SIGNAL GENERATION APPARATUS, SIGNAL GENERATION METHOD, AND COMPUTER PROGRAM

Abstract: a signal generation device that includes a digital signal processing unit, a plurality of sub-digital-analog conversion units that respectively converts a plurality of digital signals output from the digital signal processing unit into analog signals, and an analog multiplexer that multiplexes the analog signals output from the plurality of sub-digital-analog conversion units to generate a broadband signal, in which the digital signal processing unit includes a band division unit that divides an input signal for each frequency width of a common divisor of a nyquist frequency of the plurality of sub-digital-analog conversion units and a clock frequency of the analog multiplexer to generate n (n is a number of divisions) divided signals, a spectrum folding unit that has the n divided signals generated by the band division unit branched on a path, and folds back the branched n divided signals on a frequency axis to obtain complex conjugation to generate n folded divided signals corresponding to the n divided signals, a filter that receives the n divided signals and the n folded divided signals as inputs and generates n composite signals, and a band combining unit that receives the n composite signals as inputs and generates a plurality of digital signals corresponding to the respective sub-digital-analog conversion units.

Inventor(s): Masanori NAKAMURA, Hiroshi YAMAZAKI, Munehiko NAGATANI, Fukutaro HAMAOKA, Takayuki KOBAYASHI, Yutaka MIYAMOTO

CPC Classification: H04J1/08 (Arrangements for combining channels {(branching filters , )})

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