Naadyx Solutions Pvt. Ltd. | Hyderabad (Gachibowli) | Full-time Naadyx Solutions is an Indian deep-tech defence electronics company building tactical software-defined radios, counter-UAS systems and secure communication products for the Indian armed forces. We are looking for an FPGA engineer who can take a waveform from algorithm to working hardware.

What you'll do
• Design and implement single-carrier and multi-carrier (OFDM) waveforms on FPGA
• Build complete TX and RX baseband chains, from bits to RF interface and back
• Convert MATLAB/Python floating-point models into fixed-point, synthesizable RTL
• Integrate DSP blocks with RF transceivers (AD9361/AD9364 or similar) and ARM processors on Zynq/MPSoC platforms
• Verify designs in simulation and on hardware, and close timing on production builds Must have
• 3+ years of FPGA development in Verilog/VHDL for DSP or communication systems
• Hands-on experience implementing QPSK modulation and demodulation on FPGA
• Proven experience designing single-carrier and multi-carrier waveforms
• Robust grasp of fixed-point arithmetic, bit-width analysis and resource/latency trade-offs Transmit chain skills
• Scrambling, CRC, FEC encoding (convolutional, LDPC or Turbo) and interleaving




• Symbol mapping (BPSK/QPSK/QAM), preamble and pilot insertion
• Pulse shaping (RRC), interpolation, CIC/FIR filters, NCO and digital up-conversion
• OFDM: IFFT, cyclic prefix insertion, windowing, PAPR awareness Receive chain skills
• Digital down-conversion, decimation, AGC and DC offset correction
• Packet detection and frame synchronization (correlation, Schmidl-Cox)
• Timing recovery (Gardner, Mueller-Müller, polyphase filter banks)
• Carrier frequency and phase recovery (Costas loop, PLL, CFO estimation)
• Channel estimation and equalization (LMS, ZF, MMSE)
• OFDM: FFT, CP removal, pilot-based tracking
• FEC decoding (Viterbi, LDPC), de-interleaving, descrambling Tools
• Xilinx Vivado, Vitis HLS; AXI4 / AXI-Stream interfaces
• MATLAB/Simulink (HDL Coder a plus), Python/NumPy
• ModelSim/QuestaSim, ILA/ChipScope for on-hardware debug Good to have
• Frequency hopping, spread spectrum waveforms
• MIMO, MANET or tactical radio experience
• RFSoC, GNU Radio or embedded Linux exposure Eligibility
• B.
Tech/M.
Tech in ECE, EE or related field
• Indian citizen (defence programmes)

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