A Receiver with Instantaneous Large Dynamic Range Based on Cancellation Technique
Yongbo Li · Telecommunication Engineering · 2013
The electromagnetic adaptability of reconnaissance system is restricted to its dynamic range. In view of this,a receiver with instantaneous large dynamic range based on cancellation technique is presented for improving the dynamic range of reconnaissance system. The factors affecting the dynamic range of reconnaissance system are analyzed,and a receiver framework based on cancellation technique is proposed in which the strong signal is separated from multi-signal in the fixed first intermediate frequency and adaptive processing is implemented in digital field and the strong signal is cancelled in analog field. The factors which affect the cancellation rate are also analyzed. The feasibility is validated through simulation and the difficulties to be solved are also indicated.