National Yang Ming Chiao Tung University

Yu-Hwai Tseng

Shyh-Jye Jou

Hung-Chih Liu

Wei-Che Lee

Zheng-Chun Huang

Chih-Wei Jen

Chia-Chi Huang

Kang-Lun Chiu

Ping-Ju Lin

Pai-Hsiang Shen

A method of synchronization of wireless communication system is provided. The method includes the following steps: receiving a symbol from a wireless communication system by a user equipment; detecting ISI-free region of the received symbol; setting an endpoint of a FFT window within the ISI-free region; detecting shifted primary control frequency and shifted secondary control frequency of the symbol; calculating ICFO based on the shifted primary control frequency and a primary control frequency; calculating secondary control frequency based on ICFO and shifted secondary control frequency; finding the preamble of a frame based on the secondary control frequency; and determining, based on the preamble, a start point of the frame.

Method and architecture of synchronization of wireless communication system

A baseband system includes: an estimation and compensation circuit estimating frequency-independent non-ideal effects based on an original IQ signal pair, and compensating the original IQ signal pair based on a result of the estimation to obtain a compensated IQ signal pair; a channel estimation and equalization circuit performing channel estimation and equalization based on the compensated IQ signal pair to obtain an equalized IQ signal pair; and a tracking and compensation circuit obtaining a result of tracking of residual quantities of the aforesaid non-ideal effects based on the equalized IQ signal pair, and compensating the equalized IQ signal pair based on the result of the tracking to obtain an output IQ signal pair.

Baseband system for a wireless receiver and baseband signal processing method thereof

A communication system includes a baseband circuit, a transmitting end circuit, and a receiving end circuit is disclosed. The transmitting end circuit includes a digital analog conversion circuit and a transmitting end filtering circuit. The receiving end circuit includes a receiving end amplifying circuit, a receiving end filtering circuit, and an analog digital conversion circuit. A first data signal is transmitted to the analog digital conversion circuit through the digital analog conversion circuit and the transmitting end filtering circuit, so that the baseband circuit obtains a first compensation parameter. A second data signal is transmitted to the receiving end filtering circuit, the receiving end amplifying circuit and the analog digital conversion circuit through the digital analog conversion circuit and the transmitting end filtering circuit, so that the baseband circuit obtains a second compensation parameter. The baseband circuit performs calibration according to the first and the second compensation parameter.

Communication system

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Taipei, Taiwan

Yu-Hwai Tseng