Method for reducing power line carrier communication radiation interference
A power line carrier and radiation interference technology, applied in distribution line transmission systems, electrical components, transmitter monitoring and other directions, can solve the problem of unavoidable short-wave frequency bands, and achieve the effect of reducing external radiation interference and reducing transmission power
Active Publication Date: 2018-12-07
BEIJING SMARTCHIP MICROELECTRONICS TECH COMPANY +3
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Problems solved by technology
However, due to the intensive use of short-wave frequency bands in military and civilian radio, this method is difficult to avoid for short-wave frequency bands.
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[0022] The specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments.
[0023] Unless expressly stated otherwise, throughout the specification and claims, the term "comprise" or variations thereof such as "includes" or "includes" and the like will be understood to include the stated elements or constituents, and not Other elements or other components are not excluded.
[0024] In the communication process of the PLC system, due to the factors of line attenuation, a constant transmission power is generally used to ensure that the receiving end with the largest attenuation can receive the signal normally, but at a large number of receiving ends with small attenuation, the signal amplitude is seriously excessive.
[0025] Based on the above idea, the present invention provides a method for re...
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The invention discloses a method for reducing power line carrier communication radiation interference. The method comprises the following steps: all communication nodes conduct communication accordingto the maximum transmitting power of the communication nodes, and an initial communication network topology is established; a center node establishes an initial routing table according to collected signal-to-noise ratio counting information, the initial transmitting power of each communication node and the initial communication network topology and sends the initial routing table; each communication node broadcasts and transmits power negotiation frames to all next-hop nodes of the communication node, and the next-hop nodes conduct signal-to-noise ratio measurement on received signals after receiving the power negotiation frames and return a signal-to-noise ration measurement results to the sending node; and the sending node adjusts the size of the transmitting power according to the received signal-to-noise ration measurement result and conducts communication according to the adjusted transmitting power. According to the method for reducing the power line carrier communication radiation interference, the power line carrier communication radiation interference can be greatly reduced under the low cost condition, and the method can be applied in both an indoor environment and an outdoor environment.
Description
technical field [0001] The invention relates to the field of power line carrier communication, in particular to a method for reducing radiation interference of power line carrier communication. Background technique [0002] Low-voltage power line broadband carrier communication (PLC) is a special communication method that uses low-voltage power distribution lines as an information transmission medium for voice or data transmission. [0003] The frequency bands of existing power line carrier communication systems include low-speed narrowband (30kHz-500kHz) and high-speed (1MHz-30MHz) communication. The transmission power frequency band of low-voltage power line carrier is limited to below 1MHz. The power line high-speed carrier is affected by the external power network with low transmission power. The basic frequency band of low-speed narrowband communication is below 1MHz, which is easy to generate electromagnetic emission power. [0004] The mechanism of electromagnetic t...
Claims
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Login to View More IPC IPC(8): H04B3/54H04B17/10H04B17/336H04L12/741H04L12/751H04L45/02H04L45/74
CPCH04B3/54H04B17/102H04B17/336H04L45/02H04L45/54
Inventor 宋彦斌王贤辉王立城甄岩王东山赵冲
Owner BEIJING SMARTCHIP MICROELECTRONICS TECH COMPANY