Abstract: A block edge detector (310) determines (510) whether a wireless communication transmission with a first modulation having excess spectral emissions will be transmitted at a frequency on a block edge (120). In response, a modulator selector (320) changes (530) the wireless communication transmission to a second modulation with lessened spectral emissions. Preferably, the second modulator (340) is operably coupled to an alternative lookup table (360) wherein phase trajectory entries likely to cause excess spectral emissions such as spurious emissions are smoothed. The entries may be smoothed by filtering, non-linear extrapolation, and/or linear extrapolation. Alternatively, the second modulator (340) uses an alternative lookup table (360) that is a GMSK modulator with BT less than 0.3.

Abstract: In the present technique of duplex local oscillator technique provided, a radio frequency local oscillator frequency and a duplex local oscillator frequency at a selected timeslot are assessed (516, 520) to provide a radio frequency local oscillator signal (518) and a duplex local oscillator signal (522), respectively. The duplex local oscillator signal and the radio frequency local oscillator signal are mixed (524) to provide a converted radio frequency local oscillator signal, which is then provided (526) for output.

Abstract: An access point (108) in a dual-frequency TDD communication system (100) includes a transceiver (122) that transmits information to a first group of subscriber devices (104a-n) at a first frequency (f1) and contemporaneously receives information from a second group of a subscriber devices (106a-n) at a second frequency (f2) during at least a portion of a period of time (T1). The access point (108) also transmits information to the second group of subscriber devices (106a-n) at the second frequency (f2) and contemporaneously receives information from the first group of subscriber devices (104a-n) at the first frequency (f1) during at least a portion of a second period of time (T3). A method for performing a dual-frequency communication scheme is also provided.

Abstract: An entry control system and method for permitting authorized users to access a controlled area by moving a barrier comprises a specific action button and an entry request device for accepting a user data input. A controller is operably coupled to the entry request device and the specific action button and having an output. The transmitter receives the user data input and an indication of a position of the barrier and determines based at least in part upon the user data input and the indication of the position of the barrier whether a first control signal should be generated at the output, the controller also receiving an indication of an actuation of the specific action button and selectively generating a second control signal at the output based at least in part upon the indication of the position of the barrier.

Abstract: An entry control system for allowing access permission to be granted remotely includes an access controller for generating an entry request signal. An authentication system coupled to the access controller determines whether prior authorization will cause prohibition of entry by a controller which holds an access permission state for a predetermined area of a controlled area.