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- In this paper, the characteristics of the spreading codes generated by AR filter in SESS are analyzed in detail. 该文详细分析了采用AR滤波方式产生的扩频序列的扩频特性。
- Therefore, the systems employing GO sequences as spreading codes can eliminate MI and MAI effectually. 因此，采用广义正交序列作为扩频码，可以有效消除多径干扰和多址接入干扰。
- The improved piecewise linear chaotic mapping is presented to generate the spreading codes for DS-CDMA system in this paper. 摘要本文提出用改进型分段线性混沌映射来产生DS-CDMA系统的直扩码；
- In direct sequence/code division multiple access (DS/CDMA) communication system, different users employ distinct spreading codes but transmit at the same time and frequency. 在直接序列扩频码分多址(DS/CDMA:direct sequence/code division multiple access)通信系统中，不同用户指定不同的扩频码波形，不同用户的信号在同一频带内同时传输。
- Specifically, the characteristics of the spreading codes also play an important part in the Self-Encoded Spread Spectrum (SESS) communication system. 在自编码扩频通信系统中，自编码扩频序列的特性对于自编码扩频系统的性能同样非常重要。
- Specifically,the characteristics of the spreading codes also play an important part in the Self-Encoded Spread Spectrum(SESS)communication system. 在自编码扩频通信系统中,自编码扩频序列的特性对于自编码扩频系统的性能同样非常重要。
- 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。
- An algorithm for fractionally spaced channel estimation of a synchronous CDMA system is proposed that uses aperiodic spreading code. 该文提出一种应用于非周期扩频的同步CDMA系统的下行信道的分数阶间隔信道估计的算法。
- In self-encoded spread spectrum (SESS) communication system,the spreading codes are generated based on the random data stream and are time-varying random codes. 在自编码扩频通信系统中,扩频码从随机数据流中产生,具有动态可变特性。
- CHU Zhenyong, YING Xiaofan, YI Kechu, TIAN Hongxin. The Study of a M-ary MC-CDMA System Based on Cyclic Spreading Codes &Pre-Equalization. Journal of Electronics (China), 2005, 22(3): 273-280. 褚振勇;应小凡;易克初;田红心，正交循环码M进制扩频接收机的研究，电子与信息学报;2005年第11期.
- The BOC(1,1) and its spread code correlation function figure were drawn by digital simulation,and the correlation function peaks were compared. 通过数字仿真得到了BOC(1;1)和扩频码的相关函数图;比较了二者相关函数的峰值.
- In the joint multiple access systems, which are based on the CDMA and SDMA techniques, the assignment of spreading codes should be based on the orthogonality of the spatial vector of the mobile users. 在基于码分多址(CDMA)和空分多址(SDMA)技术的联合多址系统中,扩频码的分配应根据移动用户空间向量的正交性来进行。
- So, finding a feeling spread code in people spread is not only the key of success of present spread in marketing but also a rethought of Chinese people culture characterizations. 因此找寻大众传媒中的情感传播密码不只是当代媒介在市场营销中的取胜之道,更是关乎中国大众传媒文化品格的一次反思。
- Considering the issue of the complexity, which means to use separate TF-domain re-ceiver, we prefer adopting VSL access scheme whether increasing spreading code as-signment on T-domain or F-domain. 若因考量硬体复杂度而采用分离时频率接收机，则使用可变展码长度存取技术将是较佳的方法。
- This method directly makes quadrature demodulation of the IF signal by utilizing the second-order sampling and sign-alternating,and then calculates the correlation value between the receiver signal and the local spreading code in analog domain. 该捕获方法采用二阶采样和符号交替实现中频信号的正交分解;再利用模拟匹配滤波器在模拟域计算接收信号与本地扩频码的相关值.
- In the CDMA wireless communications system , multi-access interference and near-far effect exist because spread codes between users are not completely orthogonal along with different users random accessing, regular filter can not overcome these questions. 码分多址系统中，不同用户的随机接入，使得用户之间扩频码不完全正交，进而产生了多址干扰(Multi-access interference，MAI)和远近效应(Near-far effect，NFE)等问题，常规的匹配滤波器无法克服这些问题。
- What can we do to prevent the disease spreading? 我们能做什么来防止这种疾病蔓延呢？
- The smoke from chimney is spreading out in the sky. 烟囱冒出的烟正在空中散开。
- The analytic formula for BOC(1,1) autocorrelation function was deduced,the position for peak values and zero values were shown. The correlation function values and acquisition were compared between BOC(1,1) and its spread code. 推导了BOC(1;1)相关函数的解析式;给出了相关函数中的零点位置和峰值位置;比较了BOC(1;1)和扩频码的相关函数数值及捕获.
- Moral taint has spread among young people. 道德的败坏在年轻人之间蔓延。
