विषयसूची
100km TDD bidirectional video data wireless transmission Appearance
संस्करण इतिहास
| तारीख | संस्करण | संशोधन विवरण |
| 20231219 | वी1.0 | प्रारंभिक संस्करण |
| 20240315 | V2.0 | Modify the weight dimensions, modify the total data in Table MCS & संवेदनशीलता |
| 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 |
अवलोकन
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, अनुकूली आवृत्ति चयन, अनुकूली धारा, स्वचालित पुन:संचरण, and automatic power control, जो एंटी-मल्टीपाथ और एंटी-इंटरफेरेंस की क्षमता में काफी सुधार करता है, और इसमें उच्च विश्वसनीयता की विशेषताएं हैं, अच्छी स्थिरता, और कम विलंब.
यह उत्पाद अग्निशमन के लिए उपयुक्त है, निरीक्षण, निगरानी, और अन्य परिदृश्य, 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: 17Mbps@10MHz तक.
- 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: हस्तक्षेप संकेतों का स्वचालित पता लगाना, real time selection of the optimal frequency point.
- स्वचालित रीट्रांसमिशन का समर्थन करता है: Automatic retransmission of burst error data improves data reliability.
- अनुकूली धारा का समर्थन करता है: The channel modulation mode is automatically adjusted according to the signal quality in real time.
- स्वचालित बिजली नियंत्रण का समर्थन करता है: Close range automatic adjustment of transmission power, बिजली की खपत कम करें.
- स्वचालित एंटीना चयन का समर्थन करता है: रोड़ा स्थिति के अनुसार, the optimal antenna transmission is selected in real time.
- Supports the coexistence of multiple set: तक का समर्थन 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.
विशिष्टता
| सिस्टम पैरामीटर | तकनीकी सूचकांक |
| Equipment model | Vcan1933-8w |
| कार्य आवृत्ति | 1350~1470 मेगाहर्ट्ज |
| आकाशवाणी आवृति | 2T2R |
| संचरण शक्ति | 39dBm (8-वत्स पीए) |
| संचरण दूरी | 100के.एम. (एयर-टू-ग्राउंड लॉस) |
| चैनल बैंडविड्थ | 10मेगाहर्ट्ज |
| मॉड्यूलेशन मोड | क्यूपीएसके/16क्यूएएम |
| संवेदनशीलता प्राप्त करना | तालिका देखें (एमसीएस & संवेदनशीलता) |
| गति | 17Mbps@16QAM3/4 |
| संचार एन्क्रिप्शन | ऑडियो कोडिंग |
| ट्रांसमिशन देरी | ≤10ms |
| रेडियो फ्रीक्वेंसी इंटरफ़ेस | एसएमए*2 |
| Equipment interface | XT30PW-एम |
| Equipment interface | 100Mbps Ethernet*2 |
| टीटीएल/आरएस232*2 | |
| आरएस422*1 | |
| एसबीयूएस/टीटीएल*1 | |
| कुल बिजली की खपत | ≤48W@4Mbps(Air uint) |
| ≤12W@1Mbps(Ground uint) | |
| आयाम(एल * डब्ल्यू * एच) | 163*77*25मिमी |
| वजन | 340जी |
| कार्यरत वोल्टेज | DC22~30V,विशिष्ट मूल्य: +24V@2A |
| वर्किंग टेम्परेचर | -40~+75℃ |
| एमसीएस & संवेदनशीलता (10मेगाहर्ट्ज) | |||
| No. | एमसीएस | Total uplink and downlink throughput (एमबीपीएस) | संवेदनशीलता (dBm) |
| 1 | क्यूपीएसके1/3 | 4.0 | -99 |
| 2 | क्यूपीएसके1/2 | 5.8 | -98 |
| 3 | क्यूपीएसके2/3 | 7.1 | -97 |
| 4 | क्यूपीएसके3/4 | 8.2 | -96 |
| 5 | 16QAM1/3 | 8.0 | -96 |
| 6 | 16QAM1/2 | 11.6 | -95 |
| 7 | 16QAM2/3 | 14.3 | -93 |
| 8 | 16QAM3/4 | 16.4 | -91 |
पीroduct dimension and weight
आयाम आरेख
आयाम और वजन
- आयाम (एल * डब्ल्यू * एच): 163mm*77mm*25mm(एसएमए 10 मिमी सहित)
- वजन : 340जी
उत्पाद इंटरफ़ेस परिभाषा
इंटरफ़ेस आरेख
The interface of the Vcan1933-8W device includes the XT30PW-M power interface and J30J-25pin data interface. The interface has RS232/TTL*2, आरएस422*1, SBUS/TTL*1 and 100 Mbit/s Ethernet*2.
