Frequency hopping multi-carrier communication method of electric power communication system
A power communication system and multi-carrier communication technology, applied in distribution line transmission system, transmission system, digital transmission system, etc., can solve the problems of low PLC user mutual interference and low bandwidth
Active Publication Date: 2021-05-11
STATE GRID HUNAN ELECTRIC POWER +2
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Problems solved by technology
However, if these poor-quality frequency bands are directly eliminated, the available bandwidth will be less, which is not advisable
[0005] Therefore, in the current power communication, there is no communication method that can fully utilize the available bandwidth in [0.3MHz, 20MHz], effectively avoid deep fading frequency points, and ensure low PLC user interference
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[0047] Such as image 3 Shown is the method flow diagram of the method of the present invention, Figure 4 Then it is a schematic diagram of the system flow of the method of the present invention: the frequency-hopping multi-carrier communication method of the power communication system provided by the present invention includes the following steps:
[0048] In the multi-carrier OFDM modulation scheme of PLC communication, the present invention adds a frequency hopping module to each OFDM sub-channel to form a frequency hopping OFDM system, such as Figure 4Shown; the frequency hopping sequence c in the frequency hopping module n (k) The structure of the frequency hopping multi-carrier system is a key part of determining the anti-interference and multiple access capabilities of the frequency hopping multi-carrier system; the present invention further designs a class of frequency hopping sequence sets with non-uniform distribution; Attenuation quality is closely related, tha...
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The invention discloses a frequency hopping multi-carrier communication method of an electric power communication system. The method comprises the following steps: acquiring a serial data stream needing to be sent by the electric power system; performing serial / parallel conversion on the serial data stream, and sending the serial data stream to a sub-channel; carrying out PSK mapping and frequency hopping processing on the sub-channels; superposing the data and then coupling and sending the data to a PLC channel; multiplexing PLC node user data; and the receiving end de-hops the received multiplexing data, and sends the multiplexing data to a processing sub-channel of the receiving end for related receiving, sampling, parallel / serial conversion and judgment to obtain final sending data. According to the invention, a scientific and reasonable frequency hopping sequence set is constructed, meanwhile, a frequency hopping multi-carrier communication method adopting non-uniform frequency hopping sequences is adopted, various interference signals in PLC communication can be effectively avoided, the transmission performance of a system is improved, mutual interference of PLC users can be effectively reduced, the bandwidth utilization rate is high, and the anti-interference capacity is high.
Description
technical field [0001] The invention belongs to the field of electric power communication, and in particular relates to a frequency-hopping multi-carrier communication method of an electric power communication system. Background technique [0002] With the development of economy and technology and the improvement of people's living standards, electric energy has become an indispensable secondary energy source in people's production and life, bringing endless convenience to people's production and life. Therefore, the stable and reliable operation of the power system has become one of the most important tasks of the power system. [0003] Power communication system is an important part of power system. Power line communication has serious interference. These interferences include: pulse interference generated by the start and stop of electrical equipment on the power line, additive interference on power, and channel frequency selective fading. The fading characteristics of...
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IPC IPC(8): H04L5/00H04B3/54
CPCH04L5/0012H04L5/0062H04B3/542Y02D30/70
Inventor 杨芳僚陈小惠陈永卫付暾伍晓平孙鹏方彬
Owner STATE GRID HUNAN ELECTRIC POWER