Method and apparatus for power control in a transmitter

A transmitter with improved average power, comprising:

• a processor for receiving an input signal comprising symbols for transmission, wherein the processor is programmed to perform the steps of:
• determining an output signal for a symbol period from a predetermined range of symbols of the input signal in combination with a modulating phasor vector and a matrix of filter coefficients;
• comparing samples of the output signal with a predetermined amplitude limit;
• and,
• in response to a sample of the output signal exceeding the predetermined amplitude limit, to:
• adjusting the symbols of the predetermined range of symbols that are not pilot symbols by a first adjustment factor, thereby creating a new input signal;
• and
• computing a new output signal from the new input signal in combination with the modulating phasor vector and the matrix of filter coefficients, and
• wherein the transmitter further comprises:
• an exciter coupled to the processor for generating a power-controlled modulated radio signal from the new output signal;
• and
• wherein the processor is further programmed, in response to the predetermined range of symbols of the input signal corresponding to a current symbol index not being adjusted in the adjusting step, to perform the steps of:
• changing the current symbol index that points to a starting point of the predetermined range of symbols to a symbol index one symbol later in the input signal, thereby creating a new predetermined range of symbols;
• and
• repeating the determining, comparing, adjusting, and computing steps, substituting the new predetermined range of symbols in the determining and adjusting steps.