发明名称 |
AN ADAPTIVE AIR INTERFACE WAVEFORM |
摘要 |
In one embodiment, a method for generating an adaptive air interface waveform includes generating a waveform that includes a variable carrier frequency and variable bandwidth signal. The variable bandwidth signal includes one or more subcarriers that are dynamically placeable over a range of frequencies, and each subcarrier is separately modulated according to a direct sequence (DS) spread spectrum (SS) technique. The waveform has an embedded pilot usable to optimize one or more spectrum efficiencies of the waveform. A modulation constellation, a code rate, and a code length of the generated waveform are adapted according to an available spectrum and one or more sub-carrier conditions.
|
申请公布号 |
WO03092212(A1) |
申请公布日期 |
2003.11.06 |
申请号 |
WO2003US13065 |
申请日期 |
2003.04.24 |
申请人 |
RAYTHEON COMPANY |
发明人 |
BREZDIVIN, ROBERTO;SEIDEL, SCOTT, Y.;TOPP, ALLAN, R.;BREINIG, ROBERT, J. |
分类号 |
H03M13/11;H03M13/25;H04L1/00;H04L5/02;H04L27/26;(IPC1-7):H04L1/00 |
主分类号 |
H03M13/11 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|