本文選題：跳頻序列 + 漢明相關(guān)�。� 參考：《西華大學(xué)》2017年碩士論文

【摘要】：隨著時(shí)代的進(jìn)步和科技的不斷發(fā)展,人們對(duì)通信的要求越來越高。跳頻多址擴(kuò)頻系統(tǒng)由于它的抗干擾性、安全性、多址性等眾多優(yōu)點(diǎn)被廣泛應(yīng)用于軍事電臺(tái)通信、移動(dòng)通信、現(xiàn)代雷達(dá)和聲納回聲定位系統(tǒng)等。通常情況下,在碼分多址環(huán)境中,我們希望發(fā)射機(jī)之間的相互干擾水平盡可能低。當(dāng)有兩個(gè)或多個(gè)發(fā)射機(jī)在同一個(gè)頻率點(diǎn)上同時(shí)傳輸信號(hào)時(shí)容易發(fā)生相互之間的干擾,而相互干擾的程度和所用的跳頻序列的漢明相關(guān)性緊密相連。因而,設(shè)計(jì)具有良好的漢明相關(guān)特性的跳頻序列是研究跳頻技術(shù)必不可少的內(nèi)容。2003年西南交大葉文霞和范平志等人首次提出低碰撞區(qū)/零碰撞區(qū)(Low Hit Zone/Zero Hit Zone,LHZ/NHZ)跳頻序列的概念,該概念被應(yīng)用于準(zhǔn)同步通信系統(tǒng),LHZ/NHZ跳頻序列的漢明相關(guān)值的大小對(duì)于準(zhǔn)同步通信系統(tǒng)抗多址干擾的能力具有重要意義。因此,LHZ/NHZ跳頻序列集的設(shè)計(jì)成為研究跳頻通信的重要內(nèi)容之一。在本文中我們基于交織技術(shù),給出了一類具有新參數(shù)的最優(yōu)低碰撞區(qū)跳頻序列集。對(duì)于給定的跳頻序列,通過改變基序列集和選擇適當(dāng)?shù)囊莆恍蛄屑梢詷?gòu)造出具有不同參數(shù)的低碰撞區(qū)跳頻序列集,新序列集關(guān)于LHZ/NHZ跳頻序列漢明相關(guān)理論界最優(yōu)。本文主要研究最優(yōu)低碰撞區(qū)跳頻序列集的設(shè)計(jì)。(1)分析了已有的跳頻序列集理論界各參數(shù)之間的約束關(guān)系。跳頻序列理論界主要包含以下參數(shù):頻隙集個(gè)數(shù)、跳頻序列的序列長度、跳頻序列的序列個(gè)數(shù)、跳頻序列的低碰撞區(qū)和漢明相關(guān)等,針對(duì)跳頻序列的常用理論界,包括常規(guī)跳頻序列最大漢明相關(guān)函數(shù)及其理論界,平均漢明相關(guān)函數(shù)及其理論界,部分漢明相關(guān)函數(shù)及其理論界和低碰撞區(qū)跳頻序列集最大漢明相關(guān)函數(shù)及其理論界,平均漢明相關(guān)函數(shù)及其理論界,部分漢明相關(guān)函數(shù)及其理論界,分析了在這些理論界限制的情況下參數(shù)間的約束關(guān)系。這些理論界的參數(shù)關(guān)系圖對(duì)跳頻序列的構(gòu)造提供了指導(dǎo)意義。(2)介紹了本文用于構(gòu)造跳頻序列的交織技術(shù)理論,研究和分析了基于交織技術(shù)構(gòu)造最優(yōu)低碰撞區(qū)跳頻序列集的方法,并給出了序列參數(shù)對(duì)比分析及性能分析。(3)研究了基于交織技術(shù)構(gòu)造最優(yōu)低碰撞區(qū)跳頻序列集的方法,通過研究分析前人所用到的交織技術(shù),提出了一種新的交織方式,并采用該方法得到了一類低碰撞區(qū)跳頻序列集,新序列集具有新的參數(shù)并關(guān)于周期漢明相關(guān)函數(shù)達(dá)到最優(yōu),另外給出了序列參數(shù)對(duì)比,構(gòu)造實(shí)例及性能分析。(4)對(duì)本文的工作進(jìn)行了總結(jié)并對(duì)未來工作予以展望。
[Abstract]:With the progress of the times and the continuous development of science and technology, the demand for communication is getting higher and higher. The frequency hopping multiple access spread spectrum system has been widely used in military radio communication, mobile communication, modern radar and sonar echo location system because of its anti-interference, security, multiple access and so on. In general, the system is in the code division multiple access environment. We hope that the level of mutual interference between transmitters is as low as possible. When two or more transmitters transmit signals at the same frequency point at the same time, it is easy to interfere with each other, and the degree of mutual interference is closely connected with the Hamming correlation of the frequency hopping sequence. Therefore, the design has good Hamming correlation. Frequency hopping sequence is an essential part of frequency hopping technology. The concept of Low Hit Zone/Zero Hit Zone (LHZ/NHZ) frequency hopping sequence is first proposed by Ye Wenxia and Fan Pingzhi in.2003 and zero collision zone (LHZ/NHZ) in Southwest Jiaotong University. This concept is applied to the quasi synchronous communication system. The magnitude of the Hamming value of the LHZ/ NHZ frequency hopping sequence is quasi identical. The ability of the step communication system to resist multiple access interference is of great significance. Therefore, the design of the LHZ/NHZ frequency hopping sequence set is one of the most important contents in the study of frequency hopping communication. In this paper, we give a class of optimal low collision zone frequency hopping sequences with new parameters based on interleaving technology. And the selection of appropriate shift sequence sets can construct a set of low collision frequency hopping sequences with different parameters. The new sequence set is the best for the LHZ/NHZ frequency hopping sequence. This paper mainly studies the design of the frequency hopping sequence set in the optimal low collision region. (1) the constraints of the existing parameters of the frequency hopping sequence set are analyzed. The theory of frequency hopping sequence mainly includes the following parameters: the number of frequency gap set, the sequence length of the frequency hopping sequence, the sequence number of frequency hopping sequence, the low collision region of the frequency hopping sequence and the correlation of Hamming, etc., for the frequency hopping sequence, including the maximum Hamming correlation function and its theoretical circle of the frequency hopping sequence, and the average Hamming correlation function and its theory The theorists, some hingling correlation functions and their theoretical circles and the largest Hamming correlation function and its theoretical circle, the average hingling correlation function and its theoretical circle, some Hamming correlation functions and their theoretical circles, analyze the constraint relations between the parameters in these theorists, and the parametric relation diagrams of these theorists. It provides guiding significance for the construction of frequency hopping sequence. (2) this paper introduces the interleaving technique theory used in the construction of frequency hopping sequence, studies and analyzes the method of constructing the optimal frequency hopping sequence set based on interleaving technology, and gives the comparison and analysis of sequence parameters and performance analysis. (3) the optimal low collision based on interleaving technology is studied. The method of frequency hopping sequence set, through the study and analysis of the interleaving technology used by predecessors, presents a new interleaving method, and uses this method to get a class of frequency hopping sequences of low collision regions. The new sequence sets have new parameters and the correlation function of the periodic Hamming is optimal. Furthermore, the comparison of the sequence parameters is given and an example is constructed. Performance analysis. (4) the work of this paper is summarized and future work is prospected.

【學(xué)位授予單位】：西華大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TN914.41

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