Abstract: A communication management system (48) for personalized mobility management of wireless services includes at least one wireless communication device (36), a mobility aware content server (50), and a wireless communication system (10). The mobility aware content server (50) sends a location specific content (60) to the wireless communication system (10) in response to a current location (62), a movement speed (64), and a movement direction (66) of the wireless communication device (36). The wireless communication system (10) is coupled to the mobility aware content server (50), and, upon receipt of the location specific content (60) from the mobility aware content server (50), transmits the location specific content (60) to the wireless communication device (36).

Abstract: A technique is used in a data terminal (110, 160) that encodes and decodes a data packet that is transmitted in a link of a frequency hopping system. During encoding, an information portion of the data packet is determined for transmission, a transmit redundancy check code is generated over the information portion and an identifier using a predetermined redundancy check code generator, and the data packet is generated to include the transmit redundancy check code and the information portion, but exclude the identifier. During decoding, the information portion and a received redundancy check code of the received data packet are determined, a calculated redundancy check code is generated over the information portion and the identifier, using the predetermined redundancy check code generator, and the information portion is rejected when the received redundancy check code does not match the calculated redundancy check code.

Abstract: A digital DC offset correction circuit (68) provides DC offset correction within a receiver (50) using an area-optimum, rapid acquisition cellular multi-protocol digital dc offset correction scheme. The digital DC offset correction circuit (68) includes an integrator (90), a low pass filter (92), a decimator (94), a digital to analog converter codeword clamp (96), and a digital to analog converter (98).

Abstract: A two-way selective call device (106) for determining if a response was received to a message transmitted to a designation device including at least one switch (216) to construct the message having at least an identifiable character. An address book designates at least one destination device (106, 112, 116, 118) and a selector (216) selects a destination device (106) of the at least one destination device (106, 112, 116, 118) to receive the message. A transmitter (222) transmits the message to the destination device (106) and a timer (302) measures a first predetermined time. A processor (206) coupled to the receiver (204) monitors received messages during the first predetermined time period to determine when a response to the message was received and an output device (208, 212, 214) indicates when the response from the at least one identified destination device was not received within the first predetermined time period.

Abstract: A technique is used in a selective call communication system (100) and in a broadcast communication system (106) to provide additional information about a broadcast to a selective call device (111). A broadcast receiver (109) receives a broadcast that includes a prompt (220), such as a FLEX™ logo, and an information address signal (305), such as an inaudible portion of the sound portion of the broadcast. The prompt indicates that additional information is available in a message to be transmitted by the selective call communication system. The selective call device receives the information address signal when activated to do so in response to the prompt. The selective call device receives and decodes an information address from the information address signal and uses it to recover the message at a protocol position indicated by the information address. The additional information is then recovered from the message.

Abstract: A communication device such as pager (100) includes a real-time clock circuit (118). The real-time clock circuit keeps track of both the pager's home time zone information (402) and the pager's current time zone information (404). While the pager user is operating within his home area, the pager's home time zone information (402) and the current or local time zone information (404) will be the same. If the user however travels away from his home system's time zone, the real-time clock circuit adjusts the current time zone information (404) to reflect the time zone the user is currently operating in. The user can set alarms which reference either the home time zone information (402) or the current time zone information (404). This allows for more user flexibility on how the alarm conditions are to operate.

Abstract: An apparatus and method for temperature regulation of a fuel cell using differential heat capacity of the fuel storage media is disclosed. The method of regulating the temperature involves measuring the temperature of one or more fuel cells, comparing the temperature against target values, selecting a control method from a set of available control methods based on the result of comparison and using that control method to initiate and control a regulation cycle, and actuating a flow control means using the selected control method to alter the flow of fuel between one or more fuel storage containers, each containing fuel storage media which exhibit different enthalpies of formation and dissociation. The regulation process starts with measuring temperature (110) of a fuel cell system (100). The measured temperature is then compared (120) to a predetermined set of ideal target values designed to provide peak fuel cell performance.

Abstract: A technique is used for providing additional information about a broadcast presentation that allows a user interested in the additional information to acquire it easily, using a selective call device or a television remote control device to easily acquire an information address during the broadcast when a prompt is presented during the broadcast. An advertiser can send the additional information over a wide area radio selective call communication system or can post it at a universal resource locator of a computer network. The information address is used to acquire the additional information. The information address can be stored, selected and deleted in the selective call device or remote control device. The prompt can be disabled or enabled manually or based on location.

