Pulse or digital communications – Systems using alternating or pulsating current – Antinoise or distortion
Reexamination Certificate
2007-03-06
2007-03-06
Le, Vu (Department: 2635)
Pulse or digital communications
Systems using alternating or pulsating current
Antinoise or distortion
C375S219000, C375S296000, C375S340000, C375S342000
Reexamination Certificate
active
10490090
ABSTRACT:
The method of noise-immune information transmission of the present invention permits to increase the communication channel capacity without reducing the noise immunity of information being transmitted. In this method, informational digital samples are transmitted in the form of analog signal supplemented with a redundant information signal. The technical result is obtained owing to the fact that at the transmitting side: selecting at least one benchmark point between informational samples; in each selected benchmark point, determining an analog signal value to which said informational digital samples are converted using a second sampling function; converting the samples in the benchmark points to the redundant information signal in order to supplement said analog signal; selecting a difference between power levels for transmitting the most significant bits of each informational sample depending on a predetermined signal-to-noise ratio at the input of the receiving side, and selecting the power levels for transmitting the samples of the benchmark points, a difference between which power levels is less than a difference selected for a power levels of the most significant bits; at the receiving side: according to the recovered digital samples, discovering the least significant bits by subtraction of the most significant bits; according to the discovered least significant bits, constructing an envelope using a second sampling function and discovering a value of this envelope in a respective benchmark point; comparing the discovered value of the envelope in the specific benchmark point with the corresponding value recovered from the received signal; in the case of lack of coincidence of compared values, choosing a set of digital samples which set ensures the coincidence, which is the correction.
REFERENCES:
patent: 4336612 (1982-06-01), Inoue et al.
patent: 7110465 (2006-09-01), Kaku et al.
patent: 2002/0136281 (2002-09-01), Grohn
patent: 2006/0098746 (2006-05-01), Candy et al.
Dounaev Igor Borisovich
Letounov Leonid Alexeyevich
Hoang Duy
Le Vu
Notaro & Michalos P.C.
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