舰船电子工程
艦船電子工程
함선전자공정
SHIP ELECTRONIC ENGINEERING
2012年
9期
66-67,81
,共3页
扩展的二元相移键控%频域带限信号%带限信号相关性%误码率
擴展的二元相移鍵控%頻域帶限信號%帶限信號相關性%誤碼率
확전적이원상이건공%빈역대한신호%대한신호상관성%오마솔
extended binary phase key shifting%band limited signal%correlation%BER
随着通信系统的发展,频率资源严重不足与信息的高速可靠传输存在着日益突出的矛盾,因此高效频谱利用率的数据传输技术已成为当代通信系统追求的目标。超窄带通信技术是一种可以提供极高频谱利用率的技术,而扩展的二进制移相键控(EBPSK)正是一种重要的带通型超窄带调制技术,其采用跳变相位和跳变持续时间两个调制因素改变已调波形,是一种具有高能量利用率的新型超窄带调制技术。由于能量高度集中在中心频率周围,理论上可实现超窄带通信。研究了已调信号之间的相关性,并根据信号功率谱密度不同衰减所对应的信号衰减带宽,仿真了带限信号之间的相关系数和不同带限信号的误码率,分析了EBPSK带限信号波形样本的相关性以及误码性能。
隨著通信繫統的髮展,頻率資源嚴重不足與信息的高速可靠傳輸存在著日益突齣的矛盾,因此高效頻譜利用率的數據傳輸技術已成為噹代通信繫統追求的目標。超窄帶通信技術是一種可以提供極高頻譜利用率的技術,而擴展的二進製移相鍵控(EBPSK)正是一種重要的帶通型超窄帶調製技術,其採用跳變相位和跳變持續時間兩箇調製因素改變已調波形,是一種具有高能量利用率的新型超窄帶調製技術。由于能量高度集中在中心頻率週圍,理論上可實現超窄帶通信。研究瞭已調信號之間的相關性,併根據信號功率譜密度不同衰減所對應的信號衰減帶寬,倣真瞭帶限信號之間的相關繫數和不同帶限信號的誤碼率,分析瞭EBPSK帶限信號波形樣本的相關性以及誤碼性能。
수착통신계통적발전,빈솔자원엄중불족여신식적고속가고전수존재착일익돌출적모순,인차고효빈보이용솔적수거전수기술이성위당대통신계통추구적목표。초착대통신기술시일충가이제공겁고빈보이용솔적기술,이확전적이진제이상건공(EBPSK)정시일충중요적대통형초착대조제기술,기채용도변상위화도변지속시간량개조제인소개변이조파형,시일충구유고능량이용솔적신형초착대조제기술。유우능량고도집중재중심빈솔주위,이론상가실현초착대통신。연구료이조신호지간적상관성,병근거신호공솔보밀도불동쇠감소대응적신호쇠감대관,방진료대한신호지간적상관계수화불동대한신호적오마솔,분석료EBPSK대한신호파형양본적상관성이급오마성능。
With the development of communication system, the frequency resources of the wireless transmission system are increasingly scarce. It is much more necessary to study how to improve the frequency utilization efficiency. In order to improve the quality of communica lion and resolve the shortage of frequency resources, Ultra Narrow Bandwidth (UNB) is proposed as a new communication technology which can provide high spectrum efficiency. And Extended Binary Phase Key Shifting (EBPSK) is an important type of ultra narrow hand-pass modulation. EBPSK is proposed as a new modulation method, based on traditional Binary Phase Shift Keying (BPSK). In theory, EBPSK is a new ultra narrow band modulation with high energyefficiency. It has phase and transition duration, the two factors changing the modulated wave forrn. So that ultra narrow band communication with a high concentration of energy around the center frequency could be achieved. In this paper, the correlation of modulated signal without noise were studied, as well as the different attenuation bands of power spectrum density,corresponding to different bandwidth utilization. The correlation of modulated signal and BER performance were simulated and analyzed.