Velocity responsive filtering for pilot signal reception
Patent 7116957 Issued on October 3, 2006. Estimated Expiration Date: 
October 22, 2021. 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.
October 22, 2021. 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 ReferencesMethod and apparatus for coherent communication in a spread-spectrum communication system Patent #: 5329547 InventorsAssigneeApplicationNo. 09986222 filed on 10/22/2001US Classes:455/266, Selectivity or bandwidth control455/307, With specific filter structure455/339, Band pass filter370/342, Combining or distributing information via code word channels using multiple access techniques (e.g., CDMA)375/349, Plural signal paths in receiver375/141End-to-end transmission systemExaminersPrimary: Vuong, Quochien B.Attorney, Agent or FirmInternational ClassH04B 1/06AbstractThe velocity of a wireless communications device (106) is estimated. In response to this estimate, a filter bandwidth, such as a pilot filter (310) bandwidth, is adjusted so that the introduction of noise and distortion to a signal received by the device is mitigated. The filter bandwidth is adjusted by increasing it as the estimated velocity increases; and decreasing it as the estimated velocity decreases. Such adjustments may be accomplished through providing a number of predetermined bandwidths that each correspond to a particular velocity range, and setting the filter bandwidth to the predetermined bandwidth that corresponds to the estimated velocity.Other References
Field of SearchSelectivity or bandwidth controlWith specific filter structure Band pass filter RECEIVER OR ANALOG MODULATED SIGNAL FREQUENCY CONVERTER With control (e.g., automatic gain control, automatic frequency control, etc.) With frequency control Combining or distributing information via code word channels using multiple access techniques (e.g., CDMA) Combining or distributing information via code word channels using multiple access techniques (e.g., CDMA) Channel assignment Interference or noise reduction Plural signal paths in receiver By filtering (e.g., digital) Speed By distance and time measurement | |
