Method of synchronizing an independent data device of a wireless data communications system on an incident pulsed signal of the ultra wide band type, and corresponding independent data device
Patent 7254202 Issued on August 7, 2007. Estimated Expiration Date: 
March 31, 2024. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
March 31, 2024. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesMethods and apparatuses for synchronization and modulation type detection Determining channel characteristics in a wireless communication system that uses multi-element antenna Patent #: 6925131 InventorsAssigneeApplicationNo. 10814824 filed on 03/31/2004US Classes:375/354, SYNCHRONIZERS375/340, Particular pulse demodulator or detector375/343, Correlative or matched filter375/299, Plural diversity370/252Determination of communication parametersExaminersPrimary: Bayard, EmmanuelAttorney, Agent or FirmForeign Patent References
International ClassH04L 7/00AbstractAn incident signal contains a preamble including a training sequence having a series of pulses whose polarity and time shifts are defined by respective polarity code and time-hopping code. A method includes a digital cross-correlation of the received signal with the training sequence. The cross-correlation algebraically sums in accordance with the polarity code windows of the received signal. The starting points of the windows are determined by the time-hopping code. The cross-correlation further includes detecting the end point of the preamble from the result of the digital cross-correlation. When the size of the receiving buffer, i.e., the size of the window is smaller than the number N of samples of each replica of the training sequence, it is particularly advantageous that the digital cross-correlation be performed iteratively in a block-by-block fashion. The computation of each block is split into M slices which are computed by algebraically summing windows N/M samples long.Other References
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