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射频原理

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77GHz毫米波汽车防撞雷达抗干扰射频编码方法

1 引言 

qichezidongjiashijishushi21 shijiqichejishufazhan qushi,yuji2030 nianjiangshixian25%dedaolucheliangzidongjiashi。 zidongjiashijishuyourengongzhineng、shijuejisuan、leida、jiankongzhuangzhi、gpsdengxitongjishurongheercheng,rangdiannao keyizaimeiyourenherenleizhudongdecaozuoxia,zidonganquandicaozuojidongcheliang,qizhongzuishouyaodejiushizhudonganquanfangzhuang gongnengshixian。 zaizidongjiashiqichejishuyanjinguochengzhong,zui xianchanyehuashixiandejiushiqichezhudonganquanfangzhuangyujingyuzhidong。

muqian,qichefangzhuangxitongjishufanganbaokuohaomiboleida、jiguangleida、hongwaixianleida、shexiangtoudeng。 weilaizidongjiashicheliangchuanganqibushurutu1suoshi。

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tu1 zidongjiashicheliangchuanganqibushutu 

狗万滚球app下载haomiboleidashouziranhuanjingyingxiangxiao,tancejulishi zhong,zaichezaileidalingyuxingjiabizuigao,danshinanyishibiexingren、jiaotongbiaozhideng;jiguangleidaceliangjingdujiaogao,keyongyu shishijianlikongjiansanweiditu,danshichengbengaoang,qiezaiyu、 xue、wutianxiaoguojiaocha;hongwaixianleidaceliangjingdujiaogao,ji shuchengshuqiechengbenjiaodi,danshiceliangjulijin(xiaoyu 10m),jidadixianzhileqiyingyongchangjing;shexiangtouchengbendi, nenggouduiwutijinxingshibie,shichedaopianliyujing、jiaotongbiaozhi shibiedenggongnengbibukeshaodechuanganqi,danjuyouyilaiguangxian、 zaiyejianhejiduantianqixiahuishixiao、nanyijingquecejudengquedian。 yinci,geleijishufanganzaiceliangjuli、jingzhunduheshi yinghuanjingdengfangmiangeyouyoulie。 dangqiangeleifuzhujiashi/wu renjiashijiejuefanganzhongjibencaiyongduochuanganqironghedejiejue fangan,danwulunnazhongfangan,haomibofangzhuangleidadoujuyouzhong yaodiwei。 muqianzuibeiyeneirentongdejiushishipinfenbianhe 77ghzchezaihaomibofangzhuangleidarongheshixianzhudonganquanfang pengzhuanggongneng。 yinweishipinfenbiangongnengshouyuwutianqi、xuanguang、 yejiandengdikeshinengjianduyingxiangbunengshixianquantianhouzuoye, gugaojingdu、gaoxingjiabidehaomiboleidachengweidangqianshixian zhudonganquanfangzhuangdebixucuoshi。

狗万滚球app下载2018niangongxinbu、anjianweilianhefawen(111 hao)zhi daoxingyijianduikeyun、lvyun、huoyuncheliangjichulechelianganzhuang zhudonganquanyujingfangzhuangxitongdejianyi,suoshejicheliang2000 wanliang,suizheshehuiquntiduizhudonganquanyujingfangzhuangderenzhitisheng,gengduodeshehuicheliangjianghuianzhuangxiangguanchanpin,yujidao2025nian,zhongguochezaihaomiboleidadechuhuoliangkeda1000 wanjian。 

2 防撞雷达相互干扰问题的严重性 

狗万滚球app下载dangqianshimianshangdeleidaduozhongduoyang,anzhaoleidapinlv qufenyouduanboleida、chaoduanboleida、weiboleida、haomibo leidadeng;anzhaogongnengfenyouzhidaoleida、yujingleida、sousuo leida、qixiangleidadeng;anzhaoanzhuangpingtaiqufenyoujizailei da、danzaileida、xingzaileida、chezaileida、jianzaileidadeng。 suoyoudeleida,gengduodeguanxinleidabenshendekangganraowenti,buhuiquguanxinleidaganraobierendewenti,zhiyouqichefangzhuangleidahuiguanxinleidaduileidadeganraowenti,yinwei zhiyouqichefangzhuangleidashigexingleidazhonganzhuangliangzuida,shiyongmianzuiguang,fugairenqunzuiduodeleida,zuiyoukenengxianghuganraodeleida。 

