Patent ID: 7577165
Filing Date: 2009-08-18
Classification: H04L

Abstract:
1. A method for increasing an effective communications channel bandwidth beyond that of a constrained physical bandwidth, and thereby increasing a spectral efficiency and a data rate of a channel, and/or a power efficiency of the channel, by orthogonal signal spectrum overlay (OSSO) comprising the steps of: decomposing a time-bandwidth product (TBP) of a given symbol in a data stream transmitted by a transmitter through a given physical bandwidth; and non-linearly expanding said TBP in terms of an orthogonally overlaid signal basis set constituting eigensignals of said symbol such that the eigensignals resulting from decomposition and non-linear expansion of said TBP of said symbol are overlaid in both time and frequency domains and occupy a same physical space, wherein the number of orthogonal signals obtained in a specific symbol is set by the size of the TBP of the symbol.