JPS6054536A - Transmitting-receiving system - Google Patents

Abstract

PURPOSE:To easily receive different information of each area, by transmitting the same carrier frequency from an antenna after the frequency is divided into plural narrow areas and the divided ones are modulated by different signals, and moving one set of receiver while the receiver receives the transmitted information. CONSTITUTION:Carriers of the same frequency are transmitted to a limited narrow area from antennas 5, 9... of plural carrier oscillating circuits 2, 6... by controlling a synchronization signal generating circuit 1. Each carrier oscillating circuit 2, 6,... modulates 3 and 7 by means of the signal of devices 4 and 8 which respectively send out different signals. When one set of receiver turned to the transmitted carrier is moved while the receiver receives the carrier, different information of each narrow area can easily be received successively. Where radio waves from two antennas overlap, the phase of the radio waves are made opposite to each other so as to narrow the interference area. When the transmission antenna is installed along a road, transmission of traffic information becomes easier.

Description

[Detailed Description of the Invention] Technical Field of the Invention The present invention uses one carrier wave frequency to transmit information modulated by several oscillating transmitters and antennas to a specific area. This invention relates to a transmission/reception method that provides all information to a person or vehicle with a receiver that passes through an electric field.

Problems with the Prior Art Conventionally, the transmitting/receiving δ method for providing information to a specific area has been widely used, but its method of use is to transmit all radio waves to a specific area and A method was used to transmit information to residents, vehicles, etc. who had receivers within the service area, which was an electric field area. However, if the above-mentioned 1ζ system and intermediary information provision system are located in adjacent areas, if the carrier frequency of the radio waves used is an approximate value,
Conventionally, the carrier wave frequency is changed, and the receiver 1111 is tuned to receive the information by changing the carrier wave frequency a to receive the information. 'ff: A selective reception method was used. However, changing the frequency of the carrier wave for each adjacent area in order to spread information money has a great advantage for the receiver/receiver in that they can select the information content. There is the inconvenience of synchronizing and capturing information, especially when information is provided in each narrow area, and the receiver receives different information one after another while moving through the narrow area. The conventional transmitting/receiving method has the disadvantage that it is impossible to take actions based on the information.

Purpose of the Invention In view of the above-mentioned drawbacks, the present invention has been designed to prevent people, vehicles, etc. from being affected by events at shopping centers that are far away, conditions at drive-ins, etc., congestion on roads in the direction of travel, etc. Guide service provides all transmission and reception methods that can be used to judge the situation.

The structure of the invention and the purpose of the invention are to transmit radio waves in each narrow area, transmit information signals by modulation, and receive the information signals by tuning the receiver side.
The information signal is amplified and detected by the haterodyne method.
! A transmitting/receiving device that detects the signal and listens to it through headphones or speakers, and a transmitting device that can transmit radio waves in each narrow area as described above,
This is achieved by supplying a synchronizing signal to each of the oscillators to synchronize them so that they are received by the receiving device. In the area where the transmitted carrier waves overlap between the narrow areas in the above configuration, the two radio waves are synchronized, so T wave interference is greatly improved compared to the conventional system. If phase control is performed so that the carrier waves are out of phase, the radio wave energy will be attenuated in the area where the carrier waves overlap, and the interference area will be small. The effect of the disturbance is small, and if a cut-off circuit is installed in the receiver only in the event of a disturbance, it is possible to remove the sound by passing through a short boundary region. It is possible for the irJ to receive field strength area information.

Embodiments of the Invention Below, the present invention will be described in detail with reference to the drawings. Figure t+41 is a block diagram of the transmitting device of the present invention, 1 is a synchronizing signal generation circuit, 2 and 6 are <48 times of transmitted light 1 omitted, 3 and 7 are The modulator and phase controller, 4 and 8, are information signal transmitting devices. There are two types of information signals: those that are transmitted repeatedly and those that change over time. By using such a recording and reproducing device capable of transmitting all information as the information signal transmitting devices 4 and 8 in FIG. and 9 to the respective installed antennas.

