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100km TDD bidirectional video data wireless transmission Appearance

Ιστορικό έκδοσης
| Ημερομηνία | Εκδοχή | Περιγραφή τροποποίησης |
| 20231219 | V1.0 | Αρχική έκδοση |
| 20240315 | V2.0 | Modify the weight dimensions, modify the total data in Table MCS & ευαισθησία |
| 20240405 | V3.0 | Add multiple sets of coexistence switches. Modify the serial-to-network configuration mode. Modify the ID number length and modify the English words of background noise detection. Added the frequency matching function |
ΣΦΑΙΡΙΚΗ ΕΙΚΟΝΑ
Vcan1933-8-Watt PA is a self-developed TDD bidirectional graph integrated wireless transmission device. The product has the functions of real-time interference detection, προσαρμοστική επιλογή συχνότητας, προσαρμοστική ροή, αυτόματη αναμετάδοση, and automatic power control, η οποία βελτιώνει σημαντικά την ικανότητα του αντι-πολεμιστού και της αντι-παρεμβολής, και έχει τα χαρακτηριστικά της υψηλής αξιοπιστίας, καλή σταθερότητα, και χαμηλή καθυστέρηση.
Αυτό το προϊόν είναι κατάλληλο για πυρόσβεση, επιθεώρηση, παρακολούθηση, και άλλα σενάρια, and can transmit 100KM under good air-to-ground vision.
Product Characteristics
- Support long-distance transmission: 4M code flow can be transmitted up to 100km.
- Supports large bandwidth transmission: Έως 17Mbps@10MHz.
- Supports automatic repeater transmission: Supports automatic trunk addition.
- Supports multi-interface design: The device has two network ports and four serial ports, supporting RS232/TTL/RS422/SBUS.
- Supports automatic frequency selection: Αυτόματη ανίχνευση σημάτων παρεμβολής, real time selection of the optimal frequency point.
- Υποστηρίζει αυτόματη αναμετάδοση: Automatic retransmission of burst error data improves data reliability.
- Υποστηρίζει προσαρμοστική ροή: The channel modulation mode is automatically adjusted according to the signal quality in real time.
- Supports automatic power control: Close range automatic adjustment of transmission power, reduce power consumption.
- Υποστηρίζει αυτόματη επιλογή κεραίας: Σύμφωνα με την κατάσταση απόφραξης, the optimal antenna transmission is selected in real time.
- Supports the coexistence of multiple set: Υποστηρίζω 6 sets of equipment at the same time fixed frequency use.
- Supports the frequency matching function: Software can be used to configure the frequency and hardware key frequency.
Προσδιορισμός
| Παράμετρος συστήματος | Τεχνικός δείκτης |
| Equipment model | VCAN1933-8W |
| συχνότητα εργασίας | 1350~ 1470 MHz |
| Ραδιοσυχνοτητα | 2T2R |
| Ισχύς μετάδοσης | 39dBm (8-watt PA) |
| απόσταση μετάδοσης | 100KM (Air-to-ground LOS) |
| Εύρος Καναλιού | 10MHz |
| λειτουργία Διαμόρφωση | QPSK/16QAM |
| Λήψη ευαισθησίας | Δείτε το τραπέζι (MCS & ευαισθησία) |
| Ταχύτητα | 17Mbps@16QAM3/4 |
| Κρυπτογράφηση επικοινωνίας | Ενσωματωμένος ήχος HDMI ή ενσωματωμένος ήχος SDI ή AV |
| Καθυστέρηση μετάδοσης | ≤10ms |
| Διασύνδεση ραδιοσυχνότητας | SMA*2 |
| Equipment interface | XT30PW-M |
| Equipment interface | 100Mbps Ethernet*2 |
| TTL/RS232*2 | |
| RS422*1 | |
| SBUS/TTL*1 | |
| Συνολική κατανάλωση ρεύματος | ≤48W@4Mbps(Air uint) |
| ≤12W@1Mbps(Ground uint) | |
| Διάσταση(L * W * H) | 163*77*25mm |
| Βάρος | 340σολ |
| τάση εργασίας | DC22~30V,Τυπική τιμή: +24V@2A |
| θερμοκρασία λειτουργίας | -40~+75℃ |
| MCS & ευαισθησία (10MHz) | |||
| No. | MCS | Total uplink and downlink throughput (Mbps) | ευαισθησία (dBm) |
| 1 | QPSK1 / 3 | 4.0 | -99 |
| 2 | QPSK1 / 2 | 5.8 | -98 |
| 3 | QPSK2/3 | 7.1 | -97 |
| 4 | QPSK3/4 | 8.2 | -96 |
| 5 | 16QAM1 / 3 | 8.0 | -96 |
| 6 | 16QAM1 / 2 | 11.6 | -95 |
| 7 | 16QAM2/3 | 14.3 | -93 |
| 8 | 16GAM3 / 4 | 16.4 | -91 |
Πroduct dimension and weight
Διάγραμμα διάστασης

