Title:
ＶＳＢ変調装置及びＶＳＢ変調波生成方法
Document Type and Number:
Japanese Patent JP4256433
Kind Code:
B2
Abstract:
A vestigial sideband (VSB) modulation apparatus includes a signal processing unit which extracts an I-axis data signal component and a Q-axis data signal component from a baseband signal with symbol data superimposed thereon, a band-limiting filter which frequency-shifts the I-axis data signal component and the Q-axis data signal component, extracted by the signal processing unit, by only a specific frequency smaller than a rate of the symbol data and limits a passband width by a frequency width smaller than the rate of the symbol data, and a quadrature modulating unit which obtains a VSB modulation signal by quadrature-modulating the I-axis data signal component and the Q-axis data signal component output from the band-limiting filter.
Inventors:
堀川 征一郎
小原 則和
小原 則和
Application Number:
JP2007136887A
Publication Date:
April 22, 2009
Filing Date:
May 23, 2007
Export Citation:
Assignee:
株式会社東芝
International Classes:
H04L27/04; H03C1/60
Attorney, Agent or Firm:
中村 誠
峰 隆司
村松 貞男
橋本 良郎
河野 哲
福原 淑弘
蔵田 昌俊
鈴江 武彦
峰 隆司
村松 貞男
橋本 良郎
河野 哲
福原 淑弘
蔵田 昌俊
鈴江 武彦