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High peak to average power (papr) Reduction by using clipping and filteringTechnique in orthogonal frequency Division multiplex (ofdm)

High peak to average power (papr) Reduction by using clipping and filteringTechnique in orthogonal frequency Division multiplex (ofdm) / Rohaida Muhammad
Komunikasi adalah salah satu aspek penting dalam kehidupan. Disebabkan peningkatan dan kemajuan pada abad ini, terdapat pertumbuhan pesat dalam bidang komunikasi. Pada awalnya, isyarat dihantar dalam bentuk analog namun hari ini isyarat dihantar dalam bentuk digital. Untuk penghantaraan yang lebih baik, setiap gelombang pembawa tunggal digantikan dengan gelombang pelbagai. Pada masa kini, sistem gelombang pelbagai seperti CDMA dan OFDM sedang dilaksanakan. OFDM adalah kaedah yang menarik dalam sistem komunikasi tanpa wayar. Pembawa kecil yang berserenjang digunakan untuk membawa maklumat daripada pemancar kepada penerima. Walau bagaimana pun, isyarat OFDM mempunyai nisbah purata puncak kuasa yang tinggi dan akan menyebabkan herotan yang ketara apabila melalui peranti yang tidak lurus seperti penguatkuasa pemancar. Dalam projek ini, focus utama adalah dalam mempelajari asas sistem OFDM serta melaksanakan kaedah pemotongan dan penapisan untuk mengurangkan nisbah purata puncak kuasa supaya sistem ini dapat digunakan dengan lebih berkesan. Teknik modulasi dan jumlah pembawa kecil digunakan untuk menilai prestasi nisbah kuasa puncak ke purata dalam system OFDM. _______________________________________________________________________________________________________ Communication is one of an important aspect in life. Due to the advancement in centuries and its growing demands, there has been rapid growth in the field of communications. Signals, which were initially sent in the analogue domain, are being sent in the digital domain these days. For better transmission, every single carrier wave is being replaced by multi carriers. Nowadays, Multi carrier systems like CDMA and OFDM are now being implemented commonly. Orthogonal frequency division multiplexing (OFDM) is an attractive technique for wireless communication application. Orthogonally placed sub carriers are used to carry the data from the transmitter end to the receiver end. However, OFDM signal has a large peak to average power ratio which results in significant distortion when passed through a nonlinear device such as transmitter power amplifier. This thesis is focused on learning the basics of an OFDM system and has undertaken a method of clipping and filtering to reduce the PAPR in the system so that this system can be used more commonly and effectively. The modulation scheme and the number of subcarrier are used to evaluate the performance of PAPR in OFDM system.
Contributor(s):
Rohaida Muhammad - Author
Primary Item Type:
Final Year Project
Identifiers:
Accession Number : 875004642
Barcode : 00003093645
Language:
English
Subject Keywords:
Communication; Orthogonal frequency; OFDM
First presented to the public:
6/1/2012
Original Publication Date:
3/20/2018
Previously Published By:
Universiti Sains Malaysia
Place Of Publication:
School of Electrical & Electronic Engineering
Citation:
Extents:
Number of Pages - 70
License Grantor / Date Granted:
  / ( View License )
Date Deposited
2018-03-20 12:35:49.301
Date Last Updated
2019-01-07 11:24:32.9118
Submitter:
Mohd Jasnizam Mohd Salleh

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High peak to average power (papr) Reduction by using clipping and filteringTechnique in orthogonal frequency Division multiplex (ofdm)1 2018-03-20 12:35:49.301