The United States of America as represented by the Secretary of the Navy - Washington DC
International Classification:
G01S 1500
US Classification:
367103
Abstract:
A device is provided for processing an echo received by an array of N receiving elements from a target at range R ensonified by an LFM signal of bandwidth B transmitted for a duration T. The device receives each elements output f. sub. n (t) over the elements total receiving time and selects time window element outputs f'. sub. n (t), which are discrete portions of f. sub. n (t), each time window extending from an arbitrary initial time T. sub. 0 to time T. sub. f and is spaced from T. sub. 0 no more than T and, if there is a target within the window, an echo is received at time T. sub. n. Further the device produces element frequency difference outputs g. sub. n (t) from the frequency difference between a replica of at least a portion of the transmitted LFM signal and the time window element outputs f'. sub. n (t), the outputs g. sub. n (t) being tones with frequencies directly proportional to the time T. sub.
Dual-Frequency Receiving Array Using Randomized Element Positions
The United States of America as represented by the Secretary of the Navy - Washington DC
International Classification:
G01S 380
US Classification:
367119
Abstract:
An array for receiving wave energy at a pair of widely spaced frequencies has receiving elements arranged to function as a half-wave array for the lower frequency and as a random array for the higher frequency. A plurality of receiving elements are arranged in an array with the receiving elements having nominal positions spaced apart such that spacing between adjacent nominal positions is approximately one half the wavelength. lambda. of the wave having the lower frequency. The receiving elements are randomly distributed about their respective nominal positions with each receiving element being within a distance of. epsilon. lambda. sub. o of its corresponding nominal position where. epsilon. is a randomization parameter and. lambda. sub. o is the wavelength of the higher frequency wave.
Preprocessor And Adaptive Beamformer For Active Signals Of Arbitrary Waveform
The United States of America as represented by the Secretary of the Navy - Washington DC
International Classification:
G01S 316 G01S 1500
US Classification:
342378
Abstract:
A pre-processor and adaptive beamformer processes an echo received by an array of receiving elements from a distant target from a transmitted signal having an arbitrary waveform capable of being represented as a complex modulation of a carrier frequency. Time blocks are formed from each element output represented by a series of time windows extending from an initial time appropriate to the arrival time of the echo to a final time appropriate to the time block. A correlation is performed of each time block with a replica of the transmitted signal. The correlation products are aligned with respect to time difference to within one sample period. The beamformer further aligns the correlation products with respect to time difference to substantially the same phase for each steering direction. Covariance estimates are formed using techniques of spatial averaging to generate adaptive weights optimized to suppress interfering signals without requiring the use of time averaging.
Wikipedia References
James Lockwood
Skills & Activities:
Sport:
Dewsbury Rams player • Featherstone Rovers player • Rugby league prop • Rugby league second-row • Club
Eufaula Internal Medicine 23 Veteran Blvd, Eufaula, AL 36027 (334)6878051 (phone), (334)6870470 (fax)
Education:
Medical School University of Alabama School of Medicine Graduated: 1982
Languages:
English
Description:
Dr. Lockwood graduated from the University of Alabama School of Medicine in 1982. He works in Eufaula, AL and specializes in Internal Medicine.
Name / Title
Company / Classification
Phones & Addresses
James E. Lockwood
Ballatore Associates, A California Limited Partnership
11770 Bernardo Plz Ct, San Diego, CA 92128
James E. Lockwood
El Norte Associates, A California Limited Partnership
12725 Stone Cyn Rd, Poway, CA 92064
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James Lockwood
Work:
BWBR - Brand Communications Manager (2010) City of Saint Paul Mayor's Office - Deputy Communications Director (2008-2010) Children's Hospitals and Clinics of Minnesota - Communications and Media Relations Specialist (2002-2007)
Education:
University of Minnesota - Masters of Public Affairs, Murray State University - Journalism
About:
I am one of those fortunate people who enjoys what I do and where I get to do it. I work for BWBR, a design solutions firm providing architectural, interior design, and planning services. More than de...
Bragging Rights:
Raised in the South, loving winters in the Upper Midwest, and proud to be part of both worlds. Love cycling (Cat 2 licensed racer), indy music and jazz, photography, and great food
James Lockwood
Work:
James Lockwood Shirtmaker Co. Ltd. - General Manager