Resources Contact Us Home
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
Methods and system for providing drug pricing information from multiple pharmacy benefit managers (PBMs)
Method for delivering a volatile material
Semiconductor device having vertical channel
Geo-coding images
Modular utility rack
Assigning runtime artifacts to software components
Optical sensor and electronic apparatus
  Randomly Featured Patents
Thiophene derivatives
Medical device for navigation through anatomy and method of making same
Network traffic classification using subspace clustering techniques
Method of producing a flat, reinforced article with micro-openings
Apparatus and method for moving a substrate
Maleimido group containing monomers
Apparatus and methods for charged-particle-beam microlithography exhibiting reduced four-fold aberrations
Method and device for monitoring the alignment of a measuring instrument, and measuring instrument
Self-cleaning inlet screen to an ocean riser pipe
Apparatus and method for providing VoIP service based on IP multimedia subsystem