Title:
DIGITAL UP-CONVERTER
Document Type and Number:
Japanese Patent JP3760113
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a digital up-converter which transmits a broadband signal and is realized by hardware with a simple configuration concerning a method for constituting the digital up-converter to be the configuration element of software radio equipment.
SOLUTION: The digital up-converter is constituted by providing a band limit filter means for limiting a band with respect to an inputted signal, a numerical value control oscillating means for generating a symbol timing signal based on a set value, an interpolation filter means for adopting the output of the band limit filter means as an input and converting the symbol rate based on the timing signal which is generated by the numerical control oscillating means and an unnecessary higher harmonic (alias) restricting filter means for receiving the output of the interpolation filter means.
Inventors:
Hiroshi Shirato
Application Number:
JP2001170502A
Publication Date:
March 29, 2006
Filing Date:
June 06, 2001
Export Citation:
Assignee:
Nippon Telegraph and Telephone Corporation
International Classes:
H03D7/00; H03H17/00; H03H17/02; (IPC1-7): H03D7/00; H03H17/00; H03H17/02
Domestic Patent References:
| JP5315891A | ||||
| JP7015478A | ||||
| JP9326671A | ||||
| JP2000252791A | ||||
| JP8079794A | ||||
| JP9312549A | ||||
| JP10308783A |
Attorney, Agent or Firm:
Kenji Okada
Takumi Iritono
Yasushi Motoyama
Takumi Iritono
Yasushi Motoyama