Invention Grant
- Patent Title: Single sideband and quadrature multiplexed continuous phase modulation
- Patent Title (中): 单边带和正交多路连续相位调制
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Application No.: US12385468Application Date: 2009-04-09
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Publication No.: US07920637B2Publication Date: 2011-04-05
- Inventor: John P. Fonseka , Eric Morgan Dowling
- Applicant: John P. Fonseka , Eric Morgan Dowling
- Agent Eric M. Dowling
- Main IPC: H04L23/02
- IPC: H04L23/02

Abstract:
A class of bandwidth reduction techniques are used develop a broad class of modulation types collectively called SSB-FM. These signals can be used to construct communication systems that provide bandwidth-normalized performance gains of 10 dB or more when compared to popular prior art modulation methods. An aspect of the invention involves mapping trellis paths in a complex signal space onto corresponding real-valued trellis signals with desirable spectral properties. The invention can be used map continuous phase modulated (CPM) signals onto simpler amplitude-modulated trellis signals having double the channel capacity of prior art CPM signals. Multi-amplitude signaling and frequency division multiplexing may also be incorporated to further accommodate more information per symbol.
Public/Granted literature
- US20090279422A1 Single sideband and quadrature multiplexed continuous phase modulation Public/Granted day:2009-11-12
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