Abstract: The pulse-shaping look-up table with transient suppression (530) avoids hard turn-on and turn-off transients by modifying word segments of initial and final digital words during transmission of a digital data sequence. A controller (570) sends a mode signal and a digital data sequence to the pulse-shaping look-up table with transient suppression (530). A mode buffer and command block (560) uses the mode signal to control the creation of initial and final digital words created by a data buffer and control block (550) from the digital data sequence. The digital words are used by a look-up table (540) to create a sampled digital output waveform sequence. The pulse-shaping look-up table with transient suppression (530) provides an accurate output waveform sequence with reduced spectral emissions even during start-up and shut-down of digital data transmissions.

Abstract: The invention relates to a method for estimating time of arrival of radio signals in particular as used for location determination. A known method of determining the location of a subscriber unit (401) calculates a number of ranges based on the distance from base stations (403,405,407) with known location. The ranges are calculated from time of arrival estimates of the signals from the different base stations but a significant source of error is the multipath signal components typical in for example cellular mobile communication systems. According to the invention, the effect of multipath is mitigated by selecting a subset of signals based on a time of arrival estimate of each of the signals. An averaged time of arrival estimate with improved accuracy is then determined from the selected subset. A typical use of the invention is for location determination in a cellular mobile communication system.

Abstract: A method in a code division multiple access communication system having network infrastructure and a plurality of mobile terminals, including transmitting (210) composite signal comprising a synchronization signal and another non-orthogonal signal from the network infrastructure, receiving (220) the composite signal at the plurality of mobile terminals of the code division multiple access communication system, and increasing forward link capacity of the code division multiple access communication system by canceling (230) the synchronization signal from at least some of the plurality of mobile terminals.

Abstract: A self configuring multiple element portable electronic device (100) and method is provided. The device comprises at least a first electronic element (104) and a second electronic element (106) and a joint (112) connecting the first electronic element and the second electronic element, with the joint allowing movement in more than one plane of the first electronic element in relation to the second electronic element, wherein the self configuring multiple element portable electronic device is capable of self configuring an operational mode based on a relative position of the first electronic element with respect to the second electronic element. The method comprises the steps of detecting a relative position of the first electronic element relative to the second electronic element, and selecting an operational mode of the device based on the relative position.

Abstract: A speakerphone accessory (100) is provided for use with a portable telephone (102). The speakerphone accessory (100) has a high-level speaker assembly (222) that includes a transducer (500) coupled to first and second resonators (502, 504). The first and second resonators (502, 504) are designed so that the first resonator (502) is most efficient at a high frequency while the second resonator (504) has maximum response at a low frequency. The frequency ranges produced by the first and second resonators (502, 504) overlap to reproduce frequencies between the high and low frequencies. The high-level speaker assembly (222), therefore, provides an acoustic bandpass having improved response when compared to the response of the transducer (500) alone.

Abstract: A method and apparatus for controlling incoming power to a receiver in a dual mode communication device. According to the method and apparatus, the received signal is simultaneously processed by two separate filters, one filter to process the incoming desired communication signal and the other filter to process the noise for power estimation. With the communication device operating in a first mode initial filtering is attuned to the corresponding bandwidth. When the noise level reaches a predetermined level, the first bandwidth is adjusted to get a better estimate of the noise present. In Response to high noise levels, the incoming gain to the receiver is adjusted accordingly.

Abstract: A novel retractable antenna which enables dual-band operation in two different positions of the antenna is described. Further, the novel retractable antennas are couple to a variety matching circuit arrangements according to various embodiments of the present disclosure to eliminates the use of electrical or mechanical switching of two different matching circuits.

Abstract: A dispatch system generally provides a means for collecting destination information, selecting a dispatch assignment (104) to be dispatched to the destination (102) and dispatching the selected assignment. In situations where the response time of the assignment is a critical factor, selecting the assignment with the shortest response time is desired. An improved method for improving response time of an assignment with the shortest response time incorporates assignment location, a road condition associated with each assignment, and the traffic conditions associated with each assignment. Event information is also considered in determining the best route and travel time from the mobile entity to the destination.

