S Domain Communication System and Its Anti-Interference Performance Analysis

The increasing demand for wireless services brings a colossal burden on spectrum resources. Many researchers are actively exploring dynamic spectrum access for efficient spectrum utilization. In this paper, an S domain communication system is proposed to solve this problem. The key idea of the proposed method is to adaptively generate waveforms in the S transform domain at both sides of the communication system for avoiding the occupied spectrum parts. Simulations show that the proposed method offers better bit error performance with non-stationary interference than other traditional anti-interference techniques that only process signals at the receiver side. Moreover, the proposed system can search the unoccupied frequency bins and generate orthogonal waveforms to adapt to the changing electromagnetic environment. It could be a potential candidate for cognitive radio in non-stationary interference environments.