標題: Cost-Efficient Frequency-Domain MIMO-OFDM Modem With an SIMD ALU-Based Architecture
作者: Yeh, Shao-Ying
Liao, Yuan-Te
Lai, Wei-Chi
Hsu, Terng-Yin
資訊工程學系
Department of Computer Science
關鍵字: Arithmetic logic unit (ALU);cost efficient;modem;multiple input multiple output-orthogonal frequency division multiplexing (MIMO-OFDM);wireless LAN
公開日期: 1-Dec-2015
摘要: In this paper, a single instruction multiple data (SIMD) arithmetic logic unit (ALU)-based architecture is proposed to improve hardware efficiency in a 4 x 4 frequency-domain multiple input multiple output-orthogonal frequency division multiplexing modem based on a space-time block code (STBC). The majority of mathematic units in the proposed architecture are centralized so that any mathematic unit can be shared with any algorithm. Six advanced instructions are also defined in the ALU: 1) complex multiplication; 2) complex division; 3) correlation; 4) channel estimation; 5) 4 x 4 matrix inversion; and 6) STBC-based decoding. A scheduler is essential to handle all data paths and signaling flows smoothly with the use of an SIMD ALU. As a result, it is relatively easy to reconfigure the proposed design for different specifications. The very large scale integration implementation of this chip, using an in-house 65-nm CMOS process, consumes a total of 1.87 M gates and draws 33.7 mW at a supply voltage of 1 V.
URI: http://dx.doi.org/10.1109/TVLSI.2014.2377780
http://hdl.handle.net/11536/129359
ISSN: 1063-8210
DOI: 10.1109/TVLSI.2014.2377780
期刊: IEEE TRANSACTIONS ON VERY LARGE SCALE INTEGRATION (VLSI) SYSTEMS
Volume: 23
Issue: 12
起始頁: 2791
結束頁: 2803
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