This paper describes two methods of generating an analog frequency-modulated waveform by the use of a small number of digital samples of the "chirp" waveform. The number of digital samples required is a function of the time-bandwidth product. For certain values of time-bandwidth product, this type of signal generation becomes extremely efficient. Several proofs are offered which show how to select "optimum" values of time-bandwidth products. Two hardware implementations are suggested. One is based on the use of modulo arithmetic and a small stored memory table. The second method utilizes the inherent signal symmetries available if "optimum" time-bandwidth products are selected. The symmetrical signal patterns are stored in recirculating reversible shift registers which can be read out at high speeds.
Chirp Waveform Generation Using Digital Samples
IEEE Transactions on Aerospace and Electronic Systems ; AES-10 , 1 ; 10-16
1974-01-01
1573216 byte
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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