Direct Baseband I-Q Regeneration Method for Five-Port Receivers Improving DC-Offset and Second-Order Intermodulation Distortion Rejection

作者：de la Morena Alvarez Palencia Cristina^*; Mabrouk Kais; Huyart Bernard; Mbaye Amadou; Burgos Garcia Mateo

来源：IEEE Transactions on Microwave Theory and Techniques, 2012, 60(8): 2634-2643.

DOI：10.1109/TMTT.2012.2199512

• Five-port
• five-port calibration
• receivers
• reconfigurable architectures
• six-port
• zero-IF

Six-/five-port architecture has advantages compared with conventional receiver architectures, especially for high frequencies and high-data-rate applications. However, it requires two/one additional baseband outputs and a calibration process to recover the original signal. While this problem is resolved in conventional six-port configurations, a solution is needed for five-port architectures. We propose an I/Q regeneration method based on the use of a simple analog circuit, eliminating one baseband output. The structure of this circuit derives from a mathematical formulation, which is presented in this paper. The validity of the method has been experimentally proved in a five-port receiver prototype. In addition, its capacity to reduce the dc-offset and second-order intermodulation distortion has been demonstrated.

• 出版日期2012-8