Invention Grant
US08634492B2 Transmitter and receiver for ultra-wideland OFDM signals employing a low-complexity CDMA layer for bandwidth expansion
有权
用于超宽带OFDM信号的发射机和接收机，采用低复杂度CDMA层进行带宽扩展
- Patent Title: Transmitter and receiver for ultra-wideland OFDM signals employing a low-complexity CDMA layer for bandwidth expansion
- Patent Title (中): 用于超宽带OFDM信号的发射机和接收机，采用低复杂度CDMA层进行带宽扩展
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Application No.: US11597587Application Date: 2005-05-20
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Publication No.: US08634492B2Publication Date: 2014-01-21
- Inventor: Charles Razzell
- Applicant: Charles Razzell
- Applicant Address: NL Eindhoven
- Assignee: NXP, B.V.
- Current Assignee: NXP, B.V.
- Current Assignee Address: NL Eindhoven
- International Application: PCT/IB2005/051658 WO 20050520
- International Announcement: WO2005/114858 WO 20051201
- Main IPC: H04L27/00
- IPC: H04L27/00 ; H04B1/00
Abstract:
A method and apparatus for transmitting and receiving high-bandwidth OFDM signals, while limiting the complexity of the OFDM signal processing is described. Bandwidth expansion is achieved by repetition of whole OFDM symbols with the polarity of repetitions determined by a long PN code. This technique ensures a perfectly white spectrum. Use of zero-suffix OFDM symbols allows a large tolerance to multipath channels, even while maintaining a single, low-rate RAKE finger for despreading in the receiver.
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