Equalized Time Reversal Beamforming for Indoor Wireless Communications.

摘要: Time-reversal (TR) is a beamforming technique for frequency-selective channels, which has received increasing attention due to its high energy efficiency and low computational complexity wireless communications. In this paper, we present two contributions on time-reversal single-user indoor wideband MISO systems. First, provide novel analyses of baseband TR system using commonly used propagation channel models. We derive closed-form approximations the inter-symbol interference (ISI) with these models in order characterize influence conditions (such as power-delay profile, delay spread, bandwidth) performance metrics. particular, analyze spatial focusing time compression beamforming, their impact bit error rate (BER). As second contribution, introduce an equalized (ETR) that mitigates ISI conventional TR. The proposed ETR utilizes zero-forcing pre-equalizer at transmitter cascade configuration pre-filter. Unlike previous approaches mitigation systems, theoretical bounds show it greatly enhances BER minimal capabilities. By means numerical simulations, verify our outperforms respect under any SNR.