the way a wifi radio works is this:
a DSP (or FPGA) chip takes data, forms it into packets, and creates two data streams. these data streams are fed to DAC's that give quadrature outputs. these analog signals (I and Q, for Inphase and Quadrature) are fed to a dual analog multiplier where they modulate a 2.4Ghz carrier, and the resulting 2.4Ghz I/Q signals are then mixed to produce a 2,4Ghz SSB signal with spread spectrum characteristics (all of the math and such was done back at the DSP chip while this was still a digital signal). the modulation scheme is OFDM, and is continuous while data is being sent. to change this to a pulsed CW (also known as OOK, for On-Off Keying) would require a major rewrite of the DSP code (or FPGA code, depending on what was used). this code rewrite would also need to change the receiver code as well. then you need some way of reading and interpreting the receiver data.