Abstract: Wannan shafin yana gabatar da halayen aikace-aikace da fa'idodin fasahar COFDM a watsa mara waya, da wuraren aikace-aikacen fasaha.
Mahimman kalmomi: ba layi-na-ganin ba;Anti-tsangwama;Matsar da babban gudun; COFDM
1. Wadanne fasahohin watsa mara waya ne gama gari?
Tsarin fasaha da aka yi amfani da shi a watsa mara waya za a iya raba shi da shi zuwa watsawar analog, watsa bayanai / rediyon Intanet, GSM / GPRS CDMA, microwave dijital (mafi yawa yada bakan microwave), WLAN (cibiyar sadarwa mara waya), COFDM (orthogonal mita division multiplexing), da dai sauransu. Daga cikin su, fasahohin gargajiya ba za su iya cimma nasarar watsa babban saurin watsa shirye-shiryen watsa shirye-shirye ba a karkashin "katange, yanayin wayar hannu mara gani da sauri", tare da haɓakawa da haɓakar fasahar OFDM, wannan matsala tana da mafita.
2. Menene fasahar COFDM?
COFDM (coded orthogonal mita division multiplexing), wato codeing orthogonal mita division multiplexing, ban da ikon coding kuskure aikin gyara, da babbar alama shi ne Multi-Dauke Modulation, wanda ya raba da wani tashar zuwa da yawa orthogonal sub-tashoshi a cikin. mita, yana amfani da mai ɗaukar kaya guda ɗaya akan kowane tashar tashar, kuma yana lalata bayanan zuwa rafukan da yawa, yana lalata ƙimar kwararar bayanai, waɗannan ƙananan rafukan bayanan ana amfani da su don daidaita kowane mai ɗaukar hoto daban.
Daidaitaccen watsawa na kowane mai ɗaukar kaya yana rage dogaro ga mai ɗaukar kaya guda ɗaya, kuma ƙarfin faɗuwa na anti-multipath, ikon tsoma bakin intercode (ISI), da juriya na motsi na Doppler suna inganta sosai.
Yin amfani da fasaha na COFDM na iya gaske gane watsa shirye-shiryen watsa shirye-shirye mai sauri a ƙarƙashin toshewa, yanayin wayar hannu mara gani da sauri, wanda a halin yanzu shine mafi ci gaba kuma mafi kyawun fasahar daidaitawa a duniya.
3. Menene fa'idodin fasahar COFDM a watsawa mara waya?
Watsawa mara igiyar waya yana tafiya ta matakai biyu: watsawar analog da dijital.An kawar da watsawar hoton analog a cikin masana'antu da yawa saboda kutse da kutsewar tashoshi da ƙarar amo, yana haifar da mummunan tasiri a aikace-aikace masu amfani.
Tare da balagaggen fasahar OFDM da abubuwan haɗin gwiwa, samfuran da ke amfani da fasahar COFDM sun zama mafi haɓaka kayan watsa mara waya.Amfaninsa sune kamar haka:
1, Ya dace da aikace-aikace a Babu-line-na-ganin da kuma toshe muhallin kamar birane yankunan, kewayen birni, da gine-gine, da kuma nuna m "diffraction da shigar azzakari cikin farji" iyawa.
COFDM mara waya image kayan aiki yana da abũbuwan amfãni daga "ba-line-na-gani" da kuma "diffraction" watsa saboda da Multi-danko da sauran fasaha halaye, A cikin birane yankunan, duwatsu, ciki da kuma waje gine-gine da sauran wuraren da ba za a iya gani. da kuma toshe, na'urar na iya samun karɓuwar watsa hotuna tare da babban yuwuwar, kuma yanayin bai shafe shi ba ko kuma yanayin ba shi da tasiri.
Gabaɗaya ana amfani da eriya ta gabaɗaya a ƙarshen duka na mai karɓa da mai karɓa, kuma tura tsarin yana da sauƙi, abin dogaro, da sassauƙa.
2, Ya dace da babban saurin wayar hannu, kuma ana iya amfani da shi ga motocin, jiragen ruwa, helikofta / drones da sauran dandamali.
Microwave na al'ada, LAN mara waya da sauran na'urori ba za su iya fahimtar watsa wayar hannu na ƙarshen transceiver ba kuma za su iya gane watsa madaidaicin wurin kawai a ƙarƙashin wasu yanayi.Tsarinsa yana da hanyoyin haɗin fasaha da yawa, injiniyoyi masu rikitarwa, rage dogaro, da tsada sosai.
