Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Maximizing power and spectral efficiencies for layered and conventional modulations










Image Number 19 for United States Patent #8130818.

Methods and apparatuses for maximizing power and spectral efficiencies in a wireless communication system are disclosed. The invention is particularly useful for layered modulation applications because power levels for such applications are relatively high. A layered modulation signal comprises an upper and a lower layer signal that interfere with each other within the same frequency band such that the upper layer signal can be demodulated directly from the layered modulation signal, and the lower layer signal can be demodulated after subtracting the first layer signal from the layered modulation signal. The invention applies one or more of the following four signal schemes in a communication signal including varying the symbol rate (rather than the code rate), reducing or eliminating the guard band, reducing excess signal bandwidth and employing layered modulation within the guard band of the legacy signal.








 
 
  Recently Added Patents
Method and apparatus for sharing virtual workspaces
Wheel
Using sets of OTDR receive fibers with different lengths of marker events to verify optical fiber connectivity
Domain isolation through virtual network machines
Methods of saccharification of polysaccharides in plants
Synchronization of sound generated in binaural hearing system
Automated processing machine used for processing samples placed on slides and having an output device
  Randomly Featured Patents
Methods of fabricating a semiconductor device using a selective epitaxial growth technique
Genetic transformation of algal and cyanobacteria cells by microporation
Fabric softening compositions with dye transfer inhibitors for improved fabric appearance
Image forming apparatus
Scissors
Active low noise fan assembly
Method of reducing the NO.sub.x content in combustion gases
Vehicle bumper assemblies and associated towing assemblies
Method and apparatus for examining ovary and diagnosing the presence of pregnancy in mammals
Mobile communication terminal and method of accomplishing TPC in mobile communication terminal