open access

https://hdl.handle.net/2115/55180

Low-Power Dynamic MIMO Detection for a 4 x 4 MIMO-OFDM Receiver

英語

DVFS

2014-01

Institute of Electronics, Information and Communication Engineers

IEICE Transactions on Fundamentals of Electronics Communications and Computer Sciences

E97A(1)

306-312

This paper describes low-power dynamic multiple-input and multiple-output (MIMO) detection for a 4x4 MIMO-orthogonal frequency-division multiplexing (MIMO-OFDM) receiver. MIMO-OFDM systems achieve high-speed and large capacity communications. However, they impose high computational cost in MIMO detection when separating spatially multiplexed signals and they consume vast amounts of power. We propose low-power dynamic MIMO detection that controls detection speed according to wireless environments. The power consumption is reduced by dynamic voltage and frequency scaling (DVFS) that controls the operating voltage and clock frequency in the MIMO detector. We implemented dynamic MIMO detection in a pipelined minimum mean square error (MMSE) MIMO detector that we developed in our previous work. A power saving of 92% was achieved under lowest clock frequency mode conditions.

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Copyright ©2014 The Institute of Electronics, Information and Communication Engineers

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