Abstract: A communication device (100) includes an equalizer (126) for correcting imbalance between in-phase and quadrature components of a received signal. The equalizer (126) determines peak amplitude for the in-phase and quadrature components, and the phase imbalance between both components (440). At least one of the in-phase and quadrature components is adjusted based on a function of the phase imbalance, and of the ratio of peak amplitudes of the in-phase and quadrature components (450, 460).

Abstract: A subscriber unit handles incoming calls routed through an old server site while in the process of switching site affiliation to a new server site (500). The subscriber unit initiates the switching of site affiliation (510), and during the process, alternates between receiving communication from the new server site (520) and receiving communication from the old server site to monitor for an incoming call (530). When an incoming call routed through the old server site is detected (540), the subscriber unit aborts or suspends the switching process and accepts the incoming call through the old server site (551, 552).

Abstract: A radio communication system (100) has a subscriber unit (150) that operates to reduce registration requirements, particularly for power up operations. The subscriber unit (150) saves communication environment information before powering down, and restores the stored communication environment upon a subsequent power up, if the stored environment is deemed current (200, 300). Preferably, the subscriber unit (150) provides notification to the system of its powered up / down status (230, 335). The subscriber unit may complete a full power up registration process if the stored communication environment is determined to be outdated (360).

Abstract: A display module (100) includes a light pipe (140), a liquid crystal display (LCD) module (130), a lens cover (110), and a gasket (120), which are mated together to form a sealed assembly. The LCD module (130) and gasket (120) are captured between the lens cover(110) and light pipe (140), such that the gasket (120) provides a seal between the lens cover (110) and the LCD module (130). Preferably, the gasket (120) has at least one integrally formed button (122) that protrudes through a buttonhole (112) on the lens cover (110) to provide for external actuation of a switch (152) within the display module assembly (100).

Abstract: An electronic device (100) has a keypad (150) that is backed by holographic film material (155) to enhance keypad lighting and overall appearance. Images (252) are formed on the holographic film (155) to indicate button functionality, and switch actuator buttons (160) are embossed over the images. The switch actuator buttons (160) are preferably aligned with switches (260) such that depression of a button (160) actuates a corresponding switch (260).

Abstract: A radio frequency switch assembly (120) is mountable between an antenna port (110) and a detachable antenna (130) of a radio communication device assembly (100) to provide an interface for a radio frequency accessory. The switch assembly (120) has a radio interface port (123), a radio frequency accessory port (125), and an antenna interface port (127), and associated contacts (207, 216, 223). A mechanical switch alternatively interconnects the radio interface port (123) with the radio frequency accessory port (125) or with the antenna interface port (127). Preferably, the switch includes a conductive probe (213) that continuously engages the radio interface port contact (207) while being slidable to electrically interconnect with the antenna interface port contact (223) or with the radio frequency accessory port contact (216).

Abstract: A microstrip antenna (100) achieves wider bandwidth by using an asymmetric radiating structure (110). The radiating structure (110) supports at least two resonating modes, which are preferably a differential and a common resonating mode. A feed system (130, 135) is coupled to the radiating structure (110) to excite the respective resonating modes at different frequencies to provide a radiating band for communication signals. Preferably, the antenna (100) includes patch radiators (112, 114) of substantially different widths, and a buried microstrip line (130) that simultaneously feeds the patch radiators (112, 114).

Abstract: An encoder provides enhanced data encoding by manipulating encoding formats for standard data to effect transfer of additional data (300). Data recovery of the additional data is provided through a corresponding detection of decoding formats for decoding the standard data (400).

Abstract: In a communication environment (140) having multiple vehicular repeater systems (110, 120) operating according to a priority scheme designating primary responsibility for retransmitting signals, a vehicular repeater system (120) supports automatic transitioning from a non-priority mode to a priority mode (410, 420). The vehicular repeater system (120), when operating in a non-priority mode, detects that a communication signal was submitted for retransmission by a priority vehicular repeater system (440), and monitors for a particular time period to detect an acknowledgment signal (450). When no acknowledgment signal is detected within the particular period, the priority scheme is modified, preferably such that the non-priority vehicular repeater assumes priority repeater status (460).

Abstract: A communication device (200) includes apparatus (210) that selectively applies echo cancellation in the processing of an audio signal (207). The audio signal is processed for echo cancellation, and a modified audio signal obtained (410, 420, 430). The energy content of the modified audio signal is compared (440, 450) with that of the original audio signal. When the energy content of the modified audio signal exceeds that of the original audio signal, the unmodified audio signal is selected instead of the modified audio signal for further processing (450, 460, 470).

Abstract: A compensated signal source (210, 220) utilizes baseband signals and a radio frequency carrier signal to generate a set of source output signals (226, 227) which are coupled to a particular circuit (230, 240, 250). The signal source (210, 220) is operable in a characterizing mode in which a test configuration is applied, and outputs from the signal source and the particular circuit measured to develop parameters representing imperfections within the signal source and within the particular circuit. The signal source (210, 220) is operable in a normal mode, in which compensation based on the measured parameters is applied to account for the imperfections. In a preferred embodiment, the particular circuit (230, 240, 250) and compensated signal source (210, 220) form part of an amplifier (200) that implements linear amplification using nonlinear components (LINC) techniques.

Abstract: An electrical device assembly (120) has a removable signal cable assembly (180). The electrial device assembly (120) includes a circuit substrate (110) which is encapsulated by a device housing (121). The device housing (121) includes two mechanically coupled housing members (130, 140). The housing members (130, 140) are secured together by a retainer (190) mounted to a signal cable (181), that is removably connected to the electrical device assembly (120). Preferably, the housing members (130, 140) have overlapping loop portions (135, 145), and the retainer (190) mounted through the loop portions (135, 145) to secure the housing members (130, 140) together, and to secure the signal cable assembly (180) to the electrical device assembly (120).

Abstract: Enhanced detection of an FM signal is provided through the use of a coded pattern signal which is processed at a receiver (120) non-linearly to facilitate pattern detection. The received signal is conditioned to limit signal amplitudes according to a particular noise threshold (530, 540, 550). The conditioned signal is then processed to determine the presence of the coded pattern (560). In this manner, the probability of detecting signals in weak signal conditions can be enhanced, while maintaining a particular detection falsing rate.

Abstract: A communication device (100) incorporates a programmable function button (105) that operates in conjunction with a display (102). The button (105) operates in an execution mode when engaged for a time period less than a particular threshold (310, 320, 330, 340), and operates in a programming mode when continuously engaged for a time period greater than the threshold (310, 320, 330, 350). In the execution mode, the button causes execution of a preprogrammed function (340). When in the programming mode, continuous engagement of the button causes a successive presentation of a selectable programmable function on the display (410, 420, 430), and disengagement of the button automatically results in the button being programmed with the selectable programmable function (440, 450). Preferably, release of the button, when in programming mode, also causes automatic execution of the selectable programmable function (460).

Abstract: An apparatus (100) uses power recovery from a combining circuit (125) to improve efficiency. A power combiner (125) generates multiple output signals (127, 133) from a combination of input signals (113, 114). One of the output signals from the power combiner is coupled to a power recovery circuit (135), and energy is recovered and preferably stored for later use.

Abstract: A specific manual for configurable electronic equipment is produced by providing at least one generic manual; obtaining configuration information relating to the equipment (23); selecting parts of the generic manual applicable to the configuration (28); assembling the selected parts of the generic manual and at least some of the configuration information (24,30,31); and outputting the assembly as the specific manual (25).