| 引用本文: | 王雷,陈华明,唐小妹,等.北斗RDSS系统新体制信号子载波间干扰产生机理与消除方法.[J].国防科技大学学报,2019,41(3):13-17.[点击复制] |
| WANG Lei,CHEN Huaming,TANG Xiaomei,et al.Generation mechanism and mitigation method of jam between subcarriers of BDS RDSS signals of new modulation structure[J].Journal of National University of Defense Technology,2019,41(3):13-17[点击复制] |
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| 北斗RDSS系统新体制信号子载波间干扰产生机理与消除方法 |
| 王雷, 陈华明, 唐小妹, 李井源, 王飞雪 |
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(国防科技大学 电子科学学院， 湖南 长沙 410073)
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| 摘要: |
| 为提高新一代北斗无线电测定卫星服务在有限带宽内的信息服务容量，借鉴了正交频分复用的理念，新体制无线电测定卫星服务信号设计采用多个子载波进行信号调制。以往针对多用户的分析主要考虑多址干扰，对载波频偏损耗和伪码损耗单独考虑，这不能解释新体制调制在相同的同步头的情况下其他子载波上信号在当前观测子载波上形成较大相关峰的问题，该问题对信号接收产生较大干扰。本文对该问题产生机理进行了分析，并提出了两种相关干扰的消除方法。 |
| 关键词: 北斗无线电测定卫星服务 互相关 多子载波调制 载波频偏损 |
| DOI：10.11887/j.cn.201903003 |
| 投稿日期：2018-03-23 |
| 基金项目:国家自然科学基金资助项目（61601485） |
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| Generation mechanism and mitigation method of jam between subcarriers of BDS RDSS signals of new modulation structure |
| WANG Lei, CHEN Huaming, TANG Xiaomei, LI Jingyuan, WANG Feixue |
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(College of Electronic Science, National University of Defense Technology, Changsha 410073, China)
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| Abstract: |
| In order to increase the message volume in limited bandwidth for new generation BDS（BeiDou navigation satellite system） RDSS(radio determination satellite service), the signal was modulated on multi-subcarriers inferring to orthogonal frequency division multiplexing. Modulation on multi-subcarriers was rarely used in navigation systems. Corresponding analysis mainly focuses on multiple access affection, and loss caused by carrier frequency offset and code phase offset were analyzed separately. It is not considered that when using the same synchronization head, the signals on other subcarriers can cause high correlation peak for the observed subcarrier. This may affect the receiving of signals. The mechanism is analyzed and two correlation mitigation methods are supplied, which offers certain guidance for the design of the follow-up system. |
| Keywords: BeiDou navigation satellite system radio determination satellite service cross correlation multi-subcarrier modulation correlation loss of frequency bias |
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