The objective of this research is to track the phase changes in Binary Phase Shift Keying (BPSK) modulated signal in ZigBee communication systems using discrete Kalman Filter (KF). Therefore, Kalman Filtering is used ...The objective of this research is to track the phase changes in Binary Phase Shift Keying (BPSK) modulated signal in ZigBee communication systems using discrete Kalman Filter (KF). Therefore, Kalman Filtering is used to estimate and optimize the carrier phase of BPSK modulated signal, in the presence of Additive White Gaussian Noise (AWGN) channel, by minimizing the phase deviation error. Therefore, a simulation model, using MATLAB, will be created to demonstrate ZigBee transmission system with the impact of the integrated filter. The expected results will show that Kalman Filter tracks the phase of BPSK modulated signal correctly and the performance of tracking will be measured by Mean Square Error (MSE) with respect to Signal to Noise Ratio (SNR). This study proposes a new method of phase tracking in ZigBee receivers in the presence of AWGN channel which can be extended to Internet of Things (IoT) applications.展开更多
现有脉内复合调制波形存在调制方式简单、自相关旁瓣电平高的不足,致使发射波形在应用中易被截获且对弱目标检测性能较差。针对上述问题,在线性调频(linear frequency modulation,LFM)-Costas雷达波形中引入二相编码(binary phase shift...现有脉内复合调制波形存在调制方式简单、自相关旁瓣电平高的不足,致使发射波形在应用中易被截获且对弱目标检测性能较差。针对上述问题,在线性调频(linear frequency modulation,LFM)-Costas雷达波形中引入二相编码(binary phase shift keying,BPSK),设计了LFM-Costas-BPSK波形。一方面,降低了子脉冲间的相关性从而有效抑制了自相关旁瓣电平;另一方面,提高了波形复杂度,因而降低了被截获概率。仿真实验分析了关键参数对波形性能的影响,验证了所设计的LFM-Costas-BPSK波形的有效性。展开更多
In order to satisfy increasingly greater demand for the performance of communication systems, a throughput efficient wireless system based on the extended binary phase shift keying （EBPSK） modulation is presented. S...In order to satisfy increasingly greater demand for the performance of communication systems, a throughput efficient wireless system based on the extended binary phase shift keying （EBPSK） modulation is presented. Simultaneously, corresponding analysis of power spectra is also given with a brief process. The optimal waveform is proposed without useful information loss, by removing linear spectra presenting periodic components. On this basis, the reasonable definition of bandwidth is discussed, which indicates that the EBPSK belongs to the category of the ultra narrow band （UNB） throughput-efficient communication. Meanwhile, the modulation parameters＇ effects on bandwidth, transmission rate and transmission performance are analyzed. Results illustrate the validity of theoretical analysis and spectrum optimization. Results also prove that this UNB system can obtain good bit error rate （BER） performance with high spectra efficiency.展开更多
根据2PSK调制解调的原理,建立2PSK调制解调的数学模型。采用DDS(Direct Digital Synthesis直接数字频率合成)技术对调制解调中的载波信号进行设计。在此基础上,基于Matlab/Fdatool和DSP Builder搭建了实现2PSK调制解调的硬件电路仿真模...根据2PSK调制解调的原理,建立2PSK调制解调的数学模型。采用DDS(Direct Digital Synthesis直接数字频率合成)技术对调制解调中的载波信号进行设计。在此基础上,基于Matlab/Fdatool和DSP Builder搭建了实现2PSK调制解调的硬件电路仿真模型,并在Matlab和Modelsim中进行了仿真分析。仿真结果表明:本设计很好地实现了2PSK调制解调器的功能,简化了硬件电路,减少了编程时间。展开更多
文摘The objective of this research is to track the phase changes in Binary Phase Shift Keying (BPSK) modulated signal in ZigBee communication systems using discrete Kalman Filter (KF). Therefore, Kalman Filtering is used to estimate and optimize the carrier phase of BPSK modulated signal, in the presence of Additive White Gaussian Noise (AWGN) channel, by minimizing the phase deviation error. Therefore, a simulation model, using MATLAB, will be created to demonstrate ZigBee transmission system with the impact of the integrated filter. The expected results will show that Kalman Filter tracks the phase of BPSK modulated signal correctly and the performance of tracking will be measured by Mean Square Error (MSE) with respect to Signal to Noise Ratio (SNR). This study proposes a new method of phase tracking in ZigBee receivers in the presence of AWGN channel which can be extended to Internet of Things (IoT) applications.
基金The National Natural Science Foundation of China(No.60472054)the Natural Science Foundation of Jiangsu Province(No.BK2007103)
文摘In order to satisfy increasingly greater demand for the performance of communication systems, a throughput efficient wireless system based on the extended binary phase shift keying （EBPSK） modulation is presented. Simultaneously, corresponding analysis of power spectra is also given with a brief process. The optimal waveform is proposed without useful information loss, by removing linear spectra presenting periodic components. On this basis, the reasonable definition of bandwidth is discussed, which indicates that the EBPSK belongs to the category of the ultra narrow band （UNB） throughput-efficient communication. Meanwhile, the modulation parameters＇ effects on bandwidth, transmission rate and transmission performance are analyzed. Results illustrate the validity of theoretical analysis and spectrum optimization. Results also prove that this UNB system can obtain good bit error rate （BER） performance with high spectra efficiency.
文摘根据2PSK调制解调的原理,建立2PSK调制解调的数学模型。采用DDS(Direct Digital Synthesis直接数字频率合成)技术对调制解调中的载波信号进行设计。在此基础上,基于Matlab/Fdatool和DSP Builder搭建了实现2PSK调制解调的硬件电路仿真模型,并在Matlab和Modelsim中进行了仿真分析。仿真结果表明:本设计很好地实现了2PSK调制解调器的功能,简化了硬件电路,减少了编程时间。
