  Testbeds are essential for experimental evaluation as well as for product
development. In the context of LTE networks, existing testbed platforms are
limited either in functionality and/or extensibility or are too complex to
modify and customise. In this work we present srsLTE, an open-source platform
for LTE experimentation designed for maximum modularity and code reuse and
fully compliant with LTE Release 8. We show the potential of the srsLTE library
by extending the baseline code to allow LTE transmissions in the unlicensed
bands and coexistence with WiFi. We also expand previous results on this
emerging research area by showing how different vendor-specific mechanisms in
WiFi cards might affect coexistence.
