Pilot Tone Based Carrier Frequency Oﬀset and Channel Estimation in OFDM Relay Network

dc.contributor.author	Kebede, Demessu
dc.date.accessioned	2020-05-04T06:26:24Z
dc.date.available	2020-05-04T06:26:24Z
dc.date.issued	2020-05-03
dc.identifier.uri	http://hdl.handle.net/123456789/10795
dc.description.abstract	Orthogonalfrequencydivisionmultiplexing(OFDM)isafrequency-divisionmultiplexing (FDM) scheme used as a digital multi-carrier modulation method. Many sub-carriers that are parallel, narrow band and orthogonal to each others are used to carry the data over a given channels. But, Carrier frequency oﬀset (CFO) can harmfully inﬂuence the performance of OFDM systems, since they can result in inter carrier interference. ByusingapilottonebasedtechniquethispaperestimatedCFOinOFDMrelaynetworks. Thesimulationresultindicatedthatasthenumberofpilottoneincreasestheaccuracyof the estimated channel increases. The best result is obtained at 30dB with 32 pilot tones, which is around 0.04 for MMSE and 0.07 for LSE. However, the increment of pilot tones reduces little bit the bandwidth eﬃciency and also need additional energy. On the other hand, pilot tone based estimation techniques out performs Moose and Cyclic Preﬁx (CP) based techniques in CFO estimation.	en_US
dc.language.iso	en	en_US
dc.subject	Communication System Engineering	en_US
dc.title	Pilot Tone Based Carrier Frequency Oﬀset and Channel Estimation in OFDM Relay Network	en_US
dc.type	Thesis	en_US