Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Variable baud rate demodulator










Image Number 4 for United States Patent #6282248.

A method of efficiently demodulating and isolating a signal within a fixed possibly wider band spectral region, having any of a wide range of baud rates. The signal is sampled at a fixed, first frequency which remains fixed no matter what the baud rate. Thus, the sample rate does not necessarily correspond to the desired baud rate. The sampled signal is then demodulated and low pass filtered to create baseband samples at the first frequency, which are then subject to user-specified arbitrary rate change in a continuously variable interpolator/decimator (continuously variable digital delay (CVDD) device), and decimated by a programmable power of 2, to produce samples at a second frequency. The second frequency is preferably determined to be a whole number multiple of the desired baud rate, e.g., twice the desired baud rate. The samples are equalized to produce output symbols at the target baud rate. Based on this method, a demodulator can receive signals of varying bandwidth and baud rates at arbitrary spectral locations within a possibly wider bandwidth aggregate channel span, and can adapt its target baud rate for each signal to be the actual baud rate of the derived incoming data signal within the possibly wider bandwidth aggregate channel span.








 
 
  Recently Added Patents
Temporary protective cover for an exposed junction box
Tracking data eye operating margin for steady state adaptation
Image forming apparatus
System and method for deriving cell global identity information
Document layout method
Organizer
Method and system for parallelizing data copy in a distributed file system
  Randomly Featured Patents
Spray drying of macromolecules to produce inhaleable dry powders
General input/output architecture, protocol and related methods to implement flow control
System and method for analyzing risk
Safety glasses
Method of manufacturing film carrier
Portable pipe testing apparatus
Method and apparatus for measuring deviations from flatness
One-piece partition
Coin operated article dispensing mechanism
Accumulator