ID 原文 译文
21355 针对差分混沌移位键控(DCSK)传输速率低的问题，该文提出一种基于希尔伯特变换的多用户DCSK(HMU-DCSK)通信系统。 A multiuser Differential Chaos Shift Keying (DCSK) communication system based on Hilbert transform is proposed (HMU-DCSK), to solve the problem of low transmission rate of DCSK.
21356 在固定阶数的Walsh码条件下，通过希尔伯特变换将正交基信号集合提高1倍，并确保分配给每个用户的载波信号正交。 Under the condition of fixed-order Walsh codes, the set of orthogonally-based signals is doubled by the Hilbert transform and the carrier signals assigned to each user are guaranteed to be orthogonal.
21357 推导了在Rayleigh衰落信道下的误码率公式并进行仿真。 The Bit-Error-Rate (BER) formula in Rayleigh fading channel is derived and numerous simulations are conducted.
21358 结果表明，相同N值下HMU-DCSK系统的传输速率是传统多用户DCSK系统的2倍；相同传输速率下HMU-DCSK系统的误码性能明显优于传统多用户DCSK系统。 The simulation results show that the transmission rate of HMU-DCSK system is twice that of traditional multiuser DCSK system under the same N value, meanwhile, the BER performance of HMU-DCSK system is obviously better than the traditional multi-user DCSK system under the same transmission rate.
21359 机载双基雷达杂波与构型有关且具有严重的距离依赖性，因此杂波脊复杂多变，独立同分布(IID)的样本很少。 Clutter of airborne bistatic radar is related to configuration and has serious range dependence characteristic, therefore the clutter ridge is complex and variable, and few Independent and Identically Distributed (IID) samples exist.
21360 传统的空时自适应处理(STAP)方法受独立同分布样本数的限制，对机载双基雷达杂波的抑制性能有限。 As the result, the traditional Space-Time Adaptive Processing (STAP) has a degraded suppression performance for airborne bistatic radar clutter.
21361 基于机载雷达杂波在角度-多普勒域分布的稀疏特性和稀疏贝叶斯学习(SBL)在稀疏信号重建方面的优势，该文将SBL算法应用于较为复杂的机载双基雷达双动模式下杂波抑制，该方法可以用少量训练单元杂波估计待测距离单元的杂波协方差矩阵(CCM)，然后进行空时自适应处理； Based on the sparsity of airborne radar clutter in the angle-Doppler domain and the advantages of Sparse Bayesian Learning (SBL) in sparse signal reconstruction, SBL algorithm is applied to the more complex airborne bistatic radar with both transmitter and receiver moving. The method can estimate the Clutter Covariance Matrix (CCM) of the unit under test with very few training samples, then perform space-time adaptive processing.
21362 同时，该算法不需要样本独立同分布，在双基双动模式下对杂波的抑制性能较好，仿真结果验证了算法的有效性。 Since the method does not need independent and identically distributed samples, it has better performance of clutter suppression in the airborne bistatic radar with both transmitter and receiver moving. Simulation results verify the effectiveness of the algorithm.
21363 针对色噪声背景下的未知线谱信号估计问题，该文提出一种基于分子频带处理的稀疏重构类线谱估计方法。 To solve the problem of the line spectrum estimation under colored noise background, a subband line spectrum estimation method using sparse reconstruction is proposed.
21364 首先，利用多速率余弦调制滤波器组对观测信号进行子带分解，得到功率谱相对平坦的子带信号。 Firstly, the input signal is divided into several subbands by a multi-rate cosine modulated filter bank. The subband signal has the flatter power spectrum.