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Govind Ballabh Pant University of Agriculture and Technology, Pantnagar

After independence, development of the rural sector was considered the primary concern of the Government of India. In 1949, with the appointment of the Radhakrishnan University Education Commission, imparting of agricultural education through the setting up of rural universities became the focal point. Later, in 1954 an Indo-American team led by Dr. K.R. Damle, the Vice-President of ICAR, was constituted that arrived at the idea of establishing a Rural University on the land-grant pattern of USA. As a consequence a contract between the Government of India, the Technical Cooperation Mission and some land-grant universities of USA, was signed to promote agricultural education in the country. The US universities included the universities of Tennessee, the Ohio State University, the Kansas State University, The University of Illinois, the Pennsylvania State University and the University of Missouri. The task of assisting Uttar Pradesh in establishing an agricultural university was assigned to the University of Illinois which signed a contract in 1959 to establish an agricultural University in the State. Dean, H.W. Hannah, of the University of Illinois prepared a blueprint for a Rural University to be set up at the Tarai State Farm in the district Nainital, UP. In the initial stage the University of Illinois also offered the services of its scientists and teachers. Thus, in 1960, the first agricultural university of India, UP Agricultural University, came into being by an Act of legislation, UP Act XI-V of 1958. The Act was later amended under UP Universities Re-enactment and Amendment Act 1972 and the University was rechristened as Govind Ballabh Pant University of Agriculture and Technology keeping in view the contributions of Pt. Govind Ballabh Pant, the then Chief Minister of UP. The University was dedicated to the Nation by the first Prime Minister of India Pt Jawaharlal Nehru on 17 November 1960. The G.B. Pant University is a symbol of successful partnership between India and the United States. The establishment of this university brought about a revolution in agricultural education, research and extension. It paved the way for setting up of 31 other agricultural universities in the country.

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20211
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Subject: Electronics and Communication Engineering × Author: Bhatt, Manoj × Thesis Type: Ph.D ×
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    ThesisItemOpen Access
    Behavioral modeling & analysis of digital predistorter for Hpa using neural committee machine
    (G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2021-03) Bhatt, Manoj; Mathur, Sanjay
    For efficient use of HPA, HPA should be operated in high-power region near saturation, which severely distorts the information signal. Due to non-linearity, there always exists an elemental tradeoff between the linearity and the efficacy of the HPA. These nonlinear distortions become more vulnerable when communication system demands high data rate transmission, achieved using bandwidth-efficient modulation techniques, for instance, QAM or multicarrier signals in OFDM having large envelope fluctuation with high PAPR. For improving the linearity-efficiency trade-off along with spectral efficiency, an efficient DPD technique must be required. The distortion effects of PA are more critical in the presence of other transmitter impairments i.e. I/Q imbalance and DC offset which further degrade the performance of communication systems. Since conventional DPD does not mitigate these effects in a single step, hence in this work an attempt to formulate a single step solution to solve this problem is made. In this thesis, the NN committee machine i.e. MoE is studied to implement behavioral modeling, predistorter, and DPD for linearizing the DUT. Firstly, MoE is used to implement the behavioral model of the memoryless Saleh model and then DPD characterization is performed for it, and the simulation results present that MoE performs both the tasks in an efficient manner. Then, MoE is used to perform behavioral modeling of dynamic PAs/transmitters in the presence of other transmitter impairments and is also used to implement predistorter for it. Simulated results show that MoE very closely follows the characteristic of dynamic PAs/transmitter and its inverse characteristic in the presence of other transmitter impairments. After that augmented method and kernel method are incorporated with MoE for enhancing the performance of solo MoE. The simulated results for that show the improved performance with respect to its solo performance. At last, measurement is conducted for validation of digital predistortion and the obtained results show that spectral regrowth in the adjacent band in the system is substantially reduced with respect to no DPD case.