F3: GIRAFE: 4G RF frontends

Digital cellular standards have emerged over the last 20 years. Today, 2G systems like GSM/EDGE are providing worldwide coverage for voice and basic data services. The increasing demand for true-mobile users for high-speed data services has forced the development of 3G toward HSPA. The next step in this evolution is the adoption of OFDM for cellular application in systems like WiMAX and LTE. The user equipment should be compatible to all standards from 2G up to 4G in order to provide the best possible experience to the end user. Therefore, the integration of RF transceivers has to cope with multiple frequency bands, multiple modulation schemes as well as MIMO techniques.