Abstract: A radio (100) provides multiple audio modes of operation, such as a cellular and dispatch modes. Illumination devices (108, 110) are located near the radio's audio sources (104, 106) and become activated to indicate to the user which mode of operation is present.

Abstract: A telecommunication system and method having a transmitter and receiver for voice encoded signals. The receiver has a speech post-processor connected as an element before conversion of the speech from digital form and delivery of the speech to a listener. The speech post-processor processes select sequences of speech signals of a predetermined duration, and obtains the most likely estimation of a speech sequence that contains unrecognized phonemes. The speech post-processor has a recognizer and parser that receives speech signals, parses them into corresponding phonemes or unrecognized phonemes. Speech sequences of preselected duration are selected, and processed through an execution trellis implemented by a Viterbi algorithm to obtain a most likely sequence estimation for sequences which contain unrecognized phonemes, and determined phonemes replace the unrecognized phonemes. Only speech sequences with unrecognized phonemes are directed to the execution trellis.

Abstract: A method utilizes a training monitoring algorithm to control when full training of a transmitter of a shared communication system that utilizes dynamic channel allocation occurs. Full training of the transmitter occurs during an initial transmission slot of a training interval that is used to request allocation of fixed communication resources of the communication system or when operating conditions of the transmitter, such as power and frequency, change. The duration of the training interval is dynamically controlled by manipulation of full-power and cut-back power training interval counters.

Abstract: A wireless video swivel phone device includes a pivoting module. The pivoting module includes at least one video camera lens for capturing video images from at least one direction. The pivoting module rotates to allow the at least one video camera lens to capture video images from different directions. The pivoting module includes an ear cup portion that provides audio output to a user's ear for using the wireless video swivel phone as an ear-to-mouth audio phone communication device.

Abstract: Methods and apparatus for adding additional circuitry (19) to a circuit board (11) having a radiation shield (14) associated therewith include the additional circuitry (19) mounted onto a flex circuit (21) which in turn is mounted on the radiation shield (14). A conductor (32) containing portion (24) of the flex circuit (21) extends therefrom and is routed around and through a cutout (18) in the bottom surface of the radiation shield (14). The conductor (32) is connected to the printed circuit board (11) at the location of the cutout (18) in the radiation shield (14).

Abstract: A tunable filter (300) includes first (302) and second (304) “bridged-T” resonators. The first (302) and second (304) resonators are capacitively coupled together via bandwidth control/coupling section (306). A biasing section (314) provides the proper biasing and decoupling for the filter (300). Filter (300) provides for low-side injection mode operation, and provides for a very deep zero on the lower side of the passband resulting in excellent selectivity. Filter (300) provides for excellent selectivity while reducing the number of inductors and varactors needed in the filter circuit. A high side injection mode filter (500) similar to filter (300) is also described in the disclosure.

Abstract: An architecture for simplified automatic gain control circuit (100, 200, 300) that is useable with M-ary QAM systems to improve overall link performance. The implementations particularly relating to modulating an M-ary QAM constellation according to a set of estimates derived from the pilot channel(s) and/or the traffic channels, modulating the M-ary QAM constellation according to the values of the pilot and traffic channel gains that are being sent to a mobile wireless device on a control channel, and using a power control bit at the mobile wireless device to modulate the M-ary QAM constellation, all resulting in improved receiver performance.

Abstract: A percussive sound contains both harmonic and non-harmonic frequency spectral content. To reproduce a particular percussive sound, such as the sound of a drum or cymbal or hand clap, for example, the harmonic and non-harmonic content are determined empirically. Also, and tendency of the harmonic content to change over time, and the temporal aspects of attack, sustain, and decay are likewise determined empirically. These attributes are represented in the invention in a percussive sound file which includes a harmonic content profile (502), noise shape filter (504), Doppler shift profile (506), and a time wave shaping profile (508). The harmonic content profile is used by an FM generator (114) to generate a frequency modulated signal (116). The noise shape profile is used by a noise generator (134) to generate and shape the non-harmonic spectral content. While the sound is being generated, the Doppler shift profile is used to adjust the base frequency of the FM signal.

Abstract: A portable communication device assembly comprises a first communication device housing (12), a second communication device housing (14), and a snap retainer (40) for interconnecting the housings (12 and 14).

