PATENT CLAIM ANALYSIS

Application Number: 16307059
Application Type: Utility
Filing Date: 2018-12
Publication Date: 2019-05
Patent Classification: ["375", "139000"]

Abstract:
A method for demodulating a received signal resulting from the modulation of a basic chirp signal including estimating of a symbol carried by the received signal, implementing the following sub-steps: determining N decision components from the received signal and from a reference chirp signal obtained by modulating the basic chirp signal by a reference symbol corresponding to a symbol of rank r, a decision component of index l, denoted as a component D l , being a function of a term, the phase of which depends quadratically on l, with l being an integer from 0 to N−1; and deciding the rank {circumflex over (k)} of the symbol carried by the received signal, from the decision component, of index k, denoted as a component D k , having an extremum value among the N decision components,

Claim (Index 12):
A device for demodulating a received signal,\n said received signal resulting from the modulation of a basic chirp signal said received signal resulting from the modulation of a basic chirp signal, an instantaneous frequency of which varies linearly between a first instantaneous frequency f 0  and a second instantaneous frequency f 1  for a symbol time Ts, said modulation corresponding, for a symbol of rank s of a constellation of N symbols, s being an integer from 0 to N\u22121, to a circular permutation of the pattern of variation of said instantaneous frequency on said symbol time Ts, obtained by a time shift of s times an elementary time duration Tc, such that N*Tc=Ts, and from the transmission of the modulated chirp signal in a transmission channel, wherein the device comprises a reprogrammable computation machine or a dedicated computation machine, capable of and being configured for, for N samples of said received signal and for N samples of a reference chirp signal obtained by modulating said basic chirp signal by a reference symbol corresponding to a symbol of rank r in said constellation, taken at the same multiple instants of Tc:\n conjugating N samples of said reference chirp signal, respectively said N samples of said received signal, to deliver N samples of a conjugate chirp signal; \n multiplying, term by term, said N samples of said conjugate chirp signal by said N samples of said received signal, respectively of said reference chirp signal, delivering N samples of a multiplied signal; \n executing a forward or inverse Fourier transformation of said multiplied signal, to deliver N samples Y 1  of a transformed signal with l being an integer from 0 to N\u22121; \n determining N decision components from said N samples Y l  of the transformed signal, \n a decision component of index l, denoted as a component D 1 , being a function of a term of which the phase depends quadratically on l, with l being an integer from 0 to N\u22121; \n deciding the rank {circumflex over (k)} of the symbol carried by said received signal from the decision component, of index k, denoted as a component D k , having an extremum value among said N decision components, \n said component D k  furthermore being a function of a term proportional to an amplitude of the sample of said index k, Y k , among said N samples Y 1  of said transformed signal, as well as of the phase of said sample Y k .

Metadata:
- Claim Count in Document: 1.0
- Percentile: 98.0
- Lexical Diversity: 2.22059
- Patent Class: 375.0
- Transitional Phrase Type: none
- Component Type: 0
- Foreign Priority: True
- Related Applications: ['11992047', '13574773', '13576814', '15295349', '11665311']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.4802573146094261
- 35 USC 102 Novelty (BERT): 0.5070090032407572
- Combined Prediction Score: 0.4829324834725592
- Mean Citation Score: 250.290662
- Max Citation Score: 263.57712000000004
- Similarity Product: 202.82954237051013

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 1
- Claim Label 112: 0
- Combined Label: 1
- Label 101 Adjusted: 1

Dataset: test