Διάσταση και βάρος
- Διάσταση (L * W * H): 163mm*77mm*25mm(συμπεριλαμβανομένου του SMA 10mm)
- Βάρος : 340σολ
Ορισμός διεπαφής προϊόντος
Διάγραμμα διασύνδεσης

The interface of the Vcan1933-8W device includes the XT30PW-M power interface and J30J-25pin data interface. The interface has RS232/TTL*2, RS422*1, SBUS/TTL*1 and 100 Mbit/s Ethernet*2.
Ορισμός διασύνδεσης
Διασύνδεση ισχύος: XT30PW-M. φάσμα παροχής ρεύματος: DC22-30V Typical value:24V@2A
| Linear order. | Όνομα καρφίτσας | Ορισμός διασύνδεσης | Περιγραφή διασύνδεσης | Signal direction |
| 1,2,3,4 | GND | Εδαφος | Εδαφος | |
| 5 | 422ΕΝΑ | Serial port 3 RS-422 | Receiving data RX+ | Εγώ |
| 6 | 422σι | Receiving data RX- | Εγώ | |
| 7 | 422Ζ | Transmitting data TX- | ο | |
| 8 | 422και | Transmitting data TX+ | ο | |
| 9 | TXD_A | Serial port 1 RS232/TTL | Transmitting data TX | ο |
| 10 | RXD_A | Receiving data RX | Εγώ | |
| 11 | TXD_B | Serial port 2 RS232/TTL | Transmitting data TX | ο |
| 12 | RXD_B | Receiving data RX | Εγώ | |
| 13 | GND | Σειριακή θύρα 2 έδαφος | ο | |
| 14 | SBUS /TTL TX | Serial port 4 SBUS/TTL | SBUS/TTL sending | ο |
| 15 | SBUS /TTL RX | SBUS/TTL receiving | Εγώ | |
| 16 | SBUS/TTL GND | SBUS/TTL ground | ο | |
| 17 | TX1P+ | θύρα δικτύου 1 | Transmitting data TX+ | ο |
| 18 | TX1M- | Transmitting data TX- | ο | |
| 19 | RX1P+ | Receiving data RX+ | Εγώ | |
| 20 | RX1M- | Receiving data RX- | Εγώ | |
| 21 | GND | Εδαφος | Σειριακή θύρα 1 έδαφος | ο |
| 22 | TX2P+ | θύρα δικτύου 2 | Transmitting data TX+ | ο |
| 23 | TX2M- | Transmitting data TX- | ο | |
| 24 | RX2P+ | Receiving data RX+ | Εγώ | |
| 25 | RX2M- | Receiving data RX- | Εγώ |
- Σημείωση 1: Signal direction I indicates radio input and direction O indicates radio output.
- Σημείωση 2: When using the serial port 1/2 of the device, please check whether it is TTL level or RS232 level.
Εγώndicator Meaning

