Title:
NUMERICAL CONTROL OF SIDEBAND ENERGY AND MODULATION COMPRESSION METHOD FOR THE RADIO FREQUENCY TRANSMISSION OF HIGH SPEED DATA
Document Type and Number:
WIPO Patent Application WO2006014535
Kind Code:
A3
Abstract:
A bandwidth control of sideband energy and compression method applied to the integer cycle methods of modulation, is now disclosed called X padding. Radio Frequency (RF) sine waves are grouped into frames of N cycles (divide-by ratio) where N is a variable power of 2 (i.e. 2, 4, 8, 16, 32, 64, 128, 256, 512, etc). This system is flexible wherein N can equal any one of these values. In the frame of N cycles, two alternate cycles are changed to the modulating frequencies. The other cycles remain precisely at the carrier frequency. The position of the alternate modulated cycles in a frame of N-cycles determines the exact binary bits that are being transmitted. This means that by sending only one modulation event where N =16, four (4) bits are transferred. For example, in a frame of 16 cycles (i.e. N =16) where the positions of the alternate modulated cycle is 6, then the four binary bits of information transmitted are 0110. X padding is used to set the pulse repetition rate to fit particular Power Spectrum Density (PSD) needs. This is done by inserting X number of un-modulated RF cycles to the beginning and to the end of the N Frame.
Inventors:
BOBIER JOSEPH (US)
Application Number:
PCT/US2005/024077
Publication Date:
December 14, 2006
Filing Date:
July 07, 2005
Export Citation:
Assignee:
XG TECHNOLOGY LLC (US)
International Classes:
H04B1/02
Foreign References:
| US5789991A | 1998-08-04 | |||
| US5920253A | 1999-07-06 | |||
| US6656849B2 | 2003-12-02 | |||
| US5528621A | 1996-06-18 | |||
| US5828270A | 1998-10-27 | |||
| US5624380A | 1997-04-29 |
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