Abstract: A remote control device (RCD) typical of a television or home entertainment system is adapted to be communicable with a mobile phone. When a mobile phone receives a signal in a first wireless protocol from a digital cellular network (DCN), the signal is wirelessly forwarded to the RCD in a second wireless protocol for processing such as answering a voice call or displaying message data using the RCD. In addition, the RCD is wirelessly communicable with one or more peripheral devices such as a television and/or other components of a home entertainment system. The RCD can further forward the signal or a component of the signal received from the mobile phone to one of the peripheral devices for output. Thus, if a mobile phone is not handy when a signal is received, it can be passed to the RCD to be handled in a manner deemed appropriate by a user.

Abstract: Automatic test equipment (ATE) includes interleaved analog-to-digital (A2D) converters to produce digital signals, where the digital signals are used to produce an output signal, the output signal having spurs, a look-up table (LUT) to store correction values, where the correction values are for reducing the spurs in the output signal, and circuitry to apply the correction values to the output signal.

Abstract: A method of scanning channels in a digital television including (a) setting a starting frequency; (b) searching for a first available digital channel by searching a search frequency that is the starting frequency; adding a predetermined scan step to said search frequency if the first available channel is not found at the starting frequency, and adding additional predetermined scan steps to the search frequency until the first available channel is found if the first available channels is not found at the starting frequency plus the scan step; and (c) searching for a second available digital channel by searching at a first main frequency, which is the first available channel frequency plus a first predetermined bandwidth, wherein the step of searching for the second available digital channel includes searching at a plurality of scan steps around the first main frequency.

Abstract: A method and system for locating a mobile user of one or more mobile users while on a call in a wireless telecommunication network utilizes a decision network that determines if the call signal is propagating through a repeater station. When the call is propagating through a repeater station, the decision network alters the signal measurement parameters to correspond with the location of the mobile user relative to the repeater station co-ordinates. By revising signal measurement parameters to compensate for repeater stations, the present invention provides for improved position estimates of the location of the mobile user in the network. For multiple cell soft handoff conditions, the decision network utilizes trained neural networks.

Abstract: An information terminal device includes a wireless local area network (LAN) access section, a search section and a display section. The wireless local area network (LAN) access section accesses a wireless LAN. The search section searches a hot spot in or near a desire place based on a desire place data indicating the desire place. The hot spot is a place where a wireless LAN connection can be established. The desire place is a place where a user desires to access a wireless LAN. The display section displays a hot spot data indicating a place of the hot spot searched by the search section.

Abstract: A switch having a first arrangement for providing a first set of first and second complementary intermediate signals; a second arrangement for providing a second set of third and fourth complementary intermediate signals; a third arrangement responsive to the first set of signals for providing complementary output signals; a fourth arrangement responsive to the second set of signals for providing complementary output signals; and a fifth arrangement for selectively activating the third means or the fourth arrangement in response to a control signal.

Abstract: A method and system enabling roaming between different wireless networks. A mobile device supporting low and high-tier wireless network standards is adapted to roam between a low-tier wireless network and a high-tier wireless network with lower bandwidth but more mobility than the low-tier wireless network. Via a virtual GPRS support node, a plurality of data packets and control signals are delivered between low and high-tier wireless networks.

Abstract: A wireless communication method and apparatus are described for increasing security for communication devices utilizing identification chips for accessing wireless networks and the associated billing for services. One aspect of the invention is an enhanced phone chip and a communications device adapted to engage the enhanced phone chip, which then cannot be installed or removed from the wireless communications device by unauthorized users. In one embodiment a security key mates to the identification chip and is utilized for installing and removing the enhanced phone chip. The security key preferably has a display upon which information about the communication device is displayed prior to removing the security key after installing the enhanced phone chip.

Abstract: Methods and apparatus for supporting and using multiple communications channels corresponding to different transmit technologies and/or access technologies in parallel within a cell of a wireless communications system are described. Mobile nodes support multiple technologies and can switch between the technology being used at a particular point in time, e.g., from a first channel corresponding to a first technology to a second channel corresponding to a different technology which provides better transmission characteristics, e.g., a better perceived channel quality. Mobiles maintain at least two sets of channel quality information at any one point in time. Mobiles select the better channel and communicate the channel selection to the base station or communicate channel quality information for multiple channels to the basestation and allow the base station to select the channel corresponding to the technology providing the better conditions for the mobile.

Abstract: A signal converting apparatus for integrating an analog-to-digital converter (ADC) and a digital-to-analog converter (DAC) and an integration unit thereof are provided. The present invention integrates ADC and DAC, that do not operate simultaneously, into a signal converting apparatus (SCA), wherein a control signal decides whether an analog-to-digital mode or a digital-to-analog mode is selected. By sharing the operational amplifiers and other components in the SCA, the chip area and the cost are significantly reduced. In addition, in the integration unit, by switching a plurality of capacitor sets with various capacitances, the capacitance coefficients required for switching ADC and DAC are obtained.

