An Experimental Comparison of Nondiversity and Dual Frequency Diversity for HF FSK Modulation

This paper describes a unique one-way measurement of dual inband frequency diversity improvement on an HF ionospheric path with frequency division multiplexed FSK modulation. The nondiversity and diversity binary error rates were obtained on the same path and frequencies at the same time. An average error rate improvement of an order of magnitude is shown by the cumulative distributions.