[1] Texas Instuments Inc, Dallas, TX 75243 USA
[2] Lund Univ, Dept Elect & Informat Technol, SE-22100 Lund, Sweden
[3] Hong Kong Univ Sci & Technol, Dept Elect & Comp Engn, Kowloon, Hong Kong, Peoples R China
[4] MediaTek USA Inc, RF Design Div, San Jose, CA 95134 USA
[5] Analog Devices Inc, Somerset, NJ 08873 USA