An Evolved GSM/EDGE Baseband ASIC Supporting Rx Diversity Harald Kröll, Student Member , IEEE , Stefan Zwicky, Benjamin Weber, Chri stoph Roth, David Tschopp

Abstract

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 c o n n e c t e dt oa nR F - I Ct ob u i l dac o m p l e t eE v o l v e dE D G Et r a n s - ceiver system. The transceiver system reaches a measured sensi- tivity close to 112 dBm for single-antenna GSM voice channels and achieves the reference interfe rence performance for adjacent channels 11.4 dB above 3GPP require ments. 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.