设计了一种用于解调GFSK信号的时间数字转换器(Time Digital Converter,TDC),该时间数字转换器主要由延时链、D触发器、延时校准电路等组成.TDC对中频信号进行采样,将信息从频率信号转换到二进制码.延时校准电路保证延时单元的延时准确....设计了一种用于解调GFSK信号的时间数字转换器(Time Digital Converter,TDC),该时间数字转换器主要由延时链、D触发器、延时校准电路等组成.TDC对中频信号进行采样,将信息从频率信号转换到二进制码.延时校准电路保证延时单元的延时准确.TDC采用TSMC 0.18μm CMOS工艺实现,版图面积为0.08mm2.仿真结果表明,TDC的最大微分非线性为0.07LSB,最大积分非线性为-0.17LSB,功耗0.9mW,最大抗频率失调范围为±350kHz.展开更多
基础运动技能群是各项运动技能学习的基础及不可逾越的辅助工具,是学校体育发展的"铺路石"。目前对运动技能学习研究较多,但系统研究基础运动技能群学习与评价方法的甚少。研究目的:根据运动技能学习研究理论与实践,构建基础...基础运动技能群是各项运动技能学习的基础及不可逾越的辅助工具,是学校体育发展的"铺路石"。目前对运动技能学习研究较多,但系统研究基础运动技能群学习与评价方法的甚少。研究目的:根据运动技能学习研究理论与实践,构建基础运动技能优化群模型,设计技能群指标,提出系统评价方法。以Movement Education and Fleishman的知觉运动能力与身体素质能力为主线,根据我国学校体育的实际情况,从Movement Education的身体意识、空间、运动特点和关联等要素中,把基础运动技能群归化分为九大类别:跑、跳、投、空间判断、传接物体、踢、滚翻、平衡和悬垂,构建了五大基础运动技能优化群与评价指标,发展与促进知觉运动能力与身体素质能力,对田径、篮球、足球、体操等项目技能发展具有重要作用。展开更多
This paper presents a novel and cost effective method to be used in the optimization of the Gaussian Frequency Shift Keying (GFSK) at the receiver of the Bluetooth communication system. The proposed method enhances th...This paper presents a novel and cost effective method to be used in the optimization of the Gaussian Frequency Shift Keying (GFSK) at the receiver of the Bluetooth communication system. The proposed method enhances the performance of the noncoherent demodulation schemes by improving the Bit Error Rate (BER) and Frame Error Rate (FER) outcomes. Linear, Extended, and Unscented Kalman Filters are utilized in this technique. A simulation model, using Simulink, has been created to simulate the Bluetooth voice transmission system with the integrated filters. Results have shown improvements in the BER and FER, and that the Unscented Kalman Filters (UKF) have shown superior performance in comparison to the linear Kalman Filter (KF) and the Extended Kalman Filter (EKF). To the best of our knowledge, this research is the first to propose the usage of the UKF in the optimization of the Bluetooth System receivers in the presence of additive white Gaussian noise (AWGN), as well as interferences.展开更多
This paper presents a low power, high sensitivity Gaussian frequency shift keying （GFSK） demodu- lator with a flexible frequency offset canceling method for wireless networks for industrial automation process automa...This paper presents a low power, high sensitivity Gaussian frequency shift keying （GFSK） demodu- lator with a flexible frequency offset canceling method for wireless networks for industrial automation process automation （WIA-PA） transceiver fabricated in 0.18 #m CMOS technology. The receiver uses a low-IF （1.5 MHz） architecture, and the transmitter uses a sigma delta PLL based modulation with Gaussian low-pass filter for low power consumption. The active area of the demodulator is 0.14 mm2. Measurement results show that the proposed demodulator operates without harmonic distortion, deals with 4-180 kHz frequency offset, needs SNR only 18.5 dB at 0.1% bit-error rate （BER）, and consumes no more than 0.26 mA from a 1.8 V power supply.展开更多
文摘设计了一种用于解调GFSK信号的时间数字转换器(Time Digital Converter,TDC),该时间数字转换器主要由延时链、D触发器、延时校准电路等组成.TDC对中频信号进行采样,将信息从频率信号转换到二进制码.延时校准电路保证延时单元的延时准确.TDC采用TSMC 0.18μm CMOS工艺实现,版图面积为0.08mm2.仿真结果表明,TDC的最大微分非线性为0.07LSB,最大积分非线性为-0.17LSB,功耗0.9mW,最大抗频率失调范围为±350kHz.
文摘基础运动技能群是各项运动技能学习的基础及不可逾越的辅助工具,是学校体育发展的"铺路石"。目前对运动技能学习研究较多,但系统研究基础运动技能群学习与评价方法的甚少。研究目的:根据运动技能学习研究理论与实践,构建基础运动技能优化群模型,设计技能群指标,提出系统评价方法。以Movement Education and Fleishman的知觉运动能力与身体素质能力为主线,根据我国学校体育的实际情况,从Movement Education的身体意识、空间、运动特点和关联等要素中,把基础运动技能群归化分为九大类别:跑、跳、投、空间判断、传接物体、踢、滚翻、平衡和悬垂,构建了五大基础运动技能优化群与评价指标,发展与促进知觉运动能力与身体素质能力,对田径、篮球、足球、体操等项目技能发展具有重要作用。
文摘This paper presents a novel and cost effective method to be used in the optimization of the Gaussian Frequency Shift Keying (GFSK) at the receiver of the Bluetooth communication system. The proposed method enhances the performance of the noncoherent demodulation schemes by improving the Bit Error Rate (BER) and Frame Error Rate (FER) outcomes. Linear, Extended, and Unscented Kalman Filters are utilized in this technique. A simulation model, using Simulink, has been created to simulate the Bluetooth voice transmission system with the integrated filters. Results have shown improvements in the BER and FER, and that the Unscented Kalman Filters (UKF) have shown superior performance in comparison to the linear Kalman Filter (KF) and the Extended Kalman Filter (EKF). To the best of our knowledge, this research is the first to propose the usage of the UKF in the optimization of the Bluetooth System receivers in the presence of additive white Gaussian noise (AWGN), as well as interferences.
基金Project supported by the National High Technology Research and Development Program of China(No.2011AA040102)
文摘This paper presents a low power, high sensitivity Gaussian frequency shift keying （GFSK） demodu- lator with a flexible frequency offset canceling method for wireless networks for industrial automation process automation （WIA-PA） transceiver fabricated in 0.18 #m CMOS technology. The receiver uses a low-IF （1.5 MHz） architecture, and the transmitter uses a sigma delta PLL based modulation with Gaussian low-pass filter for low power consumption. The active area of the demodulator is 0.14 mm2. Measurement results show that the proposed demodulator operates without harmonic distortion, deals with 4-180 kHz frequency offset, needs SNR only 18.5 dB at 0.1% bit-error rate （BER）, and consumes no more than 0.26 mA from a 1.8 V power supply.
