发明授权
US09042461B2 Efficient employment of digital upsampling using IFFT in OFDM systems for simpler analog filtering
有权
在OFDM系统中有效利用使用IFFT的数字上采样进行更简单的模拟滤波
- 专利标题： Efficient employment of digital upsampling using IFFT in OFDM systems for simpler analog filtering
- 专利标题（中）： 在OFDM系统中有效利用使用IFFT的数字上采样进行更简单的模拟滤波
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申请号： US11373001申请日： 2006-03-09
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公开(公告)号： US09042461B2公开(公告)日： 2015-05-26
- 发明人: Raghuraman Krishnamoorthi , Fuyun Ling , Rajiv Vijayan
- 申请人： Raghuraman Krishnamoorthi , Fuyun Ling , Rajiv Vijayan
- 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： Norton Rose Fulbright US LLP
- 主分类号： H04N7/18
- IPC分类号： H04N7/18 ; H04L27/26
摘要：
Systems and methods are provided for transmitting OFDM information via IFFT up-sampling components that transmit data at a higher sampling rate than conventional systems to simplify filter requirements and mitigate leakage between symbols. In one embodiment, an NL point IFFT is performed on a zero inserted set of frequency domain symbols. In another embodiment, the NL point IFFT is further optimized by exploiting the fact that (N−1) L of the frequency domain symbols are zero. This enables an embodiment that consists of a pre-processor that multiplies the input samples by complex phase factors, followed by L point IFFTs.
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