An apparatus and method are provided for reducing the output voltage in a power amplifier. The power amplifier contains a power supply, an amplifier stage, an impedance matching circuit, and a voltage reduction unit connected between the power supply and the amplifier stage. A power amplifier device within the amplifier stage has a gain bandwidth that covers multiple frequency bands. The output voltage of the power amplifier device is a composite voltage that contains fundamental and harmonic components that lie within the gain bandwidth. The voltage reduction unit reduces the supply voltage of the power amplifier device such that the composite output voltage is less than the breakdown voltage in the power amplifier device. The impedance matching circuit is coupled to the power amplifier device output and provides impedance matching for output signals of the fundamental and harmonic frequencies.

A method and system for visualizing the propagation of a radio-frequency (RF) signal between a first wireless device and a second wireless device is provided. The method includes segmenting (304) the RF signal along its propagation path, based on the one or more characteristics associated with the propagation of the RF signal. The method also includes visualizing (306) the segments by using graphical representations.

An apparatus and method for synchronization between uncoordinated Time Division Duplex (TDD) communication networks includes a first step (300) of measuring an interference level on channels available to a base station. A next step (302) includes choosing the channel having the lowest interference level. A next step (304) includes determining that the interference is from a base station. A next step (306) includes calculating an interference profile over the frame cycle. A next step (308) includes establishing a peak interference level. A next step (310) includes aligning the base station frame timing in response to the peak interference level.

Various embodiments are described for potentially improving coverage and/or the cell-edge outage rate and thereby the system capacity. Logic flow diagrams 10 and 20, in FIGS. 1 and 2, depict functionality performed by communication devices in the system. A first communication device, attempting to successfully receive (12) signaling from a source communication device, transmits (14) signaling indicating that it is requesting an interfering communication device to reduce transmissions that may be interfering with signaling from the source communication device. In response to this signaling from the first communication device (22), the interfering communication device reduces (24) transmissions based at least in part on what was indicated by the signaling from the first communication device. Thus, cooperative interference reduction may be achieved dynamically by receiving devices signaling other devices in the system to request interference relief when needed.

A method and system for communicating over an access channel in a network are disclosed. The method includes receiving a request at the network device (102) from a first communication device (104), to initiate a group call. The method also includes the transmission of the control channel capsule (402) from the network device (102) to at least one communication device. The control channel capsule (402) comprises one or more pages associated with at least one communication device. The method also includes receiving access requests from the at least one communication device at the network device (102) by using access slots. These access slots are determined, based on the index value of each page in the control channel capsule (402).