Abstract: Disclosed are methods, circuits and systems for generating satellite navigation beacon signals. There is provided a multi-system beacon transmitter adapted to generate a beacon signal for navigation systems. The multi-system beacon transmitter may include: (1) a baseband data processor adapted to process a navigation data based data signal in baseband; (2) an adjustable radio-frequency (RF) transmission module adapted to process and up-convert the baseband data signal, and further adapted to transmit the RF signal via one or more functionally associated antenna(s); and (3) a multi-system interfacing module adapted to convey the navigation signal and to control the RF transmission module based on a determined RF transmission mode. The determined RF transmission mode may be selected from a set of navigation system transmission modes. The need for external frequency selectable elements (e.g. filters) may be obviated.

Abstract: Disclosed are methods, circuits and systems for regulating the output power of a transmission system. There may be provided a power amplifier (“PA”) adapted to operate across a range of supply voltages. The PA may operate under different bias profiles. There may be provided power amplifier regulation circuitry which may include a PA bias profile generator adapted to generate one or more bias profiles, wherein a given bias profile is associated with a given bias signal for the PA. A bias profile associated with a given bias signal for a given PA may include one or more PA parameters or settings to be applied to the given PA when it is operating with the given bias signal.

Abstract: Disclosed are methods, circuits and systems for modulating supply voltage to a power amplifier. An input voltage signal may be received and used to drive a switching regulator (or the like), which regulator may be adapted to modulate (convert) battery supply voltage into a supply voltage of an amplifier. An output signal combining stage may include a signal combiner which may be adapted to combine a modulated battery supply voltage (i.e. modulated by the input voltage) with a residual error correction signal (RECS). The residual error correction signal may be based on an estimate of the switching regulator characteristics. The estimate may be at least partially based on feedback from an output of the regulator. The estimate may be at least partially based on a prediction model of the switch regulator.