Lowe Hauptman Ham & Berner
Timing estimator in OQPSK demodulator
A timing estimator of an OQPSK demodulator is provided. In the timing estimator, an A/D converter converts an analog reception signal into a digital reception signal. A differential circuit section delays the digital reception signal from the A/D converter by a preset time and obtains a phase difference between a conjugate complex number signal of the delayed digital reception signal and the digital reception signal to offset a frequency error contained in the digital reception signal. A correlation operation section performs a correlation operation between a reference symbol differentiated in the same way as a differentiation of the differential circuit section and the reception signal to obtain each correlation value. A coherent detector detects a coherent point on the basis of the correlation value from the correlation operation section.
Samsung Electro-Mechanics Co., Ltd.
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H04L H04L H04L
inventional inventional inventional
Tah Joon Sang Hyun Shin Woo Koon Shik Hyung Jin Joo Hyun
Park Min Kang Cho Choi Do