文章基本信息

标题：ADAPTIVE MODULATION IN RECONFIGURABLE PLATFORM
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作者：S. SELVAKUMAR ; Dr.S.RAVI ; M.VINOTH 等
期刊名称：Journal of Theoretical and Applied Information Technology
印刷版ISSN：1992-8645
电子版ISSN：1817-3195
出版年度：2014
卷号：68
期号：1
出版社：Journal of Theoretical and Applied
摘要：Autonomous modulation and detection technique in modern communication systems is done using proper signal detection schemes and prominent receiver structure. The modulation schemes used in this paper are ASK, FSK, BPSK and QAM. Modulation techniques are created in Simulink which is converted into Xilinx core and this further undergoes changes using system generator module. This results in the generation of Verilog files and is deployed in FPGA. Using a microcontroller the FPGA was programmed with respective bit files and the modulation that had the best channel support is selected. The methodology used to identify the best modulation for a particular link in reconfiguration is called adaptive modulation process. The interface is done between the reconfiguring controller (STM32) and the reconfigured FPGA (XCS250-pq144) using JTAG port. The programmed files were created (XSVF format) and placed in SD-card of microcontroller. The condition for changing from one modulation to another is based on the link support and signal position. The HyperTerminal displays the output corresponding to different modulation selections autonomously. Signal to Noise Ratio (SNR), Available Bandwidth and Bit Error Rate (BER) are the factors responsible for the selection of modulation scheme. Hence, better quality of service, system complexity, power efficiency, bandwidth efficiency and cost effectiveness are the advantages of Adaptive Modulation technique.
关键词：BER; FPGA; Microcontroller; Modulations; SNR; and Xilinx.