Spread-spectrum communication system
Patent 4691326 Issued on September 1, 1987. Estimated Expiration Date: 
April 11, 2005. 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.
April 11, 2005. 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 References 3706933 Code correlator loop using arithmetic synthesizer Pseudo-random-number-code-detection and tracking system Compound surface acoustic wave matched filters Adaptive acquisition of multiple access codes Patent #: 4538281 InventorAssigneeApplicationNo. 06/722720 filed on 04/11/1985US Classes:375/152, Matched-filter-type receiver375/343Correlative or matched filterExaminersPrimary: Griffin, Robert L.Assistant: Huseman, M. Attorney, Agent or FirmInternational ClassH04B 1/707 (20060101)Foreign Application Priority Data1984-04-17 JPAbstractA receiver in a spread-spectrum communication system is adapted to receive a signal which is modulated by a binary code modulated by a binary code or a data, and includes a matched filter which detects a correlation between the received signal and a reference signal modulated by a reference code produced by a code generator. When the received code supplied from the matched filter coincides with or is slightly displaced from the reference code, a pulse is produced from a correlation spike waveform with a relatively large amplitude to extract a desired pulse from the pulse and use it to initialize the reference code generator. | |
