Troy G Schaffer

age ~62

from Allentown, PA

Also known as:
  • Troy R
Phone and address:
873 Wahneta St, Allentown, PA 18109
6104350667

Troy Schaffer Phones & Addresses

  • 873 Wahneta St, Allentown, PA 18109 • 6104350667
  • Northampton, PA
  • Bath, PA

Work

  • Company:
    Ocs logistics
    Oct 2008
  • Position:
    Warehouse associate

Education

  • School / High School:
    Dieruff- Allentown, PA
    1998
  • Specialities:
    GED in general

Resumes

Troy Schaffer Photo 1

Troy Schaffer Allentown, PA

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Work:
OCS logistics

Oct 2008 to 2000
warehouse associate
Education:
Dieruff
Allentown, PA
1998 to 2000
GED in general

Us Patents

  • Adaptive Equalizer With Decision Directed Constant Modulus Algorithm

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  • US Patent:
    6337878, Jan 8, 2002
  • Filed:
    Mar 3, 1999
  • Appl. No.:
    09/261843
  • Inventors:
    Thomas J Endres - Pipersville PA
    Samir N Hulyalkar - Plainsboro NJ
    Christopher H Strolle - Glenside PA
    Troy A Schaffer - Langhorne PA
  • Assignee:
    Nxt Wave Communications - Langhorne PA
  • International Classification:
    H03H 740
  • US Classification:
    375229, 375232, 375346, 375350, 708322, 708323
  • Abstract:
    An adaptive equalizer for use in blind equalization systems to compensate for transmission channel distortion and noise in a digital communication system quantizes the input signal samples to generate a quantized implementation of the Constant Modulus Algorithm (CMA). To quantize the input signal samples, a nearest-element decision device (a slicer), that is typically present in a digital receiver, is used to pre-compute the quantized CMA error function. The number of unique values for the CMA error term is thereby reduced, and the reduced number of CMA error term values are stored in a lookup table. By greatly reducing the number of received signal values used in the CMA error calculation a relatively small lookup table can be used to compute the CMA error function. Passband implementation is accommodated by incorporating the signal de-rotation factor into the lookup table entries. In one embodiment the CMA multiply operation is replaced with shifts and adders.
  • Adaptive Equalizer With Enhanced Error Quantization

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  • US Patent:
    6418164, Jul 9, 2002
  • Filed:
    Jan 14, 1999
  • Appl. No.:
    09/231888
  • Inventors:
    Thomas J Endres - Perkasie PA
    Samir N Hulyalkar - Plainsboro NJ
    Christopher H Strolle - Glenside PA
    Troy A Schaffer - Langhorne PA
  • Assignee:
    Nxtwave Communications, Inc. - Langhorne PA
  • International Classification:
    H03H 2100
  • US Classification:
    375232, 375233, 375235, 375243, 375285, 708323, 455204, 348607
  • Abstract:
    An adaptive equalizer for use in blind equalization systems to compensate for transmission channel distortion and noise in a digital communication system uses multiple quantization levels for implementation of the Constant Modulus Algorithm (CMA). Different quantization levels are used in different regions of the CMA error function for both passband and baseband equalizers. In one embodiment, a quantizer with a step rise having logarithmic scale is used to digitize the CMA error function. In particular, a quantizer with a step rise in which each level of the quantizer step rise is a power of 2 is used to digitize the CMA error function. In another embodiment, a quantizer with a step rise in which each level of the quantizer step rise is the sum of two or more logarithmic scales is used to digitize the CMA error function. In particular, a quantizer with a step rise wherein each level of the quantizer step rise is the sum of two or more numbers each of which is a power of 2 is used to digitize the CMA error function. The use of logarithmic scales, the sum of logarithmic scales, powers of 2, or the sum of powers of 2 for the quantizer step rise size to digitize the CMA error function make efficient use of shift and add operations to achieve multiplication in the adaptation process.
  • Reduced Complexity Equalizer For Multi Mode Signaling

