Software defined radio system

Details Software defined radio system Software defined radio system

2008-07-22

2008-07-22

Payne, David C. (Department: 2611)

Pulse or digital communications

Receivers

Particular pulse demodulator or detector

C375S350000, C375S355000

Reexamination Certificate

active

11025944

ABSTRACT:
The invention provides a technique that saves rate conversion accompanying complicated calculations and shares an analog filter for anti-aliasing in a sampling device. The sampling device employs an anti-alias filter having a fixed cutoff frequency, an A/D converter and a D/A converter each having a clock signal input, which are capable of varying a sampling frequency, and a PLL circuit capable of varying the frequency of a clock signal; and it sets the sampling frequency not lower than an integral multiple of a signal bandwidth and double the cutoff frequency for sampling.

REFERENCES:
patent: 6496546 (2002-12-01), Allpress et al.
patent: 7203488 (2007-04-01), Luneau
patent: 5-300017 (1992-04-01), None
patent: 2003-198257 (2001-12-01), None
Kohno et al., “Current Status and the Future of Software Radio”, pp. 1112-1119.
Kohno et al., “Current Status and the Future of Software Radio”, Transactions of the Institute of Electronics, Information and Communication Engineers, B vol. J84-B No. 7, Jul. 2001, pp. 1112-1119, Total of 30 pages in English translation.

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