FHSS Wigo wa kuruka-ruka kwa kasi kwa kisambaza data na kipokezi cha kiungo cha video zisizo na waya
How does FHSS work on the drone wireless video transmitter and receiver?
FHSS is an automatic frequency modulation technology. We widely used FHSS in wireless video data transmission of drones. Because the drone’s wireless link is often subject to signal interference.
Katika video hii, this frequency point shows the current signal strength.
The 1365 we see is the current signal working frequency point of our wireless transmission equipment.
Why does this frequency go here?
Because there are other signals on the right that are interfering. It will run automatically.
If the signal receives interference again, it runs away again, choosing the frequency with the least interference.
This process is meant to avoid interference. We also call it the FHSS function.
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Kiunga cha data ya video isiyotumia waya ya Drone mesh 150-200km ya masafa marefu ya kipitishio cha mtandao kisicho na kituo. -
Kiungo cha Drone cha usambazaji wa Telemetry wa Video wa masafa marefu bila waya kati ya UAV na Kituo cha Kudhibiti Ardhi -
22data ya video isiyo na waya ya km kiunga cha kudhibiti RC cha kisambazaji cha kamera ya ethernet ya ip na kipokeaji fhss Vcan1806
Q1: What is the FHSS Frequency-hopping spread spectrum?
A1: Wigo wa kuenea kwa kurukaruka mara kwa mara (Muundo huu uliundwa kwa ajili ya upitishaji wa video na data bila waya na kiungo cha data kisichotumia waya cha njia mbili) is a method of transmitting radio signals that involves rapidly changing the carrier frequency among a wide range of frequencies.
FHSS will occur automatically on both the transmitter and receiver at the same time. FHSS is used to prevent eavesdropping and interference on the long-range wireless video transmitter and receiver. When the current working frequency is jammed or interfered with, the transmitter and receiver disconnect and hop to the next available frequency to reconnect.
Q2: Why do you need the FHSS function?
A2:
1. Because the signal hops to a different frequency band, FHSS signals are highly resistant to narrow-band interference.
2. If the frequency-hopping pattern is unknown, signals are difficult to intercept.
3. Jamming is also difficult if the pattern is unknown; if the spreading sequence is unknown, the signal can only be jammed for a single hopping period.
4. With minimal mutual interference, FHSS transmissions can share a frequency band with many types of conventional transmissions. FHSS signals interfere in narrow-band communications and vice versa.
Q3: How to set the FHSS at your wireless video data transmitter and receiver?
A3: At the web manager UI, please choose the advance page, you can see the above picture.
https://i0.wp.com/ivcan.com/wp-content/uploads/2022/02/UI-Advance.webp
Q4: 7 tips you should know before you choose a wireless video transmitter and receiver with FHSS function.
A4:
1. TX900B-2W supports the frequency range is 1420~1530MHz, na kuna kipimo data cha 110Mb cha kutumia.
2. Mteja anaweza kuweka kipimo data cha kufanya kazi kama 1.4M/3M/5M/10M/20MHz (Hata hivyo, 1.4M/3MHz may not be suited for video transmitting). Kisha TX900B-2W inaweza kufanya kazi ndani Njia ya FHSS (Wigo wa kuenea kwa kurukaruka mara kwa mara) and the system will automatically select the central working frequency and may do frequency hopping (kati ya 1420 ~ 1530MHz) wakati wa kazi yake.
3. Wateja wanaweza pia kupanga kutumia chaneli za masafa kwa jumla ya 1420 ~ 1530MHz na kuweka kifaa kufanya kazi katika chaneli zisizobadilika za masafa pia..
4. TX900B-2W supports the longest distance at 22km.
Isipokuwa masafa yanayotumika na umbali mrefu zaidi, mwonekano wa kimwili, interface, UI, operesheni, Nakadhalika, TX900B-2W ni sawa na TX900B-15km-2W iliyopo.
5. TX900B-2W only support a frequency range is 1420~1530MHz, it does not support 800MHz and 2.4GHz frequency range.
6. Kuna matoleo mawili, TX900B-2W-15km, na TX900B-2W-22km.
7. As the TX900B-2W frequency range is 110Mb, so if you config the working bandwidth as 10Mb, basi utapata 11 pointi kwa kurukaruka.
Q5: What is the working principle of your FHSS?
Our wireless video transceiver adopts intelligent frequency selection-interference avoidance.
Intelligent frequency selection (interference avoidance) technology is a new anti-interference technology, which can effectively avoid interference and maximize the reliability and stability of wireless transmission.
