Invention Grant
US09124451B2 Frequency correction circuit, radio receiving apparatus, and frequency correction method 有权
频率校正电路,无线电接收装置和频率校正方法

Frequency correction circuit, radio receiving apparatus, and frequency correction method
Abstract:
A radio receiving apparatus according to the present invention receives a preamble signal through one frequency band and also detects a periodic symbol timing in a receiving period of a part of a symbol that composes the preamble signal. A frequency correction circuit includes a generating unit, a detecting unit, and a correction unit. The generating unit generates a detection window of a predetermined time width including each of a first and a second symbol timing that are previously determined among the periodic symbol timings in the receiving period of a remaining symbol that composes the preamble signal. The detecting unit sequentially receives a correlation value between the preamble signal and a reference signal and detects a maximum value from the correlation value input during a period when the detection window is opened. The correction unit corrects a frequency deviation of the one frequency band based on the maximum value.
Information query
Patent Agency Ranking
0/0