Air Interface Architect

Aim high, go beyond!

At Open Cosmos we are solving the world’s biggest challenges from space, providing businesses, governments and researchers access to more readily available information than ever before - ready for the challenge?

Then read on...

The Satcom team is responsible for the design, delivery and performance of Open Cosmos’ satellite communications services, spanning the space segment, ground infrastructure and global connectivity.

As our Satcom capability continues to grow, we’re now looking for an Air Interface Architect to define and govern the end-to-end PHY and MAC layer architecture underpinning our LEO communication system, shaping how high-performance, scalable connectivity is delivered across the constellation.

What will you be doing?

Defining the end-to-end L1/L2 architecture for satellite communication systems aligned to 3GPP NR-NTN and DVB-S2X standards

Translating LEO dynamics including Doppler effects, latency, beam movement, and visibility constraints into air interface requirements

Driving waveform, numerology, frame structure, and resource allocation design for high spectral efficiency and throughput

Defining coding, modulation, and link adaptation strategies across varying link and environmental conditions

Architecting MAC layer protocols including scheduling, HARQ/ARQ, multiplexing, and resource management mechanisms

Defining mobility and handover frameworks across satellites, gateways, and user terminals

Specifying synchronisation mechanisms including timing advance and frequency pre-compensation strategies

Supporting integration between the air interface and core network functions for NTN connectivity and mobility management

Leading system-level and link-level modelling and simulation activities to validate performance and optimise design decisions

Defining modem architecture and functional partitioning across FPGA/ASIC and software layers to support multi-waveform operation

Contributing to future roadmap activities aligned with evolving 3GPP NTN and satellite communication standards

What You’ll bring

Deep understanding of wireless communication systems and PHY/MAC layer architecture principles

Strong knowledge of 3GPP New Radio NTN standards and familiarity with DVB-S2X

Understanding of waveform design, numerology, frame structures, and resource allocation mechanisms

Knowledge of channel coding and modulation techniques including LDPC, Polar, BCH, and Adaptive Coding and Modulation (ACM)