Sökning: "orthogonal frequency division multiplexing ofdm"

Visar resultat 21 - 25 av 49 uppsatser innehållade orden orthogonal frequency division multiplexing ofdm.

1. 21. Designing of LTE-Advanced Downlink Transceiver on a Physical Layer

   Master-uppsats, Blekinge Tekniska Högskola/Sektionen för ingenjörsvetenskap

   Författare :Samiallah Shahid; Saqib Mohammad; [2013]
   Nyckelord :LTE-Advanced; Downlink; Transceiver; Physical Layer;

   Sammanfattning : The evolved version of LTE is LTE-Advanced which is being developed by 3GPP. LTE-Advanced will meet or go beyond the requirements of the International Telecommunication Union (ITU) for the fourth generation (4G) radio communication standard known as IMT-Advanced. LTEAdvanced is primarily considered as a part of Release 10 of 3GPP specifications. LÄS MER

3. 22. Control traffic overhead for VoIP over LTE

   Master-uppsats, KTH/Kommunikationssystem, CoS

   Författare :Syed Ghazanfar Salari; [2012]
   Nyckelord :LTE; VoIP capacity; Physical Downlink Control Channel PDCCH ; Control Channel Elements CCE ; indoor hotspot; scheduling concepts; openWNS simulator; performance evaluation;

   Sammanfattning : With increasing technological advancements more sophisticated mobile devices are being used by end-users. Third generation (3G) mobile communication systems such as Universal Mobile Telecommunication System (UMTS) are not able to satisfy the rising demand for higher throughputs and low latencies. LÄS MER

4. 23. Precoding in MIMO, OFDM to reduce PAPR (Peak to Average Power Ratio)

   Master-uppsats, Institutionen för datavetenskap, fysik och matematik, DFM

   Författare :Muhammad Irfan Ishaq; Yasir Ali Khan; Muhammad Talha Gul; [2012]
   Nyckelord :Peak to Average Power Ratio;

   Sammanfattning : One of the critical issues of systems utilizing Orthogonal Frequency Division Multiplexing (OFDM) is the high peak to the average power ratio of OFDM signals. We have used Precoding as a way to mitigate the PAPR problem. Furthermore the performance of Precoded OFDM in fading multi-path channels has been studied. LÄS MER

5. 24. Performance Analysis and Link Design of Long Haul Coherent Optical OFDM Systems

   Magister-uppsats, Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE)

   Författare :Ayhan Yazgan; [2011]
   Nyckelord :;

   Sammanfattning : Orthogonal Frequency Division Multiplexing (OFDM) is a suitable solution due to its many advantages known in wireless communications. On the other hand, optical communications is also used as a backbone to transmit and receive large data rates with economical and good performance. LÄS MER

7. 25. Implementation of MIMO-OFDM System for WiMAX

   Master-uppsats, Institutionen för datavetenskap, fysik och matematik, DFM

   Författare :Muhammad Atif Gulzar; Rashid Nawaz; Devendra Thapa; [2011]
   Nyckelord :MIMO; OFDM; WiMAX;

   Sammanfattning : Error free transmission is one of the main aims in wireless communications. With the increase in multimedia applications, large amount of data is being transmitted over wireless communications. This requires error free transmission more than ever and to achieve error free transmission multiple antennas can be implemented on both stations i.e. LÄS MER