Patent application number | Description | Published |
20120027118 | FAR-END CROSSTALK CANCELING METHOD AND DEVICE, AND SIGNAL PROCESSING SYSTEM - A method for remote crosstalk cancellation, includes: the combination transmitting signal is performed a pre-coding of crosstalk cancellation in the manner of self-adapting filtering, the self-adapting changes of the values of filtering parameters are guided correctly with the influence of the crosstalk component in the received signals which is reflected indirectly by relevant values of the noise statistic reported by the receiver. A corresponding device and a signal processing system for remote crosstalk cancellation are provided. The self-adapting adjustment of the values of filtering parameters has a favorable astringency and an effect for crosstalk cancellation, avoiding the need to know the channel transmission matrix in advance, while absolutely avoiding the conflict to the existing transmission standard. | 02-02-2012 |
20120207197 | SIGNAL PROCESSING METHODS, DEVICES AND SYSTEMS IN BONDING-DSL - In the field of communication, this application discloses a signal processing method, device, and system of bonded DSL channels. A signal processing method of bonded DSL channels: sending a pilot sequence to a receiving end through bonded channels; receiving, through the bonded channels, clipped error sample fragments returned by the receiving end, where the receiving end constructs a clipped error sample according to an error of a received signal and fragments the clipped error sample to acquire the clipped error sample fragments; aggregating the received clipped error sample fragments into a clipped error sample; and calculating a pre-encoding coefficient according to the pilot sequence and the aggregated clipped error sample, where the pre-encoding coefficient is used to perform pre-encoding processing on a signal before the signal is sent. | 08-16-2012 |
20120237012 | xDSL SYSTEM AND SIGNAL TRANSMISSION METHOD, SENDING DEVICE, AND RECEIVING DEVICE OF xDSL SYSTEM - An xDSL signal transmission method includes: receiving 2N−1 signals from 2N−1 signal input ends, where each signal in the 2N−1 signals is a signal transmitted by an independent channel in the xDSL system; pre-multiplying a (2N−1)×1 matrix formed by the 2N−1 signals by a first conversion matrix to obtain a 2N×1 matrix, where elements in the 2N×1 matrix respectively correspond to 2N signals, and the first conversion matrix is a 2N×(2N−1) matrix; and sending the 2N signals via N twisted pair lines respectively. The N twisted pair lines can transmit signals of 2N−1 channels, thereby increasing the number of signal transmissions, and improving signal transmission efficiency. | 09-20-2012 |
20120237017 | METHOD, DEVICE AND SYSTEM FOR EXTENDING CHANNELS - The present invention provides a method, a device and a system for extending channels, and belongs to the field of communications technologies. The method includes: generating a non-cascade extended channel by using a first channel and a second channel; and generating a first-level cascade extended channel by using the non-cascade extended channel and a third channel, where the first channel and the second channel are both twisted-pair channels, and the third channel is a twisted-pair channel or another non-cascade extended channel. The device includes a first transformer and a second transformer. The system includes a first device and a second device. | 09-20-2012 |
20130003961 | FAR-END CROSSTALK CANCELING METHOD AND DEVICE - A method for remote crosstalk cancellation, includes: the combination transmitting signal is performed a pre-coding of crosstalk cancellation in the manner of self-adapting filtering, the self-adapting changes of the values of filtering parameters are guided correctly with the influence of the crosstalk component in the received signals which is reflected indirectly by relevant values of the noise statistic reported by the receiver. A corresponding device for remote crosstalk cancellation is provided. | 01-03-2013 |
20130272703 | Method and Apparatus of Delivering Upstream Data in Ethernet Passive Optical Network Over Coaxial Network - An apparatus for interconnecting a fiber-optic network and a coax network comprising a coax line terminal (CLT) configured to couple to an optical line terminal (OLT) at the fiber-optic network and a plurality of coax network units (CNUs) at the coax network and to cache data received from the CNUs and forward the cached data to the OLT upon receiving a message from the OLT that assigns a transmission cycle for a specified CNU, wherein the CLT forwards the cached data to the OLT upon receiving the message regardless of whether the cached data corresponds to the specified CNU. | 10-17-2013 |
