Abstract: A system (242) processes asymmetric digital subscriber line (ADSL) signals. The system (242) receives a signal that includes an ADSL signal and transient noise (230). The system (242) isolates the transient noise (230) in the signal and retrieves the ADSL signal from the signal using the isolated transient noise (230).

Abstract: A burst of data in a wireless network includes a preamble [502], a postamble [504] and one or more blocks of data [506]. A low or no power receiving device [102] receives the preamble [502]. When the preamble [502] includes an ID of the receiving device, structural information of the burst is derived from the preamble [502], indicating when at least one component of the device is to be powered on to receive the at least one block of data [506] included in the burst. The at least one component [306, 308, 310] is powered on at a first time period in order to receive the data in the one or more blocks of data. The at least one component [306, 308, 310] is powered off at a specific time period from a beginning of the first time period. The powering on and off are repeated for each of the one or more blocks of data [506] in the burst.

Abstract: The selection of multiple, suitably designed, demodulation reference signals can enable the measurement of a vehicle's speed using continuously transmitted frequency modulated (CTFM) signals. The unique solution of vehicle speed can be used to resolve the range Doppler ambiguity found in conventional CTFM sonar and radar systems. This can enable continuous range and speed estimates of high-speed vehicles with an attendant reduction in transmit power relative to pulse-echo systems with similar measures of performance due to the 100% duty cycle.

Abstract: The disclosure describes techniques for determining the response characteristics of a system. One such technique includes applying a series of M vector probe input signal sets of a form {overscore (V)}m x(t) to the system, wherein {overscore (V)}m is an m-th column of a matrix V and x(t) is a scalar input signal. The response signals {overscore (y)}t are measured and a single-input system {overscore (F)}m(z) is determined by considering the approximate relationship {overscore (y)}z?{overscore (F)}m(z)x(z), where {overscore (F)}m(z) is an m-th column of a matrix F(z). The system characteristics can be determined from the relationship H(z)=F(z)V?1, where V?1 denotes the right-matrix-inverse of the matrix V. The matrix V may be a matrix with mutually orthogonal rows, or may have entries consisting of plus one and minus one values, or may be a portion of a Hadamard matrix.

Abstract: A system (510) routes packets in a network (200) having multiple nodes. The system identifies a group (500) of the nodes (520–550) and determines routing distances to each of them. The system (510) then selects a set of the nodes from the group (500) based on the determined routing distances and updates a routing table based on the selection. The system (510) routes packets through the network (200) using the updated routing table.

Abstract: The invention relates to information extraction systems having discriminative models which utilize hierarchical cluster trees and active learning to enhance training.

Abstract: A computer system includes an input device (210) and at least one processor (205). The processor receives (600) an electronic document that includes data representing a telephone number. The processor further receives input via the input device selecting (615) a telephone number from the electronic document. The processor additionally signals (725), via a packet-switched network, a telecommunication system to connect a call between the telephone number and a calling party telephone number in response to the selection of the telephone number.

Abstract: A method, a node and a machine-readable medium are provided for dynamically adjusting a beam of an adaptive antenna array (302). A receiving node (101) receives, via a group of antenna array elements (302), a signal from a transmitting node (101). Each received signal from the antenna array elements (101) is digitized and recorded. K+1 output signals are generated from the recorded digitized signal. The k+1 output signals are generated by applying each of a group of weight sets to the recorded digitized signal. Each of the weight sets corresponds to a different one of k known neighboring nodes (101) and a weight set for generating an omnidirectional propagation pattern. Which one of the k+1 output signals to process is determined. The determined one of the k+1 output signals is processed and the packet encoded in the determined one of the k+1 output signals is decoded.

Abstract: A network processor [200] performs Cyclic Redundancy Check (CRC) operations using specialized hardware circuits [308-308]. The network processor [200] includes a plurality of hardwired CRC polynomials that are used to implement the CRC operations. A CRC instruction selects which polynomial to use when performing the CRC operation.

Abstract: Systems and methods for locating the shooter of supersonic projectiles based on shockwave-only measurements are described. Muzzle blast signals are neither sought nor required. The system uses at least five, preferably seven, acoustic sensors that are spaced apart at least 1 meter. The sensor signals are acquired with a time resolution in the order of microseconds and processed to find and disambiguate the shockwave arrival angle unit vector. Two different Time-Difference-Of-Arrival (TDOA) measurement techniques are described, with one technique using counters in each signal channel and the other technique using cross-correlation between signal channels. A genetic algorithm can be used to efficiently disambiguate the results.

