专利检索 ap:("QUALCOMM Flarion Technologies, Inc.") AND inv:"LING, Fuyun" 第 1 页

1.

发明公开
EFFICIENT EMPLOYMENT OF DIGITAL UPSAMPLING USING IFFT IN OFDM SYSTEMS FOR SIMPLER ANALOG FILTERING 审中-公开
标题翻译：有效地使用数字采样的通过IFFT OFDM系统中更容易的模拟滤波

公开(公告)号：EP1856875A1

公开(公告)日：2007-11-21

申请号：EP06738056.8

申请日：2006-03-10

申请人： QUALCOMM Flarion Technologies, Inc.

发明人： KRISHNAMOORTHI, Raghuraman , LING, Fuyun , VIJAYAN, Rajiv

IPC分类号： H04L27/26

CPC分类号： H04L27/2644

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. Ih another embodiment, the NL point IFFT is further optimized by exploiting the fact that (N-I) 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.