Abstract: A system and method utilize a dual correlation, one for the synchronization pattern (sync correlation) and one for the channel equalization pattern (CE correlation), to determine where the channel equalization pattern starts and thus establish frame synchronization. The system and method compare the two correlations and decides on the start of the channel equalization symbols when the CE correlation is larger than the sync correlation.

Abstract: An ultra wideband receiver, based on multiband orthogonal frequency division multiplexing (MB-OFDM), combines digital data from multiple channels after signal processing and before decoding. The receiver provides a master controller that synthesizes packet synchronization, frame synchronization, and sampling frequency offset information from multiple channels into signals that simultaneously control all channels of the receiver.

Abstract: An ultra-wideband clear channel assessment system uses a double-window energy technique for energy detection, which indicates a clear or busy channel.

Abstract: A system and method enable the fast decoding of a front end of data (e.g., a header) that is convolutionally encoded by treating the front end as a block code. The system and method receive the convolutionally encoded data; extract a finite sized block from the data; and decode the extracted block using a block error correction decoding method. A Viterbi decoder can then be used to decode the remainder of the encoded data based on the decoded block.

Abstract: A system and method utilize a dual correlation, one for the synchronization pattern (sync correlation) and one for the channel equalization pattern (CE correlation), to determine where the channel equalization pattern starts and thus establish frame synchronization. The system and method compare the two correlations and decides on the start of the channel equalization symbols when the CE correlation is larger than the sync correlation.

Abstract: The present invention relates to a method for the prognosis of a vascular event or the diagnosis of ACS in a patient suspected of being at risk for a vascular event or condition, said patient presenting: no elevation of the ST segment as seen on an electrocardiogram, and/or a normal level of at least one necrosis marker, wherein the presence and/or levels of at least two different biochemical markers are measured in a biological sample of said patient, whereby the probability that the patient will experience a vascular event or the vascular-related condition is deduced from the measured presence and/or levels of the biochemical markers.

Abstract: The invention enables automatic gain control in ultra wideband applications over multiple channels and frequency bands.

Abstract: A method is presented for packet detection and symbol boundary location using a two-step sign correlation procedure. When the correlation crosses a threshold, a packet detection signal is generated to initiate processing of downstream blocks, and a symbol boundary location signal is generated for use in aligning data during processing.

Abstract: A receiver sets weights for an antenna array according to a series of algorithms including an energy algorithm, a least squares algorithm and a least mean square algorithm.

Abstract: A system and method enable the fast decoding of a front end of data (e.g., a header) that is convolutionally encoded by treating the front end as a block code.

Abstract: An ultra-wideband clear channel assessment system uses a double-window energy technique for energy detection, which indicates a clear or busy channel.

Abstract: An ultra wideband receiver combines digital data from multiple channels after signal processing and before decoding and provides a master controller that combines control signals from multiple channels to control the receiver.

Abstract: The invention enables automatic gain control in ultra wideband applications over multiple channels and frequency bands.

Abstract: A system and method that uses pilot tones to determine a phase estimate to adjust the phase of a sampling clock of an analog-to-digital converter (ADC) to compensate for sampling frequency offset between the ADC in a receiver and a digital-to-analog converter in a transmitter.

Abstract: A method is presented for packet detection and symbol boundary location using a two-step sign correlation procedure. When the correlation crosses a threshold, a packet detection signal is generated to initiate processing of downstream blocks, and a symbol boundary location signal is generated for use in aligning data during processing.

Abstract: A receiver sets weights for an antenna array according to a series of algorithms including an energy algorithm, a least squares algorithm and a least mean square algorithm.

Abstract: A sliding window with big gap data compression system is simple to implement and gives good compression over a wide variety of bilevel images. A sliding window compressor with a very small window size is utilized in conjunction with a storage buffer which is large enough to hold at least an entire scan line of data symbols. Coupled to the storage buffer is circuitry that checks for a match between the incoming data symbol and a symbol stored in one specific programmable location. This programmable location is preferably exactly one scan line length away. Match locations are either within the range of the small window or exactly equal to the specific programmable location. The entire compressor can be viewed as a sliding window with a big gap (SWBG). This sliding window is of a length corresponding to the length of the scan line, comprised of the small window followed by a big gap and then the one specific programmable location, at the end of the scan line.

Abstract: An adaptive lossless data compression system with systolic string matching logic performs compression and decompression at the maximum rate of one symbol per clock cycle. The adaptive data compression system uses an improvement of the LZ1 algorithm. A content addressable memory (CAM) is used to store the last n input symbols. The CAM is stationary, stored data is not shifted throughout the CAM, but rather the CAM is used as a circular queue controlled by a Write Address Pointer Counter (WREN). During a compression operation, a new input symbol may be written to the CAM on each clock cycle, while simultaneously the rest of the CAM is searched for the input symbol. Associated with each word of the CAM array is a String Match State Machine (SMSM) and, an address logic module (ALM). These modules detect the occurrence of strings stored in the CAM array that match the current input string and report the address of the longest matching string nearest to the Write Address Pointer.

Abstract: The present invention is for a Error Correction Unit (ECU) that uses a single stack architecture for the generation, reduction and evaluation of the polynomials involved in the correction of a Reed-Solomon code. The circuit uses the same hardware to generate the syndromes, reduce the .OMEGA.(x) and .LAMBDA.(x) polynomials and evaluate the .OMEGA.(x) and .LAMBDA.(x) polynomials. Some of the specifics involved in calculating and reducing the polynomials mentioned above are novel as well. First, the implementation of the general Galois field multiplier is new and faster than previous implementations. Second, the circuit for implementing the Galois field inverse function has not appeared in prior art designs. Third, a novel method of generating the .OMEGA.(x) and .LAMBDA.(x) polynomials (including alignment of these polynomials prior to evaluation) is utilized. Fourth, corrections are performed in the same order as they are received using a premultiplication step prior to evaluation.