CN115001558B - 一种基于w码实时估计的gps的p码信号再生转发方法 - Google Patents
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- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
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- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
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Abstract
Description
技术领域
本发明涉及卫星导航技术领域,更具体地说,特别涉及一种基于W码实时估计的GPS的P码信号再生转发方法。
背景技术
随着卫星导航在军事装备中的广泛应用,导航战已成为军事对抗的重要组成部分。为了使敌方导航接收机失效或异常,通常会使用压制干扰或灵巧干扰等对抗策略。
压制干扰策略是直接播发大功率干扰信号,使卫星信号完全被强功率干扰所压制,从而导致敌方接收机无法正常接收。该策略简单、可靠、有效,但是目前军用导航接收机普遍采用阵列抗干扰技术,具有很强的抗干扰能力。为了使敌方接收机失效,需要使用大功率的干扰源。较高的发射功率不仅会导致干扰源体积庞大降低其机动性,还容易暴露自身位置,极大限制了压制干扰源在强对抗条件下的生存能力。灵巧干扰策略是播发与真实卫星信号具有相同伪码和电文的虚假导航信号,使敌方接收机跟踪在虚假信号上,从而输出错误的位置信息。在灵巧干扰策略中,如果仅是为了干扰敌方接收机工作,那么播发多颗卫星的虚假信号即可使敌方接收机难以剔除虚假卫星信号。如果要达到诱骗接收机的目的,则需要根据敌方接收机的位置实时调整虚假信号的轨迹。由于灵巧干扰策略不需要播发大功率信号,因此相比压制干扰策略具有更强的战场生存能力。
实施灵巧干扰的关键在于如何产生虚假的导航信号。对于民用信号而言,由于信号格式是完全公开的,因此可以按照需要产生任意时延的虚假信号。但是军用信号使用非公开的无周期长码,这就导致目前几乎所有的欺骗系统均是仅对民用接收机有效。在无法直接生成军码的情况下,只能通过采用转发真实卫星信号的方式产生虚假信号。为了使敌方接收机能够跟踪在虚假信号上,虚假信号要有比真实信号更高的载噪比。
传统GPS的P码信号转发再生方法是使用数字多波束阵列天线对可视卫星进行高增益数字处理,并根据欺骗轨迹调整数字信号的时延和多普勒频率,最后将各卫星信号经数字合路后转成模拟信号,具体的实现框图如图1所示。
由于数字多波束处理后的各卫星信号中仍然含有噪声,因此在多通道合路的过程中会进一步放大噪声,这就导致为了使再生信号相比真实信号具有更高的载噪比,阵列天线必须要求较高的增益。由于数字多波束处理后的各卫星信号中仍然含有噪声,因此在多通道合路的过程中会进一步放大噪声,这就导致为了使再生信号相比真实信号具有更高的载噪比,阵列天线必须要求较高的增益,使得欺骗系统难以实现便携化。
假设转发的卫星数量为12,并且要求再生信号的载噪比比真实信号载噪比高5dB,则阵列天线的处理增益必须不小于16dB。接收增益取决于数字多波束阵列天线的阵元数,直接决定了灵巧干扰系统的成本和体积。如果按照0.6的效率来计算,阵列天线要实现16dB的增益需要约66阵元,如此多的阵元数导致整个干扰系统具有很高的成本,并且难以实现较高的机动性能,极大限制了其在战场中的应用。
综上所述,为了实现GPS的P码欺骗干扰系统的便携化,必须要能够在接收天线增益较低的情况下,实现卫星信号的高增益再生转发。
发明内容
本发明的目的在于提供一种基于W码实时估计的GPS的P码信号再生转发方法,以克服现有技术所存在的缺陷。
为了达到上述目的,本发明采用的技术方案如下:
一种基于W码实时估计的GPS的P码信号再生转发方法,包括以下步骤:
S1、采用阵元数不小于7的阵列天线接收卫星信号,采用数字多波束方法对所有可视的GPS卫星进行高增益接收;
S8、重复步骤S1-S7得到其他卫星的基带信号;
S9、将N颗卫星的基带信号进行数字合路;
S10、将合路后的数字信号调制射频并经过发射天线播发。
进一步地,所述步骤S7中生成卫星i无噪声的L1频点的基带信号,其表达式为:
与现有技术相比,本发明的优点在于:本发明提供的一种基于W码实时估计的GPS的P码信号再生转发方法,能够将GPS的P码欺骗系统所要求的阵列天线阵元数由66降至7,大幅降低系统的体积和功耗,实现装备的便携化。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案,下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍,显而易见地,下面描述中的附图仅仅是本发明的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图获得其他的附图。
图1是现有技术的实现原理图。
图2是本发明基于W码实时估计的GPS的P码信号再生转发方法的实现原理图。
具体实施方式
下面结合附图对本发明的优选实施例进行详细阐述,以使本发明的优点和特征能更易于被本领域技术人员理解,从而对本发明的保护范围做出更为清楚明确的界定。
参阅图2所示,本实施例公开了一种基于W码实时估计的GPS的P码信号再生转发方法,包括以下步骤:
