A virtual clock enhancement method for DDS using an analog delay line. - Raik Richter; Hans-Joachim Jentschel (IEEE J. Solid State Circuits, 2001)

The Influence of the RectifiedWave on the Usability of Six-Port-Based Mobile Receivers. - Marko Mailand; Raik Richter; Hans-Joachim Jentschel (ICWMC, 2006)