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- This paper proposes a method for narrowband interference suppression in Direct Sequence Spread System(DS-SS). 该文提出一种基于门限估计的直接序列扩频(DS-SS)通信系统窄带干扰变换域抑制方法。
- This paper introduces GMSK into Direct Sequence Spread Spectrum(DSSS) communication system in order to obtain good performance of power spectrum. 本文将GMSK调制引入到直接序列扩频通信系统中,以期获得更好的功率谱利用率。
- When the strong tone interference exists in the Direct Sequence Spread Spec-trum(DSSS) system, the traditional linear prediction filter performs poorly. 在很强的单音干扰存在时,传统的线性预测滤波方法不能达到很好的抗干扰性能。
- In direct sequence spread spectrum communication system, enemy is assumed to detect whole PN sequence chip by chip and a modulated retransmitted interference is created. 在直接序列扩频通信系统中,假设敌方能够逐个比特地检测到整个PN序列,并产生一个调制的转发干扰。
- We put forward a method which can easily be realized in DSP and direct sequence spread-spectrum system based on QPSK, it achieved a good performance in tests. 提出了易于在DSP以及QPSK的直接序列扩展频谱系统中实现的方法,并在测试中达到了较好的性能。
- Under the trend of future integration of WPAN, UWB system is the best solution undoubtedly. 对于未来整合化的无线个人区域网路的趋势之下，超宽频系统无疑的为一个最佳的解决方案。
- Especially, UWB system can assure high antiblocking performance as well as satisfy multi-user capability. 特别是它可以在满足多用户容量的同时保证有较高的抗阻塞性能。
- As PRF increases,the BER performance of this UWB system is much degraded under the conditions of fixed L and pulse shape. 当固定 L 和脉冲波形时,增大 PRF 将大大降低 UWB 系统 BER 性能。
- Direction of Arrival (DOA) estimation is one of the key technologies of Direct Sequence Ultra Wide Bandwidth (DS-UWB) system. 摘要到达角估计是直接序列超宽带系统的关键技术之一。
- The IC used in this Automatic Meter Reader System is a new product of Shanghai Fudan Microelectronics Co., Ltd.The basic theory for the IC is the Direct Sequence Spread Spectrum (DSSC) arithmetic. 本文中用到的通信芯片是本公司刚刚研发出的芯片，该芯片主要采取了直接序列扩频通信(DSSS)的算法。
- In this thesis, we design a novel coplanar waveguide-fed log-periodic slot antenna which possesses a very wideband performance and can be used in the UWB system. 在这篇论文中，我们使用共面波导馈入机制设计了一种对数周期开槽天线，它具有非常大的频宽，适合使用于超宽频的系统之中。
- Spread spectrum has two distinct flavors: direct sequence and frequency hopping. 该技术有两个明显的变型：直接顺序与跳频。
- A better method for direct sequence spread spectrum(DSSS) receiver to decrease the acquisition time is proposed. 提出一种减小直接序列扩频(DSSS)接收机信号捕获时间的改进方法。
- The MAT performances of the proposed scheme are then analyzed and compared with those of the conventional acquisition schemes via a simulation of a pulse-based time-hopping UWB system. 文中还对该算法的平均捕获时间进行了分析，并在基于脉冲体制的跳时超宽带系统仿真中将其与经典算法进行比较。
- Direct sequence code division multiple access( DS/ CDMA) as a technique for underwater acoustic networks is attracting attention from researchers. 直接序列码分多址(ds/DMA)一种受关注的水下声通信网多址接入方案。
- An algorithm for the suppression of narrowband interference in the direct sequence spread-spectrum (DSSS) systems is presented. 摘要提出了直接序列扩频通信系统中抑制窄带干扰的一种算法。
- Direct Sequence Spread Spectrum(DSSS)method is a major kind of anti-jamming technique which has been used extensively in communication fields. 直扩技术是一种在通信领域获得广泛应用的主要通信抗干扰技术。
- Modern UWB systems use various modulation techniques, including Orthogonal Frequency Division Multiplexing, to occupy these extremely wide bandwidths. 为了占据非常宽的带宽，现代的UWB技术使用不同的调制技术，其中包括正交频分多路复用。
- 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。
- The topic of this paper comes from the need of pricise carrier frequence measuring of Direct Sequence Spread Spectrum signal. 本论文课题来源于工程中要求对直接序列扩频信号载波频率进行精确测量的客观需求。