The key to our unique intelligent frequency selection (interference avoidance) technology lies in the three major processes of interference detection, decision-making, and switching execution. Interference detection refers to real-time detection of interference and background noise at each frequency point during normal communication, so as to provide basic support for decision-making. The decision-making is completed independently by each node, and the optimal frequency is selected based on the criterion of optimizing its own receiving performance. The point is used as the receiving frequency point; the switching execution occurs after the decision selects a new optimal frequency point, and the switching process will not cause data loss, ensuring stable and continuous data transmission.
Our unique intelligent frequency selection (disturbance avoidance) technology enables each node to independently and dynamically select different optimal frequency points for different frequency networking, so as to optimize the overall network performance and effectively avoid interference.
Tafadhali angalia picha hapa chini, the blue area is the effective signal, na the red line is interference. 
Q6: Does your FPV VTX support the FHSS frequency automatic jumping function to avoid interference?
FPV VTX is a one-way transmission and cannot support the FHSS frequency automatic hopping function.
FPV VTX is a one-way transmission, which can transmit the video from the aircraft to the ground receiver through the transmitter.
FHSS function, when the user finds that the signal sensitivity is declining or encounters an obstacle, it will notify the transmitter and receiver to modify the frequency at the same time and find a frequency with the least interference for transmission. If only the receiver modifies the frequency without controlling the transmitter to modify the same frequency, the frequency of the transmitter and receiver will be inconsistent and the transmission will be interrupted.
Because of the above requirement of notifying the transmitter to modify the frequency, the FHSS function needs to be based on a two-way transmission system.
Or your FPV VTX can support modifying the frequency function through the serial port. When you need to modify the frequency, the operator sends a preset serial port command from the receiver to the serial port of the transmitter. After receiving this command notification, the transmitter automatically changes to the next frequency point.
This is equivalent to your wireless transmission equipment, which has both a one-way video transmission function and a two-way data transmission function, which is equivalent to your current wireless control system. So whether it supports the serial port to modify the frequency of the transmitter depends on whether your current device supports it.
Our models below support such functionality.
Vcan1776 Mnamo 1886
Q: Do you have a video data link as per the below requirement?
The required distance is 50 kilomita, Muundo huu uliundwa kwa ajili ya upitishaji wa video na data bila waya na kiungo cha data kisichotumia waya cha njia mbili (jumping over 1,000 times in one second), ideally above 6Ghz (others can be considered, the most important thing is frequency hopping technology), and it is also necessary to transmit data, video, and protect the remote control channel, preferably A set of data links (transmita + receiver + antenna) using frequency hopping technology (Muundo huu uliundwa kwa ajili ya upitishaji wa video na data bila waya na kiungo cha data kisichotumia waya cha njia mbili)
iVcan Reply: Hapana, The frequency is only 1.4G, the working frequency for 6Ghz needs custom development.
Q: Do you have any optional model to support the FHSS Frequency-hopping spread spectrum?
In the below picture, you can see that there are 12 points frequency ready for FHSS.
Real-time interference detection function
The products that support FHSS
Drone Video Transmitter support FHSS
Radio Telemetry support FHSS
Video ya hivi punde ya majaribio ya kisambazaji Video cha masafa marefu isiyo na waya isiyo na rubani na Kipokeaji
2W PA 27KM Mtihani Halisi kutoka juu ya mlima hadi bahari Line-of-Sight
Karibuni 110km jaribu video ya kisambazaji Video cha masafa marefu isiyo na waya isiyo na rubani na Kipokeaji
Kisambazaji video kisichotumia waya cha NLOS na video ya majaribio ya kipokeaji katika kujenga lifti ya ndani isiyo ya mstari wa kuona
65 KM drone UAV Kweli kuruka Jaribio Wireless Video Usambazaji
65 KM drone UAV Kweli kuruka Jaribio Wireless Video Usambazaji
1.5km kwa NLOS ya ardhini, 10-20-30km LOS hewa hadi ardhini upitishaji wa kipokezi cha kisambaza video kisichotumia waya
COFDM-912T NLOS (zisizo mstari wa mbele) 1.5km mtihani halisi katika mji, majengo, miti na barabara
Kiolesura cha Kudhibiti Kifaa cha Wavuti cha upitishaji wa kisambaza data cha video kisichotumia waya cha UAV kwa kamera ya IP Net
Kisambazaji cha Video cha bei nafuu zaidi cha CVBS RCA 720P + 1080Msaada wa Mpokeaji wa P 128 usimbuaji fiche
COFDM-912T Jaribio la kweli katika mazingira changamano ya jiji, transmita kwenye gari, mpokeaji katika jengo hilo
Kisambazaji video cha Nafuu kisichotumia waya na skrini ndogo ya mpokeaji ina usaidizi mkubwa wa kufunga nguvu ya mawimbi
Kisambazaji Video Isiyo na Waya cha OFDM kwa Mtandao wa Kiotomatiki wa Kamera za IP Uzito Nyepesi wa Masafa Marefu
Transmission Umbali
Itifaki ya Kudhibiti Ndege
Ingizo la Video ya Kisambazaji
Njia ya Kusambaza Bila Waya
Kikwazo na Maono
Simbua na usimbue
Mtoa huduma wa Usambazaji
Mwelekeo wa Data
antenna
Maswali Yanayoulizwa Mara kwa Mara kuhusu Kisambazaji na Kipokea Video Isiyotumia Waya
Visambazaji video vyetu visivyotumia waya vina aina hizi za violesura vya ingizo vya video: HDMI 1080P na 4K HDMI, Mchanganyiko wa CVBS, SDI, AHD, IP Ethernet, BNC, au tuambie unahitaji aina gani, mhandisi wetu atarekebisha ili kukidhi mahitaji yako.
