Mediatek Corporation

Industrial Technology Research Institute

Mediatek Incorporation

Kun-Tso Chen

Chun-Nan Chen

Chih-Wei Chien

Chung-Hsin Hsiao

Tsung-Ying Tsai

A correlation computation method includes: performing, by a grouping circuit, a grouping operation upon a data sequence according to an in-phase code sequence and a quadrature code sequence, wherein the data sequence is derived from a quadrature phase shift keying (QPSK) modulated signal; performing at least one accumulation operation upon data samples categorized into at least one data sample group by the grouping operation, to generate at least one accumulation result; and deriving a correlation value between the data sequence and both of the in-phase code sequence and the quadrature code sequence from the at least one accumulation result.

Method and apparatus for performing efficient correlation computation between data sequence and both of in-phase code sequence and quadrature code sequence

The present invention provides a receiver including an RF circuit, a correlator and a signal delay estimator. The RF circuit is configured to receive a first satellite signal and a second satellite signal to generate a first base-band signal and a second base-band signal, respectively. The correlator is configured to use a first local signal to integrate with the first base-band signal to generate a first correlation result, and to use a second local signal to integrate with the second base-band signal to generate a second correlation result. The signal delay estimator is coupled to the correlator, and is configured to use the second correlation result to compensate the first correlation result to generate a compensated first correlation result, and determine a signal delay of the first satellite signal according to the compensated first correlation result.

Method of using multiple received satellite signals to compensate satellite multipath estimation error

A welding quality detection system and a welding quality detection method are provided. A detection device applies a force to at least one weld point of a first welded object or a second welded object that are welded together. A displacement detector detects a displacement signal that varies with the force or time between the first welded object and the second welded object based on the force. A detection module receives or records the displacement signal and determines whether a gap exists between the first welded object and the second welded object based on a slope of the displacement signal, so as to detect the welding quality of the weld point quickly and precisely.

Welding quality detection system and welding quality detection method

Methods and systems for detecting bit synchronization boundary in a received signal. A counter is set for defining a bit boundary of the received signal. Transitions in the received signal are detected and compared with the counter value as the transitions are expected to occur only at the bit boundary. The bit boundary is confirmed if a preset number of transitions aligned with the bit boundary.

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Hsinchu, Taiwan

Kun-Tso Chen