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  • US Patent:
    6426972, Jul 30, 2002
  • Filed:
    Jun 19, 1998
  • Appl. No.:
    09/100705
  • Inventors:
    Thomas J. Endres - Perkasie PA
    Samir N. Hulyalkar - Bensalem PA
    Troy A. Schaffer - Langhorne PA
    Christopher H. Strolle - Glenside PA
  • Assignee:
    NxtWave Communications - Langhorne PA
  • International Classification:
    H03H 730
  • US Classification:
    375229, 375233
  • Abstract:
    A transmission channel equalizer system may be used to process either signals that have been modulated according to quadrature amplitude modulation (QAM) or vestigial sideband modulation (VSB) to convey digital symbols. The equalizer system includes a sparse digital filter having coefficients which are adaptively updated. The filter system includes a finite impulse response (FIR) filter which processes modulated pass-band RF signals and an infinite impulse response (IIR) filter which processes demodulated base-band signals. At least one of the FIR and IIR filters is implemented as a sparse filter. The filter system is responsive to a control signal to switch between processing QAM and VSB signals. The update algorithm for the equalizer employs a constant modulus algorithm (CMA) to acquire the digital signal and a decision directed (DD) algorithm to track the digital signal. The CMA algorithm used when VSB signals are processed is a single axis CMA (SACMA) algorithm.
  • Equalizer Method And Apparatus Using Constant Modulus Algorithm Blind Equalization And Partial Decoding

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  • US Patent:
    6668014, Dec 23, 2003
  • Filed:
    Dec 9, 1999
  • Appl. No.:
    09/457496
  • Inventors:
    Thomas J Endres - Pipersville PA
    Samir N Hulyalkar - Plainsboro NJ
    Christopher H Strolle - Glenside PA
    Troy A Schaffer - Langhorne PA
    Raul A Casas - Doylestown PA
    Stephen L Biracree - Jamison PA
    Anand M Shah - Pendel PA
  • Assignee:
    ATI Technologies Inc. - Ontario
  • International Classification:
    H03K 5159
  • US Classification:
    375232, 375341, 375287, 375224, 375265, 375229, 375346, 375350, 375233, 375340, 714796, 714786, 714792, 714794, 714795, 708322, 708323
  • Abstract:
    A digital communication receiver includes a blind equalizer using the Constant Modulus Algorithm (CMA) to compensate for channel transmission distortion in digital communication systems. Improved CMA performance is obtained by using a partial trellis decoder to predict 1 bit or 2 bits of the corresponding 3-bit transmitted symbol. The predicted bits from the partial trellis decoder are used to reduce the effective number of symbols in the source alphabet, which reduces steady state jitter of the CMA algorithm. Specifically, the received input signal to the CMA error calculation is shifted up or down by a computed delta (), in accordance with the predicted bit(s). In addition, a different constant gamma (), for the CMA error calculation is selected in accordance with the predicted bit(s). The disclosed technique is applicable to trellis and non-trellis codes in which at least one bit of the present symbol can be predicted in advance and used to reduce the effective number of symbols in the source alphabet.
  • Hybrid Soft And Hard Decision Feedback Equalizer

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  • US Patent:
    7006565, Feb 28, 2006
  • Filed:
    Apr 14, 2000
  • Appl. No.:
    09/549368
  • Inventors:
    Thomas J Endres - Pipersville PA, US
    Samir N Hulyalkar - Plainsboro NJ, US
    Christopher H Strolle - Glenside PA, US
    Troy A Schaffer - Langhorne PA, US
    Anand M Shah - Yardley PA, US
  • Assignee:
    ATI Technologies Inc. - Ontario
  • International Classification:
    H03H 21/00
  • US Classification:
    375233, 375229, 375232, 708322, 708323
  • Abstract:
    An equalizer for use in a communication receiver includes an infinite impulse response (IIR) feedback filter operated in acquisition and tracking feedback modes on a sample by sample basis to form a hybrid Decision Feedback Equalizer (DFE) architecture. In acquisition mode, soft decision samples from the filtered received signal are input to the IIR filter. In the tracking mode, hard decision samples from a slicer are input to the IIR filter. Acquisition and tracking operating modes are selected in accordance with a set of decision rules on a sample by sample basis based on the quality of the current hard decision. If the current hard decision is low quality, then the soft decision sample (acquisition mode) is used. If the current hard decision is high quality, then the hard decision sample (tracking mode) is used. In such manner, the DFE is operated in a hybrid mode, i. e.

