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In this paper, we consider a millimeter wave (mmWave) multiple-input multiple-output (MIMO) communication system with hybrid beamforming architecture. To search the optimal beam pair, the beam sweeping algorithm is complex and time-consuming in the case of initial access and beam switching. With the aim of improving the robustness, we propose a novel beam management scheme to quickly determine the...
This paper addresses the transmit power control with multiple antennas. A theoretical comparison of transmit diversity and beamforming techniques in the presence of fading correlation at an antenna array and handoff is presented. The objective is to investigate transmit power of both system and investigate the effect of array perturbations that exist in practical applications of antenna arrays. The...
The frame splitting (FS) for the downlink transmission from a base station (BS) with distributed antennas to a mobile station is studied. A data frame from the BS is split into two portions that are transmitted consecutively from the distributed antennas. For uncoded transmission, the bit error rate (BER) is formulated as a function of the FS ratios, and an analytical optimal FS ratios is derived...
The frame-splitting (FS) for the downlink transmission from a base station (BS) that has distributed antennas to a mobile station is studied. A data frame from the BS is split into two portions that are transmitted consecutively from the distributed antennas. The bit error rate (BER) is formulated as a function of the FS ratios. Based on this analytical model, the closed-form solution of the optimal...
Multi-phase cooperative communication in a wireless network is studied in this paper. Each node is a mobile module having multiple antennas (MA) or a group of sensors forming a virtual antenna array (VAA). The scenario comprises a number of multiple-input multiple-output (MIMO) channels with mutually independent Rayleigh fading processes. A data frame from a signal source node is split into portions...
The performance of a multi-phase cooperative communication is studied in a wireless network. Each node is a mobile module having multiple antennas (MA) or a group of sensors forming a virtual antenna array (VAA). The scenario comprises a number of multiple-input multiple-output (MIMO) channels with mutually independent Rayleigh fading processes. A data frame from a signal source node is split into...
We propose and compare two receiver structures that combine optimum receive beamforming, respectively, with the conventional Alamouti space-time block code (STBC) decoder and the minimum mean squared error (MMSE) decoder. The beamforming process suppresses co-channel interference (CCI) by maximizing the uplink signal to noise plus interference ratio (SINR). Co-antenna interference (CAI) is suppressed...
A novel scheme that jointly utilizes switched beam antennas in double-directional radio channel (DDRC) is proposed. Employing directional beam pattern at both transmitter (Tx) and receiver (Rx) sides in DDRC provides distributed directivity gain (DDC). Jointly switching directional patterns at both ends provides extra diversity gain. We employ two electronically steerable parasitic array radiator...
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