Mediatek Corporation

An-Bang Chen

Hsien-Chang Liu

Kung-Shuan Huang

Yun-Chang Chang

Shr-Cheng Li

An authorization system of a navigation device includes a first identification (ID) module and a second ID module. The first ID module is arranged to perform authorization for a first portion of the navigation device, and the second ID module is arranged to perform authorization for a second portion of the navigation device. The first and the second ID modules perform bidirectional authorization of the first and the second portions, and further determine behavior of the navigation device according to a result of the bidirectional authorization. An associated authorization method for controlling the navigation device is further provided.

Authorization system of navigation device and associated authorization method

A method and apparatus for obtaining Global navigation Satellite System (GNSS) time in a GNSS receiver are provided. The following steps are included: obtaining a time relationship between a first clock signal and the received GNSS time; obtaining a first clock value of a second clock signal and an first associated clock value of the first clock signal at a first time point; calculating a first GNSS time corresponding to the first clock value of the second clock signal according to the first associated clock value and the time relationship; obtaining a second clock value of the second clock signal and an second associated clock value of the first clock signal at a second time point; and calculating a second GNSS time corresponding to the second associated clock value, according to the first GNSS time, the first clock value and the second clock value of the second clock signal.

Methods and apparatus for obtaining GNSS time in a GNSS receiver

A method for obtaining GNSS time in a GNSS receiver includes: obtaining a time relationship between a first clock signal and the received GNSS time; obtaining a clock value Bof a second clock signal and further obtaining an associated clock value Aof the first clock signal to obtain a first pulse relationship at a first time point; calculating a GNSS time Ccorresponding to the clock value Aaccording to the time relationship; obtaining a clock value Bof the second clock signal and further obtaining an associated clock value Aof the first clock signal to obtain a second pulse relationship at a second time point; and calculating a GNSS time Caccording to the GNSS time C, the clock value B, and the clock value B. Exemplary values of A, B, C, AB, and Ccan be TTick, FN, TOW, TTick, FN, and TOW, respectively.

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Taipei, Taiwan

An-Bang Chen