Duk da haka, don kayan aiki na COFDM, ba ya buƙatar ƙarin na'urori, yana iya gane amfani da ƙayyadaddun kayan aiki, dakunan dakunan hannu, kuma yana da matukar dacewa don shigarwa akan dandamali na wayar hannu kamar motoci, jiragen ruwa, helikofta / drones, da dai sauransu. Watsawa yana da babban aminci da babban aiki mai tsada.
3. Ya dace da watsa bayanai mai sauri, gabaɗaya mafi girma fiye da 4Mbps, don saduwa da watsa bidiyo mai inganci da sauti.
Baya ga abubuwan da ake buƙata don kyamarori, bidiyo mai inganci da sauti suna da buƙatu masu girma don ɓoye rafukan rafuka da ƙimar tashoshi, kuma kowane mai ɗaukar hoto na fasahar COFDM zai iya zaɓar QPSK, 16QAM, 64QAM da sauran haɓakar saurin sauri, da ƙimar tashar da aka haɗa. gabaɗaya ya fi 4Mbps.Saboda haka, zai iya aika 4: 2: 0, 4: 2: 2 da sauran high quality codecs a cikin MPEG2, da kuma image ƙuduri na karshen samu iya isa 1080P, wanda ya gana da bukatun post-bincike, ajiya, tace da kuma haka kuma.
4, A hadaddun electromagnetic muhallin, COFDM yana da kyau kwarai rigakafi ga tsoma baki.
A cikin tsarin mai ɗaukar kaya guda ɗaya, faɗuwa ɗaya ko tsangwama na iya haifar da gaba ɗaya hanyar haɗin sadarwa ta kasa, amma a cikin tsarin COFDM mai ɗaukar kaya da yawa, ƙananan kaso na masu ɗaukar kaya ne kawai ake tsoma baki tare da su, kuma ana iya gyara waɗannan tashoshin tashoshi tare da lambobin gyara kuskure. don tabbatar da ƙananan kuskuren watsawa.
5. Amfani da tashar yana da girma.
Wannan yana da mahimmanci musamman a cikin mahalli mara waya tare da ƙayyadaddun albarkatun bakan, inda amfani da tsarin ya kasance 2Baud/Hz lokacin da adadin masu ɗaukar kaya ya yi yawa.
Aiwatar da fasahar COFDM zuwa mai watsa bidiyo mara waya ta IWAVE
A halin yanzu ana amfani da COFDM a cikin DVB (Digital Video Broadcasting), DVB-T, DVB-S, DVB-C da dai sauransu don watsa bayanai na UAV mai sauri.
Tare da ci gaban fasaha, ana samun ƙarin jiragen sama marasa matuƙa da UAV masu hidima ga mutane a cikin ayyuka daban-daban.IWAVE yana mai da hankali kan ƙira, haɓakawa, da siyar da hanyoyin sadarwar mara waya don jirage marasa matuƙa na kasuwanci da robotics.
Maganganun sune 800Mhz, 1.4Ghz, 2.3Ghz, 2.4Ghz da 2.5Ghz, 5km-8km, 10-16km da 20-50km bidiyo da dijital Bi-directional Serial Data Links tare da fasahar COFDM.
Matsakaicin saurin gudu na tsarinmu shine 400km / h.A lokacin irin wannan babban gudun tsarin kuma zai iya tabbatar da ingantaccen siginar bidiyo.
Don gajeriyar kewayon 5-8km, ana amfani da OFDM don watsa bidiyo na UAV/FPV ko Multi rotor don bidiyo, siginar Ethernet da bayanan serial kamar su.Saukewa: FIP-2405kumaFIM-2405.
Don dogon zangon 20-50km, muna ba da shawarar wannan jerin samfuran kamarFIM2450kumaSaukewa: FIP2420
IWAVE's yana ɗaukar ci-gaba fasahar COFDM zuwa samfuranmu, mai da hankali kan haɓaka tsarin sadarwar gaggawa na turawa cikin sauri.Dangane da shekaru 14 na fasahar tarawa da gogewa, muna jagorantar yanki ta hanyar amincin kayan aiki tare da ƙarfin NLOS mai ƙarfi, tsayin tsayi da tsayin aiki a cikin UAV, robotics, kasuwar sadarwar mara waya ta motocin.
Shawarwarin Samfura masu alaƙa
Lokacin aikawa: Afrilu-20-2023