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100km TDD bidirectional video data wireless transmission Appearance
تاريخ الإصدار
| تاريخ | الإصدار | وصف التعديل |
| 20231219 | الإصدار 1.0 | النسخة الأولية |
| 20240315 | V2.0 | Modify the weight dimensions, modify the total data in Table MCS & حساسية |
| 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 |
نظرة عامة
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, اختيار التردد التكيفي, تيار التكيفي, إعادة الإرسال التلقائي, and automatic power control, الذي يحسن إلى حد كبير من قدرة مكافحة الأضداد ومضادات التداخل, ولديها خصائص الموثوقية العالية, استقرار جيد, وتأخير منخفض.
هذا المنتج مناسب لمكافحة الحرائق, تفتيش, يراقب, وسيناريوهات أخرى, 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: ما يصل إلى 17 ميجابت في الثانية بسرعة 10 ميجاهرتز.
- 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: الكشف التلقائي عن إشارات التداخل, real time selection of the optimal frequency point.
- يدعم إعادة الإرسال التلقائي: Automatic retransmission of burst error data improves data reliability.
- يدعم تيار التكيف: 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.
- يدعم الاختيار التلقائي للهوائي: وفقا لحالة الانسداد, the optimal antenna transmission is selected in real time.
- Supports the coexistence of multiple set: الدعم حتى 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.
تخصيص
| معلمة النظام | الفهرس الفني |
| Equipment model | VCAN1933-8W |
| تردد العمل | 1350~ 1470MHz |
| موجة تردد الراديو | 2T2R |
| انتقال السلطة | 39ديسيبل (8-واتس السلطة الفلسطينية) |
| بعد انتقال | 100كم (Air-to-ground LOS) |
| عرض نطاق القناة | 10ميغاهيرتز |
| تعديل الوضع | QPSK/16QAM |
| تلقي الحساسية | انظر الجدول (MCS & حساسية) |
| سرعة | 17ميجابت في الثانية@16QAM3/4 |
| تشفير الاتصالات | AES256 |
| تأخير الإرسال | ≥10 مللي ثانية |
| واجهة تردد الراديو | SMA*2 |
| Equipment interface | XT30PW-M |
| Equipment interface | 100Mbps Ethernet*2 |
| تل/RS232*2 | |
| RS422*1 | |
| SBUS/TTL*1 | |
| Overall power consumption | ≤48W@4Mbps(Air uint) |
| ≤12W@1Mbps(Ground uint) | |
| البعد(L * W * H) | 163*77*25مم |
| وزن | 340ز |
| طاقة كهربائية شغالة | DC22~30V,قيمة نموذجية: +24V@2A |
| درجة حرارة العمل | -40~+75℃ |
| MCS & حساسية (10ميغاهيرتز) | |||
| No. | MCS | Total uplink and downlink throughput (ميغابت في الثانية) | حساسية (ديسيبل) |
| 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 |
Product dimension and weight
Dimension diagram
البعد والوزن
- البعد (L * W * H): 163mm*77mm*25mm(including SMA 10mm)
- وزن : 340ز
Product interface definition
مخطط الواجهة
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.
تعريف الواجهة
واجهة الطاقة: XT30PW-M. السلطة نطاق العرض: DC22-30V Typical value:24V@2A
| Linear order. | اسم الدبوس | تعريف الواجهة | وصف الواجهة | Signal direction |
| 1,2,3,4 | GND | أرضي | أرضي | |
| 5 | 422ا | Serial port 3 RS-422 | Receiving data RX+ | أنا |
| 6 | 422ب | Receiving data RX- | أنا | |
| 7 | 422ض | Transmitting data TX- | ال | |
| 8 | 422و | Transmitting data TX+ | ال | |
| 9 | TXD_A | Serial port 1 RS232/TTL | Transmitting data TX | ال |
| 10 | RXD_A | Receiving data RX | أنا | |
| 11 | TXD_B | Serial port 2 RS232/TTL | Transmitting data TX | ال |
| 12 | RXD_B | Receiving data RX | أنا | |
| 13 | GND | منفذ تسلسلي 2 أرض | ال | |
| 14 | SBUS /TTL TX | Serial port 4 SBUS/TTL | SBUS/TTL sending | ال |
| 15 | SBUS /TTL RX | SBUS/TTL receiving | أنا | |
| 16 | SBUS/TTL GND | SBUS/TTL ground | ال | |
| 17 | TX1P+ | منفذ الشبكة 1 | Transmitting data TX+ | ال |
| 18 | TX1M- | Transmitting data TX- | ال | |
| 19 | RX1P+ | Receiving data RX+ | أنا | |
| 20 | RX1M- | Receiving data RX- | أنا | |
| 21 | GND | أرضي | منفذ تسلسلي 1 أرض | ال |
| 22 | TX2P+ | منفذ الشبكة 2 | Transmitting data TX+ | ال |
| 23 | TX2M- | Transmitting data TX- | ال | |
| 24 | RX2P+ | Receiving data RX+ | أنا | |
| 25 | RX2M- | Receiving data RX- | أنا |
- ملحوظة 1: Signal direction I indicates radio input and direction O indicates radio output.
