FREQUENCY ERROR DETECTOR, FREQUENCY ERROR DETECTION METHOD AND RECEIVER

PROBLEM TO BE SOLVED: To provide a frequency error detector which can detect a carrier frequency error with small operation amount.SOLUTION: A first frequency error detection unit 21 includes a known signal extraction unit 31 for extracting a reception known signal from a complex symbol signal, a co...

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Bibliographic Details
Main Author MAEDA NAOTOSHI
Format Patent
LanguageEnglish
Published 13.03.2014
Subjects
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
MULTIPLEX COMMUNICATION
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
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Summary:PROBLEM TO BE SOLVED: To provide a frequency error detector which can detect a carrier frequency error with small operation amount.SOLUTION: A first frequency error detection unit 21 includes a known signal extraction unit 31 for extracting a reception known signal from a complex symbol signal, a complex operation unit 32 for performing first complex operation of a sequence of reception known signals and cancelling the phase rotation component, a reference signal supply unit 33 for supplying a sequence of reference complex signals generated by performing the same operation as the first complex operation of a sequence of known signals, a correlation operation unit 36 for calculating distribution of mutual correlation value between the output sequence from the complex operation unit and the sequence of reference complex signals, and a peak detection unit 37 for detecting a carrier frequency error by detecting a distribution having a maximum peak from these distributions.
Bibliography:Application Number: JP20120187725