Phase conjugated vectoring of signals in telephone cables
First Claim
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1. A method of phase conjugated vectoring (PCV) of transmission signals propagating via a plurality of twisted pairs of a telephone cable comprising the steps of:
- propagating a reference signal from a receiver site via one twisted pair of said plurality for obtaining a wavefront of PCV reference signal at a transmitter site;
establishing PCV antenna bundle for each twisted pair of said plurality, scaling input transmission signals by said PCV reference signal for obtaining mutually coherent PCV transmission signals; and
propagating said mutually coherent PCV transmission signals via said PCV antenna bundles for receiving only one signal in a corresponding twisted pair at the receiver site.
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Abstract
A phase conjugation vectoring (PCV) of signals propagating in telephone cables of twisted pairs provides crosstalk free transmission therethrough. The cable is considered a non-uniform physical media, and criteria for phase conjugation of electromagnetic fields are established. Method and system provide PCV for both asymmetric and symmetric transmission.
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Citations
18 Claims
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1. A method of phase conjugated vectoring (PCV) of transmission signals propagating via a plurality of twisted pairs of a telephone cable comprising the steps of:
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propagating a reference signal from a receiver site via one twisted pair of said plurality for obtaining a wavefront of PCV reference signal at a transmitter site;
establishing PCV antenna bundle for each twisted pair of said plurality, scaling input transmission signals by said PCV reference signal for obtaining mutually coherent PCV transmission signals; and
propagating said mutually coherent PCV transmission signals via said PCV antenna bundles for receiving only one signal in a corresponding twisted pair at the receiver site. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of crosstalk free transmission of signals through telephone cable having a plurality of twisted pairs between a transmitter site and a receiver site, comprising the steps of:
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identifying the telephone cable as a non-uniform physical media;
introducing phase conjugation vectoring (PCV) by propagating one reference signal via one twisted pair of said plurality from the receiver site to the transmitter site, wherein a diverged front of electromagnetic wave presenting said one reference signal is reversed back to the transmitter site to said one twisted pair;
forming a bundle for each twisted pair of said plurality for providing a corresponding phase conjugated vectoring antenna;
scaling an input signal by the corresponding reversed reference signal for obtaining scaling parameters of mutually coherent transmission signals; and
propagating simultaneously said mutually coherent transmission signals from the transmitter site via said PCV antenna bundle for obtaining one receiving signal in one said twisted pair at the receiver site. - View Dependent Claims (9, 10, 11, 12)
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13. A system of crosstalk free transmission of signals via a plurality of twisted pairs of a telephone cable between a transmitter and a receiver sites, comprising:
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transmission modems connected to the twisted pairs at the transmitter site, said transmission modems comprising combining units for collecting signals from a respective PCV antenna bundle;
a processing unit coupled with each said combining unit for providing parameters for the PCV antenna bundles for each said twisted pair; and
a PCV components bank coupled to said processing unit for storing parameters of each said PCV antenna, wherein the crosstalk free transmission is provided by scaling input signals to corresponding reversed reference signals and applying scaled signals to the respective PCV antenna bundles. - View Dependent Claims (14, 15, 16, 17, 18)
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Specification