- ملحوظة 2: When using the serial port 1/2 of the device, please check whether it is TTL level or RS232 level.
أناndicator Meaning
Power Light PWR （Green）
عندما يكون ضوء PWR قيد التشغيل, يتم تشغيل الجهاز.
SYNC（green）
Out of sync state, light flashing.
After synchronization, the light is steady on.
Network port light : لان1, LAN2 (green）
The network port light blinks when data is being sent or
received.
Receiving signal energy light(RSSI 3 green lights)
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 | Received energy dBm |
| 3 RSSI lights on | about -50dBm |
| 2 RSSI lights on | about -80dBm |
| 1 RSSI light on | about -95dBm |
| نوع الوحدة | الوضع | Vcan1933-8W light status | |||
| PWR | مزامنة | LAN 1 LAN 2 | RSSI 123 | ||
| رئيسي - سيد | Un-sync | قيد التشغيل | وميض | Data sending and receiving, وامض | إيقاف |
| رئيسي - سيد | المزامنة | قيد التشغيل | Steady on | Data sending and receiving, وامض | Proportional to the strength of the received signal |
| عبد | Un-sync | قيد التشغيل | وميض | Data sending and receiving, وامض | البحث |
| عبد | المزامنة | قيد التشغيل | Steady on | Data sending and receiving, وامض | 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. عندما يقوم منفذ الشبكة بإرسال البيانات أو تلقيها, the master and slave devices correspond to LAN1, and the LAN2 indicator blinks.
More information about the product
TDD (تقسيم الوقت دوبلكينغ) is a communication technique used in wireless systems where the uplink (transmitting data from the ground control station to the drone) والوصلة الهابطة (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) والوصلة الهابطة (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 (على سبيل المثال, تدفق الفيديو).
Comparison Between TDD and FDD
| ميزة | TDD | فد |
|---|---|---|
| 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 | نعم فعلا, supports advanced techniques like beamforming | لا |
| التشوش | 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.
قيود القوة والحجم:
- 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.
نظام الهوائي:
- On Drone: Fiberglass omnidirectional or small directional patch antennas.
- المحطة الأرضية: High-gain parabolic, Yagi antennas or flat panel antennas with tracking systems للاتصالات بعيدة المدى.
تطبيقات
- المراقبة والأمن: Real-time video streaming from drones for law enforcement or border control.
- البث: High-definition aerial footage for live events or media.
- زراعة: Monitoring crops and livestock over vast areas.
- استجابة الكوارث: Sending live video from disaster sites for better coordination.
ال نطاق الإرسال of an 8-watt power amplifier (السلطة الفلسطينية) depends on a variety of factors, بما فيها:
- نطاق التردد: Higher frequencies experience more signal loss over distance (higher free-space path loss).
- كسب الهوائي: The type and gain of the antenna at both ends (الارسال والاستقبال) significantly impact the range.
- الظروف البيئية: Factors like terrain, البنايات, طقس (تمطر, ضباب), وخط البصر (LoS) can affect range.
- Modulation Scheme and Data Rate: More complex modulation schemes (على سبيل المثال, QAM) and higher data rates may reduce effective range due to higher sensitivity to signal degradation.
- حساسية المتلقي: The ability of the receiver to detect a weak signal at a specific distance.
طرح سؤال
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