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FPGA implementation of transmitter of the multi symbol encapsulated orthogonal frequency division multiplexing

机译:多符号封装正交频分复用发送器的FPGA实现

摘要

MSE-OFDM is a new multi carrier system, in which one cyclic prefix used for multiple OFDM symbols. The original motivation for the MSE-OFDM proposal is to reduce the redundancy caused by the cyclic prefix. In this paper the design implementation of MSE-OFDM transmitter on a field programmable gate array has been presented. The implementation is made on FPGA since it allows flexibility in design and also it can achieve higher computing speed than digital signal processors . IDFT block in MSE-OFDM transmitter is implemented by IFFT to enhance the speed. This architecture uses radix-2 algorithm for 8 point IFFT and radix-4 algorithm for 16- point IFFT. Here advantage is that IFFT algorithms use only adders, subtractors and shifter only thus minimizing the hardware requirement compared to other architectures. Here implementation of ‘binary source using pseudo random binary generator’ and ‘M-QAM’ has also been presented. Here the signed numbers are represented using 12-bit signed binary 6.6 fixed point representation so that to get more accurate results even for decimal values. The The proposed design is mapped on to Xilinx virtex-5 xc5vlx30-2ff676 based device. XST synthesis tool has been used to synthesize the model. The result shows that maximum frequency of operation is in range of 600- 700 MHz . the system design is optimized in terms of speed,power and area.
机译:MSE-OFDM是一种新的多载波系统,其中一个循环前缀用于多个OFDM符号。 MSE-OFDM建议的原始动机是减少循环前缀引起的冗余。本文提出了在现场可编程门阵列上MSE-OFDM发射机的设计实现。该实现是在FPGA上实现的,因为它可以实现设计的灵活性,并且与数字信号处理器相比可以实现更高的计算速度。 MSE-OFDM发射机中的IDFT块通过IFFT实现,以提高速度。该体系结构将radix-2算法用于8点IFFT,并将radix-4算法用于16点IFFT。此处的优势在于,IFFT算法仅使用加法器,减法器和移位器,因此与其他架构相比,其硬件需求降至最低。这里还介绍了“使用伪随机二进制生成器的二进制源”和“ M-QAM”的实现。在这里,使用12位带符号二进制6.6定点表示法来表示带符号的数字,以便即使对于十进制值也可以获得更准确的结果。提出的设计被映射到基于Xilinx virtex-5 xc5vlx30-2ff676的设备上。 XST综合工具已用于综合模型。结果表明,最大工作频率在600-700 MHz范围内。系统设计在速度,功率和面积方面进行了优化。

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    Thamalapakula Ashok kumar;

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  • 年度 2013
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