Invention Grant
US07826514B2 Radio transmitter-receiving apparatus and radio transmitting-receiving method for estimating noise and interference power in radio transmission using code spread
有权
无线电发射机接收设备和用于使用码扩展估计无线电传输中的噪声和干扰功率的无线电发射接收方法
- Patent Title: Radio transmitter-receiving apparatus and radio transmitting-receiving method for estimating noise and interference power in radio transmission using code spread
- Patent Title (中): 无线电发射机接收设备和用于使用码扩展估计无线电传输中的噪声和干扰功率的无线电发射接收方法
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Application No.: US10526225Application Date: 2004-04-26
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Publication No.: US07826514B2Publication Date: 2010-11-02
- Inventor: Yoshikazu Kakura , Shousei Yoshida , Hiroyuki Atarashi , Noriyuki Maeda
- Applicant: Yoshikazu Kakura , Shousei Yoshida , Hiroyuki Atarashi , Noriyuki Maeda
- Applicant Address: JP Tokyo JP Tokyo
- Assignee: NEC Corporation,NTT DoCoMo, Inc.
- Current Assignee: NEC Corporation,NTT DoCoMo, Inc.
- Current Assignee Address: JP Tokyo JP Tokyo
- Agency: Sughrue Mion, PLLC
- Priority: JP2003-119778 20030424
- International Application: PCT/JP2004/005996 WO 20040426
- International Announcement: WO2004/095749 WO 20041104
- Main IPC: H04B1/00
- IPC: H04B1/00
Abstract:
A radio transmitter-receiver wherein a pilot symbol is used in the transmitter that has undergone M-chip spreading on the frequency axis and N-chip spreading on the time axis by a spreading code of M×N chip length (where M and N are any integers equal to or greater than 2), and in the receiver, a spreading code that is not used in spreading said pilot signal is used as a despreading code to despread a received signal and then estimate noise and interference power. The spreading code that is used to spread the pilot symbol and the despreading code that is used in despreading are assigned so as to be orthogonal even if only in N chips on the time axis.
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