Pulse or digital communications – Receivers
Reexamination Certificate
2007-04-10
2007-04-10
Bocure, Tesfaldet (Department: 2611)
Pulse or digital communications
Receivers
C375S147000
Reexamination Certificate
active
10362655
ABSTRACT:
A method for performing frequency analysis by executing discrete Fourier transform with a smaller capacity of a memory than in usual FFT processing, without reducing the frequency resolution. A-power-of-two NA=2a(where “a” is an integer) memories for discrete Fourier transform are prepared. A former-stage calculation step of taking out frequency components of an input signal having a-power-of-two NB=2b(where “b” is an integer and b>a) data items, in a comb manner and of calculating NAintermediate data items and a latter-stage calculation step of applying fast Fourier transform to the intermediate data items obtained in the former-stage calculation step, by using the NAmemories for discrete Fourier transform are executed 2b−atimes with the frequency components taken out in the comb manner being changed, to execute discrete Fourier transform through 2b−aoperations.
REFERENCES:
patent: 6233550 (2001-05-01), Gersho et al.
patent: 1-031-933 (2000-08-01), None
patent: 60-164868 (1985-08-01), None
Coenen et al., “Novel Fast GPS/GLONASS Code-acquistion Technique using low update rate FFT,” Electronics Letters, 23rd Apr. 1992, vol. 28, No. 9, pp. 863-865.
Nitta Manabu
Tanaka Katsuyuki
Bocure Tesfaldet
Lerner David Littenberg Krumholz & Mentlik LLP
Sony Corporation
LandOfFree
Frequency analysis method and apparatus, and spectrum... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Frequency analysis method and apparatus, and spectrum..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Frequency analysis method and apparatus, and spectrum... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3753310