Digital front-end and frame detection technology applied to frequency division power line carrier communication

Abstract

The invention discloses a digital front-end and frame detection technology applied to frequency division power line carrier communication. The digital front-end and frame detection technology comprises a transmitter and a receiver; the transmitter comprises a pilot generator, a multi-stage interpolation FIR filter, a multi-stage interpolation CIC filter and a mixer; the receiver comprises a multipath mixer, a multipath multistage extraction CIC filter, a multipath multistage extraction FIR filter and a multipath frame detection module. The technology is based on an equivalent complex baseband technology, and supports configurable center frequency point, configurable bandwidth and suppression of interference out of band. According to the receiver provided by the invention, the digital front-end and frame detection module in an equivalent complex baseband form is realized in a multipath form, the parallel frame detection capacity of multipath frequency domain incoherent carrier signals with the same bandwidth and different central frequency is supported, and thus blind detection of the carrier signal of the transmitter configured at any frequency is achieved on the receiver.

Description

technical field [0001] The invention belongs to the field of power line carrier communication supporting the Internet of Things, and in particular relates to a digital front end and frame detection technology for frequency division power line carrier communication. Background technique [0002] Different from wireless and proprietary communication line communication technologies, power line carrier communication channels vary greatly with power line topology, access to electrical equipment, and communication access locations. This includes line impedance, signal attenuation, and channel noise. In general, power line carrier communication channels have frequency selectivity, time variation, colored background noise, narrowband interference, and various impulse noises. In terms of attenuation, the low frequency band (<500kHz) is much lower than the high frequency band (>2MHz). However, the noise floor in the low frequency band is much higher than that in the high frequ...

AI Technical Summary

Problems solved by technology

The application of the digital front end in the form of equivalent complex baseband in power line carrier communication is mentioned again, but it does not implement multiple channels on the receiver, but only implements one channel in the transmitter and receiver.

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