狗万滚球app下载suizhe77ghzhaomiboqichefangzhuangleidadedafanweishiyong,suizhierlaijiushileidajianxianghuganraowenti。 dangqianzhuliuleidatanceguangjiaowei30du~40du,tancejuli160 mi~200mi,zaixiangduierxingdechedaoshangleidajianghuichuxianhuxiangganraoqingxing,rutu2suoshi。

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狗万滚球app下载tu2 xiangxiangchedaoleidaganraoshiyitu 

leidajianxianghuganraoshihuiyinqimubiaowupan,daozhiche liangcaiqucuowudechachedongzuo,ruguowentijiejuebuhaojianghuiduishehuigonggonganquandailaijudadeweixie,shejidaominshenganquandewenti,doubushixiaowenti,bixuyuyizhongshi。 

3 利用射频编码解决雷达干扰问题  

狗万滚球app下载77ghaomiboleidajuncaiyongkuaisaodiaozhifangshi,yizufa shemaichongyouruogangesaomiaozhouqi(tchirp)zucheng,meigezhouqide junsaomiaoxiangtongdedaikuan,yibanweijishizhaohezidaoliangbaiduozhao hezibudeng,zhouqigeshuchangjiandewei128、256he512。

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77ghaomiboleidadaduojubeimimogongneng,weile shixianmimo,muqianshichangshangdehaomiboshepinxinpianjunju youduifashexinhaojinxingerxiangdiaozhidegongneng,nenggouduimeige chirpzhouqijinxing0,πdiaozhi。 diaozhixiangweiwei0dezhouqi,fashexinhaobiaoshiwei:

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狗万滚球app下载diaozhixiangweiweiπdezhouqi,fashexinhaobiaoshiwei: 

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S1()=-S2(),两个周期的信号刚好相反。 

womenkeyiliyonghaomiboshepinxinpiandezheiyisheji, zaifasheshiduimeigezhouqidexiangweijinxingerxiangbianma,zaijieshoushianzhaoyizhideguizeduixinhaojiema,yicilaidadaoyizhiganraodemude。 jutizuofarutu4suoshi。

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tu4 fashejieshouhuilushiyitu 

狗万滚球app下载shouxianchanshengyizuweisuijierxiangma,duimeige chirp zhouqijinxing0,πdiaozhi,rutu5suoshi。

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tu5 erxiangmadiaozhishiyitu

狗万滚球app下载 ranhouzaijieshoudeshihouanzhaofashedediaozhiguizeduimei gechirpzhouqijinxingjiediao,jiediaoleyihouzaijinxinghouxu deerweiffthecfarjiancedengchangguichuli。 

狗万滚球app下载yimou77gleidaweili,saopindaikuanwei200mhz,yi zufashebaohan512gechirpzhouqi,jiediaohouzuoerweifftchulijieguorutu6suoshi,keyikanchu,mubiaoduiyingdejuli -duopuledanyuancunzaimingxiandefengzhi,keyihenrongyidijiangmubiaojiancedao,bingjinyibuceliangchumubiaodejulihesudu。

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狗万滚球app下载tu6mubiaohuiboerweifftchulijieguotu 

狗万滚球app下载mubiaosuozaijulidanyuandeduopulepurutu7 suoshi, keyikandaoyumubiaosududuiyingdeduopulepinlvchuyoumingxiandefengzhishuchu。

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狗万滚球app下载tu7 mubiaohuiboduopulejieguotu 

狗万滚球app下载jiashehuiboxinhaobianweiganraoxinhao,tadenengliangyumubiaohuibonengliangxiangtong,danshidiaozhimayufashexinhaobutongshi, jiediaohouzuoerweifftchulijieguorutu8 suoshi。 keyikanchu,ganraoxinhaodehuibozuoffthouhuizaiduiyingdejulidanyuanchuxianyigetiaodai。

