Power line spread spectrum communication equipment

Abstract

The invention discloses power line spread spectrum communication equipment. The power line spread spectrum communication equipment comprises a power module, an RS232 serial port connected with an upper computer, a lower computer, a storage device, a spread spectrum modem, a prime amplifier, a power amplifier, a band-pass filter and a coupling circuit, wherein the coupling circuit is connected with a power line, the signal output end of the coupling circuit is connected with the signal input end of the band-pass filter, the output end of the band-pass filter is connected with the signal input end of the prime amplifier, the signal output end of the prime amplifier is connected with the signal input end of the spread spectrum modem, the signal output end of the spread spectrum modem is connected with the signal input end of the lower computer, the power module supplies power for the lower computer, the signal output end of the lower computer is connected with the storage device, the communication serial port of the lower computer is connected with the RS232 serial port, and the upper computer is in communication with the lower computer through the RS232 serial port. The power line spread spectrum communication equipment has the advantages of being high in sensitivity and anti-interference capability, low in production cost, economical and reliable.

Description

technical field [0001] The invention relates to the technical field of power communication, in particular to a power line spread spectrum communication device. Background technique [0002] Power line communication technology is a communication method that uses power lines to transmit data and voice signals. This communication method effectively uses the existing distribution network as a transmission line without laying additional cables, thus greatly reducing line investment and cost; at the same time, with the advancement of power line communication technology and the development of smart grid , The transmission rate of the power line network is getting higher and higher, and the current rate can reach 200Mbps, which is not inferior to the optical cable and copper cable; not only that, the power line network also has the advantages of always online and wide coverage. Based on the above advantages, the market demand for power line communication technology is gradually inc...

AI Technical Summary

Problems solved by technology

However, although the existing technical solutions of the multi-carrier spread spectrum power line communication system have high modulation efficiency and a satisfactory transmission rate, the structure of the OFDM receiver is complex, and the required protocol It is also complex, and the cost of construction is high. At the same time, because OFDM is implemented by fast Fourier transform, the frequency interval between subcarriers is fixed and reaches the minimum value. If there is any error in the carrier frequency, the carrier frequency will lose its correctness. It is extremely sensitive to strong noise interference, and its reliability and adaptability are not satisfactory in the power line transmission environment with large impulse noise interference.

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