Pulse Shape Design of Biorthogonal Frequency Division Multiplexing with Massive Connection Support for IoT

• Main Authors: Huang, Cheng Yu, 黃承毓
• Other Authors: Wu, Jen Ming
• Format: Others
• Language: en_US
• Published: 2015
• Online Access: http://ndltd.ncl.edu.tw/handle/92890458806176721165

碩士 === 國立清華大學 === 通訊工程研究所 === 104 === In future, Internet-of-Thing (IoT) will be the indispensable part of development of 5G wireless communication system due to rapid growth of devices with an ability to communicate autonomously. The major challenge is massive connection issue. In this thesis, we reduce intersymbol interference (ISI) and intercarrier interference (ICI) for enhancing the number of IoT devices in high mobile environment by optimizing the performance of Biorthogonal Frequency Division Multiplexing (BFDM). BFDM is invented to reduce the interference through a flexible design of the signal pulse shaping. We apply B-splines and Gaussian pulse for pulse shape which have good properties to reduce ISI/ICI and use an algorithm named canonical Gabor tight window to calculate receive pulses. In particular, we optimize Gaussian pulse in BFDM by minimizing the tail of the ambiguity function. Simulation results show that the proposed BFDM outperforms the conventional OFDM in ISI/ICI power, SIR and the IoT devices load in time-frequency dispersive channels. BFDM not only achieves the reduction of interference, but also increases the number of devices which system could support.