ADAPTIVE LINE EQUALIZER FOR IMPROVING DATA COMMUNICATION OVER LESS THAN PERFECT POWER LINES OR TRANSMISSION LINES
First Claim
1. A line equalizing module for a home area networking (HAN) system including two or more devices represented by two or more transceivers, respectively, which are coupled to a transmission line, the line equalizing module comprising:
- one or more LC circuits including at least one inductor coupled to at least one capacitor, the one or more LC circuits being configured to provide a variable propagation delay for dynamically correcting imperfection in data communication among the two or more devices, the imperfection being associated with at least one open-ended stub of the transmission line, the variable propagation delay being adjusted to (A) shift one or more nulls in a frequency response to outside a frequency range of interest, or (B) match impedance between the two or more devices and the transmission line, or both (A) and (B).
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Accused Products
Abstract
Systems and methods for improving data communication over less than perfect power lines or transmission lines are described. The systems and methods allow for pushing out electrically any null within a frequency range of interest and/or for lossless transmission by providing impedance matching between communication devices and the transmission line. This is achieved by implementing line equalizing modules within the transceivers, at the transmitter side and/or the receiver side, or by plugging, as a stand-alone module, into an electrical outlet within a building. The line equalizing module includes multiple inductor-capacitor cells coupled in cascade where multiple switches allow for selective and concurrent connection between the inductor-capacitor cells. In another embodiment, the line equalizing module includes variable inductor-capacitor cells. The line equalizing module provides a variable propagation delay that allows for stretching electrically the transmission line. Further improvement may achieve by adjusting the operational frequency using an up-conversion or down-conversion operation.
6 Citations
15 Claims
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1. A line equalizing module for a home area networking (HAN) system including two or more devices represented by two or more transceivers, respectively, which are coupled to a transmission line, the line equalizing module comprising:
one or more LC circuits including at least one inductor coupled to at least one capacitor, the one or more LC circuits being configured to provide a variable propagation delay for dynamically correcting imperfection in data communication among the two or more devices, the imperfection being associated with at least one open-ended stub of the transmission line, the variable propagation delay being adjusted to (A) shift one or more nulls in a frequency response to outside a frequency range of interest, or (B) match impedance between the two or more devices and the transmission line, or both (A) and (B). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
Specification