100km TDD bidirectionele draadloze transmissie van videogegevens

100km TDD bidirectional video data wireless transmission Appearance

Versiegeschiedenis

Datum	Versie	Wijzigingsbeschrijving
20231219	V1.0	Eerste versie
20240315	V2.0	Modify the weight dimensions, modify the total data in Table MCS & Gevoeligheid
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

Overzicht

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, adaptieve frequentieselectie, adaptieve stroom, Automatische hertransmissie, and automatic power control, wat het vermogen van anti-multipaat en anti-interferentie aanzienlijk verbetert, en heeft de kenmerken van een hoge betrouwbaarheid, goede stabiliteit, en lage vertraging.

Dit product is geschikt voor brandbestrijding, inspectie, toezicht houden, en andere scenario's,  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: Tot 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: Automatische detectie van stoorsignalen, real time selection of the optimal frequency point.
• Ondersteunt automatische hertransmissie: Automatic retransmission of burst error data improves data reliability.
• Ondersteunt adaptieve stream: The channel modulation mode is automatically adjusted according to the signal quality in real time.
• Ondersteunt automatische vermogensregeling: Close range automatic adjustment of transmission power, het stroomverbruik verminderen.
• Ondersteunt automatische antenneselectie: Volgens de occlusiesituatie, the optimal antenna transmission is selected in real time.
• Supports the coexistence of multiple set: Ondersteuning tot 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.

Specificatie

Systeemparameter	Technische index
Equipment model	VCAN1933-8W
werken frequentie	1350~ 1470MHz
Radiofrequentie	2T2R
Zendvermogen:	39dBm (8-watt PA)
transmissie afstand	100KM (Lucht-grond LOS)
Kanaalbandbreedte	10MHz
modulatie modus	QPSK/16QAM
Gevoeligheid ontvangen	Zie tabel (MCS & Gevoeligheid)
Snelheid	17Mbps@16QAM3/4
Communicatie-encryptie	Andere reeksen beschikbaar van 200~860MHz
Verzendvertraging	≤10 ms
Radiofrequentie -interface	SMA*2
Equipment interface	XT30PW-M
Equipment interface	100Mbps Ethernet*2
	TTL/RS232*2
	RS422*1
	SBUS/TTL*1
Algemeen stroomverbruik	≤48W@4Mbps(Air uint)
	≤12W@1Mbps(Ground uint)
Dimensie(L * B * H)	163*77*25mm
Gewicht	340g
Werken voltage	DC22~30V,Typische waarde: +24V@2A
Werktemperatuur	-40~+75℃

MCS & Gevoeligheid (10MHz)
No.	MCS	Total uplink and downlink throughput (Mbps)	Gevoeligheid (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	16QAM3/4	16.4	-91

Product dimension and weight

Afmetingsdiagram

Afmeting en gewicht

• Dimensie (L * B * H): 163mm*77mm*25mm(inclusief SMA 10mm)
• Gewicht : 340g

Definitie van productinterface

Interfacediagram

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.

Interfacedefinitie

Voedingsinterface: XT30PW-M. Voedingsspanningsbereik: DC22-30V Typical value:24V@2A

Linear order.	Speld naam	Interfacedefinitie	Interfacebeschrijving	Signal direction
1,2,3,4	GND	Grond	Grond
5	422EEN	Serial port 3 RS-422	Receiving data RX+	ik
6	422B		Receiving data RX-	ik
7	422Z		Transmitting data TX-	de
8	422en		Transmitting data TX+	de
9	TXD_A	Serial port 1 RS232/TTL	Transmitting data TX	de
10	RXD_A		Receiving data RX	ik
11	TXD_B	Serial port 2 RS232/TTL	Transmitting data TX	de
12	RXD_B		Receiving data RX	ik
13	GND		seriële poort 2 grond	de
14	SBUS /TTL TX	Serial port 4 SBUS/TTL	SBUS/TTL sending	de
15	SBUS /TTL RX		SBUS/TTL receiving	ik
16	SBUS/TTL GND		SBUS/TTL ground	de
17	TX1P+	netwerkpoort 1	Transmitting data TX+	de
18	TX1M-		Transmitting data TX-	de
19	RX1P+		Receiving data RX+	ik
20	RX1M-		Receiving data RX-	ik
21	GND	Grond	seriële poort 1 grond	de
22	TX2P+	netwerkpoort 2	Transmitting data TX+	de
23	TX2M-		Transmitting data TX-	de
24	RX2P+		Receiving data RX+	ik
25	RX2M-		Receiving data RX-	ik

• Notitie 1: Signal direction I indicates radio input and direction O indicates radio output.
• Notitie 2: When using the serial port 1/2 of the device, please check whether it is TTL level or RS232 level.

ikndicator Meaning

The RSSI light represents the strength of the received signal
Number of RSSI energy lights on	Energie DBM ontvangen
3 RSSI lights on	about -50dBm
2 RSSI lights on	about -80dBm
1 RSSI light on	about -95dBm

Moduletype	mode	Vcan1933-8W light status
		PWR	SYNCHRONISEREN	LAN 1 LAN 2	RSSI 123
meester	Un-sync	Aangezet	Knipperend	Data sending and receiving, knipperend	Uit
meester	Synchroniseren	Aangezet	Steady on	Data sending and receiving, knipperend	Proportional to the strength of the received signal
slaaf	Un-sync	Aangezet	Knipperend	Data sending and receiving, knipperend	Zoeken
slaaf	Synchroniseren	Aangezet	Steady on	Data sending and receiving, knipperend	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. Wanneer de netwerkpoort gegevens verzendt of ontvangt, the master and slave devices correspond to LAN1, and the LAN2 indicator blinks.

More information about the product

TDD (Tijdafdeling Duplexing) is a communication technique used in wireless systems where the uplink (transmitting data from the ground control station to the drone) en 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) en 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 (Bijv., Video streaming).

Comparison Between TDD and FDD

Kenmerk	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	Ja, supports advanced techniques like beamforming	Nee
Interferentie	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.

Machts- en groottebeperkingen:

• 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.

Antennesysteem:

• On Drone: Fiberglass omnidirectional or small directional patch antennas.
• Grondstation: High-gain parabolic, Yagi antennas or flat panel antennas with tracking systems voor langeafstandscommunicatie.

toepassingen

1. Toezicht en beveiliging: Real-time video streaming from drones for law enforcement or border control.
2. Uitzending: High-definition aerial footage for live events or media.
3. Landbouw: Monitoring crops and livestock over vast areas.
4. Ramp -reactie: Sending live video from disaster sites for better coordination.

De transmissiebereik of an 8-watt power amplifier (VADER) depends on a variety of factors, inclusief:

1. frequentieband: Higher frequencies experience more signal loss over distance (higher free-space path loss).
2. antenne Gain: The type and gain of the antenna at both ends (zender en ontvanger) significantly impact the range.
3. Omgevingsomstandigheden: Factors like terrain, gebouwen, weer (regen, mist), en zichtlijn (Los) can affect range.
4. Modulation Scheme and Data Rate: More complex modulation schemes (Bijv., QAM) and higher data rates may reduce effective range due to higher sensitivity to signal degradation.
5. Gevoeligheid van de ontvanger: The ability of the receiver to detect a weak signal at a specific distance.