Thales

Thierry Briand

Gilles Guerbeur

Pierre Kernaleguen

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.

Wideband digital receiver comprising a phase jump detection mechanism

A wideband microwave digital receiver comprises an antenna, an amplifier, and a digital IFM device for measuring the frequency of the received signal or signals. A consistency indicator indicates the consistency of the frequency measurements and is calculated by analyzing the values taken by said measurements obtained over two consecutive transforms. The presence of signal pulses at the input of the receiver is detected when said indicator signals the consistency of at least one frequency measurement.

Wideband digital receiver comprising a signal detection mechanism

A microwave receiver measures the frequency F of a microwave signal in a band of frequencies whose maximum frequency is Fmax. The receiver has N frequency measuring digital stages EE, . . . Ek, . . . EN providing N ambiguous frequency measurements FmFm, . . . Fmk, . . . FmN of the signal received, the signal received being sampled, in each digital stage, at a respective sampling frequency FeFe, . . . Fek, . . . FeN. The receiver further includes an ambiguity resolving device () receiving the N frequency measurements and providing the frequency F of the signal received. Each frequency measuring digital stage Ek has a one-bit analog/digital converter () fed directly with the microwave signal received by the receiver, means for performing a discrete Fourier transform on the basis of the samples output by the one-bit converter, and at least one detector () of spectral line maximum of the discrete Fourier transform providing a frequency measurement Fmk of the signal received.

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Croissy sur Seine, France

Thierry Briand