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David W Matolak

age ~62

from Chapin, SC

Also known as:
  • David William Matolak
Phone and address:
1234 Pet Sites Rd, Lake Murray, SC 29036
7407072915

David Matolak Phones & Addresses

  • 1234 Pet Sites Rd, Chapin, SC 29036 • 7407072915
  • 10 Banbury Dr, Athens, OH 45701 • 7405936270
  • 12820 Fantasia Cir, Herndon, VA 20170 • 7037330791
  • Salt Lake City, UT
  • Reading, MA
  • Charlottesville, VA
  • Sunderland, MA

Us Patents

  • Open Loop Timing Control For Synchronous Cda Systems

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  • US Patent:
    6810028, Oct 26, 2004
  • Filed:
    Sep 6, 2000
  • Appl. No.:
    09/656099
  • Inventors:
    Thomas R. Giallorenzi - Herriman UT
    David W Matolak - Athens OH
    Douglas G. Bowen - Spanish Fork UT
  • Assignee:
    L-3 Communications Corp. - New York NY
  • International Classification:
    H04B 7212
  • US Classification:
    370324, 370320, 370350, 375358, 455 132
  • Abstract:
    Method and apparatus for maintaining synchronization in a CDMA communication system by operating closed loop timing control between a radio base unit and subscriber units, operating open loop timing control between the radio base unit and the subscriber units, and using timing information derived from the open loop to correct the closed loop. Generally the open loop is faster in response than the closed loop. The open loop timing control may be generated by using GPS data. A radio base station and a subscriber unit operating in accordance with these principles.
  • Data Encryption By Nonlinear Transfer Function

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  • US Patent:
    7672453, Mar 2, 2010
  • Filed:
    Aug 21, 2000
  • Appl. No.:
    09/642373
  • Inventors:
    David William Matolak - Athens OH, US
  • Assignee:
    Lockheed Martin Corporation - Bethesda MD
  • International Classification:
    H04K 1/02
    H04L 9/06
  • US Classification:
    380 35, 380263, 380265
  • Abstract:
    A communication system includes an encryptor and a decryptor. For improved encryption security, the encryptor includes a multitap delay line to produce mutually delayed samples of the signal to be encrypted. Each sample is operated on by a key or function to produce modified signal samples, and the modified signal samples are summed or combined to produce the encrypted signal. According to one aspect of the invention, at least one of the keys or functions includes a nonlinear function. In some embodiments, the functions are time-variant for improved security. Decryption is accomplished in some embodiments by an equalizer. The preferred equalizer is the maximum-likelihood-sequence estimators matched to the encryption functions. A Viterbi algorithm makes it easy to implement the matched equalizer.
  • Spectrally Shaped Generalized Multitone Direct Sequence Spread Spectrum Modulation

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  • US Patent:
    7881361, Feb 1, 2011
  • Filed:
    Oct 31, 2005
  • Appl. No.:
    11/665697
  • Inventors:
    David W. Matolak - Athens OH, US
  • Assignee:
    Ohio University - Athens OH
  • International Classification:
    H04B 1/707
  • US Classification:
    375141, 375146, 375147
  • Abstract:
    A system () for communicating a direct sequence spread spectrum signal, a related transmitter (), a related receiver (), and methods associated therewith are provided in various embodiments. A data rate vector, a processing gain vector, a frequency separation vector, and a bit energy vector may be associated with transmitting and/or receiving a direct sequence spread spectrum signal. Each vector has a value associated with each of a plurality of channels associated with subcarriers in the direct sequence spread spectrum signal. A value for at least one of the data rate vector, processing gain vector, frequency separation vector, and bit energy vector for at least one channel is different from another value for the corresponding data rate vector, processing gain vector, frequency separation vector, or bit energy vector for another channel. Having one or more vectors with different values provides a spectrally-shaped generalized multitone (or multicarrier) direct sequence spread spectrum (SSG-MT-DS-SS) modulation scheme.
  • Data Transmission System With A Low Peak-To-Average Power Ratio Based On Distorting Frequently Occuring Signals

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  • US Patent:
    56510284, Jul 22, 1997
  • Filed:
    May 9, 1995
  • Appl. No.:
    8/437752
  • Inventors:
    Johnny Michael Harris - Centerville UT
    Thomas Robert Giallorenzi - Salt Lake City UT
    David William Matolak - Salt Lake City UT
    Dan Michael Griffin - Bountiful UT
  • Assignee:
    Unisys Corporation - Blue Bell PA
  • International Classification:
    H04L 2549
    H04L 2534
    H04B 1500
  • US Classification:
    375286
  • Abstract:
    An electronic data transmission system has a low peak-to-average power ratio by including a transmitter circuit which receives an input signal and in response generates a distorted output signal. This distorted output signal is generated such the output signal has a large magnitude when the input signal has a high probability of occurrence, and the output signal has a small magnitude when the input signal has a low probability of occurrence. The distorted output signal travels over a communication channel to a receiver circuit which regenerates the input signal by amplifying the distorted output signal with a gain that is the inverse of the gain by which the distorted signal is generated.
  • Data Transmisson System With A Low Peak-To-Average Power Ratio Based On Distorting Small Amplitude Signals

