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
Wrench head
Method and apparatus for controlled reoxygenation
Coating composition, and a process for producing the same
Determination method for a reinitialization of a temporal sequence of fluoroscopic images of an examination region of an examination object
Point-of-sale cart
Information processing apparatus and power supply controlling method
Process for producing polyols
  Randomly Featured Patents
Golf swing evaluation system
Method and device for reproduction of information
Rotary printing machine with blanket cylinders and plate or form cylinders integrated in pairs in cylinder groups
Multiple purpose woodworking structure
Light emitting panel assemblies
Information storage medium and information recording/playback system
Electrochromic device
Process for preparing veterinary acellular vaccines against gram-negative nonenteric pathogenic bacilli
Method for weaving substrates with integral sidewalls
Expansion valve of refrigerating cycle consisting of capacity variable compressor