Network and Co-Site Interference Reduction for Spread Spectrum Multichannel

Tactial Multichannel Communication Systems of the 1990´s will require the use of secure spread spectrum techniques. The use of ECCM techniques entails that the communication system be designed from a network point of view, to insure non-interfering operation. Spread spectrum transmission is examined in light of interference reduction techniques both from a network and a co-location point of view. It is shown that a combination of Time Division Duplexing, frequency hopping, forward error correction coding, CPFSK modulation, and synchronized transmission will provide a non-interfering solution. The use of automated frequency management, hosted on a personal computer, enhances the performance of this system especially when the frequency allocation is limited or the network topology is not a mesh. This work was performed on an internal research project for the Canadian Marconi Company.