Abstract: The present invention provides a method and an apparatus for controlling a Q-factor for a filter. The method comprises stabilizing an active feedback to provide a variable feedback in a filter, varying the active feedback based on an input signal to the filter, and producing a desired Q-factor for the filter at a first frequency band, in response to the variable feedback. The method further comprises reconfiguring a center frequency and a bandwidth of the filter based on a channel bandwidth of the input signal to the filter to adjust the Q-factor for the filter in response to a second frequency band different than the first frequency band. By reconfiguring a center frequency and a bandwidth of a filter, the Q-factor for the filter, such as a flexible or reconfigurable filter, may be controlled across a multiplicity of frequency band signals.

Abstract: The present invention provides a device for measuring a pilot channel output power of a transmitter, such as a base station transmitting spread spectrum signals. For example, the device may include a detector to deliver an analog signal or a digital number that is proportional to a code domain power of a pilot channel. In one embodiment, a signal metric measuring device may use a detector that measures power of a pilot channel of a transmitter associated with a communication node in a wireless network. The detector may obtain an indication that is proportional to the power of the pilot channel of a transmit signal from the transmitter and use that indication of the power of the pilot channel for controlling a control loop in the transmitter. As a result, a desired level of an output power of the communication node, such as a base station (e.g., Node B) in a wireless network, such as a digital cellular network may be maintained.

Abstract: The present invention provides a method and an apparatus for using power of a pilot channel to control an output power from a transmitter, such as a base station transmitting spread spectrum signals. In one embodiment, a method for controlling an output power from a transmitter associated with a communication node (e.g., Node B) in a wireless network, such as a digital cellular network is provided. The method comprises extracting an indication of a pilot channel power from a portion of an output signal of the transmitter and controlling a control loop having one or more control devices in the transmitter based on the indication of a pilot channel power such that the pilot channel power stays substantially constant over a period of time. In this manner, using a closed power loop controller, a transmitter may overcome the problem of measuring the power of a non-constant spread spectrum signal and a traffic independent measure may control a cell size.

Abstract: The present invention provides a method and an apparatus for assessing a capability, for example, linearity of an amplifier, such as that of a power amplifier including a radio frequency amplifier. In one embodiment, the method comprises defining a first figure of merit for a power amplifier based on a loss of linearity relative to a predefined linearity requirement for the power amplifier and/or defining a second figure of merit based on the first figure of merit and dependent upon a minimum frequency within a predefined frequency band for the power amplifier, characterizing the linearity thereof. In this manner, using a test setup, for digital mobile communication networks deploying one or more higher order modulation schemes with complex wireless transmission that results in non-constant envelope signals, linearity of power amplifiers in transceivers, such as a mobile station or a base station, may be sufficiently described.

Abstract: An electronic card is provided that is configured for removable insertion by a user in a digital image storage card slot of a digital camera. The electronic card includes a wireless telecommunications transmitter operative to transmit images taken using the camera for remote storage or display.