FPGA, RF DSP & embedded systems

Covert Drone Video & C2: Umbra Link BLUF: Most advice on “how to keep a drone video link from getting jammed” assumes the link is already visible—then hops, adapts rate, or adds FEC. That helps after you are found. Umbra Link sells the other approach: keep the RF footprint below the thermal noise floor so … Read more

DSSS vs FHSS: Why Umbra Link Uses DSSS BLUF: FHSS and detect-and-hop radios excel at dodging occupied channels. They remain findable. DSSS, pushed below the noise floor, is the path we productize for LPD. Umbra Link is elexResearch’s below-noise-floor DSSS datalink for Indian drone OEMs—in active development in our Indore RF lab, early access now—because … Read more

Long-Range Covert Drone C2: Umbra Link BLUF: A reliable long-range drone command-and-control link that paints a bright spectrum signature is a long-range beacon. Umbra Link is the product we are building for C2/telemetry that must close distance while staying below the thermal noise floor—invisible to standard spectrum analysis and passive intercept. In active development in … Read more

Anti-Jam vs LPD: Umbra Link for Drone Comms BLUF: “Best anti-jam drone communication system” searches mix two different problems. Anti-jam = keep the link up after the enemy knows you are there. LPD (low probability of detection) = do not give them a clean signal to find in the first place. Umbra Link is sold … Read more

Best DSSS Radio for Drones: Umbra Link BLUF: If you are searching for the best DSSS radio for drones, start with the threat you actually care about. If that threat is being found, the answer is not another hop-on-interference radio—it is a below-noise-floor LPD datalink. Umbra Link is elexResearch’s covert DSSS product in active development … Read more