Abstract: A circuit (100) for generating a ratio signal indicating a ratio of frequency error to signal magnitude of an input signal includes an FM ratio detector (110) and a sigma-delta analog-to-digital converter (130). The FM ratio detector (110) is responsive to the input signal and generates a magnitude signal and an error signal. The magnitude signal is representative of a magnitude of the input signal and the error signal is representative of a frequency error of the input signal relative to a preselected frequency. The sigma-delta analog-to-digital converter (130), which is responsive to the filtered magnitude signal and the filtered error signal, generates a stream of logic “1's” and logic “0's” that are indicative of a ratio of the filtered error signal to the filtered magnitude signal. Thus, the sigma-delta analog-to-digital converter generates the ratio signal (132).

Abstract: An automatic simulcast correction method (300) for a selective call receiver (100) includes the steps of measuring a received signal (304) for a received signal strength indication measurement and then determining if a protocol indicates a simulcast signal (310). If the received signal strength indication measurement is above a predefined threshold and the protocol indicates the simulcast signal, then the selective call receiver is optimized for simulcast delay spread distortion (312). If the received signal strength indication measurement is below a predefined threshold or the protocol does not indicate the simulcast signal, then the selective call receiver is optimized for static sensitivity (314).

Abstract: A signal processor (125) for recovering data symbols from a received signal includes matched filters (210, 215) for receiving and filtering a quadrature (Q) signal component of the received signal. A detector (225) is coupled to the matched filters (210, 215) for selecting a filtered signal provided by one of the matched filters (210, 215) and for labeling the filtered signal according to a magnitude and phase of the filtered signal to provide a Q channel output flag. A Q channel symbol/sign decoder (235) then processes the Q channel output flag to generate a Q channel magnitude variable and a polarity variable, and a symbol decoder (240) coupled to the Q channel symbol/sign decoder (235) generates a data symbol in accordance with the Q channel magnitude variable and the polarity variable.

Abstract: A DC offset correction circuit (68) provides DC offset correction within a receiver (50) for receiving and processing a radio frequency signal (28) within a radio communication system (30). The DC offset correction circuit (68) includes a feedback loop (88) for shifting a digital signal (80) by a programmable amount; and a coarse DC offset correction path (104) coupled to the feedback loop (88) for performing coarse DC offset correction.

Abstract: A communication device (100) employs a method and apparatus for indicating to a user of the communication device that only a portion of a received message (120) can be displayed to the user. Some time after receipt of a message, the communication device displays a portion of the received message and one of at least two different truncation symbols in the event that the entire message cannot be displayed. Each truncation symbol indicates to the user a particular reason why the entire received message could not be displayed. For example, if the entire message could not be decoded reliably, the communication device displays a portion of the message and a message error truncation symbol. Alternatively, if a length of the received message exceeds an amount of memory allocated for the message, the communication device displays a portion of the message and a message length truncation symbol.

Abstract: A wireless communication system employs a method and apparatus for selectively communicating in the wireless communication system based on varying time incremental costs of communication. A communication unit (116) receives a transmission (118) from the system infrastructure of the wireless system, wherein the transmission indicates a time incremental cost of future communications as temporarily established by the system infrastructure. Responsive to receiving the transmission, the communication unit determines whether the received time incremental cost is acceptable to a user of the communication unit (e.g., whether the received cost is less than or equal to a previously stored desired cost or whether, after displaying the received cost to the user, the user has indicated his or her acceptance of the cost).

Abstract: A technique is used in a data terminal (110, 160) that encodes and decodes a data packet that is transmitted in a link of a frequency hopping system. During encoding, an information portion of the data packet is determined for transmission, a transmit redundancy check code is generated over the information portion and an identifier using a predetermined redundancy check code generator, and the data packet is generated to include the transmit redundancy check code and the information portion, but exclude the identifier. During decoding, the information portion and a received redundancy check code of the received data packet are determined, a calculated redundancy check code is generated over the information portion and the identifier, using the predetermined redundancy check code generator, and the information portion is rejected when the received redundancy check code does not match the calculated redundancy check code.

Abstract: An extendible antenna (10) includes an antenna rod (11) attached to a hinge (13) for rotational movement about a transverse axis (15) of the hinge (13). The hinge (13) is fitted within a housing (14) and is slidingly moveable therewithin. When the antenna rod (11) and the hinge (13) are in a fully extended position, the antenna rod (11) is pivotally rotatable relative to the housing (14) from a center position to either of two opposite end positions.