Abstract: An assembly (24) includes a front housing (26), a back housing (28), an electrical component (30) having a plurality of component conductive pads (60), a substrate (32) having a plurality of substrate conductive pads (54), a flex circuit (34) having a first plurality of flex conductive pads (42) and a second plurality of flex conductive pads (44), and a connector (36). The connector (36) is situated between the flex circuit (34) and the electrical component (30) for connecting the second plurality of flex conductive pads (44) to the plurality of component conductive pads (60). The first plurality of flex conductive pads (42) and the plurality of substrate conductive pads (54) are in alignment, and the connector (36) also compresses the assembly (24) to create an electrical connection between the first plurality of flex conductive pads (42) and the plurality of substrate conductive pads (54).

Abstract: A wireless subscriber unit (30) includes a memory manager (46) capable of communicating with a plurality of smart cards (44). The memory manager (46) is programmed to allocate a memory segment (48) to each smart card (44) when it is operatively connected to an interface (42) of the wireless subscriber unit (30). The memory manager (46) communicates with the smart card (44) to update data (50) stored in the memory segment (48).

Abstract: In a wireless communication system (10), a wireless subscriber unit (26) contains a function key (52) for performing an operation on a function value (50). The function value (50) is changed based on receipt of a message (38) sent from a transmission source (21).

Abstract: A method for communication between a dispatch center (16) and a plurality of wireless communication devices (36) within a vehicle dispatch system (10). The method includes receiving a request for dispatch (28) including an assignment location (66). An assignment message (32) including a first criteria paremeter (62) and a location parameter (50) is sent to the plurality of wireless communication devices (36). Each wireless communication device (36) receives the assignment message (32) including the first criteria parameter (62) and the location parameter (50), compares the location parameter (50) with a current location (56) using the first criteria parameter (62), transmit a reply (38) to the dispatch center (16) in response to the detection of an affirmative match.

Abstract: A high-speed current switch (36) comprises a differential switch (14), a current source (12), an op-amp (32), a feedback switch (38), a hold capacitor (40), a biasing transistor (42), and a second current switch (44). The high-speed current switch (36) receives a complementary control signal (46) and a control signal (48), and generates an output current (26).

Abstract: An elliptic curve (EC) processor circuit (120) comprising a finite field arithmetic logic unit (122), operation registers (124) an EC control unit (123) and a register file (127). A storage element (250) is coupled to the finite field arithmetic logic unit (122). The EC control unit (123) controls the various components of the EC processor circuit (120) to decompress a compressed one-bit representation of a Y coordinate of an elliptic curve point (X, Y). The EC control unit (123) controls the use of the operation register (124), the storage element (250) and the finite field arithmetic logic unit (122) to recursively compute the decompressed version of the compressed Y coordinate based upon the X coordinate and the compressed one-bit representation of the Y coordinate. The circuit and method employ minimal additional hardware and processing in an EC processor circuit (120).

Abstract: An automatic frequency control circuit (84) and a method for automatic frequency control in a digital receiver includes a CORDIC vector rotation processor (88), an FM demodulator (100) and an integrator (72). The circuit and method utilize the CORDIC computing technique to simplify required circuitry and to reduce required software processing power over conventional automatic frequency control techniques.

Abstract: A method and apparatus for improved pitch period (&tgr;) estimation in a compression system is disclosed. The system uses original estimates of integer lag (&tgr;0) and open-loop prediction gain (&bgr;ol) as input to an adaptive filter parameter initialization block (304) which supplies inputs to a plurality of adaptive filter elements (306-308). Adaptive filter elements (306-308) provide information regarding the harmonics of the residual signal (&egr;(n)) to an adaptive filter parameter analysis block (310). Adaptive filter parameter analysis block (310) estimates the fundamental frequency of the residual signal based on the analysis of the harmonics and outputs a pitch period (&tgr;) for eventual use in a delay contour computation.

Abstract: An amplifier circuit (20) uses a series transistor (38) to couple the output of an amplifier (26) to a tuned circuit load (40) and to act as a variable resistance. In one embodiment for a multi-band receiver, multiple series transistors (38, 42) are switched for connecting different tuned circuits (40, 44) to the amplifier's output, and an activated one of the series transistors receives a gate voltage that varies its resistance so as to achieve gain control. An activated series transistors can also provide a resistance that stabilizes the amplifier (26).

Abstract: A communication device such as pager (100) includes a controller (110) which helps decode an incoming message having important information and stores it in memory (112). A user control (116) such as a "Read" control switch is then used to display the message on the display (106). In accordance with one aspect of the present invention, controller (110) locates the important information found in the stored message and causes it to be displayed on one or more stationary display lines (416) which do not change even when the user scrolls through different display screens (408-412) to read the entire message. In an alternate embodiment of the invention, the pager controller (110) will have stored a set of rules which will help it locate the important information (e.g., telephone number, etc.) found in a stored message. Once the important information is found, the controller (110) will cause this information to be displayed as a stationary display line when displaying the message in one or more display screens.

