Structure of the invention In order to achieve the above object, the present invention
Take the bit! It has a code generator whose occurrence is N-, and the receiving side has an N-bit majority decision circuit and a decision circuit whether the number of %1# among the N bits is greater than or equal to N-1/2, and the majority decision Embodiment of the invention characterized in that the presence or absence of a code error in the transmission path is determined based on the output of the determination circuit and the output of the determination circuit.Hereinafter, one embodiment of the present invention will be described with reference to the drawings. do. 1st
The figure is a block diagram of a data transmission radio device according to an embodiment of the present invention, and FIG. 2 is a block diagram of a sign superiority determination circuit on the receiving side when using a 5-bit majority decision rectangular circuit according to an embodiment of the present invention.
Figure 3 is a time chart of the waveforms of each part in the case of Figure 2, and asb+c, d, and e are &+ b+ in Figure 2.
C+ (corresponds to 1 @ 6 points, if the prisoner is normal,
■) If an error occurs at 111 → %01, (O is 10#
→%1# indicates the case of error or occurrence.

In the figure, 1.1' is a code generator, 2.2' is a transmission data processing section, 4.4' is a majority decision circuit, 5.5' is a reception data processing section, 6.6' is a receiving section, and 7. 7-71 is %1#
number judgment circuit and error detection unit, S, S', S'Fi error p
Display section, 9.9' is antenna, 10.10' is radio,
11 is a 5-bit majority Saiguchi route, 12 is a knot circuit, 1
3 is an AND circuit, 14 is an integrator, 15 is a comparator, 16 is a multi-by-pass brake (hereinafter referred to as MB),
17 is a display, swl, swx', swz, 5w2-5
w3. swa' indicates a switch.

FIG. 1 shows a state in which the quality of the transmission path is to be evaluated, with the radio device 10 in the transmitting state and the radio device 10' in the receiving state.

For normal data transmission, connect switch SWI to the dotted line side on the transmitting side (radio device 10), and connect switch SW3' to the dotted line side on the receiving side (et@(radio device 10')).
The received data is then processed by the data processing unit 2 and transmitted via the data processing unit 2 and the antenna 9.
(Receive via antenna 9' and receiver 6',
The received data processing unit 5' processes the received data and sends it as original data to the next stage device. Of course, the radio 10' is no MA+ on the transmitting side! If 10 is on the receiving side, switch SW2. SW
2' is connected to the dotted line side pressure and data is transmitted using the same operation as above.

When checking the quality of the transmission line, check the inorganic device (4.1) on the transmission side.
In FIG. 1, switch SW1. of the radio device 10). Connect SW2 to the actual edge side, and connect the receiving side radio device (radio device 10 in Figure 1).
') switch swz; Connect SW3' to the solid line side,
[code generator instead of data] υ, the occurrence of 11# is N-f for any N bits, and on the receiving side, the code processed by the received data processing unit 5' is converted to N A bit majority decision circuit 4' makes a majority decision, and the presence or absence of a code error is determined based on its output and the output of the decision circuit which determines whether the number of %1' in N bits is greater than or equal to N-1.
The output of the circuit for determining the number of ``1'' and the error detection 87' is sent to the error indicator 8', and if there is an error, it is displayed. You can see how much error occurs in the code depending on the transmission path, and you can see whether the transmission path can be used.If you want to check the quality of the transmission path in the opposite direction, send the radio 10' (I@Toji, radio 10 Assuming (?!-), switch SWI, 'SW2: SW2
．． All you have to do is connect SW3 to the point 41iI@.

Radio equipment for data transmission generally has means for covering up some errors caused by the transmission path, so the quality inspection of the transmission path does not need to be so strict.

Next, we will explain how to determine the presence or absence of code -9 using Figure M2 and Figure 3! explain. In this case code generator 1 or 1'
Assume that the occurrence of -11 in any 5 bits generates a code of 2 as shown in normal (5) of & in FIG. When this 5-bit code is sent, the output of the integrator 14 will be -1)/2N in the case of N bits, and therefore 0.4 in the case of 5 bits.

