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In this paper, a new transmit power allocation (TPA) algorithm is proposed for Vertical Bell Labs Layered Space-Time (V-BLAST) system with channel correlation and estimation error. At the receiver, the minimum mean squared error (MMSE) rule is adopted for signal detection. At the transmitter, adaptive power allocation scheme based on Lagrange multiplier method is presented to allocate appropriate...
Cognitive Radio requires improving spectrum utilization, and focusing on complexity of the sub carrier power allocation algorithm in OFDM system, A power allocation method which plots the entire channel into lots sub carriers segments is proposed. It gets the maximum communication throughput by auto-adapted modulation. After improved the method, the system performance is also improved. The result...
The Stage characteristics of urbanization determine the staged feature of the urbanization-ecological environmental coordinated system. The contradiction between urbanization and the ecological environment mainly reflect on relations of the urban economic development and ecological environment. According to the traditional agricultural economy, the beginning of industrialization, later period of industrialization,...
We propose an adaptive transmit antennas selection and transmit power allocation scheme for Vertical-Bell Laboratories Layered Space-Time system in the presence of channel state information imperfection. At the transmitter, based on imperfect channel state information, the proposed scheme is used to select a subset of transmit antennas and allocate proper power for the selected antennas subjected...
Based on the through review of the past research, this paper firstly explored the construct dimension of organization's obligation in employees' psychological contract with investigation of total 415 employees of SMEs at two samples. The results show four-dimension model: development, transaction, relation and working conditions factors. The correlation analysis identify that psychological contract...
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