Improved Chirp Filters/Signals.
DEPARTMENT OF THE NAVY WASHINGTON DC
Pagination or Media Count:
A discrete chirp generator produces discrete chirp signals which correspond to either of two exponential functions, namely the functions exp j pi m sq alphaN or exp j pi mmbetaalphaN, where m equal 0, 1, 2, ..., M. Typically, M and N might both have the value 256. Similarly, a discrete chirp filter is described by its impulse response which has one of these same two functional forms. These two new components discrete chirp generator and discrete chirp filter can be used to implement a an improved type of frequency synthesizer, and b an improved type of discrete Fourier transformer. In the former, a single generator is used in conjunction with delay, conjugation, multiplication, and low-pass filter components to achieve an improved synthesizer. In the latter, either of the two discrete chirp function generators is combined with an input signal g sub n in a multiplier. Author
- Electrical and Electronic Equipment