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Troy Schaffer Photo 2

Troy Schaffer Jr.

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Troy Schaffer Photo 3

Troy Schaffer

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Troy Schaffer Photo 4

Troy Schaffer

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Troy Schaffer Photo 5

TRoy Schaffer

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Troy Schaffer Photo 6

Troy Schaffer

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Troy Schaffer Photo 7

Troy Schaffer

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Troy Schaffer Photo 8

Troy Schaffer

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Troy Schaffer Photo 9

Troy Schaffer

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Youtube

Troy B Schaffer--Blues Shuffle with the Jimmy...

Jimmy Mac on vocals and guitar, T. Schaffer on Leides Shore Inn 2012--...

  • Duration:
    3m 46s

Troy B. Schaffer--shake, rattle and roll with...

Recorded at Leides Shore Inn with the great Jimmy Mac .2012--------all...

  • Duration:
    4m 11s

-Troy B. Schaffer--"why I sing the blues"

At hot shots--T. schaffer lead guitar 2012-- S.I.. new york.

  • Duration:
    4m 19s

Troy B Schaffer--Mojo--

Got my mojo workin recorded at Leides shore inn 2012--T.Schaffer lead ...

  • Duration:
    4m 17s

troy schaeffer clip

  • Duration:
    4m 36s

Troy B.Schaffer--Red House

Troy B Schaffer--Blues at Leides shore inn-- Staten Island.

  • Duration:
    5m 26s

Myspace

Troy Schaffer Photo 10

Troy Schaffer

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Locality:
Gold Coast, Australia
Gender:
Male
Birthday:
1951
Troy Schaffer Photo 11

Troy Schaffer

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Locality:
HAZEL CREST, Illinois
Gender:
Male
Birthday:
1944
Troy Schaffer Photo 12

Troy Schaffer

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Locality:
Sherwood, Arkansas
Gender:
Male
Birthday:
1929
Troy Schaffer Photo 13

Troy Schaffer

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Locality:
BALTIMORE
Gender:
Male
Birthday:
1950
Troy Schaffer Photo 14

Troy Schaffer

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Locality:
BALTIMORE, Maryland
Gender:
Male
Birthday:
1951

Classmates

Troy Schaffer Photo 15

Troy Schaffer (Schafer)

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Schools:
Big Spring High School Newville PA 2005-2009
Community:
Karen Lindsey
Troy Schaffer Photo 16

Troy Schaffer (Sculimbrene)

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Schools:
Mercer High School Mercer PA 1978-1982
Community:
Jamie Belk, Ken Holden
Troy Schaffer Photo 17

Troy Schaffer

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Schools:
Henry Neill Elementary School Aberdeen SD 1984-1988
Community:
Grace Marmorstein, Terah Bartels, Shane Schumacher
Troy Schaffer Photo 18

Troy Schaffer, Bayard Hig...

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Troy Schaffer Photo 19

Troy Schaffer | Jefferson...

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Troy Schaffer Photo 20

Henry Neill Elementary Sc...

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Graduates:
Troy Schaffer (1984-1988),
Jeremy Same (1987-1991),
Serge Rolston (1974-1978),
Kim Jones (1965-1966),
Joan Turner (1972-1974),
Crystal Coull (1979-1979)
Troy Schaffer Photo 21

Jeffersontown High School...

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Graduates:
Troy Schaffer (1980-1984),
Tina Buschermohle (1973-1977),
Natalie Vanmeter (1997-2001),
Belinda Bernard (1970-1974)
Troy Schaffer Photo 22

Esther Schaffer, Troy Hig...

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Googleplus

Troy Schaffer Photo 23

Troy Schaffer

Troy Schaffer Photo 24

Troy Schaffer (Young T30)

Troy Schaffer Photo 25

Troy Schaffer

Troy Schaffer Photo 26

Troy Schaffer


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