תוכן העניינים
100km TDD bidirectional video data wireless transmission Appearance
היסטוריה של גרסאות
| תַאֲרִיך | גִרְסָה | תיאור שינוי |
| 20231219 | V1.0 | גרסה ראשונית |
| 20240315 | V2.0 | Modify the weight dimensions, modify the total data in Table MCS & רגיש |
| 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 |
סקירה כללית
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, בחירת תדרים אדפטיבית, זרם אדפטיבי, העברה מחדש אוטומטית, and automatic power control, מה שמשפר מאוד את היכולת של אנטי-מורטיפת ואנטי-אינטרפורמציה, ויש לו את המאפיינים של אמינות גבוהה, יציבות טובה, ועיכוב נמוך.
מוצר זה מתאים לכיבוי אש, בְּדִיקָה, ניטור, ותרחישים נוספים, 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: Up to 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: Automatic detection of interference signals, real time selection of the optimal frequency point.
- Supports automatic retransmission: Automatic retransmission of burst error data improves data reliability.
- Supports adaptive stream: 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.
- תומך בבחירת אנטנה אוטומטית: לפי מצב החסימה, the optimal antenna transmission is selected in real time.
- Supports the coexistence of multiple set: תמיכה עד 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.
מִפרָט
| פרמטר מערכת | אינדקס טכני |
| Equipment model | VCAN1933-8W |
| תדירות עבודה | 1350~ 1470MHz |
| תדר רדיו | 2T2R |
| כוח הילוכים | 39dBm (8-וואט PA) |
| מרחק הילוכים | 100KM (LOS אוויר-קרקע) |
| רוחב פס בערוץ | 10MHz |
| מצב אפנון | QPSK/16QAM |
| קבלת רגישות | ראה טבלה (MCS & רגיש) |
| מְהִירוּת | 17Mbps@16QAM3/4 |
| הצפנת תקשורת | AES256 |
| עיכוב שידור | ≤10ms |
| ממשק תדר רדיו | SMA*2 |
| Equipment interface | XT30PW-M |
| Equipment interface | 100Mbps Ethernet*2 |
| TTL/RS232*2 | |
| RS422*1 | |
| SBUS/TTL*1 | |
| צריכת חשמל כוללת | ≤48W@4Mbps(Air uint) |
| ≤12W@1Mbps(Ground uint) | |
| מֵמַד(L * W * H) | 163*77*25מ"מ |
| מִשׁקָל | 340g |
| מתח עבודה | DC22~30V,ערך אופייני: +24V@2A |
| טמפרטורת עבודה | -40~+75℃ |
| MCS & רגיש (10MHz) | |||
| No. | MCS | Total uplink and downlink throughput (Mbps) | רגיש (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 |
Product dimension and weight
תרשים מימד
מימד ומשקל
- מֵמַד (L * W * H): 163mm*77mm*25mm(כולל SMA 10 מ"מ)
- מִשׁקָל : 340g
הגדרת ממשק מוצר
דיאגרמת ממשק
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.
הגדרת ממשק
ממשק כוח: XT30PW-M. טווח אספקת חשמל: DC22-30V Typical value:24V@2A
| Linear order. | שם סיכה | הגדרת ממשק | תיאור ממשק | Signal direction |
| 1,2,3,4 | GND | קרקע, אדמה | קרקע, אדמה | |
| 5 | 422א | Serial port 3 RS-422 | Receiving data RX+ | אני |
| 6 | 422B | Receiving data RX- | אני | |
| 7 | 422מ | Transmitting data TX- | O | |
| 8 | 422וזה | Transmitting data TX+ | O | |
| 9 | TXD_A | Serial port 1 RS232/TTL | Transmitting data TX | O |
| 10 | RXD_A | Receiving data RX | אני | |
| 11 | TXD_B | Serial port 2 RS232/TTL | Transmitting data TX | O |
| 12 | Rxd_b | Receiving data RX | אני | |
| 13 | GND | יציאה טורית 2 קרקע, אדמה | O | |
| 14 | SBUS /TTL TX | Serial port 4 SBUS/TTL | SBUS/TTL sending | O |
| 15 | SBUS /TTL RX | SBUS/TTL receiving | אני | |
| 16 | SBUS/TTL GND | SBUS/TTL ground | O | |
| 17 | TX1P+ | יציאת רשת 1 | Transmitting data TX+ | O |
| 18 | TX1M- | Transmitting data TX- | O | |
| 19 | Rx1p+ | Receiving data RX+ | אני | |
| 20 | RX1M- | Receiving data RX- | אני | |
| 21 | GND | קרקע, אדמה | יציאה טורית 1 קרקע, אדמה | O |
| 22 | TX2P+ | יציאת רשת 2 | Transmitting data TX+ | O |
| 23 | TX2M- | Transmitting data TX- | O | |
| 24 | Rx2p+ | Receiving data RX+ | אני | |
| 25 | RX2M- | Receiving data RX- | אני |
- הערה 1: Signal direction I indicates radio input and direction O indicates radio output.
