Abstract: A radio frequency transmission module is adapted to generate a first signal to be transmitted and to convert the signal to a radio frequency carrier for its radio transmission, in an operational phase, and is adapted to generate a second signal and to convert the second signal to the radio frequency carrier, in a calibration phase. The module includes a calibration unit having a subsampler adapted to subsample the second converted signal and a calculation unit adapted to calculate Fourier Transform coefficients representative of the signal delivered by the subsampler, for the purposes of processing the first signal to be transmitted, in the operational phase, as a function of at least some of the Fourier coefficients calculated in the calibration phase.

Abstract: In a transmitter or transceiver, codewords from HARQ processes can be mapped or assigned to various layers for transmission and/or retransmission of information on a radio channel. Exemplary embodiments provide for various mappings which facilitate, for example, HARQ processes. For example, a codeword can be mapped onto a plurality of layers which are equal in number to a channel rank of a radio channel to be used for the transmission.

Abstract: An entire radio transceiver can be completely integrated into one IC chip. In order to integrate the IF filters on the chip, a heterodyne architecture with a low IF is used. A single, directly modulated VCO is used for both up-conversion during transmission, and down-conversion during reception. Bond-wires are used as resonators in the oscillator tank for the VCO. A TDD scheme is used in the air interface to eliminate cross-talk or leakage. A Gaussian-shaped binary FSK modulation scheme is used to provide a number of other implementation advantages.

Abstract: High power, low degree of polarization superluminescent diodes (SLDS) are described. A semiconductor optical amplifier (SOA) which amplifies light in substantially one polarizaton state can be used to create a SLD by combining the output from both sides of this polarization sensitive SOA in a manner which results in a depolarized output.

Abstract: A tuning arrangement in a radio receiver includes a front-end circuit having a tunable band-pass filter that is capable of tunably selecting channels within at least one frequency band of an RF signal. A noise source coupled to an input of the tunable band-pass filter introduces a wide-band noise signal into the front-end circuit. A signal detector coupled to an output of the front-end circuit measures at least one signal power associated with a filtered noise signal derived from the wide-band noise signal. A tuning controller, coupled to the tunable band-pass filter by a tuning control signal, adjusts the tuning control signal in response to the at least one measured signal power for tuning the tunable band-pass filter to a desired filter response.

Abstract: A status reporting system (SRS) automatically reports updated status of a project to an interested party based on status information stored in a status system. The SRS is communicatively coupled to the status system and includes a monitoring device that contacts the status system to determine whether such status system has new status information stored therein and obtains such new status information from the status system. An internal mail device receives the obtained status information, ascertains from the received status information the interested party, locates an electronic mail address for the interested party, formats the received status information into a piece of electronic mail which includes the received status information and the located electronic mail address, and forwards the piece of electronic mail to the interested party by way of an electronic mail service.

Abstract: A method and apparatus for token distribution include providing one or more nodes of a plurality of network nodes with a token machine that includes counters associated with each of other network nodes having a token machine. Each time a token possessing network node implicitly or explicitly passes the token to another network node having a token machine, counter values of each of the counters associated with each node having a token machine are adjusted. When a token is passed, the counter value of the receiving node is adjusted based, at least in part, on an initial token interval value, and counter values associated with other nodes are adjusted toward a threshold value. The decision as to where the token is passed may be based, at least in part, on the value of a counter and/or an assigned counter priority level.

Abstract: The present invention helps to mitigate and reduce the amount of interfering signals (e.g. RF leakage) that enter the phase detector of a phase locked loop by acting as a less than perfect sampler. This is accomplished by introducing a time jitter to the signal edges that enter the phase detector input. A phase detector can also be made to act as a less than perfect sampler by intentionally introducing an interfering signal. For example, a small interfering analog signal can be introduced with a different frequency from the reference frequency already present in the PLL. The interfering signal will cause the stable internal signal to vary slightly in time at the rate of the interfering signal frequency. It is this signal variation and jitter introduced on the signal edges entering the phase detector input that induces the phase detector to act as a less than perfect sampler.

Abstract: A method of estimating a DC offset value of a signal includes estimating a DC offset value of a preamble part of the signal using a pair of diodes (D1, D2) and a resistor (R) connected in parallel. During receipt of the data part of the signal, the diode pair (D1, D2) is switched out of the circuit by a switch (SW). During reception of the data part, the DC level is estimated using a low pass filter (R,C).

Abstract: Multiple circuits connected to a common terminal are switched where the frequency bands to be conducted through the circuits are close. Each circuit has an independent signal path to the common terminal which contains a filter and a device. Each device has a first and a second state. Each circuit has a first filter characteristic that passes a first frequency band and substantially blocks the second frequency band. Each circuit has a second filter characteristic which substantially blocks the first and second frequency bands when the device is in the second state, wherein the second filter characteristic is a result of the device and a filter acting in combination. As a result, the frequency multiplexer can have multiple frequency bands in a narrow frequency range connected to a common terminal with minimum signal loss.

