Abstract
The use of MIMO networks in wireless communication results in increased data rate but leads to severe interference issues and power losses. Promising beamforming (BF) architecture with Conditional Time split-Energy Extraction (CT-EE) is proposed to maximize the Energy Efficiency while optimizing the Mean Square Error (MSE) and Achievable Sum Rate (ASR). A distributed BF system using Minimum Mean Square Error algorithm is jointly implemented at all cooperating nodes. Energy Extraction (EE) from RF signal at the relay nodes facilitates full connectivity among the users. The signal transmission and EE phases are jointly implemented using time-split architecture, without using fixed pre-assigned time slots. Time split from information decoding to EE phase is done only if the battery life is found to be critical. The paper investigates the scope of bypassing the EE phase after ensuring the required power level. The performance of the proposed architecture is compared with the conventional BF and existing EE methods in terms of MSE, ASR and energy efficiency. The proposed architecture is well suitable to establish uninterrupted connectivity between user nodes which are frequently used and have severe power drain-off issues as they can be a part of natural disaster like flood affected wireless networks.
Highlights
T HE wireless transmission of multimedia information has significantly increased in volume and demanded high performance full duplex relaying MIMO networks [1]
The existing systems compromises in performance constraints like Achievable Sum Rate (ASR), Mean Square Error (MSE) and in signal latency, as considerable time is devoted for energy extraction process to maximize the energy efficiency
minimum mean square error (MMSE) BASED JOINT BEAMFORMING DESIGN MMSE algorithm is described for BF [16] and it works over the deployed energy constrained relays with sufficient extracted energy
Summary
T HE wireless transmission of multimedia information has significantly increased in volume and demanded high performance full duplex relaying MIMO networks [1]. The MIMO based relay antennas should be capable of performing beam formation along with energy extraction to guarantee full time connectivity [3]. Relay nodes modeled as MIMO units increases the diversity but introduces signal interference [4]. This can be mitigated by beamforming (BF) algorithm implemented at relay nodes and source nodes jointly [5]. Various studies have been conducted for efficient energy extraction and BF in wireless networks which are summarized below. Ashok K et al.:Uninterrupted Connectivity Using CT-EE with BF System for Disaster Affected Wireless Networks
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