| 摘要 |
An integer frequency offset estimation apparatus and a method therefor are provided to consume low power and estimate an integer frequency offset at high speed. The first to the Nth storing units(10,12,14) divide demodulated PRSs(Phase Reference Symbols) by N, and store the N-divided PRSs. An address generating unit(16) generates addresses for writing the PRSs in the first to the Nth storing units(10,12,14) and reading the PRSs from the first to the Nth storing units(10,12,14). A PRS generating unit(20) generates the PRSs, and outputs the generated PRSs as reference PRSs. A correlation calculating unit(22) calculates sample correlation values between the N PRSs read from the first to the Nth storing units(10,12,14) and the N reference PRSs. A frequency offset output unit(24) adds the sample correlation values, generates the last correction values, and outputs the maximum value among the last correction values as an integer frequency offset value.
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