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Power line communication modem

A modem and power line communication technology, applied in telephone communication, distribution line transmission systems, electrical components, etc., can solve the problems of reduced flexibility, reduced production efficiency, and longer development time of power line communication modems

Inactive Publication Date: 2005-01-19
LG ELECTRONICS (TIANJIN) APPLIANCES CO LTD
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0016] First of all, for the power line communication modem of the prior art, in order to convert the digital signal into an analog signal, a high-performance DA converter capable of outputting several point (dot) analog signals within 1 μs and a matching ASIC(13), and the development of such components will increase the production cost
[0017] Secondly, for the power line communication modem of the prior art, it is not easy to use ASIC (13) to change the decimal notation method (algorism) according to the form desired by the user, so this not only makes the development of the power line communication modem difficult Reduced flexibility and longer development time, resulting in lower productivity

Method used

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Embodiment Construction

[0029] The power line communication modem of the present invention will be described in detail below with reference to the accompanying drawings.

[0030] Such as figure 2 As shown, the power line modem of the present invention is composed of the following components: a digital signal processing unit (Digital Signal Processor: DSP) (101), which can output a rectangular wave signal in the form of a chirp (Chirp); a band filter (Band Pass Filter: BPF) (103), which can remove unnecessary components in the signal output by the above-mentioned digital signal processing unit (101), and only make the signal with a frequency within a certain interval pass; the amplifier (105), it The pulse signal that has passed through the filter (103) can be amplified so as to be suitable for power line communication.

[0031] Here, the above-mentioned digital signal processing part (101) is a direct circuit capable of processing digital signals from hardware (hardware), as shown in "C", it can pa...

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Abstract

The invention is a power line communication modulator-demodulator (Modem), and its characteristic: it is composed of a digital signal processing part, a filter and an amplifier; the digital signal processing part can output chirp-form rectangular wave signal; the filter can filter the unnecessary components in the output signal and only allows the signal in a certain frequency region to pass through; the amplifier can amplify the pulse signal of the filter and makes it suitable for the power line communication. The invention uses bandlike filter to eliminate the unnecessary frequency range in the above pulse signal from the software and only outputs the analog signal in the needed frequency range. Therefore, it can improve the practicality of the Modem, shorten time of development, and save the expenses.

Description

technical field [0001] The present invention relates to power line communication modems. Background technique [0002] In many areas of today's society, in order to give full play to the advantages of computers (Computer Power), PC systems have been widely used, including desktop computers (Desktop), floor standing computers (Floor Standing), portable computers (Portable Microcomputer) Wait. [0003] In addition, the communication of the corresponding PC system utilizes existing telephone lines or coaxial cables, optical cables and other dedicated lines to transmit signals. And in the corresponding PC system, in order to achieve the purpose of communication, it is also necessary to have a communication terminal device, such as a modem, etc., wherein the modem can process the frequency modulation or amplitude modulation of the signal transmitted through the telephone line or dedicated line. [0004] Here, the corresponding communication terminal device has two types: a buil...

Claims

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Application Information

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IPC IPC(8): H04B3/54H04M11/06
Inventor 金珠炫李军锡
Owner LG ELECTRONICS (TIANJIN) APPLIANCES CO LTD
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