Signal compression systems
Patent 5426665 Issued on June 20, 1995. Estimated Expiration Date: 
March 2, 2014. 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 2, 2014. 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 ReferencesReceivers for navigation satellite systems Digital receiver for spread-spectrum signals System and method for receiving and decoding global positioning satellite signals Patent #: 5271034 InventorsAssigneeApplicationNo. 204129 filed on 03/02/1994US Classes:375/150, Correlation-type receiver380/34Plural carrier frequenciesExaminersPrimary: Cain, DavidAttorney, Agent or FirmInternational ClassH04K 001/10Foreign Application Priority Data1993-05-07 GBAbstractA signal compression system a receiver comprising, a down frequency converter to which received compressed signals are fed thereby to provide compressed baseband signals and an m-bit digital correlator defined by the serial combination of n similar smaller correlator stages, each of k-bits, where nk=m, and a Fast Fourier Transform (FFT) processor having n input ports fed from the n similar smaller correlators stages, one to each port, thereby to provide n output signals from the FFT processor which are fed to signal selector means which serves to select that output signal from the FFT processor which has the largest amplitude thereby to provide a decompressed signal. | |
