Title:
SIGNAL GENERATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2020/054173
Kind Code:
A1
Abstract:
In order to generate a high-quality signal having a broader bandwidth than an output bandwidth of a single sub-DAC by means of high-efficiency, high-precision compensation by using multiple sub-DACs and high-speed analog devices, a signal generation device is provided with: a digital signal processing unit; M (M is an integer equal to or greater than 2) sub-DACs having an analog bandwidth of fB; and a broadband analog signal generation unit for generating a broadband analog signal including components having a frequency of (M-1) fB or higher by using M analog signals output by the M sub-DACs. The digital signal processing unit is provided with: a means for generating M original divided signals, which are equivalent to signals obtained by dividing a desired output signal into M segments on a frequency axis and by down-converting the respective segments into basebands, and M folded divided signals obtained by folding the M original divided signals at the frequency axis; and 2M x M filters for, upon receiving the original divided signals and the folded divided signals as input, outputting M composite signals to be transmitted to the M sub-DACs, wherein response functions can be individually set to the 2M x M filters in accordance with 2M2 combinations of input and output.
Inventors:
YAMAZAKI HIROSHI (JP)
NAGATANI MUNEHIKO (JP)
NOSAKA HIDEYUKI (JP)
NAKAMURA MASANORI (JP)
MIYAMOTO YUTAKA (JP)
NAGATANI MUNEHIKO (JP)
NOSAKA HIDEYUKI (JP)
NAKAMURA MASANORI (JP)
MIYAMOTO YUTAKA (JP)
Application Number:
PCT/JP2019/025018
Publication Date:
March 19, 2020
Filing Date:
June 24, 2019
Export Citation:
Assignee:
NIPPON TELEGRAPH & TELEPHONE (JP)
International Classes:
H04B1/04; H03M1/66; H04J1/00
Domestic Patent References:
| WO2017033446A1 | 2017-03-02 |
Foreign References:
| JP2018042073A | 2018-03-15 | |||
| JP2017184053A | 2017-10-05 |
Attorney, Agent or Firm:
TANI & ABE, P.C. (JP)
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