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Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Inventor:
Hladik; Stephen Michael
Address:
Albany, NY
No. of patents:
24
Patents:












Patent Number Title Of Patent Date Issued
7313127 Method and apparatus for synchronizing a radio telemetry system by way of transmitted-reference, December 25, 2007
A time-division-multiplexed radio communication system and method uses transmitted-reference, delay-hopped (TR/DH) ultra-wideband (UWB) broadcast signal to provide a pilot signal to all mobile devices in a coverage area from which time synchronization is derived. Using this TR/DH UWB
7127656 Turbo decoder control for use with a programmable interleaver, variable block length, and multip October 24, 2006
A turbo decoder control comprises an address generator for addressing systematic data, parity data, and systematic likelihood ratios according to a pre-determined memory mapping. The systematic data samples are accessed in the order required by the MAP decoding algorithm such that in
7099422 Synchronization of ultra-wideband communications using a transmitted-reference preamble August 29, 2006
A method and apparatus of initial synchronization, or acquisition, of time modulated ultra-wideband (UWB) communications uses a transmitted-reference preamble. The method and apparatus require that the transmitter first send a time-reference, delay-hopped (TR/DH) burst; such a burst
6715120 Turbo decoder with modified input for increased code word length and data rate March 30, 2004
A turbo decoder system utilizing a MAP decoding algorithm has a predetermined number of turbo decoder modules for decoding segments of a turbo code component code word in parallel, thereby expanding the block-length and data rate capability of the turbo decoder. Upon completion of an
6594792 Modular turbo decoder for expanded code word length July 15, 2003
A turbo decoder system utilizing a MAP decoding algorithm has a predetermined number of turbo decoder modules for decoding segments of a turbo code component code word in parallel, thereby expanding the block-length and data-rate capability of the turbo decoder system. Input data sam
6570497 Apparatus and method for rail track inspection May 27, 2003
An apparatus for inspecting an operational condition of a rail track from a railcar includes an antenna positioned on the railcar that directs radar signals toward the rail track and collects radar signals returned from the rail track. A radar transceiver is connected to the antenna and
6519296 Variable-interval pilot symbol aided modulation and demodulation February 11, 2003
The signaling overhead required for pilot symbol aided modulation is significantly reduced by recognizing that the residual uncertainty in the carrier frequency decreases after an initial carrier frequency estimate is made during an initial signal interval. This allows a commensurate
6516437 Turbo decoder control for use with a programmable interleaver, variable block length, and multip February 4, 2003
A turbo decoder control comprises an address generator for addressing systematic data, parity data, and systematic likelihood ratios according to a pre-determined memory mapping. The systematic data samples are accessed in the order required by the MAP decoding algorithm such that in
6497656 Integrated wireless broadband communications network December 24, 2002
An integrated tracking, telemetry and local area networking system is provided. A communications system comprises a broadband subsystem comprising at least one UWB node including a first UWB transceiver and at least one application node linked to the UWB node by a broadband link. The
6304996 High-speed turbo decoder October 16, 2001
A high-speed turbo decoder utilizes a MAP decoding algorithm and includes a streamlined construction of functional units, or blocks, amenable to ASIC implementation. A gamma block provides symbol-by-symbol a posteriori state transition probability estimates. Two gamma probability functio
6263467 Turbo code decoder with modified systematic symbol transition probabilities July 17, 2001
A feedback control for a turbo decoder controls the feedback between component decoders of the turbo decoder by substituting either a neutral value or a weighted value for the channel transition probabilities utilized by each component decoder during the iterative decoding process. A
6223319 Turbo code decoder with controlled probability estimate feedback April 24, 2001
A feedback control for a turbo decoder controls the feedback between component decoders by modifying updated a priori probabilities calculated by one component decoder and used as inputs to another component decoder during the decoding process, resulting in a significant performance
6192501 High data rate maximum a posteriori decoder for segmented trellis code words February 20, 2001
In a communications system, a trellis code word is segmented by both the encoder and a segmented MAP decoder. The segmented MAP decoder operates on code word segments as if they were individual code words and takes advantage of knowing the state of the encoder at specified times to reduc
6128765 Maximum A posterior estimator with fast sigma calculator October 3, 2000
Forward and backward recursive calculations in a maximum a posteriori decoding process are performed in parallel processes, rather than sequentially, allowing the a posteriori transition probabilities to be calculated in the same time interval as the recursions, thereby reducing deco
6088405 Optimal decoder for tall-biting convolutional codes July 11, 2000
A decoder of digital data signals for a message sequence of N symbols from a data source, encoded with a tail-biting convolutional code, and for correcting all combinations of up to a preselected number e of bit errors, operates upon the sequentially-received collection of consecutive-en
5878034 Spacecraft TDMA communications system with synchronization by spread spectrum overlay channel March 2, 1999
In a time division multiple access spacecraft communication system, each ground station determines when to send its information packets to arrive at the spacecraft at the beginning of a time slot. The calculation is based upon knowledge of the locations of the spacecraft and the tran
5867489 Method and apparatus for TDMA slot synchronization with precision ranging February 2, 1999
In a time division multiple access spacecraft communication system, each ground station determines when to send its information packets to arrive at the spacecraft at the beginning of a time slot. The calculation is based upon knowledge of the location of the spacecraft. A master ground
5761238 Transmitted reference spread spectrum communications system June 2, 1998
A low complexity and low cost transmitted reference spread spectrum communications system provides several methods of generating a suitable wideband carrier, a method for combining the wideband carrier with a narrowband modulated wideband carrier, and a number of implementations of a
5752218 Reduced-power GPS-based system for tracking multiple objects from a central location May 12, 1998
Location of an object to be tracked is determined by measuring, at a receiver situated at the object, the propagation time differences between the signals from a plurality of GPS satellites, each of which is received by the receiver situated at the object. The measured propagation time
5734962 Satellite communications system utilizing parallel concatenated coding March 31, 1998
A VSAT satellite communications network utilizes parallel concatenated coding on its inbound or outbound links, or both. For short data blocks, nonrecursive systematic tail-biting convolutional codes are used. For longer data blocks, recursive systematic convolutional codes are used.
5721746 Optimal soft-output decoder for tail-biting trellis codes February 24, 1998
A circular MAP decoder for error-correcting trellis codes that employ tail biting produces soft-decision outputs provides an estimate of the probabilities of the states in the first stage of the trellis, which probabilities replace the a priori knowledge of the starting state in a co
5721745 Parallel concatenated tail-biting convolutional code and decoder therefor February 24, 1998
A parallel concatenated convolutional coding scheme utilizes tail-biting nonrecursive systematic convolutional codes. The associated decoder iteratively utilizes circular maximum a posteriori decoding to produce hard and soft decision outputs. This encoding/decoding system results in
5682139 Railcar location using mutter networks and locomotive transmitter during transit October 28, 1997
A method of tracking railcars in transit using global positioning techniques involves determining the location of a railcar by using a Global Positioning System (GPS) receiver and a satellite transceiver on board the locomotive, and a local area network of railcar tracking units. Ins
5680143 Method and apparatus for a low complexity satellite ranging system using Gaussian noise overlay October 21, 1997
A ranging system for a communications spacecraft (14) overlays a Gaussian noise signal over a broadband channel which also carries information or traffic signals. The noise is used to establish the range between a ground station (12) and the spacecraft (14). The range is determined by de










 
 
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