Power Light PWR (Πράσινο)
Όταν το φως PWR είναι ενεργοποιημένο, Η συσκευή είναι ενεργοποιημένη.
SYNC(green)
Out of sync state, light flashing.
Μετά το συγχρονισμό, the light is steady on.
Network port light : LAN1, LAN2 (green)
The network port light blinks when data is being sent or
received.
Receiving signal energy light(RSSI 3 πράσινα φώτα)
The greater the number of energy lights, the greater the
signal reception strength.
| The RSSI light represents the strength of the received signal | |
| Number of RSSI energy lights on | Λήψη ενέργειας dBm |
| 3 RSSI lights on | about -50dBm |
| 2 RSSI lights on | about -80dBm |
| 1 RSSI light on | about -95dBm |
| Τύπος μονάδας | Τρόπος | Vcan1933-8W light status | |||
| PWR | ΣΥΓΧΡΟΝΙΣΜΟΣ | LAN 1 LAN 2 | RSSI 123 | ||
| κύριος | Un-sync | Ενεργοποιημένο | Αναβοσβήνει | Data sending and receiving, αναβοσβήνει | Μακριά από |
| κύριος | Sync | Ενεργοποιημένο | Steady on | Data sending and receiving, αναβοσβήνει | Proportional to the strength of the received signal |
| δούλος | Un-sync | Ενεργοποιημένο | Αναβοσβήνει | Data sending and receiving, αναβοσβήνει | Ερευνητικός |
| δούλος | Sync | Ενεργοποιημένο | Steady on | Data sending and receiving, αναβοσβήνει | Proportional to the strength of the received signal |
When the master and slave devices are not synchronized, the PWR indicator of the master and slave devices is steady on, the SYNC indicator is blinking, and the RSSI indicator of the master device is off. The RSSI of the slave device will always be in the search state. After the master/slave synchronization, the SYNC indicator of the master/slave is steady on. The master-slave RSSI lamp displays the received signal energy intensity. Όταν η θύρα δικτύου στέλνει ή λαμβάνει δεδομένα, the master and slave devices correspond to LAN1, and the LAN2 indicator blinks.
More information about the product
TDD (Διεύθυνση διαίρεσης χρόνου) is a communication technique used in wireless systems where the uplink (transmitting data from the ground control station to the drone) και downlink (transmitting video and data from the UAV to the ground receiver or GCS) share the same frequency channel but operate in different time slots. This allows bidirectional communication without requiring separate frequency bands for each direction.
TDD Protocol Optimization
- Ensure proper time slot allocation between uplink (sending data) και downlink (receiving data) for efficient bidirectional communication.
- Adaptive TDD allows dynamic allocation based on data traffic needs.
- Useful in applications where uplink and downlink traffic are asymmetric (π.χ., ροή βίντεο).
Comparison Between TDD and FDD
| χαρακτηριστικό | TDD | FDD |
|---|---|---|
| Spectrum Usage | Single frequency band | Separate bands for uplink and downlink |
| Traffic Adaptability | Highly adaptable to asymmetric traffic | Fixed uplink/downlink ratio |
| Equipment Complexity | Lower cost and simpler hardware | Requires duplexers, increasing cost |
| Channel Reciprocity | Ναί, supports advanced techniques like beamforming | Οχι |
| Παρέμβαση | Requires strict synchronization | Less prone to interference |
TDD is widely used in modern communication systems, including those requiring long-range bidirectional video transmission due to its efficiency and flexibility.
Περιορισμοί ισχύος και μεγέθους:
- Lightweight hardware to minimize the impact on drone flight performance.
- Low-power consumption design to maximize drone battery life.
- Compact form factor to fit within the drone’s payload.
Σύστημα κεραίας:
- On Drone: Fiberglass omnidirectional or small directional patch antennas.
- Σταθμός εδάφους: High-gain parabolic, Yagi antennas or flat panel antennas with tracking systems για επικοινωνία μεγάλης εμβέλειας.
εφαρμογές
- Επιτήρηση και Ασφάλεια: Real-time video streaming from drones for law enforcement or border control.
- Ραδιοφωνικός: High-definition aerial footage for live events or media.
- Γεωργία: Monitoring crops and livestock over vast areas.
- Απάντηση σε καταστροφές: Sending live video from disaster sites for better coordination.
ο φάσμα μεταφοράς of an 8-watt power amplifier (ΡΑ) depends on a variety of factors, συμπεριλαμβανομένου:
- Ζώνη συχνοτήτων: Higher frequencies experience more signal loss over distance (higher free-space path loss).
- Antenna Gain: The type and gain of the antenna at both ends (πομπός και δέκτης) significantly impact the range.
- Περιβαλλοντικές Συνθήκες: Factors like terrain, κτίρια, καιρός (βροχή, ομίχλη), και οπτική επαφή (Ευσέβεια) can affect range.
- Modulation Scheme and Data Rate: More complex modulation schemes (π.χ., QAM) and higher data rates may reduce effective range due to higher sensitivity to signal degradation.
- Ευαισθησία δέκτη: The ability of the receiver to detect a weak signal at a specific distance.

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