USRP N321 SDR | 2x2 MIMO, 3–6GHz, 200MHz BW, Zynq-7100, QSFP+, SFP+

The  USRP N321 is a high-performance networked Software Defined Radio (SDR) platform, designed for reliability and fault tolerance in large-scale and distributed wireless systems. It features 2 TX and 2 RX channels, each supporting up to 200 MHz instantaneous bandwidth across a frequency range of 3 MHz to 6 GHz. The baseband processor uses a Xilinx Zynq-7100 SoC for real-time, low-latency FPGA processing and a dual-core ARM CPU for standalone operation.

Key Features and Specifications

• 2 TX & 2 RX channels (2x2 MIMO, phase-coherent)
• Frequency range: 3 MHz – 6 GHz
• Bandwidth: 200 MHz per channel
• Xilinx Zynq-7100 SoC FPGA with dual-core ARM CPU
• Sampling rates: 200, 245.76, 250 MS/s
• ADC: 14 bits; DAC: 16 bits
• 1 × QSFP+, 2 × SFP+, 1 × RJ45 (1 GbE, 10 GbE, Aurora)
• Flexible synchronization: 10 MHz clock, PPS, external TX/RX LO, GPSDO
• Remote management: software updates, reboot, factory reset, self-test, monitoring
• Output power: up to 17 dBm; gain range: 0–60 dB
• GPSDO frequency stability: 0.1 ppm, UTC accuracy: <8 ns
• Operating temperature: 0–50°C; Size: 38 × 22 × 4.5 cm; Weight: 3.4 kg

Software Compatibility

Fully compatible with GNU Radio, USRP Hardware Driver (UHD), and advanced networked SDR applications. UHD support enables easy integration and management of multiple devices in distributed wireless testbeds.

Applications

• Phase-coherent MIMO test platforms
• Wireless testbeds and research
• Distributed and remote radio heads
• Spectrum monitoring and analysis
• Advanced wireless and 5G prototyping