This presentation will discuss the test results of an Adaptive Orthogonal Frequency Division Multiplexing (AOFDM) modulation system for the improvement of Power Efficiency on the radio link. This work develops a framework that includes Power Efficiency and Spectrum Efficiency bounds and combines this with Spectrum Usage and Delay constraints on the radio link. It further develops a strategy for improving the Power Efficiency subject to constraints on delay and radio link Signal to Noise ratio (SNR) conditions.