Abstract: The invention relates to communications devices for reduced energy communications in an ad hoc network. The communication device includes a first low-powered transceiver for initiating communications with other communications devices and a second transceiver for transmitting data messages to the other communications devices once communication is initiated. The communication device also includes a communications control processor for determining times at which the other communications devices will be available to receive communications based on scheduling data received from those communication devices. The communications control processor can also take into account requests for reserved bandwidth.

Abstract: A wireless network [100] includes a number of first wireless terminals configured to operate as cluster heads [110] by communicating with at least one other cluster head over a relatively long range backbone link [115]. Each one of the first wireless terminals includes a backbone transceiver. The backbone transceivers may operate in a first frequency range. At least one second wireless terminal is configured to operate as a cluster member [120] by communicating with an associated cluster head over a local link. Each one of the second wireless terminals includes a cluster transceiver. The cluster transceivers may operate in a second frequency range that is different from the first frequency range of the backbone transceivers. At least one of the first and second wireless terminals includes both a backbone transceiver and a cluster transceiver.

Abstract: A data-display system employs a display in which the representations of data objects are caused to move on the display in order to convey information about the represented data objects. In one example, icons in a link-analysis display that represent data objects satisfying a selection criterion are made to execute distinctive motion. In another example, three-dimensional models of moving bodies in whose features components of respective data objects are encoded are projected onto a screen plane, and the resultant values are used to generate the display.

Abstract: A data-display system employs a display in which the representations of data objects are caused to move on the display in order to convey information about the represented data objects. In one example, icons in a link-analysis display that represent data objects satisfying a selection criterion are made to execute distinctive motion. In another example, three-dimensional models of moving bodies in whose features components of respective data objects are encoded are projected onto a screen plane, and the resultant values are used to generate the display.

Abstract: A system adjusts audio levels so as to maintain a constant perceived audio level at a user's location. The system includes a sensor (110) and an audio device (120). The sensor (110) receives a first audio signal, receives at least one data packet (1000) comprising a second audio signal, determines whether a difference between an average volume level of the first audio signal and the second audio signal exceeds a threshold value, generates a response data packet (1200) including a volume adjustment command when the difference between the average volume level of the first audio signal and the second audio signal exceeds the threshold value, and transmits the response data packet (1200). An audio device (120) transmits the first audio signal, transmits the at least one data packet (1000) to the sensor (110), receives the response data packet (1200), and adjusts an audio level based on the response data packet (1200).

Abstract: A manager node (105) controls access to a shared network communication medium by a number of nodes. A first node (101) transmits a request to the manager node (105). The request includes information indicating that the first node (101) requires a QoS link to a second node. The manager node (105) determines whether the QoS link from the first node (101) to the second node can be supported and sends an accept message to the first node (101) when the QoS link can be supported. Prioritized media access control may also be used in a distributed network without using a manager node to control access to a shared communication medium. A node with high priority data may reduce the duration of its contention window so that it will have a better chance of gaining control of the shared communication medium than a node with low priority data.

Abstract: Multiple network processors (201, 202, 203) are connected in a pipeline via control (206) and data (205) ports of the network processors. The network processors (201, 202, 203) communicate with neighboring network processors through the control and data ports. Through these ports, the network processors can implement a variety of data flow control protocols.

Abstract: Method for source-spoofed internet protocol packet traceback. This is an IP packet traceback technique for locating the origin of a malicious packet, even if the packet's IP source address is incorrect (spoofed). This is done by having routers lookup the source address in their routing tables, and mark the relevant entry.

Abstract: Presented herein are systems and methods for generating an adaptive noise codebook for use with electronic speech systems. The noise codebook includes a plurality of entries which may be updated based on environmental noise sounds. The speech system includes a speech codebook and the adaptive noise codebook. The system identifies speech sounds in an audio signal using the speech and noise codebooks.

Abstract: A system establishes a path for distributing data through an optical network (115). The system includes an optical switch (205a) and a data distribution endpoint (105a). The optical switch (205a) establishes a first encryption key distribution path through the optical network (115), the first encryption key distribution path including multiple optical switches and optical links. The data distribution endpoint (105a) determines whether eavesdropping has occurred on the first encryption key distribution path using quantum cryptography. The optical switch (205a) further establishes a second data distribution path through the optical network (115) responsive to the eavesdropping determination. The second encryption key distribution path includes multiple optical switches and optical links.