This value of 0.4 is set as the reference value of the comparator 15,
When a value of 0.4 or more is received from the first integrator, 11# is outputted, and when a value less than 0.4 is received, 0 is outputted. Now, in the case of 5 bits of prisoner f-g in Fig. 3a, the output of the integrator 14 is 0.4 in a normal case, but as shown in CB), it is <11
If # is wrong as %O'', it is 0.2 (as shown in O, if 10' is wrong as -1'', it is 0.6, and f
Looking at the case of the next 5 bits of -g, the output of the integrator 14 is always 0.
In the case of (4), it becomes O, O, 0, 2, 0, 2, 0, 2, and in the case of (0, it becomes 0.6.0.6.0.4.0.4.
It becomes 0.4.

Therefore, as shown in C, the output of the comparator 15 is always %1' when normal, and 10.1'% Q, #
% o,'%0. "%O" (11. if 0)
#%1,9%VIVKamel".

On the other hand, as shown in d, the output of the 5-bit majority decision circuit 11 is always %0# in the normal case, and I O, in the case of (6).
"O, Hao,"o,"o' and υ, (%L in the case of O
#IL#1Q, # * Q, HaO". Therefore, the output of the NOT circuit 12 is always 1 as shown in C when it is normal.
11 and )) is %1. 1. 11M%1. ”1
“, (for C'l, 10.#%CLI@L#
IL#%1'. Therefore, under normal conditions, the output of the AND circuit 13 is always q! Then, if there is one such as (6) or (Qa, e, As shown in The output of 13 will be %0#.

When this output is added to the Peng stable MB16, the output becomes 10', so the monostable MB16 generates a pulse of %1'' for a predetermined period and displays it on the display -17.-Stable MB16
The reason why 9 is used is that if the output period of the %QI of the AND circuit 13 is short, the display on the display 17 will be difficult to display, so a slightly longer pulse is generated to make the display easier to read.

As described above, when a code error occurs, the occurrence can be seen on the display 17.

As explained above, the code generator 1.1' and the number determination circuit of %1# and the correction detection section 7.7. '7'' and the error display portions 8, 8, and '8'' can be realized using known small circuits, so even if they are carried in a radio, they do not take up much space and are often heavy.

(f) Effects of the Invention As explained in detail above, according to the present invention, the quality of the transmission path can be checked with the radio device itself without using a special measuring device, which saves time and effort. In the case of mobile radio equipment and the like, the advantage is that it does not take up much space and does not add much weight.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a data transmission radio device according to an embodiment of the present invention, and FIG. 2 is a code error correction circuit on the receiving side when using a 5-bit majority decision circuit according to an embodiment of the present invention. FIG. 3 is a time chart of waveforms of various parts in the case of FIG. 2. In the figure, 1.1' is a symbol generator, 2.2' is a transmission data processing section, 4.4' is a majority decision N decision circuit, 5.5' is a reception data processing section, 6.6' is a reception section, 7,7. '7 "is turtle 1" number judgment circuit and error detection unit, 8,8;'8
' is the error indication part, 9.9' is the 7y tena, and 10.10' is Mm+1! + 11 u 5 h y ) majority decision circuit, 12 is a NOT circuit, 13 is a Fi AND circuit, 14 is a component 6*+15 is a comparator, 16 is a monostable multivibrator, 17 is a tj indicator, SWI. SWl,' SW2. SW2. ' SW3. SW3'd
Show yfk. 3rd α b (f Cd e /
/, -------o -o ----------O-0
0---------

Claims (1)

[Claims] In data transmission radio equipment, the transmitting side has a code generator such that the occurrence of %1N is N-IA no matter which N bits are taken, and the receiving side has an N-bit majority decision circuit and the number of N-bit Middle East 1#. has a judgment circuit that is N−1 or more but less than
A transmission line quality inspection method characterized in that the presence or absence of a code error in a transmission line is determined based on the output of the majority decision circuit and the output of the kernel judgment circuit.