Abstract: A receiver automatic gain control includes a variable gain receiver having a control input and responsive to a gain control signal for adjusting the output level of the receiver. A controller is coupled to the variable gain receiver. The controller monitors a received signal quality and a received signal power level. The controller generates a control signal for controlling the gain of the variable gain receiver as a function of the signal quality and the power level. The controller controls the gain as function of the received signal power level and selectively controls the gain as a function of the signal quality.

Abstract: A controller (112) queues (602) store-and-forward transmissions in corresponding blocks (506) of data having a predetermined length, and sends (604) the blocks of data to a transmitter (116). The transmitter stores (606) the blocks of data in preparation for transmission. The controller then determines (608) a need to transmit the data for a near-real-time transmission. In response, the controller and the transmitter cooperate (610) to replace, at the transmitter, a block of the blocks of data that has been received but has not yet been transmitted, with the data for the near-real-time transmission.

Abstract: A method and corresponding apparatus for a first controller (106) and implemented in a second controller (110), arranged for providing messaging service to, respectively, a first load (203) and a second load (205), to cooperatively and dynamically allocate a resource (207) between these loads. The method allocates a first and second default portions (221, 231) of the resource (207), and schedules messages from the first and the second load (203, 205) within these default portions (221, 231). Any unused part (243) of the default portions is reported to the other controller and it schedules messages from its load within the unused part (241), thereby dynamically allocating the resource (207) between the first and second load (203, 205).

Abstract: A portable radio communication device (303) includes power control circuitry (315) for monitoring the voltage level incoming from a battery (317), and provides power to the rest of the radio communication device (303). The power control circuitry (315) includes a boost regulator (407) that is used to generate an internal reference signal for use throughout the radio communication device including an analog to digital converter (ADC) for digitizing the battery voltage for use by the power control circuitry (315). The power control circuitry (315) compares the digitized battery voltage to thresholds to control power to the remainder of the radio communication device (303). Additionally, a secondary comparator (413) is provided to prevent damage to the battery and radio communication device circuitry. The secondary comparator uses multiple undervoltage thresholds depending upon the power state of the radio communication device (303).

Abstract: Battery life and cooling are improved in an electronic device. A thermoelectric module and phase change material module are placed near a heat source in an electronic device. The thermoelectric module and phase change material module insulate a surface to be cooled on the electronic device. The thermoelectric module generates an electrical current in response to a temperature differential at opposite surfaces on the thermoelectric module. The phase change material module enhances or limits the temperature differential seen at the thermoelectric module. The electrical current generated by the thermoelectric module is used to charge a battery of the electronic device.

Abstract: A method and apparatus for processing embedded messages at a mobile station including a subscriber identity module (SIM) identifying the subscriber, for example, a GSM or a non-GSM wireless telephone. The process includes receiving a message having a protocol identifier, transferring at least a portion of the message to the subscriber identity module if the protocol identifier satisfied a condition, extracting information from the at least portion to of the message at the subscriber identity module if a protocol identified by the protocol identifier is supported by the subscriber identity module.

Abstract: An off-channel leakage power monitor implemented in a transceiver (100) dynamically measures adjacent and alternate channel leakage power produced by nonlinearities in a transmitter (110) power amplifier (116). A main local oscillator (124), offset voltage-controlled oscillator (122), and second local oscillator (170) are adjusted to obtain on-channel power, adjacent channel power, and alternate channel power measurements using a measurement calculator (185) implemented in a digital signal processor (180) or as a gate array in a receiver (140). Once the off-channel leakage power measurements have been obtained, any number of techniques can be used to extract increased efficiency from the power amplifier (116) while maintaining acceptable linearity under changing operating conditions.

Abstract: A mobile wireless communication device for extracting time from a spread spectrum signal including a repeating short chip code and a repeating long chip code, a ratio of the long and short chip is a non-integer having a remainder bit that accumulates over successive intervals of the chip codes. The device includes a receiver for receiving (710) the spread spectrum signal, means for determining corresponding bit numbers (720) of the long and short chip codes at a particular time, means for determining a number of accumulated remainder bits (730) as a function of the bit numbers of the long and short chip codes, and means for determining time (740) as a function of the number of accumulated remainder bits.