Abstract: A circuit arrangement (10) for compensating for nonlinearities (NL1, NL2) from analog/digital converters (15, 16) operating with different timing, having at least two analog/digital converters (15, 16) which are each clocked with different timing and which each have a predetermined nonlinear converter characteristic with integral nonlinearities (NL1, NL2), and which accept an analog input signal (VIN) applied to an input (11) on the circuit arrangement and respectively convert it into a digital intermediate signal (Z1, Z2); and having a multiplexer (22) which is arranged downstream of the analog/digital converters and which successively switches through the digital intermediate signals (Z1, Z2) in order to produce a digital output signal (ZD) from the circuit arrangement (10); where at least one of the nonlinear converter characteristics of the various analog/digital converters (15, 16) is predetermined such that after the intermediate signals have been combined in the multiplexer (22) the integral nonlineari

Abstract: Programmable logic device integrated circuitry having I/O circuitry portions having different maximum speed capabilities and different amounts of programmability for supporting various I/O signaling standards is provided. High-speed I/O circuitry and low-speed I/O circuitry may be provided. The high-speed I/O circuitry may have differential I/O drivers and may not be programmable. Relatively few I/O lines may be connected to the high-speed I/O circuitry. The low-speed I/O circuitry may be programmable so that a user may configure the low-speed I/O circuitry to support different I/O signaling standards. Intermediate-speed I/O circuitry may be provided that is more flexible than the high-speed circuitry and operates at higher maximum I/O data rates than the low-speed I/O circuitry.

Abstract: A data shuffler apparatus for shuffling input bits includes a plurality of bit shufflers each inputting corresponding two bits x0 and x1 of the input bits and outputting a vector {x0?, x1?} such that a number of 1's at bit x0? over time is within ?1 of a number of 1's at bit x1?. At least two 4-bit vector shufflers input the vectors {x0?, x1?}, and output 4-bit vectors, each 4-bit vector corresponding to a combination of corresponding two vectors {x0?, x1?} produced by the bit shufflers, such that the 4-bit vector shufflers operate on the vectors {x0?, x1?} in the same manner as the bit shufflers operate on the bits x0 and x1. The current state of the bit shufflers is updated based on a next state of the 4-bit vector shufflers.

Abstract: A transform circuit includes a first circuit and a second circuit. The first circuit and the second circuit implement first and second mappings that together generate a pre-defined transform of N digital data symbols. The first circuit maps a set of N digital data symbols from N parallel data streams to N analog data symbols by generating N sets of weighted sums of the N digital data symbols. Each respective weighted sum is defined by a respective set of pre-determined weighting values in a first matrix. The second circuit maps the N analog data symbols to a sequence of N output signals over N time intervals. Each of the N output signals corresponds to a respective weighted sum of the N analog data symbols. Each respective weighted sum is defined by a respective set of pre-determined weighting values in a second matrix.

Abstract: A wide gain range current digital-to-analog converter (DAC) is presented that includes a unit current cell having a current source module biased by a current source voltage bias, a differential switch module, a main cascode module biased by a first bias voltage and an attenuation cascode module biased by a second bias voltage, configured such that a particular current gain range is obtained at the main cascode module output when a unit current cell current is at or above a current threshold. The output current at the attenuation cascode module output can be input into a current attenuator when the unit current cell current is below the current threshold to obtain additional current gain range. The current attenuator can include a plurality of attenuator cells that can be programmed to a desired level of current gain in linear decibels or linear step intervals. Smaller step sizes can be obtained by programming a current source within the step intervals.

Abstract: An integrated circuit device includes one or more calibration paths including one or more devices. A signal generator is coupled to at least one calibration path and configured to provide the calibration path with a calibration signal having known characteristics. A controller is coupled to the signal generator and the calibration path and configured to adjust the signal generator and at least one parameter associated with at least one device in the calibration path.

Abstract: The present invention relates to a converter converting an input digital signal into an output digital signal. Said converter comprises in particular a set of shift registers able to contain samples of the input or output digital signal. It also comprises a calculation unit able to supply a shift signal (4) to said set of registers. Said calculation unit comprises a first storage unit (51) able to contain a value of a conversion ratio or of its inverse, so that the value stored is between 0 and 1. It also comprises a second storage unit (52) able to contain, at a cycle time i+1, i being an integer, a future signal (8) equal to a sum of a current signal (7) contained in the second unit at a cycle time i and of the content of the first storage unit. The shift signal then results from an exclusive OR function (54) between a most significant bit of the current signal (71) and a most significant bit of the future signal (81).

Abstract: A method and system of lossless compression of integer data using a novel backward-adaptive technique. The adaptive Run-Length and Golomb/Rice (RLGR) encoder and decoder (codec) and method switches between a Golomb/Rice (G/R) encoder mode only and using the G/R encoder combined with a Run-Length encoder. The backward-adaptive technique includes novel adaptation rules that adjust the encoder parameters after each encoded symbol. An encoder mode parameter and a G/R parameter are adapted. The encoding mode parameter controls whether the adaptive RLGR encoder and method uses Run-Length encoding and, if so, it is used. The G/R parameter is used in both modes to encode every input value (in the G/R only mode) or to encode the number or value after an incomplete run of zeros (in the RLGR mode). The adaptive RLGR codec and method also includes a decoder that can be precisely implemented based on the inverse of the encoder rules.

Abstract: An analog-to-digital conversion apparatus includes a register group, a selecting section and an A/D conversion section. The register group has a plurality of registers holding a plurality of channel specification data, respectively. The selecting section is connected with a plurality of analog channels, and sequentially selects the plurality of analog channels for analog-to-digital (A/D) conversion continuously without any idling time based on the plurality of channel specification data held by the plurality of registers. The A/D conversion section carries out the A/D conversion of an analog signal on each of the analog channels selected by the selecting section into a digital signal.

Abstract: Disclosed is a method for determining a wireless communication system by selecting a wireless communication system without considering a corresponding service area. The method includes the steps of: a) if there are any available wireless communication system having identical system type, selecting a wireless communication system having highest priority in the PRL by searching wireless communication system in the first service area and a plurality of second service areas neighbored to the first service area and comparing priories of wireless communication systems in the first service area and second service areas; and d) if there are not any available wireless communication system having identical system type, selecting a wireless communication system having highest priority in the PRL by searching wireless communication system in a plurality of second service areas neighbored to the first service area.