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Ultrasonic human body internal communication method and device based on grouping index modulation

A technology of index modulation and communication method, applied in ultrasonic/sonic/infrasonic transmission system, sustainable communication technology, advanced technology, etc., can solve the problems of adjacent pulse interference, bit error, not suitable for human communication

Active Publication Date: 2020-02-11
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, applying index modulation directly to the slot index is not suitable for human body communication
Due to the serious multipath effect in the human body, when multiple pulses are sent in one transmission frame, adjacent pulses will cause serious interference, resulting in serious bit errors

Method used

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  • Ultrasonic human body internal communication method and device based on grouping index modulation
  • Ultrasonic human body internal communication method and device based on grouping index modulation
  • Ultrasonic human body internal communication method and device based on grouping index modulation

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Embodiment 1

[0078] This embodiment discloses an ultrasonic communication method in the human body based on group index modulation, such as figure 1 As shown, the steps are as follows:

[0079] S1. On the sending node, perform serial / parallel conversion on the serial information, and divide it into multiple information blocks, each information block includes Y modulation bits and M index bits. In this embodiment, every 5 bits is an information block, wherein the first 3 bits are modulation bits, and the last 2 bits are index bits.

[0080] In this embodiment, the sending node may be, for example, a medical device implanted in a human body, or a wearable sensing device. The sending node is located in a wireless communication network using the human body as a transmission medium, and the number of sending nodes can be set to one or more. The wireless communication network also has a receiving node. The receiving node can be, for example, a medical device implanted in the human body, or a w...

Embodiment 2

[0137] This embodiment discloses an ultrasonic communication device in the human body based on group index modulation, such as image 3 As shown, it includes: a transmitter module and a receiver module. The transmitter module is wirelessly connected to the receiver module through the human body. The transmitter module and the receiver module can be medical devices implanted in the human body, or wearable sensing devices. .

[0138] Wherein, the sending end module includes a first converter, a packet module, an index modulator, a digital modulator, a second converter and a first communication module:

[0139] The first converter is used to perform serial / parallel conversion on the serial information, divide it into a plurality of information blocks, and transmit the information blocks in parallel to the index modulator and the digital modulator, wherein each information block includes Y modulation bits and M index bits.

[0140] The grouping module is used to divide each send...

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Abstract

The invention discloses an ultrasonic human body internal communication method and device based on grouping index modulation, and the method comprises the steps: carrying out the partitioning of serial information on a transmitting node, wherein each information block comprises a modulation bit and an index bit; dividing each sending frame into a plurality of groups; carrying out index modulationon the groups of each sending frame, and determining activation group serial numbers corresponding to the groups according to index bits; digitally modulating the modulation bit of each information block, and mapping the digitally modulated modulation bit to an activation group corresponding to the activation group serial number; sequentially carrying out parallel / serial conversion, pulse formingand ultrasonic conversion on the plurality of information blocks subjected to parallel processing to obtain a transmission signal, and transmitting the transmission signal in a human body through a sending frame; and receiving a transmission signal transmitted by a human body on the receiving node, and demodulating the transmission signal to obtain an index bit and a modulation bit. According to the invention, the human body multipath effect can be effectively overcome, and high-speed and energy-saving ultrasonic human body communication is realized.

Description

technical field [0001] The invention relates to the technical fields of physical layer modulation, human body communication and ultrasonic wireless communication, in particular to an ultrasonic intra-human communication method and device based on packet index modulation. Background technique [0002] In recent years, with the advancement of medical technology, the miniaturization of medical equipment, and the development of individualized medical needs, human body communication research has made remarkable progress. Human body communication research plays an important role in mobile medical care and health monitoring, and implantable human body communication is an important part of human body communication. However, the existing radio frequency communication technology has a high absorption rate in human body communication, and long-term radiation hazards are great; the sending node and receiving node of capacitively coupled human body communication need to form a ground loo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B14/02H04B13/00H04B11/00
CPCH04B14/02H04B14/023H04B13/005H04B11/00Y02D30/70H04L25/03834H04L25/061H04L5/0078H04L27/00H04L5/0003
Inventor 官权升王倩倩
Owner SOUTH CHINA UNIV OF TECH
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