摘要:
An electronic apparatus is disclosed. The electronic apparatus comprises a random access memory (RAM), a read-only memory (ROM) and a processing unit. The RAM stores a call transfer table, wherein the call transfer table comprising at least one transferred address in the RAM. The ROM stores at least one code to call one address of the call transfer table. The processing unit executes the code in the ROM and reads the transfer table accordingly, then transfers to run the data in the transferred address of the RAM.
摘要:
Methods and apparatuses for searching for satellite signals are provided. One of the proposed methods of searching for satellite signals includes: searching for satellite signals according to measurement predictions; searching for satellite signals of a reference satellite without referring to the measurement predictions; determining if measurements derived from the reference satellite are consistent with the measurement predictions; and searching for satellite signals of other satellites without referring to the measurement predictions if the measurements derived from the reference satellite are determined to be inconsistent with the measurement predictions. If the measurements derived from the reference satellite are determined to be inconsistent with the measurement predictions, navigation information for use in the generation of the measurement predictions is determined to be stale.
摘要:
An optical recording system includes an optical pickup, a power auto-control device, and a digital signal processor. The optical pickup includes a laser diode and a photo detector. The power auto-control device generates a drive voltage for driving the laser diode to generate a recording light beam incident upon an optical storage medium. The photo detector is operable to generate a sub-beam added signal from light that was reflected by the optical storage medium and that was detected by the photo detector during recording using the recording light beam. The digital signal processor compares the sub-beam added signal from the photo detector with a predetermined target value, and enables the power auto-control device to adjust the drive voltage in such a manner that the sub-beam added signal approaches the predetermined target value based on result of the comparison made by the digital signal processor.
摘要:
A method for determining a Doppler shift of a first signal is provided. First, a plurality of Doppler frequency hypotheses is combined to obtain a joint Doppler signal. The first signal is the correlated according to the joint Doppler signal and a plurality of code signals with phases corresponding to a series of code phase hypotheses to obtain a series of correlation results which are then examined to determine whether the Doppler shift does lie in the Doppler hypotheses. A fine Doppler search is then performed to determine the Doppler shift when the Doppler shift lies in the Doppler hypotheses.
摘要:
A communications system includes a first oscillator for producing a first clock signal; a second oscillator for producing a second clock signal; and a secondary circuit coupled to the first oscillator and the second oscillator for determining a second oscillation frequency corresponding to a frequency of the second clock signal; the second oscillation signal being determined according to the first clock signal, the second clock signal, and a first oscillation frequency corresponding to a frequency of the first clock signal.
摘要:
A spreading signal acquisition and tracking method and apparatus is proposed. In accordance with the present invention, coherent integrations are performed by segments and stored for a non-coherent integration. A better freedom of the non-coherent interval selection is provided. The window of the non-coherent integration is sequentially and gradually shifted to achieve better update rate to its detection circuit and to improve searching and tracking for a spreading signal. By using the present invention, rapid signal acquisition can be achieved even when intensity of the spreading signal is very weak, or even when deeper signal blocking or jamming occurs.
摘要:
A communications system includes a first oscillator for producing a first clock signal; a second oscillator for producing a second clock signal; and a secondary circuit coupled to the first oscillator and the second oscillator for determining a second oscillation frequency corresponding to a frequency of the second clock signal; the second oscillation signal being determined according to the first clock signal, the second clock signal, and a first oscillation frequency corresponding to a frequency of the first clock signal.
摘要:
A route planning triggering method is implemented in a route planning device and includes the following steps. An image is captured through an image capture device coupled to the route planning device. The position information of a geographical location is automatically generated from the captured image for planning a route to the location.
摘要:
Read focus error (FE) bias is calibrated on an embossed area of the optical disc. OPC is then performed with the calibrated servo signal bias to obtain a write power level. Data are written on and read from the optical disc based on the write power level and the calibrated servo signal bias.
摘要:
A device for canceling a land-groove offset component of a focusing error signal in an optical storage system includes first and second circuits, and an adder. The first circuit processes a radio (or wobble) frequency ripple signal to obtain a first processed signal that is multiplied by a first gain value (G1) so as to result in a first signal. The second circuit processes a tracking error signal to obtain a second processed signal that is multiplied by a second gain value (G2) so as to result in a second signal. The adder is coupled to the first and second circuits, and adds the first and second signals to produce a compensative land-groove offset component that is to be fed into a focusing device of the optical storage system so as to enable the focusing device to cancel out the land-groove offset component of the focusing error signal.
摘要翻译:用于消除光学存储系统中的聚焦误差信号的岸脊偏移分量的装置包括第一和第二电路以及加法器。 第一电路处理无线电(或摆动)频率纹波信号,以获得乘以第一增益值(G <1> 1)的第一处理信号,以便产生第一信号。 第二电路处理跟踪误差信号以获得乘以第二增益值(G SUB 2)的第二处理信号,以便产生第二信号。 加法器被耦合到第一和第二电路,并且相加第一和第二信号以产生补偿的岸脊偏移分量,该补偿的槽脊偏移分量被馈送到光学存储系统的聚焦装置,以使聚焦装置能够取消 输出聚焦误差信号的槽脊偏移分量。