Wideband receiver design using frequency-dependent magnitude/phase mismatch

Chi-Hao Cheng
2014 IEICE Electronics Express  
We propose a digital wideband receiver scheme covering multiple Nyquist zones by exploiting phase and magnitude mismatch in the conversion from real-valued signals to complex-valued signals. The digital wideband receiver is designed to detect uncooperative signals. The magnitude/phase mismatch due to an imperfect hybrid coupler is often considered undesirable and needs to be compensated. However, by exploiting the frequency-dependent magnitude/phase mismatch phenomenon, we can distinguish
more » ... s from different Nyquist zones. Simulation results demonstrate that, using carefully designed magnitude/phase mismatch, we can detect signals over multiple Nyquist zones. The proposed method can lead to a new wideband receiver design.
doi:10.1587/elex.11.20140238 fatcat:7ag6lix5vbeyla6udy3gugodge