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- noncoherent despreading 非相干解扩
- Such waves are said to be noncoherent. 这种波被称为非相干波。
- So it is necessary to search for efficient noncoherent reception methods. 因此有必要寻找有效的非相关接收方法。
- Borrowing unsupervised cluster analysis ideas, a novel method named K-means Clustering DeSpreading (KCDS) algorithm for tamed DSSS signals is proposed. 借鉴无监督聚类分析的思想,该文提出了一种基于聚类的软扩频信号盲解扩方法(KCDS)。
- Some methods to improve the system’s output SNR by coherent or noncoherent operating are also discussed. 最后讨论了用相干或非相干处理来改善系统输出信噪比的方法。
- The research of improving the performance of the noncoherent system is very important. 各式各样的时空编码方案已经被提出。
- The main aspects are devoted to coherent and noncoherent interactions of an optical field and atomic systems. 虽然整个课程主要采用半经典半量子理论,但也为研究生今后学习全量子理论设立了基础。
- To reduce the power dissipation and improve the operation speed, a new mixed analog-digital algorithm for despreading of QPSK modulated WCDMA signals is presented. 从降低解扩电路功耗和提高运算速度两方面考虑,针对采用QPSK调制的宽带码分多址(WCDMA)信号,提出了一种数模混合型解扩方法。
- In addition, the diversity order of the proposed code in the case of noncoherent detection was analyzed and derived. 进一步分析并推导了非相干检测下该编码的性能。
- Based on the estimated NBI eigen-waveforms and the PN sequences, NBIs can be rejected and the DS-SS signals despreading without the PN code can be realized too. 同时利用所估计的NBI特征波形可消除原始信号所夹杂的NBI,而利用所估计的PN码序列则可以对DS-SS信号实施盲解扩处理。
- Improving the property of noncoherent radar with polarization information is important in both theory and practice. 极化信息的利用对提高非相参雷达性能有重大的理论和实践意义。
- Blind despread of multi-sequence Direct Sequence Spread Spectrum signals (tamed DSSS signals) with unknown spreading codes are discussed in this paper. 该文研究的是在未知扩频序列的情况下,实现多序列直扩信号(也称软扩频信号)的解扩。
- Based on noncoherent DLL and arctan carrier PLL, the curves of tracking errors in general forms are given after a series of computing and simulation. 基于非相关早减迟延时锁定环和反正切载波跟踪环,得出了由一般形式的误差解析表达式导出的码相和载波相位跟踪误差曲线。
- The received signal is multiplied by the local sequence, and then the proposed scheme achieves the M-ary despread spectrum and OFDM demodulation at the same time. 在将基站接收信号分别与各用户原型扩频码镜像序列的OFDM调制结果相乘后,利用OFDM解调器可同时完成M元解扩和多载波解调。
- And finally this paper concludes coherent and noncoherent decoying are different theoretically while get the same effectiveness in practice. 同时,验证了相干诱偏和非相干诱偏的分法只有理论意义,在实际应用中两者的效果是基本一致的。
- To despread and demodulate the signal correctly in the spread spectrum system, the PN code phase of the receiver must be synchronized with that of the input signal precisely. 在扩频通信系统中,为正确解扩和解调接收到的扩频信号,接收机的PN序列相位和接收信号的PN序列相位必须完全同步;
- An Unscented Kalman Filter (UKF) based noncoherent detection method for Chaos-Shift-Keying (CSK) communication system is proposed in this paper. 基于UKF算法,该文提出一种CSK通信系统的非相干检测方法。
- Noncoherent integration of pulses, integration between, CFAR and clutter map CFAR of anti-sea clutter signal processing way is put forward. 提出了脉间非相干积累、扫描间积累、CFAR、杂波图CFAR等实现抗海杂波信号处理方法。
- Based on the principle of the general Delay-Locked Loop (DLL), an Noncoherent Delay-Locked Loop(NDLL) is analysed and prepared. 在一般延迟锁定环(DLL) 原理的基础上,分析并研制了一种非相干延迟锁定环(NDLL)。
- Here I develop the multi-sample demodulation for GFSK signal enlightened by the data-aided noncoherent demodulation of DPSK signal. 通过算法研究,在基于数据辅助的DPSK信号非相干解调算法的基础上,我们得到了GFSK信号的多比特解调法。
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