Abstract: A radio communication system includes a voice recognition system (221) for converting (400) a caller's voice message to a textual speech message. The textual speech message is then transmitted to an intended selective call radio (122). To perform these functions, the radio communication system includes a caller interface circuit (218), a transmitter (116), and a processor (222). To perform voice-to-text conversion, the processor is adapted to cause the caller interface circuit to sample a voice signal generated by the caller during a plurality of frame intervals, and to apply a Fourier transform thereto, thereby generating spectral data. The spectral data is subdivided into a plurality of bands. The spectral envelope of the spectral data is then filtered out to generate filtered spectral data. A Fourier transform is applied thereto to generate an autocorrelation function for each band.

Abstract: A SCR (Selective Call Radio) (400) includes a circuit. The circuit in turn includes a component (102) having one or more bondable elements (104-108), and a substrate (110) coupled to the component (102). To substantially improve interconnect reliability, the substrate (110) includes a corresponding one or more bondable pads (108) for interconnecting with the one or more bondable elements (104-108) of the component (102), and one or more slotted openings (202) in the substrate (110) for relieving mechanical stress near one or more interconnects of the substrate (110) and the component (102).

Abstract: A wireless subscriber unit (30) contains an advertisement manager (56). The advertisement manager (56) is programmed to assign an advertisement icon (54) to a message indicator (46) on the display (42) of the wireless subscriber unit (30). Assignment of the advertisement icon (54) to the message indicator (46) associated with a message (26) may be based on a predetermined algorithm in the advertisement manager (56), or based on a notification received from the wireless communication system (10).

Abstract: A radio communication system includes a voice recognition system (218), a transmitter (202) and a processing system (210). The voice recognition system is utilized for receiving caller initiated messages, and the transmitter is used for transmitting messages to a plurality of SCRs (selective call radios) (122) of the radio communication system. The processing system, which is coupled to the voice recognition system, and the transmitter, is adapted to cause the voice recognition system to convert a voice signal representative of a voice message originated by a caller of the radio communication system to a text message (401, 417), wherein the text message is intended for a SCR, to then generate a likelihood of success that the voice signal has been flawlessly converted to a text message, to have a human listen to an audible representation of the voice signal, and to cause the transmitter to transmit the text message to the SCR (432).

Abstract: A special function application (32) within a wireless subscriber unit (10) operates using information contained in segments of a received message (14). The information included in the received message (14) can be used in more than one special function application (32) to meet multiple end-user needs.

Abstract: A speech coder (400) for coding an information signal varies the codebook configuration based on parameters inherent in the information signal. The speech coder (400) requires no additional overhead for sending of mode parameters while allowing subframe resolution. The configurations vary not only for voicing level, but also for pitch period since different physiological traits yield different codebook configurations. A dispersion matrix (406) within the speech coder (400) facilitates a codebook search which is performed on vectors whose length can be less than a subframe length. Additionally, use of the dispersion matrix (406) allows the addition of random events for very slightly voiced speech which incurs little computational overhead but produces a rich excitation.

Abstract: An antenna (28) for use in a wireless communication module (10) includes a shield plate (40), an antenna loop element (42), and a transmission line element (44). The wireless communication module (10) also includes a receiver (37) having a circuit board (30). The shield plate (40) is located on a first side (32) of the circuit board (30); and the antenna loop element (42) and the transmission line element (44) are located on an opposite side (34) of the circuit board (30). The shield plate (40) is electrically connected to a first loop end (50) of the antenna loop element (42). A capacitor (64) interconnects a second loop end (52) of the antenna loop element (42) to a first transmission line end (58) of the transmission line element (44). A second transmission line end (60) is electrically open.

Abstract: A selective call receiver (102) for use in a communication system (100) includes a receiver (404), a memory (412), and a processor (408). The receiver (404) is capable of receiving a message code (314) during a first frame from a first transmitter and the same message code (314) during a second frame from a second transmitter. The memory (412) stores a first and a second canned message, wherein the first canned message corresponds to the message code (314) being received in the first frame and the second canned message corresponds to the same message code (314) being received in the second frame. The processor (408) is responsive to the message code (314) for identifying the first canned message in the memory (412) corresponding to the message code (314) and the first frame, and identifying the second canned message in memory (412) corresponding to the same message code (314) and the second frame.

Abstract: In a wireless communication system (10) including a transmission source (21), a wireless subscriber unit (26) contains a function key (52) for performing an operation on a function value (50). In response to receiving a change notification message (28), the transmission source (21) sends a message (38) to the wireless subscriber unit (26). The function value (50) is changed based on receipt of the message (38) sent from the transmission source (21).

Abstract: An electrical connection is formed between a plurality of substrate conductive runners (52) and a plurality of substrate conductive pads (54) arranged in an alternating pattern on a substrate (32) and a plurality of component conductive runners (48) and a plurality of component conductive pads (50) arranged in an alternating pattern on an electrical component (40) through a plurality of conductive pads (60) and conductive runners (58) arranged in an alternating pattern on a connector (34). A display assembly (26) advantageously employs the electrical connection.