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tu8 ganraoxinhaofftchulijieguotu


duiyingjulidanyuandeduopulepurutu9 suoshi,keyikandaoganraoxinhaodeduopulepubei“zaoshenghua“,meiyoumingxiandefengzhichuxian,fuduyebimubiaoxinhaojiangdi27db。

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狗万滚球app下载tu9 ganraoxinhaoduopulehuibojieguotu 

狗万滚球app下载yincidanghuiboxinhaozhongcunzaiganraoxinhaoshi,cunzailiang zhongxiaoguo:ruguofudubushitebieda,jingguojiediaochulihou, fudujiangdile27db,diyuzaoshengmenxian,ganraoxinhaobuhuibeijiancechulai;ruguofuduhenda,fudujiangdile27dbrengranchaoguolezaoshengmenxian,danshiyouyumeiyoumingxiandefengzhi,caiyongcfarjiancehouyiranbuhuibeipandingweimubiao。 zheiyang, caiyongleshepinbianjiemahou,ganraonenggoubeiyouxiaodiyizhi,jianshaowupan。 youyumuqianshichangshangde77g shepinxinpianjunjubeifa sheerxiangmadiaozhidegongneng,erjiediaoshizhixuyaoduixiangyingzhou qideshujufanxiang,yincicaiyongshepinbianmadefangshijinxingkang ganraozaishixiandeshihoubuxuyaoewaizengjiaqijianyebuhuixiao haoewaidechulishijian,duixianyouleidadeyingjianjiagouheruanjianjiagoumeiyouyingxiang。

4 射频编码规则 

狗万滚球app下载benwenjiejianjinrongxingyeshujuchuanshuguifan,erxiangbianmajichushangzengjialehaomiboleidazaibomacxiaoyanbianmaguize。 shedingguizewei:zaibobianmaziduanyou24 gezijiezucheng,ji:matou(4zijie)+bianmaxuhao(16zijie)+mawei (4zijie)+mac(8zijie)。 matoukeyongyudingyiziduandeyongtu,ru01biaoshifangzhuangyujing、02biaoshitongxun、03biaoshiguzhang、00biaoshiqiujiudeng。 16gezijiedebianmaxuhaokeyongyujiluleidachanpinxuliehao,qizhong4 weibiaoshileidachangjia,12 weibiaoshixuliehao。

maweikeyizuobeifenyong,suizheleidayingyongpuji,leidakeyibujinzuoweileidashiyong,kezuokuozhanshiyong,biruyingyongyujiaotongguankong、anfanggenzongdengdeng。 

狗万滚球app下载maczijiejixiaoyanmazijie,leidajieshouhuiboxinhaoshitongguojieximaczijiepanduanhuiboxinhaoshifouweibenche fashechanshengdehuiboxinhao。 xiaoyanmajiangzaiboquanbubianmaziduancaiqudesjiami,desjiamisuanfaxiangduiqitachangyongjiamisuanfaruaes、rsa/ecc、diffie-hellman、sha -1/sha-256zhanyongecuziyuanzuishao,nengdadaoyouxiaoxiaoyanzaibobianmamude。 

youyuchezaifangzhuangleidadexiangyingshijianweihaomiaoji(xiao yu60haomiao),gubunengjileidaecudailaichaoefudan, bianmaziduanzongzhangduruguodadao24 zijie,jingzuozhecaiyong 5775ecuxinpianjinxingyanzheng,cesuanecuxinpianyunsuanchuli shijianzengjiale5haomiao,keweixitongjieshou。 

macleidazaibobianmaguizehaochuzaiyuzhanyongxitongziyuanshao,yiyushixian;bijiaoweisuijimaxuliezengjialeyoudingyidemazhi,zaibobianmabujinkeyongyuleidafangzhuangkangganrao, haikeyiweijianglaixitongshengjihekuozhanyingyongtigongzhicheng,bi ruwulianwangtongxin、anquanjijiudeng。 

5 结束语 

zongshangsuoshu,haomiboqichefangzhuangleidacaiyongshepinbianmafangfakeyouxiaojiejueleidajianxinhaoganraowenti,tongshiweijianglaixitongshengjiyubeileshengjikongjian,weigengguangkuodewulianwangqichedianziyingyongdahaojichu。