Invention Grant
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
- Patent Title: Efficient employment of digital upsampling using IFFT in OFDM systems for simpler analog filtering
- Patent Title (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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Application No.: US11373001Application Date: 2006-03-09
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Publication No.: US09042461B2Publication Date: 2015-05-26
- Inventor: Raghuraman Krishnamoorthi , Fuyun Ling , Rajiv Vijayan
- Applicant: Raghuraman Krishnamoorthi , Fuyun Ling , Rajiv Vijayan
- Applicant Address: US CA San Diego
- Assignee: QUALCOMM Incorporated
- Current Assignee: QUALCOMM Incorporated
- Current Assignee Address: US CA San Diego
- Agency: Norton Rose Fulbright US LLP
- Main IPC: H04N7/18
- IPC: H04N7/18 ; H04L27/26
Abstract:
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.
Public/Granted literature
- US20060215540A1 Efficient employment of digital upsampling using IFFT in OFDM systems for simpler analog filtering Public/Granted day:2006-09-28
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