  In this paper, an analysis is carried out for a method to mitigate the path
loss through the dynamic spectrum access (DSA) method. The path loss is a major
component which determines the QoS of a wireless link. Its effect is
complemented by the presence of obstruction between the transmitter and
receiver. The future cellular network (5G) focuses on operating with the
millimeter-wave (mmW). In higher frequency, path loss can play a significant
role in degrading the link quality due to higher attenuation. In a scenario,
where the operating environment is changing dynamically, sudden degradation of
operating conditions or arrival of obstruction between transmitter and receiver
may result in link failure. The method analyzed here includes dynamically
allocating spectrum at a lower frequency band for a link suffering from high
path loss. For the analysis, a wireless link was set up using Universal
Software Radio Peripherals (USRPs). The received power is observed to increase
by dynamically changing the operating frequency from 1.9 GHz to 830 MHz.
Finally the utility of software defined radio (SDR) in the RF front end, to
combat the path loss in the future cellular networks, is studied.
