Abstract: A transceiver device (52 or 10) operates as a source of a data transmission in a communication system (50) capable of dynamically allocating spectrum for transmission of the data transmission between the transceiver device (52) and a second transceiver device (51). The transceiver device (10) includes a transmitter, a receiver coupled to the transmitter and a processor or controller (12) coupled to the transmitter and receiver. The transceiver device is programmed to monitor the spectrum (channels 1-13 of FIG. 3) to determine if a portion (channels 4-8 for example in time slot 8) of the spectrum is available. The transceiver determines what portion of the spectrum is desired for data transmission and then transmits (see time slots 11 and 13) the data transmission within a dynamically selected portion of the available spectrum.

Abstract: Methods and apparatus for forming a metal shield on a printed circuit board (10) include a layer of dielectric material (23) one or more printed circuits (21) on the layer of dielectric material (23), a layer of metal (27) on the layer of dielectric material (23), a metal-clad trench or opening surrounding the printed circuit (44) and electrically connected to the layer of metal(27), a solder pad (24) on the layer of dielectric material (23), a microvia (25) through the solder pad (24) and the layer of dielectric material (23), and electrical components (11) soldered to the solder pads (24) and to the printed circuit (21).

Abstract: A wireless communication device (30) within a wireless communication system (10) includes a receiver (68) for receiving a message, a processor (78) coupled to the receiver (68) for processing the message, and a memory (80) coupled to the processor (78). The memory (80) includes a message memory (94) for storing the message and a location memory (96) for storing location information (100). The wireless communication device (30) further includes an operation mode management application (90) coupled to the processor (78). The operation mode management application (90) identifies at least one operation mode (112), and enables the operation mode (112) in response to a processor command (104) received from the processor (78).

Abstract: A system controller (106) includes a speech encoder (107) that encodes a low bit rate digital voice message. The speech encoder sets values of words of a header of the encoded message. The values of the words define a quantity of frames in the voice message, N, and define a vocoder rate used for the encoded message. The speech encoder sets a state of each indicator in each frame status field of N frame status fields that are transmitted after the header of the encoded message. The speech encoder assembles N frame data fields, wherein each of the frame data fields comprises a set of data words. The N frame data fields follow the N frame status fields. Each set of data words conforms to at least one of the vocoder rate and the states of the indicators. A decoder (3310) decodes the encoded low bit rate digital message.

Abstract: A symbol independent automatic frequency controller (100) includes a symbol correlator (110) for receiving a complex digital signal generated within a selective call receiver wherein the symbol correlator provides a real signal (114), an imaginary signal (116), and a magnitude signal (112), a discriminator (140) coupled to the symbol correlator for receiving and processing the real signal and the imaginary signal to provide a frequency error signal, a low pass filter (120) and comparison element (130) for filtering the magnitude signal and comparing the magnitude signal to a predetermined lock threshold signal that controls the bandwidth of the symbol correlator in the event the magnitude signal exceeds the lock threshold signal, and a feedback loop providing the imaginary signal (116) to an accumulator (170) and back to the symbol correlator wherein the accumulator provides the symbol correlator with an apriori-symbol phase feedback (172).

Abstract: In a communication system (800) having transmitters (108) for transmitting location information to subscriber units (102) located with the transmitters' coverage areas, a method of determining the location of a subscriber unit. At least some of the transmitters use different assigned time intervals to transmit their information, and a subscriber unit receiving such information can determine its location based, at least in part, on the time interval during which it received information. Received location information is stored in a dedicated portion (808) of a subscriber unit's memory for later retrieval by the user. In a two-way system, a subscriber unit can transmit its stored location information to a system receiver (802) for storage in a system memory (804). The system memory (804) is accessed by a system operator or other authorized person to determine the location of a subscriber unit and/or its pattern of movement throughout the coverage areas.

Abstract: A method (60) of pre-caching user interaction elements, includes monitoring motion patterns (40) with an electronic input device having a gesture recorder and a writing surface using a three-dimensional position of the recorder with respect to the writing surface, analyzing the monitored motion patterns (42) made while the recorder is off the writing surface to determine if the recorder is approaching a target area at the writing surface (44), the target area having an associated functionality, and triggering the functionality (50)before contact between the recorder and the target area. The steps are repeated continuously. The analyzing step (42) determines if the recorder is moving towards the writing surface, and, if so, a two-dimensional location of the recorder with respect to the plane of the writing surface is determined (46) and a trajectory is defined based upon the location and movement of the recorder off the writing surface.

Abstract: A full serial implementation of a M-level correlation based demodulator (100) includes a two's complement, pass-through, zero-out complex conjugate multiplier element (102), a boxcar filter (104) coupled to the multiplier element, a complex magnitude approximater element (106) coupled to the boxcar filter and a maximum value and index holding element (108). The multiplier element reuses common products along an M-level of cross-correlation to reduce multiplication functions at a rate 2 times M faster than a sampling rate at an input of the demodulator.

