Real-time spectrum estimation and adaptive FMW design for transform domain communication system

Conventional spectrum estimation used in transform domain communication systems (TDCS) was realized by complexity DSP devices, which had high power, high cost and poor real-time capability and FMW design can not automatically adapt to real-time changing environmental. In this article, a lower power, lower cost and lower complexity real-time spectrum estimation and adaptive FMW design method based on SAW Chirp filter technology is proposed. The method can reflect information of the real-time environmental and generate FMW with taking the initiative to avoid interference, which can improve the performances of the system. A system model is established and theoretical analysis is given. Stimulation results demonstrate that the proposed method is practicable and provides better performance than the conventional method.