The Application of SSB to High-Frequency Military Tactical Vehicular Radio Sets

The application, characteristics, and limitations of hf radio sets for military vehicular communication are tabulated and discussed. By the use of SSB, transistorization, and electric tuning it is shown that a s/n improvement of 16 db over the most modern existing DSB set of equal size and power drain is possible. A conservative s/n improvement of 7 db is shown theoretically and experimentally to provide up to twice the distance range and up to 170 per cent better word recognition than DSB. Additional advantages of interference reduction, spectrum utilization, quasi-duplex operation, heat reduction, equipment reliability, and reduction of maintenance problems are discussed. The problems of compatibility with DSB, frequency control, voltage breakdown, space, and reduction of mechanical moving parts together with suggested solutions are presented.