Improving transport design for WARP SDR deployments
Krishna C. Garikipati, Kang Geun Shin · 2014
Software-Defined radios (SDRs) are a popular platform for developing and implementing wireless protocols. Their basic architecture consists of radio front-ends hosted on an FGPA board, and a back-end processing host for running bulk of the signal processing in software. The two components are bridged, usually by an Ethernet or PCIe interface that transports the radio samples. In addition to the processing delay in software, SDRs may experience a non-negligible transport latency, for example, due to the limited Ethernet bandwidth.