Title:
METHOD, DEVICE FOR GENERATING LOCAL OSCILLATION FREQUENCY METHOD AND EQUIPMENT FREQUENCY HOPPING SPREAD SPECTRUM COMMUNICATION
Document Type and Number:
Japanese Patent JPH10209922
Kind Code:
A
Abstract:
To generate a local oscillation frequency at high speed in the state of hopping inside a widely secured frequency range.
When any arbitrary frequency 41 is generated from a direct digital synthesis system synthesizer 10 at the same frequency interval as a local oscillation frequency 48 while defining its peak frequency as fd and synthesized with any one of frequencies 43-45 generated from respective synthesizers 21-23 as FMI+mFD (M:0,1,2... ... ..., M) through a frequency converter 25 later, within the wide frequency range, the desired local oscillation frequency 48 is generated at a high speed while extending a hopping distance.
Inventors:
SASAE RITSUKO
KAWAMOTO KIYOSHI
ITO MASAHIRO
KAWAMOTO KIYOSHI
ITO MASAHIRO
Application Number:
JP1160797A
Publication Date:
August 07, 1998
Filing Date:
January 24, 1997
Export Citation:
Assignee:
HITACHI LTD
International Classes:
H04B1/26; H04B1/713; H04B1/7136; (IPC1-7): H04B1/713; H04B1/26
Attorney, Agent or Firm:
Masami Akimoto
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