Catalyx Space

Digital Signal Processing Engineer

Ahmedabad, Gujarat · Full time · 2-5 years

Posted
24 Oct 2025
Last verified at source
9 hours ago
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We are looking for a Digital Signal Processing (DSP) Engineer to design, implement, and optimize signal processing algorithms and firmware for spacecraft communication systems. You will work on baseband processing, modulation/demodulation, coding, synchronization, and FPGA-based implementations for S-band and X-band transceivers. The role spans algorithm development, real-time implementation on SoCs or FPGAs, hardware-software integration, and validation using GNU Radio and SDR platforms.



Key Responsibilities:


  • Design and implement DSP algorithms for modulation/demodulation, filtering, synchronization, FEC, and channel estimation.

  • Develop real-time signal processing pipelines for SDR/FPGAs and embedded processors.

  • Implement and test physical layer algorithms (BPSK, QPSK, OQPSK, 8PSK, DVB-S2, etc.) in fixed-point or hardware-efficient forms.

  • Work with SDR frameworks such as GNU Radio for simulation, prototyping, and hardware-in-the-loop validation.

  • Integrate DSP modules with RF front-end and transceiver hardware (S-band, X-band).

  • Collaborate with hardware and firmware teams to co-design FPGA/SoC architectures.

  • Perform link simulations, BER analysis, and channel modeling for satellite communication links.

  • Optimize signal chains for latency, throughput, and power consumption in embedded environments.



Required Skills & Qualifications:


  • B.E./B.Tech or M.E./M.Tech in Electronics, Electrical, Communications, or related fields.

  • 2–6 years of experience in DSP algorithm development for RF or wireless communication systems.

  • Strong understanding of digital communication theory modulation, coding, synchronization, and spectral efficiency.

  • Background in error correction coding (LDPC, Turbo, Reed–Solomon) and hardware implementation.

  • Experience in FMECA, worst-case analysis, and failure-rate modeling of DSP/FPGA subsystems.

  • Hands-on experience with FPGA-based DSP implementation (VHDL/Verilog or HLS) and embedded microcontrollers.

  • Proficiency in GNU Radio, MATLAB/Simulink, or Python for algorithm design and verification.

  • Familiarity with SDR hardware platforms.

  • Understanding of RF front-end characteristics (gain, noise figure, bandwidth, I/Q balance, etc.).



Nice to Have (Preferred):


  • Experience with DVB-S2/X, CCSDS, or similar space communication protocols.

  • Familiarity with real-time OS or Linux driver development for SDR systems.

  • Exposure to beamforming, MIMO, or adaptive modulation schemes.

  • Prior experience in satellite communication systems, CubeSat payloads, or ground station SDRs.

  • Experience with co-simulation environments (MATLAB–FPGA or GNU Radio–SoC integration).

  • Willingness to work extended hours and/or weekends as needed.