इंटरफ़ेस परिभाषा
पावर इंटरफ़ेस: XT30PW-एम. विद्युत आपूर्ति रेंज: DC22-30V Typical value:24V@2A
| Linear order. | पिन नाम | इंटरफ़ेस परिभाषा | इंटरफ़ेस विवरण | Signal direction |
| 1,2,3,4 | GND | ज़मीन | ज़मीन | |
| 5 | 422ए | Serial port 3 RS-422 | Receiving data RX+ | मैं |
| 6 | 422बी | Receiving data RX- | मैं | |
| 7 | 422जेड | Transmitting data TX- | O | |
| 8 | 422और | Transmitting data TX+ | O | |
| 9 | TXD_A | Serial port 1 RS232/TTL | Transmitting data TX | O |
| 10 | RXD_A | Receiving data RX | मैं | |
| 11 | TXD_B | Serial port 2 RS232/TTL | Transmitting data TX | O |
| 12 | RXD_B | Receiving data RX | मैं | |
| 13 | GND | सीरियल पोर्ट 2 ज़मीन | O | |
| 14 | SBUS /TTL TX | Serial port 4 SBUS/TTL | SBUS/TTL sending | O |
| 15 | SBUS /TTL RX | SBUS/TTL receiving | मैं | |
| 16 | SBUS/TTL GND | SBUS/TTL ground | O | |
| 17 | TX1P+ | नेटवर्क पोर्ट 1 | Transmitting data TX+ | O |
| 18 | TX1M- | Transmitting data TX- | O | |
| 19 | RX1P+ | Receiving data RX+ | मैं | |
| 20 | RX1M- | Receiving data RX- | मैं | |
| 21 | GND | ज़मीन | सीरियल पोर्ट 1 ज़मीन | O |
| 22 | TX2P+ | नेटवर्क पोर्ट 2 | Transmitting data TX+ | O |
| 23 | TX2M- | Transmitting data TX- | O | |
| 24 | RX2P+ | Receiving data RX+ | मैं | |
| 25 | RX2M- | Receiving data RX- | मैं |
- ध्यान दें 1: Signal direction I indicates radio input and direction O indicates radio output.
- ध्यान दें 2: When using the serial port 1/2 of the device, please check whether it is TTL level or RS232 level.
मैंndicator Meaning
पावर लाइट पीडब्लूआर (हरा)
जब पीडब्लूआर लाइट चालू हो, डिवाइस चालू है.
SYNC（green）
Out of sync state, light flashing.
सिंक्रनाइज़ेशन के बाद, 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(आरएसएसआई 3 हरी बत्तियाँ)
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 | प्राप्त ऊर्जा dBm |
| 3 RSSI lights on | about -50dBm |
| 2 RSSI lights on | about -80dBm |
| 1 RSSI light on | about -95dBm |
| मॉड्यूल प्रकार | मोड | Vcan1933-8W light status | |||
| पीडब्लूआर | साथ-साथ करना | लैन 1 LAN 2 | आरएसएसआई 123 | ||
| गुरुजी | Un-sync | पर संचालित | चमकता | Data sending and receiving, चमकता | बंद |
| गुरुजी | Sync | पर संचालित | Steady on | Data sending and receiving, चमकता | Proportional to the strength of the received signal |
| गुलाम | Un-sync | पर संचालित | चमकता | Data sending and receiving, चमकता | खोज रहे हैं |
| गुलाम | Sync | पर संचालित | Steady on | Data sending and receiving, चमकता | 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. जब नेटवर्क पोर्ट डेटा भेज या प्राप्त कर रहा हो, the master and slave devices correspond to LAN1, and the LAN2 indicator blinks.
More information about the product
TDD (समय विभाजन डुप्लेक्सिंग) is a communication technique used in wireless systems where the uplink (transmitting data from the ground control station to the drone) और डाउनलिंक (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) और डाउनलिंक (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 (जैसे, वीडियो स्ट्रीमिंग).
Comparison Between TDD and FDD
| फ़ीचर | 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 | हाँ, supports advanced techniques like beamforming | नहीं |
| दखल अंदाजी | 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.
शक्ति और आकार की बाधाएँ:
- 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.
एंटीना प्रणाली:
- On Drone: Fiberglass omnidirectional or small directional patch antennas.
- भूमि स्टेशन: High-gain parabolic, Yagi antennas or flat panel antennas with tracking systems लंबी दूरी के संचार के लिए.
अनुप्रयोगों
- निगरानी एवं सुरक्षा: Real-time video streaming from drones for law enforcement or border control.
- प्रसारण: High-definition aerial footage for live events or media.
- कृषि: Monitoring crops and livestock over vast areas.
- आपदा प्रतिक्रिया: Sending live video from disaster sites for better coordination.
NS ट्रांसमिशन रेंज of an 8-watt power amplifier (देहात) depends on a variety of factors, समेत:
- आवर्त्त पट्टी: Higher frequencies experience more signal loss over distance (higher free-space path loss).
- एंटीना लाभ: The type and gain of the antenna at both ends (ट्रांसमीटर और रिसीवर) significantly impact the range.
- पर्यावरणीय स्थितियाँ: Factors like terrain, इमारतों, मौसम (बारिश, कोहरा), और दृष्टि रेखा (LoS) can affect range.
- Modulation Scheme and Data Rate: More complex modulation schemes (जैसे, QAM) and higher data rates may reduce effective range due to higher sensitivity to signal degradation.
- रिसीवर संवेदनशीलता: The ability of the receiver to detect a weak signal at a specific distance.
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