Abstract: A detector system has a local oscillator port, a radio frequency port, and an oscillator providing a local oscillator signal having amplitude-modulated (“AM”) noise coupled. A first detector detects the local oscillator signal and produces a first detected signal having a first detected AM noise signal component and a demodulated signal component at a first phase. A second detector detects a second high-frequency signal to produce a second detected signal having a second detected AM noise signal component at a second phase. An algebraic combining network combines the first detected signal and the second detected signal to produce a demodulated signal component at an output. A phase delay disposed between the local oscillator and the output of the algebraic combining network is calibrated to offset the first phase from the second phase to improve signal-to-noise ratio at the output.

Abstract: A detector system has a first detector configured to detect a first high-frequency signal having amplitude-modulated (“AM”) noise to produce a first detected signal having at least a first detected AM noise signal component and a demodulated signal component and a second detector configured to detect a second high-frequency signal having the AM noise to produce a second detected signal having at least a second detected AM noise signal component. An algebraic combining network combines the first detected signal and the second detected signal to cancel the first detected AM noise signal component with the second detected AM noise signal component to produce an output signal including the demodulated signal component.

Abstract: A field disturbance sensing system has an antenna, an oscillator producing a high-frequency signal, a first detector circuit, a second detector circuit, a combining network configured to couple the high-frequency signal to the antenna, and to couple the high-frequency signal and a reflected high-frequency signal to the first detector and to the second detector. An algebraic combining network sums a first detected signal having first detected high-frequency signal and a first detected reflected signal from the first detector circuit and a second detected signal having second detected high-frequency signal and a second detected reflected signal from the second detector circuit to produce a detected output signal. The first detected reflected signal is added to the second detected reflected signal and the first detected high-frequency signal is subtracted from the second detected high-frequency signal. A controller configured to convert the detected output signal to a speed between the antenna and a target.

Abstract: A method of down-converting couples a first high-frequency signal to a first detector and to a second detector. An antenna receives a signal and the received signal is provided to at least the first detector. The high-frequency signal is detected to produce a first detected signal including a first detected high-frequency signal and a demodulated signal. The high-frequency signal is concurrently detected to produce a second detected high-frequency signal. The second detected signal is subtracted from the first detected signal so as to cancel amplitude-modulated noise on a detected signal output.

Abstract: A detector system has a first detector configured to detect a first high-frequency signal having amplitude-modulated (“AM”) noise to produce a first detected signal having at least a first detected AM noise signal component and a demodulated signal component and a second detector configured to detect a second high-frequency signal having the AM noise to produce a second detected signal having at least a second detected AM noise signal component. An algebraic combining network combines the first detected signal and the second detected signal to cancel the first detected AM noise signal component with the second detected AM noise signal component to produce an output signal including the demodulated signal component.

Abstract: A field disturbance sensing system has an antenna, an oscillator producing a high-frequency signal, a first detector circuit, a second detector circuit, a combining network configured to couple the high-frequency signal to the antenna, and to couple the high-frequency signal and a reflected high-frequency signal to the first detector and to the second detector. An algebraic combining network sums a first detected signal having first detected high-frequency signal and a first detected reflected signal from the first detector circuit and a second detected signal having second detected high-frequency signal and a second detected reflected signal from the second detector circuit to produce a detected output signal. The first detected reflected signal is added to the second detected reflected signal and the first detected high-frequency signal is subtracted from the second detected high-frequency signal. A controller configured to convert the detected output signal to a speed between the antenna and a target.

Abstract: A method of down-converting couples a first high-frequency signal to a first detector and to a second detector. An antenna receives a signal and the received signal is provided to at least the first detector. The high-frequency signal is detected to produce a first detected signal including a first detected high-frequency signal and a demodulated signal. The high-frequency signal is concurrently detected to produce a second detected high-frequency signal. The second detected signal is subtracted from the first detected signal so as to cancel amplitude-modulated noise on a detected signal output.

Abstract: A local area network/wide area network (LAN/WAN) switch is presented which aggregates LAN traffic onto SONET/SDH transport streams in a programmable manner. The system can concentrate Ethernet packets and map the data onto SONET streams at data rates varying from STS-1 to STS-12C. Depending on the bandwidth available in the WAN interface, different numbers and combinations of STS-n streams can be formed. The system allows for efficient and flexible mapping of LAN traffic onto a WAN for transport over fiber optic networks.

Abstract: The present invention discloses a method and apparatus for automatically provisioning data stitching circuits within a network element (NE). Data circuits are defined as the interface cards within NE that are receiving a particular data stream. Data stitching circuits are defined as data circuits that are provided with a destination point and a next destination point for each interface card. The NE creates a data-stitching matrix that identifies a path (i.e., destination and next destination) for the data stream to follow. The matrix is used by a cross-connect to reroute the data stream around one or more inoperable interface cards. When interface cards within the NE request to be provisioned into or out of a data stitching circuit the NE automatically updates the data-stitching matrix.

