Introduction
The CloudSDR radio is a high performance networked software defined radio with 0.009-56 MHz and
56-1002 MHz frequency coverage (usable to 1600 MHz+). The CloudSDR uses a high performance
ADC running at 122.88 MHz with an optimized frontend. The output IQ bandwidth is configurable via
software up to a maximum of 1.288 MHz at 24 bits or 2.048 MHz at 16 bits. All internal processing and
filtering is done using 24bit IQ pairs. PC communications are handled over a 100 base-T port using
TCP control packets. The IQ streams to the PC via UDP packets.
The CloudSDR is compatible with the
SpectraVue, SDR-Radio, SDR#, CuteSDR, gnu GNURADIO and
other software. The SpectraVue software includes demodulation and I/Q capture of spectrum at up to a
2.048 MHz BW. For those interested in writing their own applications, RFSPACE supplies a fully
documented protocol for communicating with the hardware as well as an open source application for
MacOS, Windows and Linux. The CloudSDR just needs the center frequency, attenuator, output sample
rate and mode to begin streaming data. The CloudSDR utilizes straight TCP/IP/UDP and ethernet for all
communications. This offers the highest possible performance due to the highly optimized ethernet
drivers on PC, Mac and Linux systems.
The CloudSDR packets are fully routable. This means that the receiver can be placed at remote
locations. Multiple receivers can also be combined and it’s data transported over a higher data rate
ethernet pipe using simple switches and routers. In this application, each CloudSDR can be set to a
different IP address or port.
The CloudSDR includes a low bandwidth internet mode for remote operation. In this mode, the radio
performs all demodulation and spectral FFTs onboard. The compressed data is then sent to the client
over a TCP link. This allows the placement of the CloudSDR anywhere in the world with an internet
connection. The RemoteSDRclient and Android SDRanywhere applications are used as clients.
Dec 2020
RFSPACE, Inc.
CloudSDR User’s Guide 6
