KR960020193A - Power Line Communication Method by High Frequency Carriage of Pseudo Random Code - Google Patents

Abstract

1. Fields to which the invention described in the claims belong

The present invention relates to a data communication method using a power line in a home, and more particularly, to a method for providing reliable data communication at a marketable price.

2. The technical problem to be solved by the invention

It is an object of the present invention to eliminate the drawbacks of the prior art and to provide a power line communication method at a transmission speed that is noise-resistant and practical with a simple circuit configuration.

3. Summary of Solution to Invention

A part that converts transmission information into a pseudo noise code, a part that generates a frequency string (hereinafter referred to as MFSK) in which the pulse width and polarity of the pseudo noise code are allocated to a plurality of frequencies according to the transmission characteristics of the power line, and the MFSK is connected to the power line. RADOM consists of a transmitter consisting of a transmitting part, a frequency counter measuring the frequency of the MFSK, a part demodulating the measured frequency with a pseudo noise code, and a correlator part for demodulating the similar noise code into the original transmission data. ) Power line communication method is provided by high frequency transfer of code.

4. Uses of the Invention

Home Powerline Data Communication

Description

Power Line Communication Method by High Frequency Carriage of Pseudo Random Code

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

4 is a view showing in detail the configuration of the transmitter of the present invention;

5 is an operational waveform diagram of FIG.

6 is a diagram showing in detail the receiver configuration of the present invention.

Claims (4)

In a data communication method using a power line, a binary code is assigned to a pseudo random code on a transmitting side, and then a high frequency signal sequence obtained by allocating a high frequency signal having a frequency corresponding to the polarity and pulse of the code is transmitted to the power line and received. And demodulating the polarity and pulse width of the pseudorandom code by inversely demodulating the original binary code through a correlator. The demodulation method comprises: preparing a plurality of high frequency assignment patterns of pseudo random codes, generating a plurality of high frequency signal strings for the same pseudo random code, transmitting them to a power line, and separating the frequency of the high frequency signal strings by using a band pass filter on the receiving side. Compute the first process of demodulating a plurality of pseudorandom codes by inverting the polarity and the pulse width from the allocation method of the transmitting side, comparing the demodulated corresponding codes in units of chips, correcting errors in a majority voting scheme, and then converting them into one pseudo random code. And a second process of demodulating a binary code through a correlator. The power line as claimed in claim 2, wherein the frequency division pattern of the first step is further added to an error correction process employing a higher frequency level when the chip inverted from the measured frequency does not match. Communication method. In the data transmission method using a power line, in the case where the measured frequency is out of the use band, a complementary process is supplemented by the polarity and the chip width of the front and rear chips, and the error rate of each chip is assumed in the case of a mismatch between the polarity and the pulse between the adjacent chips. A power line communication method comprising an error correction process of adopting the most likely value based on solution probability theory and transmitting error correction. ※ Note: The disclosure is based on the initial application.