Abstract: A method for setting system configuration of a computer connected with a one-to-many wireless device group during booting of the computer is provided. The wireless device group includes a wireless connector electrically connected to the computer and a wireless input device and a wireless audio device: The method of the invention comprises the steps of: setting the wireless connector in a first state to form wireless connection with the wireless input device; performing system configuration setup by a user through the wireless input device after the computer has loaded a Basic Input/Output System to perform Power-On Self Test and judge that the first state conforms to a test threshold; and triggering the wireless connector to switch to a second state of forming wireless connection with the wireless input device and wireless audio device so that the computer can transmit audio data to the wireless audio device through the wireless connector.

Abstract: This specification discloses a symbol timing recovery circuit, which includes a transform value generation circuit, a selection circuit, a plurality of accumulators, and a comparison module. Without performing phase difference calculation, the invention is a symbol timing recovery circuit that can directly use digital in-phase signal components and digital quadrature signal components of consecutive two symbols to obtain an optimal sampling point. The invention also provides a phase demodulator with a simple structure.

Abstract: The present invention relates to a circuit and method for symbol timing recovery in phase modulation systems. First, phase differences of in-phase signals and quadrature signals in a polar coordinate are generated at the same sampling points of neighboring symbols. Second, an operator is generated by taking a square of a value subtracting the phase difference from a default phase value. Third, the sums of phase differences of every sampling point in a symbol are computed to determine an optimal sampling point in a symbol period and correctly recover symbol timing of signal sequences. By the above properties, the present invention has a simple structure and can shorten an execution time.

Abstract: The present invention is an apparatus and method for performing a Gaussian Minimum Shift Keying baseband modulation based on a reference phase to be simplified. The invention mainly comprises: a memory unit storing a plurality of parameters and their corresponding tabular data of a low pass Gaussian filter, the parameters and their corresponding tabular data being simplified in advance; the low pass filter being used for reducing the bandwidth of the apparatus and increasing the utilization of the bandwidth; and a processing unit based on the input digital data and the tabular data in the memory unit to generate the digital in-phase signal In and the digital quadrature-phase signal Qn.

Abstract: The present invention is an apparatus and method for performing a &pgr;/4-DQPSK baseband modulation based on a signal mapping to be simplified. The apparatus mainly comprises a memory unit and as processing unit. The memory unit stores a plurality of parameters and their corresponding tabular data of a low pass filter, and the parameters and their corresponding tabular data are simplified in advance. The low pass filter is used for reducing the bandwidth of the apparatus and increasing the utilization of the bandwidth. The processing, unit bases on the input digital data and the tabular data in the memory unit to generate a digital in-phase signal In and a digital quadrature-phase signal Qn.