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- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- Also,802.11 maintained compatibility with the three most popular radio transmission types: direct sequence spread spectrum,frequency-hopping spread spectrum,and infrared. 802.;11也保持了与三种最流行的无线电传输方式（直接顺序扩频、跳频扩频和红外线）的兼容性。
- 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。
- An adaptive evolutionary algorithm (EA) based multiuser detector for direct sequence code division multiple access (DS-CDMA) systems is presented in this paper. 摘要提出了一种新的自适应演化算法，用来解决码分多址系统中的多用户检测问题。
- An efficient method that can blindly estimate and synchronize to PN sequence of direct sequence spread spectrum (DS-SS) signal quickly is presented in a non-cooperative context. 摘要在非协作信息侦测情况下，提出了一种实用的直接序列扩频(DS-SS)通信信号PN码序列的快速盲估计方法。
- 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。
- Abstract ：In this paper，A multicarrier signaling technique is applied to a direct-sequence CDMA system．A data sequence multiplied by a spreading sequence modulates multipte. 摘 要： 本文将多载波发送信号技术应用于直接序列扩频码分多址系统中．发射机中直接扩频序列与数据序列相乘，然后调制多个载波；
- The target DNA segment was amplified by polymerase chain reaction.The PCR products were either used for direct sequence or ligated to PCR II vector for sequence. 用PCR方法将靶目标DNA扩增后直接用于序列测定或连接到PCR II载体后进行序列测定。
- Also, 802.11 maintained compatibility with the three most popular radio tramiion types: direct sequence read ectrum, frequency-hoing read ectrum, and infrared. 802.;11也保持了与三种最流行的无线电传输方式（直接顺序扩频、跳频扩频和红外线）的兼容性。
- Also, 802.11 maintained compatibility with the three most popular radio transmission types: direct sequence spread spectrum, frequency-hopping spread spectrum, and infrared. 11也保持了与三种最流行的无线电传输方式（直接顺序扩频、跳频扩频和红外线）的兼容性。
- It is a necessary process to estimate the spread spectrum sequence for direct sequence spread spectrum (DSSS) signal for blind de-spreading in non-cooperative communications. 摘要在非协作条件下直接序列扩频(DSSS)信号的扩频序列估计是盲解扩的必需环节。
- The performance of hybrid spread spectrum communication systems is compared with those of the frequency hopped systems and direct sequence spread spectrum communication systems. 并且将混合扩频通信系统与跳频通信系统和直接序列扩频通信系统的性能进行了分析、比较。
