COFDM IP wireless data transmitter module

COFDM IP wireless video data transmitter module One-way Ethernet transparent transmission network port Vcan1816

1. Common cofdm transmitters are video signal inputs such as HDMI, CVBS, SDI, or AHD. This one is a transparent transmission module that can support IP cameras and support video and data through cofdm.
2. Paired with this COFDM network video data transmitter is a COFDM receiving module, which can realize HDMI and CVBS output, and can also output video to a computer, RTSP, or UDP player through an IP network port RJ45.
3. The key role is to use UDP broadcast/multicast to send data.

1. COFDM wireless transmission module + receive the module, forming a one-way wireless transmission network port transmission link
2. The transmitting module receives data through the network port and transmits the data received by the network port in the form of COFDM
3. After receiving the data, the receiver receives the demodulation and then outputs it through the network port

Unidirectional COFDM network port wireless transmission module function:

Features

• The host computer data is received through the network port, and then the network port data is transmitted.
• Data input: Network port, support protocol UDP broadcast/multicast. Physical interface: RJ45 seat or 4PIN 1.25mm pitch seat
• CFG-UART: COFDM modulation parameter configuration serial port, 4PIN 1.25mm pitch seat, can be docked to our parameter configuration panel. Users can set the center operating frequency point, wireless bandwidth, and other modulation parameters (such as protection interval, convolution bitrate, constellation mode, transmission gain, etc.) through the reference serial port.
• COFDM Transmitter Interface (Tx): MMCX female.
• TF card interface, software upgrade, and maintenance.
• Power input interface (Power): 2PIN 2.0mm pitch Phoenix terminal. Supply voltage: 7V~24V.
• Link LED indicator: The light of the work is emitted, and the data is flashed when the data is transmitted usually.
• Power LED indicator: The power input indicator, the normal power supply is always on.
• Transmitter module size: 73x51mm (excluding the size of interface devices and connectors protruding from the board edge), thickness less than 15mm.
• Supported COFDM modulation parameters:
• Configurable convolutional encoding ratios: 1/2, 2/3, 3/4, 5/6, 7/8
• Configurable constellation: QPSK/QAM16/QAM64
• IFFT mode: 2K
• Configurable protection intervals: 1/4, 1/8, 1/16, 1/32
• Wireless bandwidth: 1 ~ 8MHz MHz adjustable, 1KHz step
• Configurable RF output power: -94dbm ~ -5dbm (different operating frequency points, the maximum transmit power is different).
• Center operating frequency point: between 200MHz ~ and 2300MHz can be configured arbitrarily

COFDM wireless transmission system transmission rate calculation

Wireless transmission rate (air interface rate):

Rate(MBps) = (BandWidth(MHz) * 8.0/7.0) / (1+GI) * 1512/2048*log2(constellation point) * code_rate * 188/204.

Take the 8MHz bandwidth as an example of different protection intervals, convolutional bitrates, data rates corresponding to constellations, and the required received signal-to-noise ratio:

UART AT Command

ATDR、ATSD、ATSG、ATSM、ATGD、ATSR、ATGR、ATGB is useful

For the UART AT command operation and format, please check the below link.

Encoder Modulator Decoder Demodulator Module Parameter Configuration Instructions COFDM AT Command

Receiver Module

Suggestions

1. This is a one-way unidirectional transmission system. if you need a two-way bidirectional transmission system, please check this link. https://ivcan.com/t/two-ways/ or https://ivcan.com/ru/p/mini-cofdm-wireless-ethernet-transmission-module-rj45/
2. This is only a data transmission system, if you need video+data transmission, please look details of these modules, https://ivcan.com/p/modulator-demodulator-module-encoder-decoder-hdmi-cvbs/
3. If you need a relay (repeater) to support a longer transmission range (distances), please choose stronger PA (Power Amplifier) inside, for example, change 1Watts PA to 2.5 Watts or 5 Watts.

