KR980007124A - Wireless communication and distance measuring device using binary CDMA signal - Google Patents

Abstract

In the present invention, in order to prevent the complexity of the system and the manufacturing cost, the CDMA signal has a simple binary level in order to prevent the complexity of the system and the manufacturing cost. This relates to a possible system at the same time. In the CDMA communication, synchronization is essential, and instant retransmission function is given between target transceivers, and transmission delay time is measured and signal transmission speed is divided by half. Although the output signal has been simplified to binary, it has the advantages of eliminating interference between multiple users and multi-path interference of the original CDMA system, so it can be used in fields that cannot be used due to interference in general wireless devices. . In particular, since this method started from the change of the source structure of CDMA, it is expected that there will be no problem in technical disputes with foreign countries, so it will have a significant international competitiveness. Simultaneous measurement of distance means that when the number of reference stations is three or more, it is possible to identify the location at the same time as communication. Since this technology is applied to wireless, it can be used in high frequency frequencies as well as ultrasonic waves and light waves. In particular, when applied to ultrasonic waves, the transmission speed of sound waves can be made small by one chip length mm unit of the code used, so it is possible to make a device capable of very precise distance measurement and low-speed data communication without the need for a separate frequency usage permit. Application areas can be used for all locations where location or distance measurement and communication are needed simultaneously.However, considering the transmission wavelength, ultrasonic waves are used for loss and loss prevention systems that require low-speed data and short-range measurements. In a relatively wide range of automatic vehicle control and toll collection systems, light waves can be applied to applications such as 3D video shooting and animation, which are short-range but require broadband transmission and require position or distance measurement.

Description

Wireless communication and distance measuring device using binary CDMA signal

As this is a public information case, the full text was not included.

1 is a structural diagram of a transmitter module.

Claims (3)

As shown in FIG. 5, the transmitter of FIG. 1 is configured with the receiver of FIG. 2 using a structure that truncates the level of CDMA signals of several channels and converts them into binary signals to facilitate digital logic processing. A method of measuring distance with a transmission delay time difference between transmission and reception as shown in FIG. By applying the function of claim 1 to the ultrasonic wave, the relay station of FIG. 3 and the mobile station of FIG. It's about a lost, lost and lost system. By applying the function of claim 1 to a high-frequency radio frequency, the mobile station of FIG. 4 is constructed and a base station using the transmitter of FIG. 1 and the receiver of FIG. Find out the distance from more than one base station so that the mobile station knows its location, use automatic vehicle controls and listen to different announcements depending on where the mobile station stands in front of complex stores or exhibitions. System available at the same time.