A digital front end and frame detection method for frequency division power line carrier communication

Abstract

The invention discloses a digital front end and a frame detection method for frequency division power line carrier communication. The digital front end and frame detection method include a transmitter and a receiver; the transmitter includes a preamble generator, a multi-stage interpolation FIR filter, a multi-level stage interpolation CIC filter, and mixer; the receiver includes a multi-channel mixer, a multi-channel multi-stage decimation CIC filter, a multi-channel multi-stage decimation FIR filter, and a multi-channel frame detection module; the present invention is based on etc. Efficient complex baseband technology: support configurable center frequency, configurable bandwidth, and suppression of out-of-band interference; the receiver provided by the invention implements the digital front end and frame detection module in the form of equivalent complex baseband into a multi-channel form, and supports multiple The parallel frame detection capability of frequency-domain incoherent carrier signals with the same channel bandwidth and different center frequencies, and then realizes the blind detection of carrier signals configured at any frequency of the transmitter 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 a frame detection method 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 frequen...

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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