–160MHz~860MHz HD video COFDM receiver module with HDMI/AV/Ethernet/USB output

The COFDM receiver module is a compact digital diversity receiver with integrated H.264 decoding, suitable for use in fluid and high-mobility applications. The receiver module accepts signals from two antennas to significantly enhance the demodulated performance and increase the operating range. The receiver module can find and lock automatically to the incoming transmission quickly according to the pre-set frequency and bandwidth. This receiver module features a range of comprehensive signal outputs including HD at 720p and 1080P, down-converted HD CVBS monitor video, and two analog audios supported.

The receiver module also includes DVR record functionality with a Micro SD card or USB disk. Additionally, the receiver module has a built-in RTSP server that enables video streaming over Ethernet for remote software or hardware decoders. And the receiver module also enables video streaming over USB for remote Android device decoders like smartphones or Android PAD. This allows multiple remote viewers to monitor the same video simultaneously. The receiver module also supports display characters string on the video display screen with the video together in OSD mode.

When paired with the Our COFDM transmitter module, the receiver module offers a comprehensive, rapidly-deployable video and audio solution that enables advanced situational awareness. It can play an essential role in delivering real-time live video from both ground and airborne mobile platforms.

• COFDM demodulation and H.264 video decoder;
• Full HD resolution, 1080P@60fps;
• Great security by AES decryption;
• DVR record with Micro SD card or USB disk;
• Built-in RTSP server enables video streaming over Ethernet;
• Enables video streaming over a USB host for the remote device;
• Supports display characters string on the video display screen in OSD mode;
• Stable signal transfer in NLOS and high-speed moving;
• Adjustable working frequency, and bandwidth.

Specification:

IO

Demodulation

RF

Video and Audio

Monitoring and control

Comprehensive receiver setup with Our Config Panel or Windows PC or other devices via control UART.

Temperature range

Full specification: 0° to +70°C Ambient

Storage: –40° to +80°C

Physical Characteristics

Board Dimensions: 80.4*50.8mm

Power requirements

Input range: 9~24VDC

Power consumption: <300mA@12V

IO Signals

Keys + LEDs:

The receiver module has a 2*5PIN PH2.0mm connector which provides “keys + LEDs” signals. It is designed for customers who want to expand LEDs and keys to their cases.

PWR led signal: this two-pin can connect to an led for the power indicator, and constant light when the device is normally powered.

The link led signal: this two-pin can connect to an led for a wireless link indicator, which blinks when the video stream is received.

REC led signal: this two-pin can connect to an led for a record indicator, and constant light when video recording.

REC key signal: this two-pin can connect to a button for the switch of video recording, and a short press to change its status. The receiver will automatically check the storage device(micro SD card or USB disk) after powering on and start to record video when the storage device is inserted. Just press it to stop or record again.

OSD key: this two-pin can connect to a button for turning on/off the status of the OSD displaying, long press it to switch(more than 1s). The status will be kept after a reboot. When the OSD status is on without any OSD data input from the data uart, the device will display information on the video screen as:

RF：338.0MHz BW：4.0MHz ; RF, working frequency; BW, bandwidth

QPSK CR：2/3 GI：1/16 ; Constellation, FEC, Guard interval

AIR：3.90Mbps ; AIR, wireless transmitting bitrates

VBR：3.05Mbps AES OFF ; VBR, video bitrates; AES OFF, AES encryption turned off.

SIG1：27 SIG2：22 ; SIG1, the signal intensity of antenna 1; SIG2, the signal intensity of antenna 2

ber1：0.14% ber2：100.00% ; ber1, bit error rate of antenna 1; ber2, bit error rate of antenna 2

REC OFF No Storage ; video recording status

Paired with COFDM transmitter:

The default normal features of the two-antenna Wireless receiver module can be paired with all of Our H.264 transmitter modules. The HD video latency from its inputting of the transmitter to the HDMI screen displaying of the receiver is about 200~250ms.

Our two-antenna COFDM Wireless Receiver module can also be paired with our COFDM transmitter module for the lowest video latency application when manufactured with specified firmware. The specified firmware enables proprietary H.264 video compression/decompression only using p-frames for the lowest latency. The video latency from its inputting of the transmitter to the HDMI screen displaying of the receiver is about 50ms to 130ms.

How to test COFDM IP wireless video data transmitter module?

ethernet modem in one way