Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Least mean square (LMS) normalizer for active sonar










Image Number 7 for United States Patent #5349567.

A normalizer based on a Least Mean Square (LMS) adaptive algorithm configured to provide effective normalization when the background noise is locally non-stationary and when the target may be subject to time spread of unknown extent. The LMS algorithm used in the normalizer includes an adaptive filter in both the primary and reference inputs as a means of adapting to variations in both the signal and noise statistics. The LMS algorithm is implemented on the logarithm of the data, so that the difference minimized in the LMS structure drives the ratio of the signal power to noise power to a constant value. The algorithm can be used as a range normalizer by running it over range in each doppler bin, or as a frequency normalizer by operating across doppler in each range bin. By continually adapting to the statistics present in the data, the normalizer more effectively deals with the variations in the noise and signal statistics.








 
 
  Recently Added Patents
Chitosan hydrogel derivatives as a coating agent with broad spectrum of antimicrobial activities
Methods and apparatus for determining a phase error in signals
Nuclear reactor building and construction method thereof
Semiconductor memory device, method of controlling read preamble signal thereof, and data transmission method
Method and system for monitoring service quality in a mobile node
Apparatus for electrographic printing or copying
Cable preparation tool
  Randomly Featured Patents
Virtual sport instruction
Producer gas reservoirs for cyclic char fuel oxidation reactors
Multifunctional pocket tool
Spectrum surveillance receiver system
Thermal atherectomy device
Integrated circuit, semiconductor device comprising the same, electronic device having the same, and driving method of the same
Bird feeder
Protocol for communication between access ports and wireless switches
Wind power converter
Interest determination for auditory enhancement