Abstract: A wireless communication system for location based schedule management (10) includes a plurality of wireless communication devices (40), including a wireless communication device (32) and a backup wireless communication device (47); a system controller (24) for generating a message; a RF transmitter (26) for transmitting the message (34) to the plurality of wireless communication devices (40); and an application server (76). The application server (76) includes a server memory (152) for storing an event location (134) and one or more event criteria parameters (129), a server processor (150) for processing a current location (122) of the wireless communication device (32); and a server event management application (82) for comparing the current location (122) with the event location (134). The server processor (150) sends a server command (84) to the system controller (24) in response to the comparison of the current location (122) and the event location (134) exceeding the event criteria parameters (129).

Abstract: A method for a human user to interactively enter an alphanumeric text message into a multiline display device (12) using a keypad (14) containing a number of keys. On one portion (22) of the display, the alphanumeric text message that the user is entering is displayed. On a second portion (23) of the display, a listing of subsets (24, 25) of alphanumeric symbols is shown, with each subset being mapped to a corresponding key on the keypad. The user selects the subset of alphanumeric symbols containing the one alphanumeric symbol to be entered into the alphanumeric text message and depresses the key that is mapped to the selected subset. In response to this action, the second portion of the display then changes to show the alphanumeric symbols contained in the selected subset, with each alphanumeric symbol mapped to a specific key on the keypad. The user then selects the desired alphanumeric symbol and depresses the proper key.

Abstract: A communication device having a theft deterrence feature includes a selective call receiver (16), a transmitter (16), a memory (18) coupled to the selective call receiver and containing an encryption key (40) and an address (41), a secure memory (26) coupled to the selective call receiver containing secure data that is accessible with the encryption key and further containing a stealth code, a tampering detection circuit (21) for detection of unauthorized use by an unauthorized user of the communication device or another electronic device coupled to the selective call device, and a processor (22). When the processor detects unauthorized use, it is to delete the encryption key, transmit a stealth code to a base station transparent to the unauthorized user when unauthorized use is detected, and receive data into the secure memory location transparent to an unauthorized user of the communication device.

Abstract: A receiver (600) uses a scanning technique (100) to minimize scan time. An initial bandwidth setting is selected that covers multiple channel frequencies (106). A signal detection step (108) is performed looking for channel activity. As channel activity is detected, the bandwidth of a baseband filter (628) is narrowed (140, 146). The radio remains programmed to the same channel while the bandwidth is varied. Once the last signal detection with the narrowest possible bandwidth setting has been determined (144, 150, 152) the radio is programmed to that channel. Thus, more than one channel frequency is capable of being scanned without reprogramming the radio to a new channel for each scan.

Abstract: A decimation and channel filter (100 or 23) in an oversampled system includes a combined decimation and channel filtering architecture for simultaneously processing in-phase and quadrature phase complex input signals. A decimation filter (24) of the combined decimation and channel filter provides sampled outputs to a memory (108) to provide an intermediate result (604), which is stored in the memory (108) in a first format (608). A channel filter (26) of the combined decimation and channel filter processes (610) a decimation final result of the decimation filter in a second format in the memory to provide a final result. This architecture minimizes cost and current drain in a complex signal path decimation and channel filtering process. In addition, a channel filtering algorithm is used to ideally minimize current drain by a factor of 2.

Abstract: A wireless communication system (10) includes a system controller (22), at least one radio frequency transmitter (26), at least one radio frequency receiver (28), at least one transmit antenna (30), at least one receive antenna (40), a chat server (48) and a plurality of wireless communication devices (36). The chat server (48) manages the communication of a plurality of chat discussions, facilitating substantially real time communication among the plurality of wireless communication devices (36) within the wireless communication system (10).

Abstract: An electronic device (12) includes in one embodiment a display (14), at least one application (20) that generates a pop-up window (10) which is displayed on the display (14); and an application manager (16). The application manager (16) deletes the pop-up window (10) in response to an input (26) from the application (20). The electronic device (12) includes in a second embodiment a display (14) that displays a pop-up window (10), a plurality of applications (18) having corresponding application messages (42), a buffer (38) for storage of application messages (42), a display controller (40), and an application manager (16). The application manager (16) deletes an application message (33) stored in the buffer (38) in response to an input (26) from an application (20).

Abstract: An orthogonal latch assembly includes a latching member 300 and a catch 400 having a first wedge shaped section 202 and a second wedge shaped section 204. The first wedge shaped section 202 enables engagement of the catch 400 with latching member 300. The second wedge shaped section 204 enables disengagement of the latching member 300 from the catch 400.

Abstract: A digital demodulator (100) includes a differentiate and cross multiply stage (102) and a plurality of filter/decimator stages (106, 112, 118 and 108, 114, 120 and 110, 116, 122) that accept both multiple baud rates and multiple modulation deviation frequencies, and that provide a common frequency data stream at their respective outputs. One of said filter/decimator stages is coupled to a primary filter (124) which is followed by a box filter (134). The box filter (134) improves the overall filter response and provides notches at a specified frequency (e.g., 4800 Hz) and its harmonics. Demodulator (100) provides improved sensitivity without the need for any circuit trimming. The filter stages (e.g., 106, 112, 118; 108, 114, 120; and 110, 116, 122) used in demodulator (100) have been optimized to eliminate the need for costly multipliers.