Abstract: A method and apparatus are provided for changing the pitch of a tabulated waveform in wavetable based synthesizers. Harmonics that normally would be aliased before a transposition process are removed by a discrete time low pass filter at the same time that the tabulated waveform is reconstruction and resampling.

Abstract: A codeword is generated for transmission in a communications system by generating a first error detection code from information bits, and generating a second error detection code from the information bits and the first error detection code. The information bits, the first error detection code and the second error detection code are then concatenated. The codeword is received by using the first error detection code to make a first determination whether the information bits are error-free, and using the second error detection code to make a second determination whether the information bits and the first error detection code are error-free. The information bits are accepted only if the first determination indicates that the information bits are error-free and the second determination indicates that the information bits and the first error detection code are error-free. The technique is extendable to include additional error detection codes.

Abstract: A mobile application running in a mobile device may be coordinated or synchronized with a non-mobile application running in a non-mobile device. The mobile and non-mobile applications may be, for example, calendar applications. To permit the use of a session-oriented (connection-oriented) protocol stack when the transmission medium between the mobile and non-mobile devices is connectionless, the mobile device sends an initial communication to the non-mobile device. In response to receipt of the initial communication, a session identifier is generated. A first connection-oriented protocol frame is then formed that includes an initial response and the session identifier. The first connection-oriented protocol frame is embedded in a first connectionless protocol frame, and the first connectionless protocol frame is sent to the mobile device. Although the mobile device initiates the session, the session is controlled by the non-mobile device.

Abstract: Methods and systems for transmitting attachments to text messages without turning terminals into e-mail clients are described. When an attachment is to be transmitted, an address of an attachment server is appended to the text message. The text message is then forwarded to the intended recipient, e.g., via an SMS server, while the attachment is sent to the attachment server. Upon receipt of the text message, the recipient can then download the attachment from the attachment server using the address included in the text message.

Abstract: A method and apparatus for processing a received signal containing a desired burst and a co-channel interferer burst are disclosed. The invention includes receiving the received signal from a front end receiver. A time offset between the desired burst and the co-channel interferer burst is detected. A detection procedure is then selected based on the time offset between the desired burst and the co-channel interferer burst. Preferably, one of three detection procedures is selected based on the time offset detected and optionally the signal strength of the co-channel interferer burst. If a first or second time offset is detected, then a joint detection or an iterative detection procedure is selected and performed, respectively. Finally, if a third time offset is detected or if the co-channel interferer has a low signal strength, then a conventional detection procedure is selected and performed.

Abstract: A cooling apparatus attaches to a cabinet housing electronics for protecting the electronics from external elements. The cooling apparatus includes an exterior surface for exposure to the external elements and a coupling that attaches the exterior surface to the cabinet. When the cooling apparatus is attached to a surface of the cabinet, the exterior surface is maintained in a spaced-apart relationship from the cabinet, forming an enclosed channel having a pair of openings, one of the openings being located above the other. In such a manner, the cooling apparatus can be added to cool an existing, installed, in-place cabinet without requiring extensive modification to the existing cabinet.

Abstract: The volume of a loudspeaker in a telephone is automatically adjusted according to the ambient noise at the telephone location. During a predetermined time window which exists during the initial period of a telephone call, the ambient noise is measured, and the volume of the loudspeaker adjusted accordingly. For example, the time period may exist between the time when the telephone goes off-hook, until the time when the handset is placed near the ear. Adjusting the ambient noise during this period has the advantage of not having to filter out the user's speech, as would be the case when measuring the ambient noise while the user is speaking. Furthermore, there is no requirement for circuitry which detects gaps in speech.

Abstract: A method of and apparatus for accelerating data retrieval on a widely dispersed content distribution network such as the World Wide Web. The system associates a concept URI with a resource which can then serve as a reference for a group of resources. When the system receives a request from a client calling for a resource in this group, it prepares a delta encoded responses based on the difference between the reference document and the response it has obtained from an origin server (the identity response). The system then sends the client the delta encoded response, an identification of the reference document used to prepare the delta encoded response, and an address where the reference document may be obtained if a client does not already have a copy.

Abstract: A method stores, indexes, searches and retrieves data information in a large data storage and retrieval system. Large amounts of data information, subject to searching and retrieval, are broken down and stored in sub-collections. Each sub-collection separately performs indexing of only the data information contained within that sub-collection and forms an inverted index. Statistical information derived from the inverted index of each sub-collection is collected by a global collection custodian and compiled into a global index. The global index is then passed to each sub-collection and is used by each during searching and retrieving of data information. Search results from each sub-collection are passed to the global collection custodian and organized there before being passed to a system user.

Abstract: A new communication distribution platform for a customer premise creates a new paradigm where components from the physical layer are shared, components from the MAC layer are shared, and a common network layer is used. A single modulation unified system and shared MAC is used across multiple media. Varied implementations may chose to share only physical layer components, or MAC layer components, or both. One implementation disclosed is the use of a common physical layer modulation combined with a MAC layer with many common functions in support of delivery of IP based services within the premises. This combination optimizes customer experience, flexibility in use, provides simpler maintenance, and simpler reduced inventory requirements and operations support for service suppliers. It can be used to support either a circuit switched environment or packet switched environment.