Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
System and method for adaptive bit loading source coding via vector quantization










Image Number 5 for United States Patent #7408998.

A communication system includes a data transmitter and a data receiver in which the data transmitter transmits data using a multicarrier modulation, such as an OFDM modulation technique. The data receiver determines a predetermined level of modulation for at least one carrier of the multicarrier modulation corresponding to a received signal-to-noise ratio for the carrier using a vector quantization technique. The predetermined level of modulation for each carrier is based on an index to a codeword in a codebook corresponding to the signal-to-noise ratio for the carrier. The index to the codeword is a nearest neighbor to a vector corresponding to the signal-to-noise ratio for the carrier, and the codeword for each predetermined level of modulation is determined based on an adaptive-bit-loading technique. The data receiver transmits the index to the codeword for each carrier to the data transmitter in order to update the modulation at the data transmitter.








 
 
  Recently Added Patents
Data storage device with surface ornamentation
Registry key federation systems and methods
Contactless electrical connector for an induction sensor, and sensor including such a connector
Method and system for acquiring support capability of mobile terminal by base station side system
Universal data-driven computer proxy
Decontamination apparatus and method
Food safety printer
  Randomly Featured Patents
Seat belt device having seat belt retractor with lock mechanism
System and method for determining directionality of sound detected by a hearing aid
Method for forming isolated semiconductor structures
Dahlia plant named `HS Wink`
System and method for individualized broadcasts on a general use broadcast frequency
Method for ranking hyperlinked pages using content and connectivity analysis
Floribunda rose plant named `JACsim`
Continuous sampling and dilution system and method
Recombinant helicoverpa baculoviruses expressing heterologous DNA
Vehicle roof mounted air conditioner cowling