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Low frequency communication system and method limiting distance

A communication system and communication method technology, applied in the field of low-frequency communication systems, can solve problems such as complex circuit control, high cost, and short distance

Active Publication Date: 2016-06-01
WUHAN RUINAJIE ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Embodiments of the present invention provide a low-frequency communication system and method with limited distance, aiming to solve the problem of using baseband signals for transmission in the prior art, the energy attenuation of transmission is fast, the distance is relatively short, and for multiple different transmission rates, the need To generate alternating magnetic field signals of different frequencies, the circuit control is more complicated and the cost is higher

Method used

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  • Low frequency communication system and method limiting distance
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  • Low frequency communication system and method limiting distance

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Embodiment 1

[0048]figure 1 A specific structural block diagram of the distance-limited low-frequency communication system provided by Embodiment 1 of the present invention is shown. For convenience of description, only parts related to the embodiment of the present invention are shown. In this embodiment, the distance-limited low-frequency communication system includes: a communication sending device 1 and a communication receiving device 2, wherein the communication sending device 1 includes a transmitting coil, and the communication receiving device 2 includes a receiving antenna.

[0049] Wherein, the communication sending device 1 includes:

[0050] The encoding unit 11 is configured to perform differential Manchester encoding on the data to be transmitted to obtain the current signal waveform to be transmitted;

[0051] Among them, the communication sending device first performs differential Manchester coding on the data to be sent, and the coding waveform is as follows: figure 2 s...

Embodiment 2

[0079] Figure 5 It shows the implementation process of the low-frequency communication method of the communication sending device provided by Embodiment 2 of the present invention, and the details are as follows:

[0080] It is worth noting that the distance-limited low-frequency communication system includes a communication sending device and a communication receiving device, wherein the communication sending device includes a transmitting coil, and the communication receiving device includes a receiving antenna.

[0081] In step S501, the communication sending device performs differential Manchester encoding on the data to be sent to obtain a waveform of a current signal to be sent.

[0082] In this embodiment, the communication sending device first performs differential Manchester coding on the data to be sent, and the coding waveform is as follows figure 2 shown. There is a jump in the middle of each bit of Manchester encoding, jumping from low to high means 0, jumping...

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Abstract

The present invention is applicable to the field of near field communication technologies, and provides a low frequency communication system and method limiting a distance. The system includes a communication transmit apparatus and a communication receive apparatus. The communication transmit apparatus includes a transmit coil. The communication receive apparatus includes a receive antenna. The communication transmit apparatus includes a coding unit, a modulation unit and a power amplification unit. The communication receive apparatus includes a filter unit, an amplification unit and a decoding unit. The system has a simple circuit structure, is convenient and flexible to configure, and has good adaptability and practicability. The energy transmitted by the system attenuates slowly.

Description

technical field [0001] The invention belongs to the technical field of short-distance communication, and in particular relates to a low-frequency communication system and method with limited distance. Background technique [0002] Mobile phone radio frequency identification (Radio Frequency Identification, RFID) technology builds RFID chips into mobile phones or mobile phone smart cards to realize the integration of mobile phone functions and RFID functions. Many proximity mobile payment applications. At present, mainstream mobile phone RFID solutions can be divided into two categories according to the working frequency, namely 13.56MHz scheme and 2.4GHz scheme. Among them, the 2.4GHz-based RFID-SIM integrates radio frequency technology into the SIM card and packages it into a SIM card. , RFID-SIM not only supports standard SIM card functions, but also can complete short-range wireless communication. It is a typical representative of the combination of smart card technology...

Claims

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Application Information

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IPC IPC(8): H04B5/00
CPCH04B5/24
Inventor 陈毅成龚明杨张明宇
Owner WUHAN RUINAJIE ELECTRONICS TECH