Abstract: Residual echo components resulting from an adaptive echo canceler are minimized by employing a subband echo suppressor. The residual echo components are minimized by individually, controllably adjusting the echo suppressor attenuation level in each of the subbands to gradually attenuate echo peaks having a magnitude lower than a clipping threshold with the magnitude of the attenuation increasing for residual echoes of decreasing magnitude. Additionally, the threshold of suppression engagement is dynamically matched to the signal gain in the echo path for each subband. If the signal gain in a subband is high (strong echo), the suppressor must attenuate residual echo peaks in the subband of higher energy to maintain a constant quality of service.

Abstract: A method and apparatus are disclosed for automatically determining system configuration information, including the sector, carrier frequency and bus assignment of each hardware component installed on equipment, such as a cell station. In an illustrative cell station implementation, each cell station includes a hardware controller that communicates on a common bus with a plurality of hardware components. When each cell station is powered up or reset, each hardware component reads an identification value (or a portion thereof) that has some physical significance from a backplane on which the hardware component is installed. The identification information obtained from the backplane is used to derive a bus address that uniquely identifies each hardware component on the common bus. In addition, the identification information contains information that describes the hardware component and how the component is located within the cell station.

Abstract: Apparatus for specifying invocations in compiled objects at runtime. One species of the apparatus is a drawing widget for use in the X Window System. The drawing widget permits users to specify elements in the window corresponding to the widget by providing a sequence of invocations of X Window graphics functions to the widget at runtime. A resource in the drawing widget is set to the sequence of invocations and when the corresponding window is exposed, the invocations in the sequence are executed to produce the elements in the window. The sequence of function invocations may include invocations for functions which add or remove elements from the window and which translate, rotate, or scale elements. Other features include the use of unit coordinates in the invocation and the use of hashing to reduce the character-string invocations provided in the sequence to representations made up of small integer, pointer, and floating-point data.

Abstract: A method and apparatus for deriving performance statistics from real time tracking of a sporting event. The method according to the present invention includes a step of obtaining a spatio-temporal trajectory corresponding to the motion of an athlete and based on real time tracking of the athlete. The trajectory is then broken down so that performance information corresponding to the motion of the athlete (such as speed, distance covered, acceleration, etc.) can be derived with respect to time. The information so obtained can be stored in a database or the like for later retrieval or can be used to graphically supplement a video broadcast of a sporting event. The apparatus includes a device for obtaining the trajectory, a computational device for obtaining the performance information based on the obtained trajectory, and a statistical device for compiling the performance information.

Abstract: A system and method for utilizing suppressed ringing with a plurality of communication devices. The system creates a suppressed ringing signal, at a remote computer, for at least one of the plurality of communication devices, implements a protocol to direct the suppressed ringing signal to the communication device through a private network and transmits the suppressed ringing signal from the remote computer, through the private network, to the communication device.

Abstract: In accordance with the invention, a MEMs mirror device comprises a mirror layer including a frame structure and at least one mirror movably coupled to the frame and an actuator layer including at least one conductive path and at least one electrode for moving the mirror. The mirror layer and the actuator layer are provided with metallization pads and are bonded together in lateral alignment and with predetermined vertical gap spacing by solder bonds between the pads. The device has utility in optical cross connection, variable attenuation and power gain equalization.

Abstract: An opto-isolator incorporating a MEMS device includes an optical signal source and an optical signal detector defining therebeween an optical path for communication of optical signals. A MEMS device having an actuator for controlling a moveable element is disposed between the source and detector for manipulating the optical signals. In one embodiment, the moveable element is a shutter which is operable to selectively allow optical signals to be received by the detector and prevent signals from being detected. In another embodiment, the moveable member is a MEMS tilt mirror for selectively directing optical signals to the detector.

Abstract: A method and system for a communication system with a communication center, a communication site, a user station and a remote unit allowing the communication center to communicate with the user station over a user channel and communicate with the remote unit over a system channel such that the communication center can monitor, operate or control the remote unit on as needed basis.

Abstract: A virtual logic system for solving satisfiability problems on reconfigurable hardware, such that the reconfigurable hardware can be used to solve problems much larger than its available capacity. In an illustrative embodiment, a set of reconfigurable hardware including a number of field programmable gate arrays (FPGAs) is configured to solve a satisfiability problem. The satisfiability problem is decomposed into a number of independent and disjoint subproblems, e.g., using a simple decomposition in conjunction with disjoint partitioning, such that each of the subproblems is implementable within a given one of the FPGAs without the need for any inter-FPGA communication. Each FPGA then independently determines a satisfiability indication for one of the subproblems. At least a subset of the FPGAs may each be used to process more than one of the subproblems.

Abstract: A method for increasing the interrogation range of an RF Tag in a radio communication system using RF Tags with multiple reflecting antenna elements. The reflecting antenna elements are predeterminately positioned, and preferably aligned, with respect to each other in the direction of expected incident RF radiation. The reflecting antenna elements are sequentially pulsed on and off such that while the first reflecting antenna element is in a signal reflecting operating state, the remaining reflecting antenna elements are in a substantially non-reflecting state, and when the second reflecting element is in a reflecting operating state, the remaining reflecting elements are in a non-reflecting state, etc. The sequential pulsing and predetermined fixed spacing between the reflector elements generates constructive interference between the reflected signals of the reflecting antenna elements which increases the power of the resulting reflected signal.