Umbali wetu wa maambukizi unaweza kurekebishwa kwa kuongeza vikuza nguvu. Wakati huu, kuu ni 15km, 30km, 50km, 80km, 100km , na 150km, ambayo inategemea mahitaji ya wateja.
Bila shaka, umbali wa upitishaji ulioorodheshwa hapo juu zote ziko ndani LOS safu ya mstari wa kuona. Ikiwa kuna vikwazo kati ya transmita na mpokeaji, NLOS (yasiyo ya mstari wa kuona), umbali wa maambukizi umepunguzwa sana, km 1 tu au 2km, kulingana na idadi ya vikwazo vya kati na mazingira ya ndani ya wireless.
Njia moja maana yake, Tunaweza tu kusambaza na kupakua video au data kutoka kwa kisambaza video kisichotumia waya hadi kwa kipokeaji katika mwelekeo mmoja, na hatuwezi kupakia video au data kutoka kwa mpokeaji hadi kwa kisambazaji. Aina hii pia inaitwa simplex.
Njia mbili maana yake, sio tu tunaweza kupakua video au data kutoka kwa kisambazaji chetu kisichotumia waya hadi kwa kipokeaji, lakini pia tunaweza kupakia video au data kutoka kwa kipokeaji hadi kwa kisambazaji. Hii inafaa sana kwa uendeshaji wa drones. Huwezi tu kuona video ya wakati halisi inayotumwa kutoka kwa drone, lakini pia pakia amri ya kudhibiti drone au amri ya kudhibiti kamera ya PTZ kurekebisha pembe kwa kisambazaji.. Hii inaweza kufanya kazi wakati huo huo. Aina hii pia iliita nusu-dulpex au full-duplex.
Tafadhali angalia maelezo kwenye kiungo kilicho hapa chini. https://ivcan.com/request-a-quote-of-wireless-video-transmission/#simplex
Visambazaji vingi vya video visivyo na waya sasa vinatumika AES128 au AES256 usimbaji fiche kidogo na usimbuaji, kulingana na mtindo gani unaochagua. Tafadhali wasiliana nasi ili kuthibitisha.
Masafa ya kisambazaji video kisichotumia waya na kipokea video kisichotumia waya zinaweza kubadilishwa. Watumiaji wanahitaji kununua bodi za ziada za usanidi wa parameta.
Hata hivyo, kwa kuzingatia kwamba amplifier ya nguvu inayolingana na antenna tayari imewekwa ndani ya safu fulani wakati bidhaa zinatumwa nje.. Ikiwa mtumiaji atarekebisha mzunguko wa kisambazaji, sambamba amplifier ya nguvu, antena ya kisambazaji na antena ya mpokeaji inapaswa pia kurekebishwa kwa masafa sawa, na watumiaji hawa wanahitaji kutayarishwa. Ikiwa sivyo, itasababisha mzunguko wa transmitter ya video isiyo na waya kuwa tofauti na mzunguko wa antenna, kufanya mapokezi kuwa magumu. Kwa hivyo tafadhali hakikisha kuwa umekufahamisha masafa sahihi unayohitaji kabla ya kuagiza.
Ikiwa ni kwa ajili ya usalama au usiri, unaweza tumia usimbaji fiche na usimbuaji kazi za transmitter na mpokeaji, ambayo inaweza kuhakikisha kuwa usambazaji wa video yako ni wa faragha. .
