ID 原文 译文
22365 此外，扩展序列的随机选取会导致序列发生碰撞，为降低碰撞概率，该文利用星座图的增益指数特性，提出一类改进的复扩展序列。 In addition, the random selection of the spreading sequences will lead to the collision of the sequence. In order to reduce the collision probability, a set of improved complex spreading sequences based on constellation figure of merit is proposed.
22366 该文提出的改进复序列比 MUSA 使用的三元复序列具有更高的星座图增益指数，经过优选后，可以优选出数量更多的优良序列，在相同 BER 下与优选后的三元复序列相比，可以改善 1  d B 左右的性能，在 BER 为310−时，用户过载率可以提高 15%左右，进一步改善系统性能。 The proposed complex sequence has a higher constellation figure of merit than the triple-level complex spreading sequence. Additionally, more excellent spreading sequences can be obtained after optimization,  and when compared with the optimized triple-level  complex spreading sequence, the SNR performance can promote about 1 dB in the same BER and the user overloading ratio can improve 15% when BER is 310−, which can further promote the performance of MUSA system.
22367 针对卫星认知无线网络频谱感知不确定性较大导致传统频谱接入机制效率降低的问题，该文提出一种基于动态多频谱感知的信道接入优化策略。 In allusion to the low efficiency of traditional spectrum access strategies caused by high spectrum sensing uncertainty of satellite cognitive communication network, a novel  optimized channel access strategy based on dynamic multi-spectrum sensing is proposed.
22368 认知 LEO 卫星根据频谱检测概率与授权用户干扰门限之间的关系，实时调整不同频谱感知结果下的信道接入概率。 The cognitive LEO satellite could adjust the probability of channel access in time with different spectrum sensing results according to the relationship between spectrum detection probability and maximum interference threshold of primary user.
22369 在此基础上以系统吞吐量最大化为目标，设计了一种基于频谱检测概率和虚警概率联合优化的判决门限选取策略，并推导了最佳感知频谱数量。 In order to achieve the maximize throughput of cognitive system, a strategy for decision  threshold selection based on joint optimization between spectrum detection probability and false alarm probability is designed, and the optimized number of sensing spectrums is derived.
22370 仿真结果表明，认知用户能够在不大于授权用户最大干扰门限的前提下，根据授权信道空闲状态动态选择最佳频谱感知策略，且在检测信号信噪比较低时以更加积极的方式接入授权频谱，降低了频谱感知不确定性对信道接入效率的影响，提高了认知系统吞吐量。 Simulation results indicate that cognitive LEO satellite is able to select optimized spectrum  sensing strategy dynamically according to the idle states of primary channels with the interference limitation of primary user, and access primary channels more positively especially when the signal-to-noise ratio of detecting signals is low. The influence of  spectrum sensing uncertainty on the efficiency of channel access is depressed and the throughput of cognitive system is improved by the proposed channel access strategy.
22371 针对传统宽带数字接收机在接收宽带雷达信号时产生的跨信道问题，以及低截获概率(LPI)雷达信号脉内调制盲识别问题，该文提出一种基于调制宽带转换器(MWC)离散压缩采样的新型宽带数字接收机结构对宽带雷达信号进行截获和识别。 To solve the cross-channel signal problem when receiving wideband radar signals with the conventional wideband digital receiver, and the blind intra-pulse modulation recognition  problem for Low Probability of Intercept  (LPI) radar signals, a new wideband digital  receiver based on the Modulated Wideband Converter (MWC) discrete compressed sampling structure is proposed to intercept and recognize the wideband radar signals.
22372 该结构采用伪随机序列将接收信号混频至基带和其他子带内，经低通滤波、降速采样获得基带压缩采样信号，解决了跨信道信号问题； The proposed structure uses the pseudo-random sequences to mix the received signals to  baseband and other sub-bands, the mixed signals are then low-pass filtered and down-sampled to get the baseband compressed sampling data, which could solve the cross-channel signal problem flexibly.
22373 又提出一种基于短时傅里叶变换(STFT)和频谱能量聚焦率检验的识别算法。 Furthermore, a recognition method based on the Short-Time Fourier Transform (STFT) and the spectrum energy focusing rate test is proposed.
22374 首先检验 STFT 频谱带宽并进行调相和调频信号粗识别，然后检验压缩采样信号频谱能量聚焦率并进行具体的信号脉内调制识别。 Firstly, the STFT spectrum bandwidth is tested to distinguish phase modulation signals and frequency modulation signals recognition roughly. Then, the spectrum energy focusing  rate of the compressed sampling data is tested to recognize the intra-pulse modulation type specifically.