FIG. 2 is an explanatory diagram of an information transmission method using the transmission/reception system of the present invention. In the figure, 10 indicates a road, and 11 indicates a road center line. 12 and 14 are parking lots, 13 and 15 are stores such as shopping centers and drive-ins, and 16 is an antenna (hereinafter referred to as ANT) ANT, which indicates a narrow receivable electric field area emitted from A. 17 is ANT, B
This figure shows the receivable narrow area of the electric field that can be transmitted by the user. Below, 18 shows the area of ANT, C, and 19 show the areas of ANT and D, respectively. 20.21.22 indicated by a broken line is ANT.

This shows the overlapping parts of the electric field areas emitted from A, B, C%, and D. As can be seen from the figure, 20 is ANT.
, indicates that this is an interference area between the information receiving area transmitted from A and the information receiving area transmitted from ANT, B. The same applies to 21.22 below. To explain one example of the operation of the transmission/reception method in the reception area as described above, the first
The information signal transmitting device 4 shown in the figure sends information about shopping center entertainment and the road in the direction of arrow It repeatedly broadcasts information such as traffic conditions and today's weather. Similarly, the information signal transmitting device 8 of FIG.
In Figure 2, AN'I' and B will repeatedly broadcast the road conditions inside the shopping center entertainment house and in the direction of O○ to people with receivers or vehicle widths on roads such as AN'I' and B. Similarly below, Moe 14
) I+ only shows the output up to two ANTs, but if you want to use multiple pKts, send the synchronization signal to the ANT as described above.

Broadcast information on C, ANT, and D. This information βk can be received by a known heterodyne system (i device).
In the area 20 where the electric field area 17 of NT, B, etc. coincides with each other, an interference occurs due to the M-coincidence of both electric fields.

What is the carrier wave in Figure 3a when the biventricular area is sufficiently added?
This is the second non-modulated waveform for explanation purposes. FIG. 31(b) shows a case where the carrier waves overlap, and the phases of the modulators 3 and 70 shown in FIG. 1 are controlled so that the carrier waves have opposite phases in this area. By the above-mentioned means, as shown in FIG. 3(c), due to the attenuation of radio wave energy in the electric field region, the disturbance area is reduced to 17' in FIG.
The narrow JS/N is greatly improved only in the overlapping area of 16' and 16'. FIG. 3(d) shows the modulation waveform for reference.

As mentioned above, the transmitting and receiving method of the present invention is the same for each narrow area.
Multiple transmitters and ANT transmit M wave number radio waves.

Each modulated with a different information signal is broadcast and received,
i: Believers can take action while moving through electric field areas using receivers tuned to the same frequency while sequentially receiving different new information f for each area, so their actions can be changed in advance based on their judgment of the situation. Therefore, it has the characteristics of smoothing the flow of people, vehicles, etc., and preventing the occurrence of traffic congestion and confusion.

[Brief explanation of drawings]

FIG. 1 is a system diagram of the transmitting device of the present invention, FIG. 2 is an explanatory diagram of the transmitting and receiving area used in the transmitting and receiving system of the present invention, and FIG.
) to (d) are modulation waveforms used to explain the present invention. 1 in the diagram...Synchronization signal generation circuit

Claims (1)

[Claims] 1. Using the same carrier frequency, a synchronizing signal is supplied to a plurality of installed transmitting devices to synchronize them, and the output of the plurality of installed transmitting devices is modulated with different information signals depending on the antenna. Then, 9. is transmitted to a narrow area, and vehicles passing through the electric field area of the plurality of places can sequentially receive information for each narrow area using a receiving device tuned to the same frequency. A transmission and reception method with all the features. 2 By fully controlling the phase of the output of the transmitting device, the phase of the carrier waves in the area where the radio waves are in a storm is made to be in the opposite phase, so that the radio wave energy in the area is completely attenuated and the reception is impaired. 46 transmission/reception system according to claim 1, which reduces the scope of the present invention.