发明名称 |
Signaling method in an OFDM multiple access system |
摘要 |
A method for reducing the peak-to-average ratio in an OFDM communication signal is provided. The method includes defining a constellation having a plurality of symbols, defining a symbol duration for the OFDM communication signal, and defining a plurality of time instants in the symbol duration. A plurality of tones are allocated to a particular communication device, and a discrete signal is constructed in the time domain by mapping symbols from the constellation to the time instants. A continuous signal is generated by applying an interpolation function to the discrete signal such that the continuous signal only includes sinusoids having frequencies which are equal to the allocated tones. |
申请公布号 |
US9426012(B2) |
申请公布日期 |
2016.08.23 |
申请号 |
US201213619460 |
申请日期 |
2012.09.14 |
申请人 |
QUALCOMM Incorporated |
发明人 |
Laroia Rajiv;Li Junyi;Uppala Sathyadev Venkata |
分类号 |
H04L27/26;H04L5/02 |
主分类号 |
H04L27/26 |
代理机构 |
|
代理人 |
Dong Dalei |
主权项 |
1. A processor-based apparatus for generating wireless communications, the processor-based apparatus comprising:
a first circuit configured to perform a Discrete Fourier Transform (DFT) on a discrete signal of complex data symbols to obtain a first frequency response vector of length M; a second circuit configured to perform an N-point Inverse DFT (IDFT) on a second frequency response vector of length N to obtain a vector of digital signal samples, wherein the second frequency response vector is generated from the first frequency response vector and the second frequency response vector has entries corresponding to one or more groups of tones allocated to the processor-based apparatus and zero value symbols corresponding to tones not allocated to the processor-based apparatus; and a third circuit configured to generate a low peak-to-average orthogonal frequency division multiplexing (OFDM) signal representing the vector of digital signal samples for transmission. |
地址 |
San Diego CA US |