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- Spread spectrum has two distinct flavors: direct sequence and frequency hopping. 該技術(shù)有兩個(gè)明顯的變型：直接順序與跳頻。
- A better method for direct sequence spread spectrum(DSSS) receiver to decrease the acquisition time is proposed. 提出一種減小直接序列擴頻(DSSS)接收機信號捕獲時(shí)間的改進(jìn)方法。
- This paper proposes a method for narrowband interference suppression in Direct Sequence Spread System(DS-SS). 該文提出一種基于門(mén)限估計的直接序列擴頻(DS-SS)通信系統窄帶干擾變換域抑制方法。
- Direct sequence code division multiple access( DS/ CDMA) as a technique for underwater acoustic networks is attracting attention from researchers. 直接序列碼分多址(ds/DMA)一種受關(guān)注的水下聲通信網(wǎng)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. 本文將GMSK調制引入到直接序列擴頻通信系統中,以期獲得更好的功率譜利用率。
- 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擴頻通信系統中抑制窄帶干擾的一種算法。
- Direct Sequence Spread Spectrum(DSSS)method is a major kind of anti-jamming technique which has been used extensively in communication fields. 直擴技術(shù)是一種在通信領(lǐng)域獲得廣泛應用的主要通信抗干擾技術(shù)。
- Blind despread of multi-sequence Direct Sequence Spread Spectrum signals (tamed DSSS signals) with unknown spreading codes are discussed in this paper. 該文研究的是在未知擴頻序列的情況下，實(shí)現多序列直擴信號(也稱(chēng)軟擴頻信號)的解擴。
- The topic of this paper comes from the need of pricise carrier frequence measuring of Direct Sequence Spread Spectrum signal. 本論文課題來(lái)源于工程中要求對直接序列擴頻信號載波頻率進(jìn)行精確測量的客觀(guān)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也保持了與三種最流行的無(wú)線(xiàn)電傳輸方式（直接順序擴頻、跳頻擴頻和紅外線(xiàn)）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. 在很強的單音干擾存在時(shí),傳統的線(xiàn)性預測濾波方法不能達到很好的抗干擾性能。
- An adaptive evolutionary algorithm (EA) based multiuser detector for direct sequence code division multiple access (DS-CDMA) systems is presented in this paper. 摘要提出了一種新的自適應演化算法，用來(lái)解決碼分多址系統中的多用戶(hù)檢測問(wèn)題。
- 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. 摘要在非協(xié)作信息偵測情況下，提出了一種實(shí)用的直接序列擴頻(DS-SS)通信信號PN碼序列的快速盲估計方法。
- 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. 在直接序列擴頻通信系統中,假設敵方能夠逐個(gè)比特地檢測到整個(gè)PN序列,并產(chǎn)生一個(gè)調制的轉發(fā)干擾。
- 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： 本文將多載波發(fā)送信號技術(shù)應用于直接序列擴頻碼分多址系統中．發(fā)射機中直接擴頻序列與數據序列相乘，然后調制多個(gè)載波；
- 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方法將靶目標DNA擴增后直接用于序列測定或連接到PCR II載體后進(jìn)行序列測定。
- 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也保持了與三種最流行的無(wú)線(xiàn)電傳輸方式（直接順序擴頻、跳頻擴頻和紅外線(xiàn)）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也保持了與三種最流行的無(wú)線(xiàn)電傳輸方式（直接順序擴頻、跳頻擴頻和紅外線(xiàn)）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. 摘要在非協(xié)作條件下直接序列擴頻(DSSS)信號的擴頻序列估計是盲解擴的必需環(huán)節。
- The performance of hybrid spread spectrum communication systems is compared with those of the frequency hopped systems and direct sequence spread spectrum communication systems. 并且將混合擴頻通信系統與跳頻通信系統和直接序列擴頻通信系統的性能進(jìn)行了分析、比較。
