Invention Grant
US07002945B2 FDM-CDMA transmitting method, FDM-CDMA receiving method, FDM-CDMA transmitting device and FDM-CDMA receiving device
失效
FDM-CDMA发送方法,FDM-CDMA接收方法,FDM-CDMA发送装置和FDM-CDMA接收装置
- Patent Title: FDM-CDMA transmitting method, FDM-CDMA receiving method, FDM-CDMA transmitting device and FDM-CDMA receiving device
- Patent Title (中): FDM-CDMA发送方法,FDM-CDMA接收方法,FDM-CDMA发送装置和FDM-CDMA接收装置
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Application No.: US09851975Application Date: 2001-05-10
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Publication No.: US07002945B2Publication Date: 2006-02-21
- Inventor: Osamu Ichiyoshi
- Applicant: Osamu Ichiyoshi
- Applicant Address: JP Tokyo
- Assignee: NEC Corporation
- Current Assignee: NEC Corporation
- Current Assignee Address: JP Tokyo
- Agency: Whitham, Curtis & Christofferson P.C.
- Priority: JP2000-138181 20000511
- Main IPC: H04B7/216
- IPC: H04B7/216 ; H04B1/69 ; H04B1/707 ; H04J3/06

Abstract:
A spreading code setting circuit generates N vectors, as spreading codes, which are +1 or −1 polarity and are unique to users. A multiplier multiplies the nth data and the nth spreading code corresponding thereto for the spread modulation. An FDM combining circuit modulates N pieces of data according to the FDM method. A FDM separating circuit demodulates received signals according to the FDM method. An inverse spreading code setting circuit generates N vectors, as inverse spreading codes, which are +1 or −1 polarity and are unique to users at the transmission side. A multiplier multiplies the nth data and the nth inverse spreading code corresponding thereto for inverse spread modulation.
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