فهرست مطالب
100km TDD bidirectional video data wireless transmission Appearance
تاریخچه نسخه
| تاریخ | نسخه | شرح اصلاح |
| 20231219 | V1.0 | نسخه اولیه |
| 20240315 | V2.0 | Modify the weight dimensions, modify the total data in Table MCS & حساسیت |
| 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 |
بررسی اجمالی
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, انتخاب فرکانس سازگار, جریان سازگار, انتقال مجدد خودکار, and automatic power control, که توانایی ضد مبهم و ضد مداخله را تا حد زیادی بهبود می بخشد, و ویژگی های قابلیت اطمینان بالا را دارد, ثبات خوب, و تاخیر کم.
این محصول برای آتش نشانی مناسب است, بازرسی, نظارت بر, و سناریوهای دیگر, 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: تا 17 مگابیت بر ثانیه @ 10 مگاهرتز.
- 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: تشخیص خودکار سیگنال های تداخل, real time selection of the optimal frequency point.
- پشتیبانی از انتقال مجدد خودکار: Automatic retransmission of burst error data improves data reliability.
- از جریان تطبیقی پشتیبانی می کند: 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.
- از انتخاب خودکار آنتن پشتیبانی می کند: با توجه به وضعیت انسداد, the optimal antenna transmission is selected in real time.
- Supports the coexistence of multiple set: پشتیبانی تا 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.
مشخصات
| پارامتر سیستم | شاخص فنی |
| Equipment model | VCAN1933-8W |
| فرکانس کار | 13501470 مگاهرتز |
| فرکانس رادیویی | 2T2R |
| قدرت انتقال | 39DBM به (8-وات PA) |
| انتقال از راه دور | 100KM (Air-to-ground LOS) |
| پهنای باند کانال | 10مگاهرتز |
| حالت مدولاسیون | QPSK/16QAM |
| دریافت حساسیت | جدول را ببینید (مگس & حساسیت) |
| سرعت | 17Mbps@16QAM3/4 |
| رمزگذاری ارتباطات | [object Window] |
| تاخیر انتقال | ≤10 میلیثانیه |
| رابط فرکانس رادیویی | SMA*2 |
| Equipment interface | XT30PW-M |
| Equipment interface | 100Mbps Ethernet*2 |
| TTL/RS232*2 | |
| RS422*1 | |
| SBUS/TTL*1 | |
| Overall power consumption | ≤48W@4Mbps(Air uint) |
| ≤12W@1Mbps(Ground uint) | |
| بعد، ابعاد، اندازه(L * W * H) | 163*77*25میلی متر |
| وزن | 340G |
| ولتاژ کاری | DC22~30V,ارزش معمولی: +24V@2A |
| دمای کار | -40~+75℃ |
| مگس & حساسیت (10مگاهرتز) | |||
| No. | مگس | Total uplink and downlink throughput (مگابیت در ثانیه) | حساسیت (DBM به) |
| 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 |
پroduct dimension and weight
Dimension diagram
ابعاد و وزن
- بعد، ابعاد، اندازه (L * W * H): 163mm*77mm*25mm(including SMA 10mm)
- وزن : 340G
Product interface definition
نمودار رابط
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.
