摘要:
A Bluetooth low energy (BLE) beacon device and a BLE advertising method are provided. The BLE advertising method includes: enabling a broadcast action with different advertising packets simultaneously, wherein the advertising packets include connectable and unconnectable advertising packets; setting advertising time information of the advertising packets; setting advertising data and an advertising packet address code; and executing the broadcast action for the advertising packets in sequence according to the advertising time information and the type of each of the advertising packets.
摘要:
The present invention relates to an adaptive, cost-performance efficient, power-saving apparatus for wireless communication systems, such as but not limited to Bluetooth (BT) receivers, and in particular to a packet-based receiver's decoding algorithm which can detect the presence or absence of the adjacent channel interference (ACI) before the scheduled starting time for receiving a Bluetooth packet, and accordingly set the receiver configurations including the filter's pass-band bandwidth (BW), filter's order, the sampling rate, the number of analog-to-digital-converter (ADC) output bits, and the automatic-gain-control (AGC) algorithm unit to determine the low noise amplifier (LNA) and variable gain amplifier (VGA) settings.
摘要:
The present invention discloses a circuit with three-stage of power-on sequence used for suppressing the pop noise in audio system. It mainly comprises a first resistor (R1); a capacitor (Cout); a first switch (SW1); a second switch (SW2); a soft start device; a first feedback amplifier; and a second feedback amplifier. By using the three-stage of power-on sequence, the present invention can effectively suppress the pop noise when the audio driver is power on.
摘要:
The present invention relates to an adaptive, cost-performance efficient, power-saving apparatus for wireless communication systems, such as but not limited to Bluetooth (BT) receivers, and in particular to a packet-based receiver's decoding algorithm which can detect the presence or absence of the adjacent channel interference (ACI) before the scheduled starting time for receiving a Bluetooth packet, and accordingly set the receiver configurations including the filter's pass-band bandwidth (BW), filter's order, the sampling rate, the number of analog-to-digital-converter (ADC) output bits, and the automatic-gain-control (AGC) algorithm unit to determine the low noise amplifier (LNA) and variable gain amplifier (VGA) settings.
摘要:
The present invention relates to an adaptive, high cost-performance efficient, and power-saving receiving method used for wireless communication systems, such as but not limited to Bluetooth (BT) system, in particular to a method which can detect the presence or absence of the adjacent channel interference (ACI) before the scheduled starting time for receiving a Bluetooth packet, and accordingly set the receiver configurations including the filter's pass-band bandwidth (BW), filter's order, the sampling rate or the number of analog-to-digital-converter (ADC) output bits, and the automatic-gain-control (AGC) algorithm to determine the low noise amplifier (LNA) and variable gain amplifier (VGA) settings
摘要:
The present invention discloses a method and apparatus to provide, effectively and robustly, a phase reference in phase-domain for digital phase-modulated signals. Not only the first-order but also higher order PLLs are delineated for robust and fast tracking of frequency errors and time-varying frequency errors between the transmitter and the receiver. This invention can be applied to any phase-modulated signal such as PSK, DPSK, π/4-DPSK, and CPM. The decoders with this invention can achieve close to the performance of coherent detection.Reference[1] D. Divsalar and M. K. Simon, “Multiple-symbols differential detection of MPSK,” IEEE Trans. Commun., vol. 38, pp. 300-308, March 1990.[2] Specification of the Bluetooth System, 2.0+EDR, 4 Nov. 2004.
摘要翻译:本发明公开了一种在数字相位调制信号的相域中有效且鲁棒地提供相位参考的方法和装置。 不仅描述了一阶但是更高阶的PLL,以便在发射机和接收机之间的频率误差和时变频率误差的鲁棒和快速跟踪。 本发明可以应用于诸如PSK,DPSK,& / 4-DPSK和CPM之类的任何相位调制信号。 本发明的解码器可以实现接近相干检测的性能。 参考文献[1] D. Divsalar和M.K.Simon,Multiple-symbols differential detection of MPSK,IEEE Trans。 Commun。,vol。 38,pp。300-308,March 1990. [2]蓝牙系统规范,2.0 + EDR,2004年11月4日。
摘要:
A speech detection method is presented, which includes the following steps. A first voice captured device samples a first signal and a second voice captured device samples a second signal. The first voice captured device is closer to a speech signal source than the second voice captured device. A first energy corresponding to the first signal within an interval is calculated, a second energy corresponding to the second signal within the interval is calculated, and a first ratio is calculated according to the first energy and the second energy. The first ratio is transformed into a second ratio. A threshold value is set. It is determined whether the speech signal source is detected by comparing the second ratio and the threshold value.
摘要:
The present disclosure illustrates a speaker apparatus and a speaker apparatus system, wherein the speaker apparatus includes a communication unit, an audio codec, a sound unit and a clock unit. The audio codec is coupled to the communication unit. The sound unit is coupled to the audio codec. The clock unit is coupled to the communication unit. The communication unit is configured for wirelessly receiving and broadcasting audio data. The audio codec is configured for decoding the audio data and generating an analog signal according to the decoded audio data. The sound unit is configured for transforming the analog signal into an acoustic wave. The clock unit synchronizes with at least one other speaker apparatuses by a synchronous signal.
摘要:
The present disclosure illustrates a multi-systems integrated modulation module. The modulation module includes a first modulation circuit and a second modulation circuit. The first modulation circuit includes a high frequency oscillator and high frequency mixers. The second modulation circuit includes a low frequency oscillator and low frequency mixers. The second modulation circuit couples to the first modulation circuit. The high frequency mixers couple to the high frequency oscillator and the low frequency mixers couple to the low frequency oscillator. The high frequency mixers and the low frequency mixers provide high frequency signals and low frequency signals separately. The frequency mixers mix radio frequency signals with the high frequency signals or low frequency signals. The modulation module forms a first signal path by the first modulation circuit, and forms a second signal path by the first modulation circuit and the second modulation circuit.
摘要:
A voltage generator is disclosed. The voltage generator includes an operational amplifier, an offset voltage tuner, and an output stage circuit. The operational amplifier receives an input voltage and adjusts an offset voltage of the operating amplifier according to a control signal. The offset voltage tuner provides the control signal. The output stage circuit generates an output voltage according to a voltage on an output terminal of the operational amplifier, and provides the output voltage to the operational amplifier.