20130322882 | Method and Apparatus of Building a Coaxial Convergence Layer in Ethernet Passive Optical Network (PON) over Coaxial Network (EPoC) - An apparatus comprising a data framer comprising a physical layer protocol stack comprising a coax convergence layer, a coax framing layer next to the convergence layer, wherein the coax framing layer is configured to decompose and assemble data packets in a coax network, a coax coding layer next to the coax frame layer, wherein the coax coding layer is configured to protect the coax transmissions from impairments, a coax modulation layer next to the coax coding layer, wherein the coax modulation layer is configured to modulate the data according to a coax physical layer (PHY), and a radio frequency layer next to the coax modulation layer and configured to interface to an electrical medium for a coaxial network. | 12-05-2013 |
20140099113 | Managing Downstream Non-Broadcast Transmission in an Ethernet Passive Optical Network (EPON) Protocol over Coax (EPoC) Network - An OLT comprising an optical port configured to couple to an optical distribution network, a processor coupled to the optical port and configured to generate a DL-MAP based on non-broadcast downstream bandwidth allocations for a plurality of network units, wherein each of the downstream bandwidth allocations is not assigned to all of the network units, generate an EPON MPCP downstream gate message comprising the DL-MAP, and embed the DL-MAP in the EPON MPCP downstream gate message, and a transmitter coupled to the processor and the optical port, wherein the transmitter is configured to transmit the EPON MPCP downstream gate message to the network units via the PON. | 04-10-2014 |
20140178076 | Round Trip Time Aware Dynamic Bandwidth Allocation For Ethernet Passive Optical Network Over Coaxial Network - An apparatus comprising a receiver configured to receive a plurality of transmission requests from a plurality of end nodes via an optical network and an electrical network, a processor coupled to the receiver and configured to dynamically allocate optical transmission time slots to the end nodes according to measured RTTs of the end nodes, and a transmitter coupled to the processor and configured to transmit the allocated transmission time slots to the end nodes. Also disclosed is a method performed by an OLT comprising receiving a plurality of transmission requests from a plurality of network units via a PON and an electrical network, and allocating optical transmission time slots to the network units dynamically according to measured RTTs of the network units. | 06-26-2014 |
20140301433 | FAR-END CROSSTALK CANCELING METHOD AND DEVICE - A method for remote crosstalk cancellation, includes: the combination transmitting signal is performed a pre-coding of crosstalk cancellation in the manner of self-adapting filtering, the self-adapting changes of the filtering parameters are guided correctly with the influence of the crosstalk component in the received signals which is reflected indirectly by relevant values of the noise statistic reported by the receiver. A corresponding device for remote crosstalk cancellation is provided. | 10-09-2014 |
20140301734 | Optimizing Optical Systems Using Code Division Multiple Access and/or Orthogonal Frequency-Division Multiplexing - An optical receiver comprises an optical port configured to receive an encoded optical signal, and a demodulation block indirectly coupled to the port and comprising a multiplexer, wherein the multiplexer is configured to receive an encoded electrical signal, wherein the encoded electrical signal is associated with the encoded optical signal, and wherein the encoded electrical signal is encoded using a code division multiple access (CDMA) scheme, receive a code associated with the scheme, perform a dot multiplication of the encoded electrical signal and the code, and generate a differential voltage based on the dot multiplication. | 10-09-2014 |
20140376916 | Method and Apparatus of Delivering Upstream Data in Ethernet Passive Optical Network Over Coaxial Network - An apparatus for interconnecting a fiber-optic network and a coax network comprising a coax line terminal (CLT) configured to couple to an optical line terminal (OLT) at the fiber-optic network and a plurality of coax network units (CNUs) at the coax network and to cache data received from the CNUs and forward the cached data to the OLT upon receiving a message from the OLT that assigns a transmission cycle for a specified CNU, wherein the CLT forwards the cached data to the OLT upon receiving the message regardless of whether the cached data corresponds to the specified CNU. | 12-25-2014 |