CHESS a new reliable high speed HF radio

This paper presents the design and performance of an advanced digital signal processing (DSP) based high frequency (HF) radio developed (patent pending) by Sanders, a Lockheed Martin Company. The radio is called Correlated Hopping Enhanced Spread Spectrum (CHESS). CHESS represents a new generation of spread spectrum HF radio technology, designed to enhance spectrum sharing while providing reliable HF communications at high data rates (4800-19200 bps). The Defense Information Systems Agency (DISA) determined that CHESS does not interfere with conventional HF signals. By employing the technique of correlated fast frequency hopping, CHESS achieves desirable performance features of non-interfering spread spectrum operation, spectral re-use, multipath fading mitigation, and interference resistance.