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
Metal foil laminate, substrate for mounting LED, and light source device
Semiconductor device
Method for combining images and magnetic resonance scanner
Performing failover for a plurality of different types of videoconferencing devices
Multi-level integrated circuit, device and method for modeling multi-level integrated circuits
Vehicle running control system
Adaptive analog echo/next cancellation
  Randomly Featured Patents
Integrated toner transport/toner charging device
Reflex training and improvement system
Method for displaying selected text processing task options corresponding to the contents of the combined program diskette
Method of handing off and a wireless communication device
Compact disk holder with labels
Touch controlled multiple position lamp
Process for manufacturing an .alpha..alpha.'-diaminoalcohol
Synthetic hydrophilic membranes and method for their manufacture
Foundry sand mixes with improved bench life for curing with sulfur dioxide or other oxidizable gaseous catalysts
Flat screen television wall mount bracket