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 for testing multi-chip stacked packages
Aqueous flowable concentrate compositions of a microencapsulated dinitroaniline herbicide
Methods and arrangements for realising betting with off-line terminal
Cooler
Clock phase recovery apparatus
Drive coil, measurement probe comprising the drive coil and methods utilizing the measurement probe
High voltage circuit for electrical stimulation
  Randomly Featured Patents
In-line skate frame protector
Compositions, systems, and methods for imaging
Method for telecommunications service-to-service asynchronous communications using a context cache
Process for obtaining high-purity tricyclohexyl tin hydroxide on a high-yield basis
Semiconductor memory with built-in parallel bit test mode
Method of forming a cadmium telluride/silicon structure
Heating control system for a screed
Faucet for water purifier
Disposable syrup package having integral disposable valve assembly
Process for producing organic sulfur acids or salts thereof