Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
153 words
A synthesizer of discrete signals, comprising: means for generating a chirp signal e j π(n(n+β)+α)/N, where n=0, 1, 2, . . . , M, and β, α and N are constants; means, having an input connected to the output of the chirp generating means, for delaying its input signal by a time delay τ k , k=0, 1, 2, . . . , M; means, also having an input connected to the output of the chirp generating means, for converting the signal at its input into a signal which is the complex conjugate of its input signal; means having as its two inputs the outputs of the delaying and the converting means, for multiplying its input signals; and means, whose input is connected to the output of the multiplying means, for filtering its input signal in order to remove high-frequency components of the input signal, the output signal being a complex sinusoidal frequency.
Claim 2
Dependent Claim
153 words
A synthesizer of discrete signals, comprising: means for generating a chirp signal e j π(n(n+β)+α)/N, where n=0, 1, 2, . . . , M, and β, α and N are constants; means, having an input connected to the output of the chirp generating means, for delaying its input signal by a time delay τ k , k=0, 1, 2, . . . , M; means, also having an input connected to the output of the chirp generating means, for converting the signal at its input into a signal which is the complex conjugate of its input signal; means having as its two inputs the outputs of the delaying and the converting means, for multiplying its input signals; and means, whose input is connected to the output of the multiplying means, for filtering its input signal in order to remove high-frequency components of the input signal, the output signal being a complex sinusoidal frequency.
Claim 3
Dependent Claim
23 words
The generator according to claim 1, wherein: the generator means generates a signal e j π(n.spsp.2 + α)/N, β being equal to 0.
Claim 4
Dependent Claim
18 words
The generator according to claim 1 wherein: the signal generating means is a surface acoustic wave (SAW) device.
Claim 5
Dependent Claim
17 words
The generator according to claim 1 wherein: the signal generating means is a digital read-only memory (ROM).
Claim 6
Dependent Claim
16 words
The generator according to claim 1 wherein: the signal generating means is a random-access memory (RAM).
Claim 7
Dependent Claim
125 words
A discrete Fourier transform (DFT) analyzer having an input to which a signal g n may be applied, n=0, 1, 2, . . . , M, comprising: an input means for complex multiplying, adapted to receive the signal g n and the signal ##EQU8## a filter means, whose complex input is connected to the complex output of the input multiplying means, having a plurality of taps weighted according to the function e j π(n.spsp.2 + α)/N, for convolving with its input signal; and an output means for complex multiplying, having as inputs the output of the complex filter means and a signal ##EQU9## the output signal G m of this means for multiplying being the discrete Fourier transform of the input signal g n .
Claim 8
Dependent Claim
125 words
A discrete Fourier transform (DFT) analyzer having an input to which a signal g n may be applied, n=0, 1, 2, . . . , M, comprising: an input means for complex multiplying, adapted to receive the signal g n and the signal ##EQU8## a filter means, whose complex input is connected to the complex output of the input multiplying means, having a plurality of taps weighted according to the function e j π(n.spsp.2 + α)/N, for convolving with its input signal; and an output means for complex multiplying, having as inputs the output of the complex filter means and a signal ##EQU9## the output signal G m of this means for multiplying being the discrete Fourier transform of the input signal g n .
Claim 9
Dependent Claim
15 words
The DFT analyzer according to claim 6 wherein: the filter means ia a SAW device.