A Low-Power Adaptive MIMO Detector for MIMO-OFDM WLAN Systems
نویسندگان
چکیده
A MIMO-OFDM receiver requests high-speed MIMO detection to separate spatially multiplexed signals on real-time processing, which causes large power dissipation due to its high throughput performance. We present an adaptive MIMO detector which adaptively changes the computational speed of MIMO detection by estimating Doppler shifts correlated with fading channel variations. The adaptive detector uses a DVFS technique which dynamically changes a clock frequency and a supply voltage according to the selected computational speed. This work discusses an 8x8 MIMO detector assuming single-user MIMO usage in IEEE802.11ac wireless LAN systems. The conventional and the proposed MIMO detectors have been evaluated in power dissipation.
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