OFDM (Orthogonal Frequency Division Multiplexing) is an efficient modulation scheme widely used in digital communication systems. Although OFDM has advantages such as high bit rate, it is very important to address the drawback of high PAPR that results in signal degradation. Non-linearity of HPAs (High Power Amplifiers) results in out-of-band distortion which results in adjacent channel interference.
This project involved evaluation of a variety of PAPR reduction methods such as Clipping and Filtering, Selective Mapping, Interleaving and Constellation Shaping. After weighing the pros and cons, Constellation Shaping technique was studied and implemented using MATLAB. This report also includes implementation of UMTS-LTE (Universal Mobile Terrestrial System-Long Term Evolution) downlink layer using a reduction block to reduce PAPR. The algorithm is flexible enough for a variety of bandwidths and modulation schemes.
|Commitee:||Aghnatios, Wajdi, Mozumdar, Mohammad|
|School:||California State University, Long Beach|
|School Location:||United States -- California|
|Source:||MAI 56/03M(E), Masters Abstracts International|
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