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
Rate controlled first in first out (FIFO) queues for clock domain crossing
Parallel power inverter motor drive system
Method and system for providing cloud based network security services
Method of creating exercise routes for a user and related personal navigation device
Changing sound alerts during a messaging session
Managing a spinlock indicative of exclusive access to a system resource
Silicone hydrogel, lens for eye and contact lens
  Randomly Featured Patents
Transmission and detection of data in a dual channel transceiver
Selectively protecting a register file
Use of phosphocholine hapten conjugates in vaccines
Multiple lead analog voltage probe with high signal integrity over a wide band width
Base for a food container
Differential pair inversion for reduction of crosstalk in a backplane system
Multi-level routing structure for a programmable interconnect circuit
Cutting machine with environment control arrangement
Method of dispatching an elevator car including an expected arrival time of a passenger near an elevator car
Chair support connector for a rocking chair