Abstract: The present invention discloses a method and apparatus for rerouting high-speed telecommunications signals within a network element (NE). Data circuits are defined as the interface cards within the NE that receive a particular data stream. In the event that one or more of the interface cards associated with a particular data circuit is removed, the NE can reroute the data stream so that the data circuit is maintained. The rerouting is accomplished by creating a stitching table, which defines the previous stitch and next stitch for each port on a cross-connect unit. Thus, when one stitch is lost, the table enables the apparatus to reroute the data stream around the lost stitch. That is, the data circuit is stitched together when one or more elements of the data circuit are removed.

Abstract: A local area network/wide area network (LAN/WAN) switch is presented which aggregates LAN traffic onto SONET/SDH transport streams in a programmable manner. The system can concentrate Ethernet packets and map the data onto SONET streams at data rates varying from STS-1 to STS-12C. Depending on the bandwidth available in the WAN interface, different numbers and combinations of STS-n streams can be formed. The system allows for efficient and flexible mapping of LAN traffic onto a WAN for transport over fiber optic networks.

Abstract: The present invention discloses a method and apparatus for automatically provisioning data stitching circuits within a network element (NE). Data circuits are defined as the interface cards within NE that are receiving a particular data stream. Data stitching circuits are defined as data circuits that are provided with a destination point and a next destination point for each interface card. The NE creates a data-stitching matrix that identifies a path (i.e., destination and next destination) for the data stream to follow. The matrix is used by a cross-connect to reroute the data stream around one or more inoperable interface cards. When interface cards within the NE request to be provisioned into or out of a data stitching circuit the NE automatically updates the data-stitching matrix.

Abstract: The invention provides method and apparatus for identifying signals for a set of communication devices in a signal stream having signals for a number of different sets of communication devices. Some embodiments of the invention are methods and devices for extracting signals for a first set of communication devices from a signal stream having signals for a number of different sets of communication devices. Other embodiments of the invention are methods and devices for inserting into a signal stream signals from a first set of communication devices. Yet other embodiments of the invention are time division multiplexing and demultiplexing methods and apparatuses that use a content addressable memory to identify sets of signals for a particular set of communication devices. In addition, some embodiment of the invention are used in fiber optic telecommunication networks. These embodiments include an optical network unit that receives an integrated signal stream having signals for different types of applications.

Abstract: A method for transmitting data packets, grouped as data octets, over a LAN having a central hub linked to each of a plurality of network nodes via a physical medium consisting of four pairs of unshielded twisted pair (UTP) cable. The transmission method sequentially divides the data into data quintets. The quintets are then arranged into blocks of data quintets and sequentially distributed into four individual serial code streams. The four serial code streams are sequentially scrambled to produce four streams of randomized quintets. The randomized data streams are sequentially block encoded into 6-bit symbol data which are then transmitted using NRZ modulation across the network by transmitting each data stream over one of said pairs of cable.

Abstract: A method provides for a first network node in a plurality of network nodes to transmit a data packet to a hub. The hub and the network nodes are interconnected within a local network system. Control signals are exchanged between the first network node and the hub. The exchange of control signals is done in a first signal frequency range. A data packet is sent from the first network node to the hub. The data packet is sent using data signals within a second signal frequency range. The first signal frequency range and the second signal frequency range do not overlap.

Abstract: A method provides for a first network node in a plurality of network nodes to transmit a data packet to a hub. The hub and the network nodes are interconnected within a local network system. Control signals are exchanged between the first network node and the hub. The exchange of control signals is done in a first signal frequency range. A data packet is sent from the first network node to the hub. The data packet is sent using data signals within a second signal frequency range. The first signal frequency range and the second signal frequency range do not overlap.

Abstract: A network system includes end nodes which are connected to a plurality of cascaded hubs. A two priority protocol is provided for selecting end nodes to send network packets over the network. When at least one end node in the network system has a high priority network packet to send, each end node with a high priority network packet is acknowledged in turn. Each end node, when acknowledged, sends its high priority network packet through the network. When no end nodes have a high priority network packet, and at least one end node in the network system has a normal priority network packet to send, each end node with a normal priority network packet is acknowledged in turn. This includes a root hub acknowledging in turn each second level hub which is connected to an end node which has a normal priority network packet to send. Each second level hub, when acknowledged, proceeds to acknowledge in turn each end node which is connected to the second level hub and which has a normal priority network packet.

Abstract: A method for transmitting data packets, grouped as data octets, over a LAN having a central hub linked to each of a plurality of network nodes via a physical medium consisting of four pairs of unshielded twisted pair (UTP) cable. The transmission method sequentially divides the data into data quintets. The quintets are then arranged into blocks of data quintets and sequentially distributed into four individual serial code streams. The four serial code streams are sequentially scrambled to produce four streams of randomized quintets. The randomized data streams are sequentially block encoded into 6-bit symbol data which are then transmitted using NRZ modulation across the network by transmitting each data stream over one of said pairs of cable.