Abstract: A receiver (200) receives (402) a first signal including a sync portion (308) having a carrier acquisition segment (302) and a timing synchronization pattern (304), and a processing system (216) of the receiver calculates (404) a first plurality of squared magnitude Fourier transforms at a first plurality of frequencies on the carrier acquisition segment. The processing system derives (406) an initial carrier frequency error estimate by locating a peak in the first plurality of squared magnitude Fourier transforms, and corrects (408) the sync portion according to the initial carrier frequency error estimate, thereby producing a carrier-corrected sync portion. The processing system then removes (410) the timing synchronization pattern from the carrier-corrected sync portion, thereby producing a second signal having a residual carrier error.

Abstract: A processor (120) receives an input signal including symbols for transmission, and determines 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. The processor compares 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, adjusts the symbols of the predetermined range of symbols that are not pilot symbols by an adjustment factor, thereby creating a new input signal. If a sample of the output signal exceeds the predetermined amplitude limit, the processor computes a new output signal from the new input signal in combination with the modulating phasor vector and the matrix of filter coefficients; and generates a power-controlled modulated radio signal from the new output signal.

Abstract: A communication receiver (300) receives (404) a modulated signal, and demodulates the modulated signal to recover a timing signal (202) and a data signal (204) including data symbols. A processing system (316) of the communication receiver determines (406) a rough symbol timing from the timing signal, and forms (408) a timing-carrier search matrix by computing signal quality metrics from the data symbols as a function of predetermined trial variations of the carrier frequency about a nominal carrier frequency and as a function of predetermined trial variations of the symbol timing about the rough symbol timing. The processing system then estimates (410) the symbol timing and the carrier frequency by locating a minimum one of the plurality of signal quality metrics in the timing-carrier search matrix.