Abstract: The present invention provides an antenna system and method for controlling an antenna pattern in a communication device. The antenna system comprises one or more rotatable antennas and one or more antenna reflectors. The one or more antenna reflectors are electrically isolated reflecting surfaces that are operationally coupled to the one or more rotatable antennas. The method comprises aligning the one or more rotatable antennas in one or more positions with respect to the one or more antenna reflectors so as to provide a repeatable antenna pattern.

Abstract: In a communication system, a privilege to access and to operate within a communication network (102) is granted to a terminal device (104) by use of a certificate from the communication network. In addition to granting privileges, the certificate may require the terminal device to update its software and configuration by requiring the terminal device to perform any combination of the following: downloading a different version of software and/or configuration, setting an allowable range of operation, and suspending operations outside of the allowed range. The communication network keeps a current list of type-approved software versions and configurations which the terminal device may utilize, and compares the software and configuration of the terminal device against the list to determine appropriate measures.

Abstract: A radio device (10) having radio device information specific to the radio device, for example regulatory summary file (18) and specification information, stored thereon. In some embodiments, the radio device information may be displayed on the radio device. The radio device may also include a radio device information server address, for example a Universal Resource Locator (URL) link to an information server (30) for accessing the radio device information locally from the radio device or from a remote client (40).

Abstract: A receiver (10) corrects for dynamic DC offsets by utilizing an open loop predictive DC offset correction stage (18) to respond instantly to changes in AGC settings on a timeslot by timeslot basis. The receiver has an AC coupled baseband receiver and has memory (22) for storing calibration offset data (24 and 26) representing a calibration offset voltage value for each automatic gain control (AGC) state determined relative to a known reference value. The predictive DC offset stage (18) predicts a predictive DC offset correction value (74 and 76) for a selected timeslot using stored calibration offset data (24 and 26) and an average of stored calibration offset data corresponding to AGC states for all timeslots in a given frame.

Abstract: A receiver module 140 controls the amplitude of a random burst signal 200 in a TDMA system. A random burst signal 200 presence detector 330 detects when the random burst signal 200 has arrived during a timeslot reserved for the random access burst 200. After detection, a control processor monitors the signal strength or amplitude of the random access burst 200 for a predetermined time period, determines the amount of AGC attenuation required, and inserts the required AGC attenuation to control the amplitude of the random access burst 200 for the duration of the timeslot.

Abstract: A receiver 200 automatically compensates for intermodulation of an input signal. The receiver 200 is preceded by a receiver front-end 105 which is coupled to antennas 100-102 receiving the signal. The gain of the antenna path/frequency is calibrated and stored for all combinations of antenna path/frequency. When a signal is received, the receiver 200 determines the correct stored gain factor representing the antenna receiving the signal and the frequency of the signal. The gain factor is compared against a predetermined threshold, and if the gain factor is greater than the threshold, an attenuator 400 placed at the front of the receiver 200 is inserted to optimize signal intermodulation. If the gain factor less than the threshold, the attenuator 400 is bypassed to optimize the sensitivity of the receiver 200.