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We present a link adaptation strategy for multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) based wireless communications. Our objective is to choose the optimal mode that will maximize energy efficiency or data throughput subject to a given quality of service (QoS) constraint. We formulate the link adaptation problem as a convex optimization problem and expand...
In order to analyze the ambiguity function of WiMAX signals and evaluate their suitability for passive radar, the first step should be the generation of WiMAX transmission signal, including random data generation, modulation, Space Time Block Coding (STBC), preamble generation for synchronization and channel estimation, frame combination and Orthogonal Frequency Division Multiplexing (OFDM) modulation...
Multiple-input multiple-output (MIMO) is a generic technique that promises to be a strong contender for 4G wireless systems. This paper presents the design and implementation of a space time block coding (STBC) encoder that is based on Alamouti scheme on a Xilinxreg Virtextrade-4 XC4VLX60 field programmable gate arrays (FPGA) device. This encoder is a part of MIMO testbed, equipped with multiple element...
This paper proposes a structure of adaptive beamforming system especially tailored for IEEE 802.11 n compliant WLAN operating in multiple input-multiple output (MIMO) orthogonal frequency division multiplexing (OFDM) mode. The proposal defines beamforming system for 802.11 n transceiver exploiting space time block coding (STBC) of MIMO technology. The proposed structure is based on adaptive computation...
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