An Evolved GSM/EDGE Baseband ASIC Supporting

In this paper, a baseband ASIC which supports re- ceive diversity and soft-output Viterbi equalization for enhanced 2G networks is presented. It includes a transmitter and receiver with a symbol detector and a decoder with a dedicated incremental redundancy implementation, as well as the necessary control capa- bility to autonomously communicate with the RF-IC. The ASIC is connected to an RF-IC to build ac omplete Evolved EDGE trans- ceiver system. The transceiver system reaches a measured sensi- tivity close to 112 dBm for single-antenna GSM voice channels and achieves the reference interference performance for adjacent channels 11.4 dB above 3GPP requirements. It is the first reported solution which fulfills the most demanding 3GPP Downlink Ad- vanced Receive Performance Phase 2 testcases specified for Rx-di- versity. The ASIC occupies 6 mm in 130 nm CMOS with a power consumption between 3.9 and 14 mW. Index Terms—Baseband ASIC, enhanced 2G networks, evolved EDGE (E-EDGE), evolved EDGE testbed, GSM/EDGE, hybrid ARQ, incremental redundancy, interference cancellation, in- ternet of things (IoT), machine-to-machine (M2M), Rx diversity, space-time processing.