发明授权
- 专利标题: Enhanced frequency domain spreading
- 专利标题(中): 增强频域扩展
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申请号: US11772092申请日: 2007-06-29
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公开(公告)号: US07983356B2公开(公告)日: 2011-07-19
- 发明人: Rabih Chrabieh , Samir S. Soliman
- 申请人: Rabih Chrabieh , Samir S. Soliman
- 申请人地址: US CA San Diego
- 专利权人: QUALCOMM, Incorporated
- 当前专利权人: QUALCOMM, Incorporated
- 当前专利权人地址: US CA San Diego
- 代理机构: QUALCOMM Patent Group
- 代理商 James H. Yancey, Jr.; Jeff Jacobs
- 主分类号: H04L27/00
- IPC分类号: H04L27/00 ; H04J11/00
摘要:
A system and method are provided for using frequency domain spreading to generate real signals in the time domain. The method supplies a first complex frequency domain symbol (α) and a second complex frequency domain symbol (αi), and maps (α+jαi) onto a subcarrier (+f). Further, (α−jαi)* is mapped onto a mirror subcarrier (−f). The mappings are converted into a complex time domain symbol carrying α and jαi in a single inverse fast Fourier transformation (IFFT). The real component of the complex time domain symbol (α) is initially supplied, and subsequently supplied is an imaginary component of the complex time domain symbol (αi). The real symbol component (α) is supplied by carrying α on the subcarrier (+f), and carrying (α)* on the mirror subcarrier (−f). The imaginary symbol component αi is supplied by carrying αi on the subcarrier (+f), and carrying (αi)* on the mirror subcarrier (−f).
公开/授权文献
- US20090004984A1 ENHANCED FREQUENCY DOMAIN SPREADING 公开/授权日:2009-01-01
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