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  • US Patent:
    57937974, Aug 11, 1998
  • Filed:
    May 9, 1995
  • Appl. No.:
    8/437764
  • Inventors:
    Thomas Robert Giallorenzi - Salt Lake City UT
    David William Matolak - Salt Lake City UT
    Johnny Michael Harris - Centerville UT
    Robert William Steagall - North Salt Lake UT
    Bruce Howard Williams - Sandy UT
  • Assignee:
    Unisys Corporation - Blue Bell PA
  • International Classification:
    H04B 1500
    H04K 100
    H04L 2730
  • US Classification:
    375206
  • Abstract:
    An electronic data transmission system has a low peak-to-average power ratio by including a transmitter circuit which receives an input signal and in response generates a distorted output signal. This distorted output signal is generated by amplifying the input signal with one particular gain when the input signal is at a maximum magnitude which gives the distorted output signal a corresponding maximum magnitude, and by amplifying the input signal with a larger gain when the input signal is in a predetermined range below the maximum magnitude. The distorted output signal travels over a communication channel to a receiver circuit, which regenerates the input signal by amplifying the distorted output signal with a gain that is the inverse of the gain by which the distorted signal is generated.
  • Multi-User Acquisition Procedure For Multipoint-To-Point Synchronous Cdma Systems

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  • US Patent:
    58258353, Oct 20, 1998
  • Filed:
    Feb 23, 1996
  • Appl. No.:
    8/606285
  • Inventors:
    Samuel C. Kingston - Salt Lake UT
    Thomas R. Giallorenzi - Salt Lake UT
    Robert William Steagall - North Salt Lake UT
    David Matolak - Herndon VA
  • Assignee:
    L-3 Communications Corporation - New York NY
  • International Classification:
    H04L 700
  • US Classification:
    375367
  • Abstract:
    Disclosed are methods and apparatus for use in a synchronous CDMA communications system (10) that employs orthogonal pn spreading codes. The methods are intended for synchronizing transmissions from a subscriber unit (SU 14) to a radio base unit (RBU 12), and include the steps of: (a) transmitting individual ones of a plurality of bursts from the SU to the RBU, each burst being transmitted with a different pn spreading code timing alignment; (b) receiving individual ones of the plurality of bursts with the RBU and determining a power estimate of each received burst; and (c) in response to a determined power estimate of one of the bursts exceeding a threshold, sending a message from the RBU to the SU. The message indicates that the SU is to use for subsequent transmissions the pn spreading code timing alignment that was employed when transmitting the burst that exceeded the threshold. In a preferred embodiment of this invention the step of transmitting transmits an indication of the pn spreading code timing alignment used when transmitting a given one of the bursts.
  • Multi-User Acquisition Procedure For Point-To-Multipoint Synchronous Cdma Systems

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  • US Patent:
    59035510, May 11, 1999
  • Filed:
    Jan 12, 1998
  • Appl. No.:
    9/005938
  • Inventors:
    Samuel C Kingston - Salt Lake City UT
    Thomas R. Giallorenzi - Salt Lake City UT
    Randal R Sylvester - West Valley City UT
    David W Matolak - Salt Lake City UT
    Patrick J Smith - Salt Lake City UT
  • Assignee:
    L-3 Communications Corporation - New York NY
  • International Classification:
    H04B7/216
  • US Classification:
    370335
  • Abstract:
    Disclosed are methods for acquiring a forward channel in a point-to-multipoint CDMA system. One method includes the steps of (a) despreading a received CDMA signal with a first pn code that is known to be present in the received CDMA signal and obtaining a first measure of received signal level; (b) despreading the received CDMA signal with a second pn code that is known not to be present in the received CDMA signal and obtaining a second measure of received signal level; and (c) synchronizing to a desired channel using a difference between the first and second signal levels. In this method the first step of despreading despreads a continuously transmitted side-channel, and the step of synchronizing synchronizes to the side-channel. Also, the step of obtaining a first measure of received signal level obtains a correlation peak, and the step of obtaining a second measure of received signal level obtains a correlation null. Preferably, the steps of despreading and obtaining are accomplished iteratively over a range of n first pn code phase states and over a range of n second pn code phase states.
  • Multi-User Acquisition Procedure For Point-To-Multipoint Synchronous Cdma Systems

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  • US Patent:
    58055843, Sep 8, 1998
  • Filed:
    Feb 23, 1996
  • Appl. No.:
    8/606378
  • Inventors:
    Samuel C. Kingston - Salt Lake City UT
    Thomas R. Giallorenzi - Salt Lake City UT
    Randal R. Sylvester - West Valley City UT
    David W. Matolak - Herndon VA
    Patrick J. Smith - Salt Lake City UT
  • Assignee:
    L-3 Communications Corporation - New York NY
  • International Classification:
    H04B 7216
    H04J 306
  • US Classification:
    370342
  • Abstract:
    Disclosed are methods for acquiring a forward channel in a point-to-multipoint CDMA system. One method includes the steps of (a) despreading a received CDMA signal with a first pn code that is known to be present in the received CDMA signal and obtaining a first measure of received signal level; (b) despreading the received CDMA signal with a second pn code that is known not to be present in the received CDMA signal and obtaining a second measure of received signal level; and (c) synchronizing to a desired channel using a difference between the first and second signal levels. In this method the first step of despreading despreads a continuously transmitted side-channel, and the step of synchronizing synchronizes to the side-channel. Also, the step of obtaining a first measure of received signal level obtains a correlation peak, and the step of obtaining a second measure of received signal level obtains a correlation null. Preferably, the steps of despreading and obtaining are accomplished iteratively over a range of n first pn code phase states and over a range of n second pn code phase states.

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