Power line communication apparatus
April 16, 2006. 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 3274379 3411088 Matched filter communication systems Methods and apparatus for rejection of interference in a digital communications system Adaptive noise cancelling receiver Carrier transmission through harmonic polluted medium Transmitting signals over alternating current power networks Coherent phase shift keyed demodulator for power line communication systems Digital signal reception system Technique for high rate digital transmission over a dynamic dispersive channel InventorsAssigneeApplicationNo. 06/852788 filed on 04/16/1986US Classes:375/257, CABLE SYSTEMS AND COMPONENTS340/310.13, Noise reduction (e.g., filtering)375/343, Correlative or matched filter375/350, By filtering (e.g., digital)714/819Comparison of dataExaminersPrimary: Griffin, Robert L.Assistant: Huseman, Marianne Attorney, Agent or FirmInternational ClassH04B 3/54 (20060101)AbstractA power line communication system specially designed for use in local area network (LAN) configurations has receiver and transmitter sections for fast, highly reliable data communication. The receiver includes controlled adaptive second order filters for ensuring data reception in virtually any signal environment having noise and distortion characteristics, especially alternating current (AC) power lines. A wideband phase shift-keyed (PSK) carrier is impressed on the transmission medium, the carrier having power spread approximately uniformly across a useful frequency bandwidth. A transmitter section is arranged for adaptive feedback control of the transmitted signal power, so as to prevent possible damage to the transmitter when the transmission medium impedance is low. A logic control circuit provides a correlation count of a received signal in comparison with a known reference signal in order to effectively achieve phase synchronization between the receiver and transmitter.Other References
| |
