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Publication Date

Spring 2017

Degree Type

Thesis - Campus Access Only

Degree Name

Master of Science (MS)


Electrical Engineering


Sotoudeh Hamedi-Hagh


16-QAM, 5G wireless systems, 64-point IFFT, Cyclic prefix, OFDM

Subject Areas

Electrical engineering


Wireless communication and semiconductor technology have helped electronic devices to become portable, stand-alone units capable of performing the necessary and high-end functions similar to those of a full-fledged desktop. Communication consistency and high-quality media support are achieved through minimal loss of data and high data rates. Orthogonal frequency division multiplexing (OFDM) is one such standard capable of supporting high data rates with minimal signal degradation by transmitting data over a band of frequencies. Demand for 5G network and faster wireless local area networks (WLAN)-based communication poses a challenge for OFDM systems to better their performance rates. Architectural changes and technological advancements have great potential to cope with these challenges. This project concerned the design of a high speed modulator for OFDM systems using 45-nanometer technology that can support a bit rate of 1 Gbps. The architecture consisted of a 16-quadrature amplitude modulation (QAM) constellation mapping scheme and a 64-point inverse fast fourier transform (IFFT) module that will increase the bit rate and provide frequency division to the signal. The design consisted of transistor level schematics along with behavioral modeling using Verilog-A language. The simulation and analysis were done using the Cadence Virtuoso tool and Spectre simulator.