تعریف رابط
رابط قدرت: XT30PW-M. وسیعی منبع تغذیه: DC22-30V Typical value:24V@2A
| Linear order. | نام پین | تعریف رابط | توصیف رابط | Signal direction |
| 1,2,3,4 | GND | زمین | زمین | |
| 5 | 422آ | Serial port 3 RS-422 | Receiving data RX+ | من |
| 6 | 422B | Receiving data RX- | من | |
| 7 | 422ز | Transmitting data TX- | O | |
| 8 | 422و | Transmitting data TX+ | O | |
| 9 | txd_a | Serial port 1 RS232/TTL | Transmitting data TX | O |
| 10 | rxd_a | Receiving data RX | من | |
| 11 | TXD_B | Serial port 2 RS232/TTL | Transmitting data TX | O |
| 12 | RXD_B | Receiving data RX | من | |
| 13 | GND | درگاه سریال 2 زمین | O | |
| 14 | SBUS /TTL TX | Serial port 4 SBUS/TTL | SBUS/TTL sending | O |
| 15 | SBUS /TTL RX | SBUS/TTL receiving | من | |
| 16 | SBUS/TTL GND | SBUS/TTL ground | O | |
| 17 | tx1p+ | پورت شبکه 1 | Transmitting data TX+ | O |
| 18 | TX1M- | Transmitting data TX- | O | |
| 19 | rx1p+ | Receiving data RX+ | من | |
| 20 | RX1M- | Receiving data RX- | من | |
| 21 | GND | زمین | درگاه سریال 1 زمین | O |
| 22 | TX2P+ | پورت شبکه 2 | Transmitting data TX+ | O |
| 23 | TX2M- | Transmitting data TX- | O | |
| 24 | RX2P+ | Receiving data RX+ | من | |
| 25 | RX2M- | Receiving data RX- | من |
- توجه داشته باشید 1: Signal direction I indicates radio input and direction O indicates radio output.
- توجه داشته باشید 2: When using the serial port 1/2 of the device, please check whether it is TTL level or RS232 level.
منndicator Meaning
POWER LIGHT PWR （سبز
وقتی چراغ PWR روشن است, دستگاه روشن است.
SYNC（green）
Out of sync state, light flashing.
After synchronization, 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 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 ماژول | حالت | Vcan1933-8W light status | |||
| پیدایش | همگام سازی | شبکه محلی 1 LAN 2 | RSSI 123 | ||
| استاد | Un-sync | روشن شد | چشمگیر | Data sending and receiving, چشمک زن | خاموش |
| استاد | همگام سازی | روشن شد | Steady on | Data sending and receiving, چشمک زن | Proportional to the strength of the received signal |
| برده | Un-sync | روشن شد | چشمگیر | Data sending and receiving, چشمک زن | جستجو |
| برده | همگام سازی | روشن شد | Steady on | Data sending and receiving, چشمک زن | 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. هنگامی که درگاه شبکه در حال ارسال یا دریافت داده است, the master and slave devices correspond to LAN1, and the LAN2 indicator blinks.
More information about the product
TDD (دوتایی تقسیم زمان) is a communication technique used in wireless systems where the uplink (transmitting data from the ground control station to the drone) و لینک پایین (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) و لینک پایین (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 (به عنوان مثال, video streaming).
Comparison Between TDD and FDD
| ویژگی | 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 | بله, supports advanced techniques like beamforming | خیر |
| دخالت | 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.
محدودیت های قدرت و اندازه:
- 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.
سیستم آنتن:
- On Drone: Fiberglass omnidirectional or small directional patch antennas.
- ایستگاه زمینی: High-gain parabolic, Yagi antennas or flat panel antennas with tracking systems برای ارتباط دوربرد.
برنامه های کاربردی
- نظارت و امنیت: Real-time video streaming from drones for law enforcement or border control.
- صدا و سیما: High-definition aerial footage for live events or media.
- کشاورزی: Monitoring crops and livestock over vast areas.
- پاسخ فاجعه: Sending live video from disaster sites for better coordination.
این دامنه انتقال of an 8-watt power amplifier (PA) depends on a variety of factors, شامل:
- باند فرکانس: Higher frequencies experience more signal loss over distance (higher free-space path loss).
- آنتن: The type and gain of the antenna at both ends (فرستنده و گیرنده) significantly impact the range.
- شرایط زیست محیطی: Factors like terrain, ساختمان ها, هوا (باران, مه), و خط دید (LoS) can affect range.
- Modulation Scheme and Data Rate: More complex modulation schemes (به عنوان مثال, QAM) and higher data rates may reduce effective range due to higher sensitivity to signal degradation.
- حساسیت گیرنده: The ability of the receiver to detect a weak signal at a specific distance.
سوال بپرسید
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