Design of a Low-Cost, High-Speed CORDIC for the Fourier Transform Applications

• Main Authors: Yu-Hao Lin, 林昱豪
• Other Authors: Ying-Chieh Ho
• Format: Others
• Published: 2017
• Online Access: http://ndltd.ncl.edu.tw/handle/r8zew5

碩士 === 國立東華大學 === 電機工程學系 === 105 === In the recent era, since there are more and more handheld and wearable devices be developed, people can get information anytime and anywhere. The most important reason for those devices getting popular is convenient to bring up. On the other hand, long time operations in those devices are important issues as well. As a result, reducing power consumptions to allow the devices to be used for longer periods of time is the way we will go on. There are superior efficient that using FFT processor to process voice recognition, image recognition, receive and transfer signals and spectrum analysis in those portable devices. In the thesis, we proposed a new Reconfigurable Weighting CORDIC applied to 256-point FFT processor. Using the Reconfigurable Weighting CORDIC to achieve the target angle in only one time rotation. In addition, using the one time scaling can deal with the issue of the scaling factor. To be increase the speed of operation, we decrease the times of rotation. At the same time, we used the Barrel Shifter which built with pass transistor logic and also decrease the chip area. According to our proposal, the average SQNR of this Reconfigurable Weighting CORDIC is 60.58(db), and the minimized value is 48.74(db).