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Method for selecting adaptive frequency baseband of walsh codes, adaptive frequency-selective spreader using the same and transmitting and receiving apparatus using the adaptive frequency-selective spreader

A technology of frequency selectivity and receiving equipment, which is applied in the direction of multiplexing code application, code division multiplexing system, multiple use of transmission path, etc., can solve the problem of stable sending and receiving data and low efficiency, and achieve low power and The effect of stabilizing human body communication, obtaining processing gain, and avoiding strong interference

Inactive Publication Date: 2011-04-13
ELECTRONICS & TELECOMM RES INST
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Problems solved by technology

[0004] However, the human body communication method has drawbacks in terms of low power consumption, since most communication systems require analog transmitter and receiver terminals such as digital-to-analog converters, analog-to-digital converters, etc. to use limited frequency bands
[0005] Also, the human body communication method has a drawback in that it is inefficient in stably transmitting and receiving data due to the channel characteristics of the human body and the surrounding noise environment

Method used

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  • Method for selecting adaptive frequency baseband of walsh codes, adaptive frequency-selective spreader using the same and transmitting and receiving apparatus using the adaptive frequency-selective spreader
  • Method for selecting adaptive frequency baseband of walsh codes, adaptive frequency-selective spreader using the same and transmitting and receiving apparatus using the adaptive frequency-selective spreader
  • Method for selecting adaptive frequency baseband of walsh codes, adaptive frequency-selective spreader using the same and transmitting and receiving apparatus using the adaptive frequency-selective spreader

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Embodiment Construction

[0036] Hereinafter, exemplary embodiments of the present invention, which can be easily put into practice by those of ordinary skill in the art to which the present invention pertains, will now be described in detail with reference to the accompanying drawings. However, in describing the operation of the exemplary embodiments in detail, when it is considered that a detailed description of a related well-known function or construction may unnecessarily obscure key points of the invention, the detailed description thereof will be omitted.

[0037] Also, in the drawings, the same reference numerals are used throughout to designate the same or similar components.

[0038] According to an exemplary embodiment of the present invention, a method for adaptively selecting the frequency baseband of a Walsh code according to channel characteristics and noise environment, an adaptive frequency selective extender using the method, and using the adaptive frequency The transmitting and recei...

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Abstract

There is provided a human body communication method and system using a frequency-selective baseband in order to transmit and receive data between communication devices that are coupled to a human body by using the human body as a communication channel. The human body communication method and system may be useful to maximize an efficiency of the frequency-selective spreading technology to enhance a processing gain of the Walsh code technology, and thus to reduce the interference between human bodies of users by adaptively selecting a frequency band of Walsh codes that are used for data communications according to the human body channel characteristics and the noise environments that are varied according to the ambient environments, and also construct a low-power and stable human body communication when there is a strong interference induced from other electronic equipments.

Description

technical field [0001] The present invention relates to an adaptive frequency-selective spreader (spreader) using a frequency-selective baseband in a communication system using a human body as a medium, and a transmitting and receiving device using the spreader, and more particularly, to a Method of selecting adaptive frequency band of Walsh (Walsh) code from limited frequency band according to channel characteristics and noise environment, adaptive frequency selective spreader using the method, and transmission and reception using the adaptive frequency selective spreader Apparatus wherein the adaptive frequency band of the Walsh code is used for data communication, and the limited frequency band excludes the frequency band from DC to 5 MHz in which the noise power around the human body is more concentrated in other frequency bands, but includes the frequency band in which the The signal transmitted from the human body has a frequency band of higher intensity than the signal ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B13/00H04L5/00
CPCH04J13/0048H04J13/18H04J13/0003H04B1/7136
Inventor 姜泰旭林寅基姜盛元朴炯一邢昌熙黄正焕金真庆金整范金圣恩金景洙朴基赫沈载勋
Owner ELECTRONICS & TELECOMM RES INST
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