Most power consuming components of the mobile system are high speed wireless network interface. This is particularly true for multiple-input multiple-output network interface which uses a multiple number of RF chains simultaneously. In this paper, we introduce an antenna management technique, a novel power reduction scheme for MIMO network interface on mobile systems. The main idea is to reduce some antennas and some RF chain to improve the capacity and reduce circuit power. Antenna management adaptively optimizes the transmit power and antenna configuration is ordered to achieve the minimum energy per bit under a given data rate constraints. The antenna selection algorithm efficiently solves the problem of minimizing energy per bit and uses MIMO-based WLAN standard, IEEE 802. 11n as the operating protocol. The evaluation is based on MATLAB simulation. The results show the front end of the MIMO network interface can achieve a 7% system reliability, the power reduction on one-end energy per bit and two-end energy per bit method will be compare with static MIMO configuration.

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Multiple-input-multiple-output (mimo) Rf Chain Antenna Management Energy Per Bit.