- הערה 2: When using the serial port 1/2 of the device, please check whether it is TTL level or RS232 level.
אניndicator Meaning
אור כוח PWR ≠ ירוק）
כאשר אור ה- PWR פועל, המכשיר מופעל.
SYNC（green）
Out of sync state, light flashing.
לאחר סנכרון, 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 אורות ירוקים)
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 | קיבל אנרגיה DBM |
| 3 RSSI lights on | about -50dBm |
| 2 RSSI lights on | about -80dBm |
| 1 RSSI light on | about -95dBm |
| סוג מודול | מצב | Vcan1933-8W light status | |||
| PWR | סינכרון | LAN 1 LAN 2 | RSSI 123 | ||
| לִשְׁלוֹט | Un-sync | מופעל | הַברָקָה | Data sending and receiving, הַברָקָה | כבוי |
| לִשְׁלוֹט | Sync | מופעל | Steady on | Data sending and receiving, הַברָקָה | Proportional to the strength of the received signal |
| עֶבֶד | Un-sync | מופעל | הַברָקָה | Data sending and receiving, הַברָקָה | מחפש |
| עֶבֶד | Sync | מופעל | Steady on | Data sending and receiving, הַברָקָה | 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. כאשר יציאת הרשת שולחת או מקבלת נתונים, the master and slave devices correspond to LAN1, and the LAN2 indicator blinks.
More information about the product
TDD (חטיבת זמן דופלקסינג) is a communication technique used in wireless systems where the uplink (transmitting data from the ground control station to the drone) ו-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) ו-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 (לְמָשָׁל, הזרמת וידאו).
Comparison Between TDD and FDD
| מאפיין | 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 | כן, supports advanced techniques like beamforming | לא |
| הַפרָעָה | 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.
מגבלות כוח וגודל:
- 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.
מערכת אנטנה:
- On Drone: Fiberglass omnidirectional or small directional patch antennas.
- תחנת קרקע: High-gain parabolic, Yagi antennas or flat panel antennas with tracking systems לתקשורת ארוכת טווח.
אפליקציות
- מעקב וביטחון: Real-time video streaming from drones for law enforcement or border control.
- שידור: High-definition aerial footage for live events or media.
- חַקלָאוּת: Monitoring crops and livestock over vast areas.
- תגובת אסון: Sending live video from disaster sites for better coordination.
ה טווח שידור of an 8-watt power amplifier (הרשות הפלסטינית) depends on a variety of factors, לְרַבּוֹת:
- תחום תדרים: Higher frequencies experience more signal loss over distance (higher free-space path loss).
- שבח אנטנה: The type and gain of the antenna at both ends (משדר ומקלט) significantly impact the range.
- תנאים סביבתיים: Factors like terrain, מבנים, מֶזֶג אֲוִיר (גֶשֶׁם, עֲרָפֶל), וקו ראייה (לוס) can affect range.
- Modulation Scheme and Data Rate: More complex modulation schemes (לְמָשָׁל, QAM) and higher data rates may reduce effective range due to higher sensitivity to signal degradation.
- רגישות למקלט: The ability of the receiver to detect a weak signal at a specific distance.
שאל שאלה
תודה רבה ששלחת את התשובה! ✨