Ndiyo, bidhaa zetu zote vigezo vinaweza kubinafsishwa kulingana na mahitaji ya mteja. Ikiwa una ombi maalum, tafadhali tujulishe kupitia kiungo hapa chini.
https://ivcan.com/request-a-quote-of-wireless-video-transmission/
- Badilisha nafasi ya mpokeaji ili kuzuia mwingiliano unaowezekana wa ndani kutoka kwa mazingira yenye nguvu ya sumaku.
- Hakikisha kuwa antena zimewashwa transmita na mpokeaji wote ni wima.
- Tafadhali inua antena za kisambaza data na kipokeaji kwa kudumisha tofauti fulani ya urefu.
- Tafadhali angalia pande zote ili kuhakikisha kuwa hakuna vikwazo kati ya transmita na mpokeaji.
- Badilisha mwelekeo ya antenna ya mpokeaji.
- Ikiwa haifanyi kazi, jaribu kusogeza kipokezi kuwa karibu na mahali pa kisambaza data ili kuona ikiwa inazidi umbali unaofaa wa upitishaji wa pasiwaya.
- Au fikiria kuongeza relay ya kusambaza kati ya mtoaji na mpokeaji.
- Antena inapaswa kuwa juu kutoka chini iwezekanavyo, kwani ardhi itachukua ishara inayopitishwa.
Bila shaka, tunaelewa pia kwamba visambazaji na vipokezi vya upitishaji wa video visivyotumia waya ni ghali sana. Uko mbali sana na kiwanda cha China. na tunatumai kuwa bidhaa unazopokea zinafaa kwa utendakazi bora.
Ikiwa unalipa kipaumbele maalum kwa parameter maalum au kazi, tunaweza kuchukua baadhi ya video za majaribio kulingana na vipengele unavyotaka kuona, tafadhali jisikie huru kuwasiliana nasi. Haitasafirishwa kwako moja kwa moja bila idhini yako.
Ili kujaribu kucheleweshwa kwa kisambaza video na kipokeaji kisichotumia waya, tunahitaji kufanya vipimo viwili.
Ya kwanza ni kujaribu ucheleweshaji kutoka kwa kamera hadi onyesho.
Ya pili ni kamera, pamoja na onyesho pamoja na kisambaza picha kisichotumia waya na kuchelewa kwa kipokeaji.
Kutoa matokeo mawili ya majaribio ni ucheleweshaji halisi wa kisambaza video na kipokezi kisichotumia waya.
Kama mtaalamu wa usambazaji wa video wa masafa marefu wa HDMI bila waya na msambazaji na mtengenezaji nchini China Shenzhen, tunazalisha kisambazaji na kipokeaji video bora zaidi kisichotumia waya kwa miaka mingi, na tulipata sifa nzuri na hakiki bora.
Baadhi ya bidhaa maarufu za transmita za video zisizo na waya, kama Blackmagic, Holyland Mars 300 400s, Jicho la Acsoon cine 5g, RavenEye, Zhiyun, Inkee benbox, actiontec, CVW SWIFT 800, dahua, iogear, Artek pat-225k, microlite, kumeza, teradec.
Kisambazaji bora cha video kisichotumia waya cha bajeti na kipokeaji kina programu nyingi, kwa 4K tv, Kamera ya usalama ya CCTV, kamera chelezo ya gari, Seti ya kamera ya video ya PTZ, inayoendeshwa na betri, kompyuta, kamkoda ya sony, mfumo wa mkutano wa video wa wifi, CANON DSLR, Ndege isiyo na rubani ya UAV, kompyuta ya mkononi ya pc, projekta, ndani ya gari, IPhone iPad, utiririshaji wa moja kwa moja, Kamera ya michezo ya GoPro, raspberry pi, Xbox.
Video kamili ya HD, audio, kiunga cha data kisambaza data kidogo zaidi cha 1080P kisichotumia waya na kipokeaji kina viunganishi vingi vya kuingiza na kutoa, kama CVBS ya mchanganyiko wa AV, HDMI, SDI, BNC, VGA, USB.
Mzunguko wa kisambaza video kisicho na waya cha mtumaji wa TX RX una 170-806Mhz, 1.2ghz, 2.4G, 5.8G, muda wa chini kabisa lakini sio sifuri. Ili kusaidia umbali mrefu, amplifier ya nguvu ina 10w, 20wati, na hata 30W.
Ni kipi bora zaidi cha kununua kisambaza video cha FHD kisichotumia waya kwa bei nafuu? Inapaswa kuzingatia mahitaji yako ya maelezo, kuchagua kufaa, si ghali, kama una shaka yoyote, tafadhali kutimiza omba nukuu fomu, mhandisi wetu atakupa suluhisho.
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