Implementation Aspects of Channel Estimation for 3GPP LTE Terminals

Conference: European Wireless 2011 - Sustainable Wireless Technologies
04/27/2011 - 04/29/2011 at Vienna, Austria

Proceedings: European Wireless 2011

Pages: 5Language: englishTyp: PDF

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Simko, Michal; Mehlführer, Christian (Institute of Telecommunications, Vienna University of Technology, Vienna, Austria)
Wu, Di (Department of Electrical Engineering, Linköping University, Linköping, Sweden)
Eilert, Johan; Liu, Dake (ST-Ericsson AT AB, Lund, Sweden)

In this paper, hardware implementation aspects of the channel estimator in 3GPP LTE terminals are investigated. A channel estimation ASIC, which handles the real-time channel estimation, is presented. Compared to traditional correlator-based channel estimators, the channel estimator presented boosts the throughput at feasible silicon cost by adopting a recently proposed estimation method named Approximate Linear Minimum Mean Square Error (ALMMSE). In this paper, both the architecture and VLSI implementation of the estimator are elaborated. Implemented using a 65nm CMOS process, the channel estimator supports the full 20MHz bandwidth of 3GPP LTE and consumes only 49 kgates.