Abstract: A frequency acquisition circuit for compensating a frequency offset of a received signal. A multiplier compensates the received signal according to a phase compensation signal to generate a first compensation signal, wherein the first compensation signal comprises a preamble and a plurality of symbols, and each of the symbols has a symbol length. A correlator generates a conjugate value according to symbols adjacent to the first compensation signal. A phase evaluator generates a phase angle through a COSTAS circuit according to a real part and an imaginary part of the conjugate value and generates a phase angle signal according to the phase angle and the symbol length. A phase accumulator for accumulating the phase angle signals of different symbols to generate an accumulated phase angle signal. An oscillator generates the phase compensation signal by looking up a table according to the accumulated phase angle signal.

Abstract: A frequency acquisition circuit for compensating a frequency offset of a received signal. A multiplier compensates the received signal according to a phase compensation signal to generate a first compensation signal, wherein the first compensation signal comprises a preamble and a plurality of symbols, and each of the symbols has a symbol length. A correlator generates a conjugate value according to symbols adjacent to the first compensation signal. A phase evaluator generates a phase angle through a COSTAS circuit according to a real part and an imaginary part of the conjugate value and generates a phase angle signal according to the phase angle and the symbol length. A phase accumulator for accumulating the phase angle signals of different symbols to generate an accumulated phase angle signal. An oscillator generates the phase compensation signal by looking up a table according to the accumulated phase angle signal.