Frequency acquisition and tracking circuit

专利名称：Frequency acquisition and tracking circuit发明人：Mingho Lu申请号：US11481895申请日：20060707公开号：US07630459B2公开日：20091208

专利附图：

摘要：A frequency acquisition circuit for compensating a frequency offset of a receivedsignal. A multiplier compensates the received signal according to a phase compensationsignal to generate a first compensation signal, wherein the first compensation signalcomprises 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 thefirst compensation signal. A phase evaluator generates a phase angle through a COSTAScircuit according to a real part and an imaginary part of the conjugate value andgenerates a phase angle signal according to the phase angle and the symbol length. Aphase accumulator for accumulating the phase angle signals of different symbols togenerate an accumulated phase angle signal. An oscillator generates the phasecompensation signal by looking up a table according to the accumulated phase anglesignal.

申请人：Mingho Lu

地址：Yunlin County TW

国籍：TW

代理机构：Birch, Stewart, Kolasch & Birch, LLP

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