Abstract: The present invention is a more accurate system for estimating the location of a mobile-telephone without significantly increasing the interference level for other mobile-telephones in the same or neighboring cells. In one embodiment, the present invention uses a plurality of location terminals deployed throughout a cell to increase the chances of detecting line-of-sight signals and the signal-to-noise ratio at the location terminals. In this embodiment, a wireless communication network transmits receive information to the plurality of location terminals instructing each of the location terminals to receive a signal from a particular mobile-telephone. Specifically, the location terminal is instructed to monitor a specific communication channel during a specific time interval.

Abstract: A wavelength converter with a monolithically integrated delay loop in a delayed interference configuration that needs only one SOA, only one in and one output fiber. Unlike prior-art hybrid wavelength converters, our inventive device has a monolithically integrated delay loop utilizing an asymmetric splitting ratio.

Abstract: Multiple microcell base stations are located within a macrocell having single macrocell base station in an hierarchical architecture, and microcell users (&mgr;-users) and macrocell users (M-users) communicate respectively with the &mgr;-base and the M-base using the same frequency band, by appropriately (a) selecting the ratio of the radius r of each &mgr; cell and the average distance d from the M-base (r and d are measured by the “radio distance”, which includes the effects of shadowing), and (b) controlling the power level with which uplink (mobile to base) and downlink (base to mobile) messages are communicated. Typically, &mgr;-cell size and location are chosen such that d/r>10. With respect to uplink communications, the transmit powers of the &mgr;-users in a &mgr;-cell are controlled so that the total received power at the nearest M-base is equivalent to the received power from C M-users, where C is usually set to unity.

Abstract: The specification describes an alignment and attachment process for coupling optical components, such as lasers and photodiodes, to fiber pigtails. The alignment function is shared between two separate pieces of equipment, an alignment tool, and an alignment/attachment tool. Throughput for the alignment/attachment tool, typically an expensive tool, is increased by performing preliminary alignments using the less expensive alignment tool. The preliminary alignment generates coordinates for the position of the optical axis in optical components. These coordinates are transferred to the alignment/attachment tool thus reducing the portion of the time budget in the alignment/attachment apparatus that needs to be devoted to the alignment function. Thus at least a part of the time consuming alignment operations are done in parallel with the alignment/attachment process.

Abstract: A wireless communication service network includes a message processing system with at least two programmable application processors (APs) providing operational, administrative and maintenance support for one or more cell base stations in the network serving one or more wireless radio units. Improved control of the AP message processing resources is provided in response to an AP shutdown condition. In accordance with the improvement, an initial overload control (OLC) threshold is set for the APs, and the APs are monitored during their operation as they perform message processing. In the event that one of the APs becomes non-operational (non-operating AP), the OLC threshold relative to one or more remaining operational APs is dynamically increased.

Abstract: A programmable resistive-capacitive filter circuit enabling on-chip digital control of the frequency response includes a switched resistive type voltage divider network where one of the resistors forms an element of an RC filter and wherein the voltage divider additionally provides a DC bias on an output terminal. One preferred embodiment of the invention is directed to a programmable bandpass filter including MOSFET type semiconductor devices which are utilized as switched resistive elements of the filter.

Abstract: A paging method for information retrieval from broadcast disk systems is described. In response to a page request (e.g., a request for an item of data), the method selectively stores and evicts, in and from a fast memory, pages of data broadcasted by the broadcast disk system. The methods proceeds using a three-“color” labelling scheme, wherein the label assigned to a broadcasted page is based on how recently a given page was last requested. If a requested page is stored in fast memory, then the request is immediately served. If the requested page is not stored in fast memory, the request cannot be served until the requested page is broadcasted. While waiting for the requested page to be broadcasted, certain “somewhat-recently” requested pages are “prefetched,” wherein they are stored in fast memory even though there is no pending request for such pages.

Abstract: A cache implements bank-by-bank locking to keep critical code from being flushed out of the cache. A register is maintained to rank the banks from the most recently used to the least recently used. Ordinarily, when code needs to be moved into the cache, the least recently used bank is flushed, the code is moved into that bank, and the register is updated to identify that bank as the most recently used. However, if a bank is designated in a bypass vector as being locked, that bank is bypassed in the maintenance of the register and is thus never identified as the bank to be flushed.

Abstract: In addition to aligning a first unit for proper forward link communications in a wireless environment, there is a method of alignment where a reverse link signal is transmitted from the first unit to a second unit, so that the first unit may be positioned based on at least one signal quality parameter measure contained in a forward link signal reply to the reverse link signal. The method enables an installer to verify signal quality in both the forward link and reverse link directions by reviewing indications of received signal strength for both the reverse link and forward link directions on an LED display, so as to position the first unit for achieving acceptable signal strength in both directions.

Abstract: The apparatus, method and system of the present invention provide for cross-speaker speech recognition, and are particularly suited for telecommunication applications such as automatic name (voice) dialing, message management, call return management, and incoming call screening. The method of the present invention includes receiving incoming speech, such as an incoming caller name, and generating a phonetic transcription of the incoming speech with a speaker-independent, hidden Markov model having an unconstrained grammar in which any phoneme may follow any other phoneme, followed by determining a transcription parameter as a likelihood of fit of the incoming speech to the speaker-independent model.