A broadband power line carrier data transmission method and device

Abstract

The invention provides a method for sending broadband carrier data. The method includes sampling data sent by channels; conducting fast Fourier transform on sampled data; respectively calculating the channel noise energy value N [i] corresponding to each frequency subcarrier after fast Fourier transform, wherein i is a positive integer; comparing the channel noise energy value N [i] corresponding to each frequency subcarrier with a preset channel noise threshold T [i] corresponding to each frequency subcarrier, wherein the preset channel noise threshold T [i] indicates the tolerance of each channel for noise; determining whether the times when the N [i] is greater than T [i] are greater than a preset value Nset; and shielding at least one corresponding subcarrier, of which the N [i] is greater than T [i], if the times when the N [i] is greater than T [i] are lower than or equal to a preset value Nset. The subcarriers sending by channels with noise exceeding the tolerance are shielded to prevent emission energy waste, so that emission energy is more integrally and effectively used on channels with lower power consumption. The power consumption of a system is integrally reduced.

Description

technical field [0001] The invention relates to the field of communication, in particular to a method and device for transmitting broadband power line carrier data. Background technique [0002] With the development of Internet technology and communication technology, power carrier communication technology has gradually transitioned from narrowband (50-500khz) to broadband (2-30M). Compared with traditional narrowband power carrier technology, broadband power carrier technology has many advantages such as high speed, long transmission distance and high coverage. But on the other hand, since the broadband carrier works at a higher frequency, its ability to resist channel attenuation is relatively limited. In order to meet the performance requirements of transmission distance and anti-noise, it often needs to pay a higher power consumption price. Broadband power carrier technology mostly uses technology based on OFDM (Orthogonal Frequency Division Multiplexing) to modulate si...

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Problems solved by technology

But on the other hand, since the broadband carrier works at a higher frequency, its ability to resist channel attenuation is relatively limited. In order to meet the performance requirements of transmission distance and anti-noise, it often needs to pay a higher power consumption price.

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