步骤S1、采用阵元数不小于7的阵列天线接收卫星信号,采用传统的数字多波束方法对所有可视的GPS卫星进行高增益接收。
步骤S8、重复步骤S1-S7得到其他卫星的基带信号。
步骤S9、将N颗卫星的基带信号进行数字合路,表达式为:
步骤S10、按照传统方法将合路后的数字信号调制射频,并经过发射天线播发。
本发明利用GPS的P 码信号中加密的W码符号速率较低的特点对W码进行估计,并使用估计出的W码按照给定的时延和多普勒频率生成完全不含噪声的再生信号。在这种情况下,转发信号载噪比主要取决于W码估计的误码率。当接收天线的增益满足一定要求时,W码误码率所引入的载噪比损耗较低,可以保证再生转发信号的载噪比高于真实卫星信号的载噪比。
本发明能够在7阵元的情况下实现12路GPS的P码的再生转发,并且保证转发信号载噪比至少比真实信号高5dB。
虽然结合附图描述了本发明的实施方式,但是专利所有者可以在所附权利要求的范围之内做出各种变形或修改,只要不超过本发明的权利要求所描述的保护范围,都应当在本发明的保护范围之内。
Claims (6)
1.一种基于W码实时估计的GPS的P码信号再生转发方法,其特征在于,包括以下步骤:
S1、采用阵元数不小于7的阵列天线接收卫星信号,采用数字多波束方法对所有可视的GPS卫星进行高增益接收;
S7、外部根据欺骗轨迹设置卫星信号的功率、、时延和多普勒频率,并使用步骤S6得到的W码码片估计值步骤S3得到的电文估计值、C/A码和P码的扩频码c0、c1、以及载波初相值生成卫星i无噪声的L1频点的基带信号;
S8、重复步骤S1-S7得到其他卫星的基带信号;
S9、将N颗卫星的基带信号进行数字合路;
S10、将合路后的数字信号调制射频并经过发射天线播发。
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Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6784830B1 (en) * | 2002-04-16 | 2004-08-31 | Integrinautics Corporation | Method for processing in dual frequency civilian GPS receiver |
CN101710180A (zh) * | 2009-11-09 | 2010-05-19 | 上海华测导航技术有限公司 | 实现双频gps卫星信号接收机的基带电路结构及其方法 |
CN102116866A (zh) * | 2009-12-31 | 2011-07-06 | 和芯星通科技(北京)有限公司 | 整周载波的gps p和/或y码信号的跟踪方法和装置 |
CN106597490A (zh) * | 2016-12-15 | 2017-04-26 | 中国电子科技集团公司第二十研究所 | 一种双频gps接收机l1辅助l2p(y)跟踪的方法 |
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Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6784830B1 (en) * | 2002-04-16 | 2004-08-31 | Integrinautics Corporation | Method for processing in dual frequency civilian GPS receiver |
CN101710180A (zh) * | 2009-11-09 | 2010-05-19 | 上海华测导航技术有限公司 | 实现双频gps卫星信号接收机的基带电路结构及其方法 |
CN102116866A (zh) * | 2009-12-31 | 2011-07-06 | 和芯星通科技(北京)有限公司 | 整周载波的gps p和/或y码信号的跟踪方法和装置 |
CN106597490A (zh) * | 2016-12-15 | 2017-04-26 | 中国电子科技集团公司第二十研究所 | 一种双频gps接收机l1辅助l2p(y)跟踪的方法 |
Non-Patent Citations (1)
Title |
---|
GNSS智能相干跟踪欺骗干扰方法及效能分析研究;张佩华等;《现代导航》;20180615(第03期);11-19 * |
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Application publication date: 20220902 Assignee: Hunan Guoyu Satellite Technology Co.,Ltd. Assignor: HUNAN OVERPASS BRIDGE AEROSPACE TECHNOLOGY CO.,LTD. Contract record no.: X2024980004194 Denomination of invention: A GPS P-code signal regeneration and forwarding method based on real-time estimation of W-code Granted publication date: 20221115 License type: Common License Record date: 20240412 |
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