400 MHz – 8 GHz RF Direct-Sampling Software Defined Radio Board 8T8R+2FB PCIe x8

The SDR KTR08 V2.1.0 is a high-performance Software Defined Radio (SDR) core board built on an RF direct-sampling architecture. Equipped with a Xilinx XCKU5P high-performance FPGA as the main processor and an integrated TR8165 RF transceiver (8T8R + 2FB), the board delivers ultra-wide frequency coverage from 400 MHz to 8000 MHz. It is suitable for a wide range of applications including electronic warfare, radar signal processing, communications reconnaissance and jamming, and spectrum monitoring.

The V2.1.0 release introduces a hardware upgrade over the previous design: the optical module has been removed and the released SerDes resources have been reallocated to expand the PCIe interface from x4 to x8. The board provides 18 RF ports, a J30J-100 expansion connector, a USB 3.0 high-speed interface, and comprehensive status indicators and user buttons, meeting diverse system integration and secondary development requirements.

The board supports 8-channel simultaneous reception with full coverage of the 400 MHz to 8000 MHz ultra-wide frequency band. The maximum ADC sampling rate reaches 6 GS/s; the maximum single-channel RF bandwidth is 800 MHz, and in 4-channel parallel mode the total instantaneous bandwidth can be extended to 1600 MHz, meeting real-time full-band interception requirements for wideband electromagnetic signals.

With a high-sensitivity RF front-end design, the board can rapidly intercept and digitize complex modulated signals such as frequency-hopping, spread-spectrum, and burst communications with low distortion, providing high-fidelity raw data for subsequent signal analysis, identification, and jamming decisions, and ensuring the timeliness and accuracy of reconnaissance.

With 8-channel simultaneous transceive, 400 MHz to 8000 MHz ultra-wide frequency coverage, and up to 6 GS/s ADC sampling rate, the board enables full-band real-time interception and high-fidelity digitization of wideband electromagnetic signals, providing high-quality raw data for subsequent signal analysis, identification, and jamming decision-making.

This RF direct-sampling SDR core board can be applied to electronic warfare, radar, communications, and other scenarios. Leveraging its high-performance hardware architecture and next-generation TR8165 RF direct-sampling technology, it provides a high-speed, accurate, and low-power RF data processing solution for electronic reconnaissance, suppression jamming, and signal deception.

The board adopts an "RF direct-sampling + FPGA real-time processing" architecture, composed of the following functional modules:

• Main Processor FPGA — Xilinx XCKU5P high-performance FPGA, responsible for real-time signal processing, protocol analysis, and system control
• RF Transceiver — TR8165 (8T8R + 2FB), connected to the FPGA via JESD204B/C high-speed bus, providing 8 transmit, 8 receive, and 2 feedback channels
• System Control MCU — On-board microcontroller for power sequencing, monitoring, and low-speed control
• DDR4 Memory — High-capacity high-speed data buffer for the FPGA
• SPI Flash — Stores FPGA configuration firmware and user algorithms
• System Clock Generator — Provides high-precision synchronous clocks across the board
• Power Management Module — Multi-channel regulated outputs with intelligent power management

The board provides comprehensive external interfaces including RF ports, high-speed data interfaces, expansion interfaces, and debug interfaces.

RF Interfaces: 18 RF ports in total (8T8R + 2FB), covering the 400 MHz – 8000 MHz frequency band.

PCIe Interface: Equipped with a PCIe x8 high-speed data interface, upgraded from the previous PCIe x4, doubling the data bandwidth to satisfy the low-latency transmission requirements of massive RF data.

USB 3.0 Interface: One USB 3.0 high-speed data transmission port for data exchange, debugging, and firmware upgrade between the board and the host computer.

J30J-100 Expansion Interface: One 100-pin rectangular connector providing 3 pairs of RS485, 4 pairs of RS232, 24 x 3.3 V GPIO, 10 x 1.8 V GPIO, 5 pairs of differential interfaces, and MCU / FPGA debug interfaces.

User Buttons and Status Indicators: 3 user buttons, plus a power indicator, DDR status indicator, PCIe status indicator, Transceiver link-up indicator, and other status LEDs.

Radar Electronic Warfare

Radar Signal Reconnaissance: Real-time acquisition of transmit signals from phased-array, pulse-Doppler, and other radar types, with precise extraction of core characteristic parameters such as pulse width, PRF, and carrier frequency. It enables rapid radar type identification and parameter analysis, building an accurate radar signal intelligence database.

Targeted Jamming: Based on reconnaissance data, the DAC generates false-target deception signals or high-power barrage jamming, significantly increasing radar ranging and angle measurement errors, effectively masking real targets and greatly reducing radar detection and tracking capability.

Counter-UAS

Communication Link Suppression: Intercepts UAV 2.4 / 5.8 GHz ISM band data-link signals, analyzes their modulation and frequency-hopping characteristics, then generates jamming signals of the same band and standard to cut the control link between the UAV and the ground station, forcing the UAV to return on loss-of-link or land.

Navigation Spoofing: The DAC generates high-fidelity GPS / BeiDou spoofing signals, constructing a false navigation zone within a 500-meter radius to mislead UAVs into receiving incorrect position information, deviating from the planned flight path, and achieving precise control of the flight trajectory.

Communications Countermeasures

5G / LTE Wideband Jamming: Against 5G base stations and terminals in the Sub-6 GHz band, wideband noise jamming signals covering 100 MHz – 10 GHz are generated, reducing 5G communication throughput in the target area by more than 90% and achieving a voice call interruption rate of no less than 95%, effectively blocking regional high-speed wireless communications.

Frequency-Hopping Communications Interception & Jamming: Real-time tracking and jamming of high-speed frequency-hopping radios (500 – 5000 hops / s). Using the FPGA's high-speed processing capability to predict hop frequencies and adjust the jamming signal frequency in advance, achieving precise disruption of frequency-hopping communications.

Located in Guangming District Shenzhen, Shenzhen A T N J Communication is a professional RF manufacturer mainly engaged in R&D, production, manufacturing, sales, and technical services with 16 years of experience. The main products include Digital LTE/NR series repeater, SDR core board, Passive devices, Digital DAS system, Technical solutions for Public and Private (VHF,Tetra) network base station, Wireless frequency modules.

Meanwhile, we undertake OEM, ODM services and projects of various RF, wireless repeaters, multi-frequency DAS systems, remote network management center OAM, and equipment provision of indoor and outdoor signal coverage projects.

Nowadays, our digital repeaters not only reach 12 subbands simultaneously with local and remote control+monitor, but also are supplied to signal operators and Communication integrators worldwide, providing signal coverage solutions for residential areas, office buildings, supermarkets, basements and rural areas.

More mature digital band-selective repeaters were put into overseas mobile operator markets successfully. Our product field extends to Public Safety and Low altitude economic construction applications which include Public and Private Network Digital Multi-subband Repeater wireless signal repeater, Integrated Base Station, Civil countermeasure and phased array radar technology etc. Furthermore, Digital fiber multi-frequency, UHF, Tetra, VHF, Microwave frequency shift repeaters are realized. With the progress of science and technology, easier-to-use, more functional and intelligent RF products are being developed. We look forward to collaborating with you to create a brighter future together.