Abstract: A high density multi-layer printed circuit board (100) is formed by building additional dielectric and metallization layers over a central core (110) of conventional PCB laminate construction. The central core has a metallization pattern (113, 114) on at least one surface. A photoimaged dielectric layer (130) is deposited on one side of the central core and overlies the metallization pattern. Vias (136) are formed in this dielectric layer by a photoimaging process, and an additional metallization pattern (133) on this layer is electrically connected to the underlying metallization pattern through these vias. A non-photoimageable dielectric layer (120) is deposited on the other side of the central core. Vias (126) are formed in this dielectric layer by a laser drilling process, and an additional metallization pattern (123) on this layer is electrically connected to an underlying metallization pattern through these laser drilled vias.

Abstract: The minimum transmit battery voltage (Vtx min) of a radio operating in a TDMA mode of operation or the stand-by battery voltage (Vstd-by) of the radio operating in a GSM mode of operation can be determined as a function of the combination of an in-slot transmit battery voltage (Vin-slot), an out-of-slot transmit battery voltage (Vout-slot), a stand-by compensation factor (&Dgr;sb), and a compensation factor (K). The stand-by compensation factor (&Dgr;sb) is related to a difference between the out-of-slot transmit battery voltage (Vout-slot) and a stand-by battery voltage (Vstd-by). The compensation factor (K) has a first value for the TDMA mode of operation and a second value for the GSM mode of operation. Each value of compensation factor (K) is related to the manner in which the radio utilizes battery power during transmission in the TDMA or GSM modes of operation.

Abstract: A controller in a communication device receives a request, from a process operating in the communication device, to subscribe to a data routing service that is managed by the controller. In response to the request, the controller assigns a destination identifier to the process and adds the process and the assigned destination identifier to a routing table that is stored in a memory associated with the controller. Data subsequently received from a data source is routed to the process or to one of multiple communication ports by the controller by reference to the destination identifier, or the absence of a destination identifier, stored in the routing table.

Abstract: A mobile station (102) contains a local personality database (110) in a memory (306) of the mobile station. The local personality database contains information records (400), at least one of which has a variable personality parameter, such as a directory number (404). The directory number may change with either the time of day, geographic location, or both. At the appropriate time, the mobile station transmits a request to a central office (106) to receive an update of the directory number. The central office searches a parameter database (112) to find the most recent directory number, and returns it to the mobile station, which stores it for use at a later time. The system can also update scan and channel lists in the same manner.

Abstract: An amplifier apparatus for a multimode mobile communication device includes a carrier amplifier (114) and a peaking amplifier (116). The peaking amplifier has an adjustable bias level and is adjusted by a regulator to a predetermined level, depending on which mode of communication is selected. The bias level on the peaking amplifier is held constant so long as the mode of communication is the same. By adjusting the bias point of the peaking amplifier in conjunction with the selection of the mode of communication, the efficiency and the linearity of modulation can be optimized for the particular mode of communication.

Abstract: A communication device (100) operates in first and second modes of operation including a dispatch mode of operation and a telephone mode of operation. The device (100) includes a main body (124) having a top surface (126) and a cover (102). The cover 102 selectively moves between at least a first position wherein at least a portion of the top surface (126) is covered to provide for selective operation in the dispatch mode and at least a second position wherein the top surface (126) is exposed to provide for selective operation is the telephone mode of operation. The cover (102) includes a see through section (108) covering at least a portion of the display section (114) when the cover (102) is in the first position in order to protect the display section (114) and simultaneously provide access thereto. The cover (102) also include through access keys (106) which provide access to the keypad (116) even when the cover (102) is closed.

Abstract: A wireless message communication system (11) delivers dynamically configurable datagram messages between a server (15) and subscriber units (17, 18, 19, 20, 21, 22). The server (15) queries a subscriber unit (17) for its data capability profile, such as supported data types, number of data fields, size of each data field, and data type for each data field. The server (15) and the subscriber unit (17) dynamically configure a message datagram (200) to conform message information in transmitted data to the data capability profile of the subscriber unit (17). The server (15) and the subscriber unit (17) then wirelessly communicate a message containing message data packets arranged and formatted according to the message datagram (200).

Abstract: A system and method for employing a training scheme to a linear amplifier system having a modulator component for modulation of a supply power of an RF power amplifier. A supply modulator is set at a maximum or peak supply voltage of the RF power amplifier that corresponds to a maximum saturation point of the RF power amplifier. A training mode is entered wherein an input signal is provided and a phase adjustment and an attenuation level for the input signal to the RF power amplifier is determined. The phase adjustment and attenuation level is employed in normal operation. A relationship between the maximum clip level and maximum supply voltage and the instantaneous voltage level of the supply that will be utilized to modulate the reference signal is employed to determine the attenuation level.