Wideband digital receiver comprising a phase jump detection mechanism

摘要

A wideband digital receiver includes an antenna, an amplifier, and a digital IFM device for measuring the frequency of the received signal or signals based on the result of discrete Fourier transforms DFT applied to said received signals. The receiver includes means for periodically estimating the phase jumps of said signals by combining the measurements of the phase of said signals produced by the transforms DFT.

主权项

1. A wideband digital receiver comprising:
a single antenna configured to receive one or more signals, a digital Instantaneous Frequency Measurement (IFM) device configured to measure a frequency of the received one or more signals based on a plurality of results of discrete Fourier transforms (DFTs) applied to said received one or more signals, and a module configured to periodically estimate phase jumps of said one or more signals by determining at least two intermediate phase deviations Δφn,1, Δφn,2 and by deducing a phase jump value Δφn from a comparison between said intermediate phase deviations and combining measurements of a phase of said one or more signals produced by the DFTs, wherein the digital IFM device comprises N branches arranged in parallel, each branch being configured to measure the frequency and a phase of the received signal or signals after digitization, said digitization being performed with a sampling frequency (Fe,1, . . . , Fe,N) specific to the each branch, each sampling frequency being less than a double of the radiofrequency bandwidth of the digital IFM and providing acquisition sequences having a same duration in each branch, the phase measurements produced being used to estimate for the each branch a respective phase jump value.