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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
Maybe https://github.com/AlexandreRouma/SDRPlusPlus gives some inspirations?
https://github.com/librtlsdr/librtlsdr may be a good starting point.
A 5 second search on google reveals that there are popular and performant SDR libraries for controlling rigs in C/C++. I don't know see you felt you needed to make this post.
NOTE:
The number of mentions on this list indicates mentions on common posts plus user suggested alternatives.
Hence, a higher number means a more popular project.