Radio frequency signal transmission method and device

Patent metadata

Field	Value
Publication number	US-9270300-B2
Application number	US-201414177358-A
Country	US
Kind code	B2
Filing date	Feb 11, 2014
Priority date	Feb 15, 2013
Publication date	Feb 23, 2016
Grant date	Feb 23, 2016

Abstract

A method for generating a radio frequency signal, wherein a signal to be transmitted is decomposed into a weighted sum of periodic basic signals of different frequencies.

First claim

What is claimed is:

1. A method for generating a radio frequency signal to be transmitted comprising:
generating a plurality of periodic basic signals of different frequencies;
decomposing a digital signal into a weighted sum of the plurality of periodic basic signals of different frequencies and;
adjusting weighting coefficients based on a sample of the weighted sum of the plurality of periodic basic signals to verify the radio frequency signal being transmitted.

2. The method of claim 1 , wherein a frequency of a highest carrier component is lower than a frequency of at least one of the plurality of periodic basic signals.

3. The method of claim 2 , wherein the frequency of the highest carrier component is lower by at least a factor of ten than the frequency of the at least one of the plurality of periodic basic signals.

4. The method of claim 1 wherein the weighting coefficients assigned to the plurality of periodic basic signals are calculated by a digital processor.

5. The method of claim 4 , comprising analog generation of the plurality of periodic basic signals, wherein the summing of said plurality of periodic basic signals weighted by the weighting coefficients is calculated by the digital processor.

6. A device for generating a radio frequency signal to be transmitted comprising:
a processing circuit configured to
generate a plurality of periodic basic signals of different frequencies;
decompose a signal to be transmitted into a weighted sum of the plurality of periodic basic signals or different frequencies and;
adjust weighting coefficients based on a sample of the weighted sum of the plurality of periodic basic signals to verify the radio frequency signal being transmitted.

7. The device of claim 6 , wherein a frequency of the highest carrier component is lower than a frequency of at least one of the plurality of periodic basic signals of the decomposition.

8. The device of claim 6 , wherein the processing circuit comprises an analog circuit for analog generation of the plurality of periodic basic signals, and for summing up the plurality of periodic basic signals by applying to each of them a weighting coefficient.

9. The device of claim 8 , wherein the processing circuit comprises a voltage-controlled oscillator (VCO) assembled in a phase-locked loop, and a plurality of frequency dividers coupled to the VCO.

10. The device of claim 6 , wherein said plurality of periodic basic signals comprises sinusoidal signals and said decomposition comprises a Fourier series decomposition.

11. The device of claim 6 , wherein said plurality of periodic basic signals comprises square wave signals.

12. The device of claim 6 , further comprising:
a receive device comprising at least one analog pre-processing device coupled to the processing circuit and configured for delivering analog samples of an input radio frequency signal, and for performing a discrete Fourier transform on said analog samples.

13. The device claim 12 , wherein the at least one analog preprocessing device is configured to, in transmission phases, sample a signal representative of the transmitted signal, determine the discrete Fourier transform of this signal, digitize the discrete Fourier transform signal, and send the digitized signal to said processing circuit.

14. The device of claim 13 , wherein said processing circuit is configured to verify whether the received digital Fourier transform signal coincides with the decomposition into the plurality of periodic basic signals calculated before the transmission.

Assignees

• St Microelectronics Sa
• Inst Polytechnique Bordeaux
• Centre Nat Rech Scient
• Univ Bordeaux
• St Microelectronics Sa

Inventors

• Belot Didier
• Deval Yann
• Rivet Francois

Classifications

• H04B1/0014

  using DSP [Digital Signal Processor] quadrature modulation and demodulation · CPC title

• H04L27/2639

  Modulators using other transforms, e.g. discrete cosine transforms, Orthogonal Time Frequency and Space [OTFS] or hermetic transforms · CPC title

• H04L27/2642

  Wavelet transform modulators (wavelet-division H04L5/0008) · CPC title

• H04B1/0021 Primary

  Decimation, i.e. data rate reduction techniques (H04B1/0025 takes precedence) · CPC title

• H04B2001/0491

  with frequency synthesizers, frequency converters or modulators · CPC title