Method of synthesis of an analogue noise, noise synthesizer and coding chain using such a synthesiser
AssigneeThales
InventorsBruno Lelong, Patrice Barret
Life of this patent
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Abstract
A method comprises at least the following steps: generating pseudo random noise in the digital domain coded on a number N of bits, sampled at a given frequency FH/N; multiplexing in the digital domain the binary signals produced by each of the N bits at a sampling frequency FH so as to obtain noise coded on one bit at said frequency FH; transferring the noise thus coded into the analog domain via a low-voltage differential transmission interface; filtering the analog signal in a passband which can be centered on half the sampling frequency of an analog-digital converter.
Claims16
A method of synthesizing analog noise, comprising at least the following steps:
- generating pseudo random noise in a digital domain coded on a number N of bits with a noise generator, sampled at a given frequency FH/N, FH being a frequency;
- multiplexing in a digital domain with a multiplexer binary signals produced by each of the N bits at the sampling frequency FH so as to obtain noise coded on one bit at said sampling frequency FH;
- and
- transferring the noise thus coded into an analog domain via a differential transmission interface,
- wherein the differential transmission interface is of a LVDS (Low Voltage Differential Signal) type.
An analog noise synthesizer, comprising at least the following modules:
- a module for generating pseudo random noise in a digital domain coded on a number N of bits, sampled at a given frequency FH/N, FH being a frequency;
- a multiplexer carrying out in the digital domain a multiplexing of binary signals produced by each of the N bits at a sampling frequency FH so as to obtain noise coded on one bit at said frequency FH;
- and
- a differential transmission interface for transferring the noise thus coded into an analog domain,
- wherein the differential transmission interface is of a LVDS (Low Voltage Differential Signal) type.
Dependencies are inferred from the claim text.