نتایج جستجو برای: fdma

تعداد نتایج: 542  

2011
R. MUTHAIAH

In this paper, design and implementation of 4G SC-FDMA transceiver on FPGA is done and explained. Long Term Evolution (LTE) is next generation mobile communication standard from 3GPP, it is based on OFDMA) in Downlink Transmission and SC-FDMA in uplink Transmission. SC-FDMA is based on Frequency Division Multiple Access scheme. When compared with other multiple access scheme, it deals with the ...

2012
Heung-Gyoon Ryu Dong Geon An

It is very important to achieve high performance in the SC-FDMA (single carrier frequency division multiple access) system that is used for LTE (long term evolution) and LTE-advanced system. To simultaneously resolve ICI(inter-subcarrier interference) and PAPR(peak to average power ratio) problem, focused on the two transmit(Tx) / one receive(Rx) antenna configuration, phase noise influence on ...

Journal: :The Journal of Engineering 2021

Carrier frequency offset (CFO) is a challenging problem in the uplink of single-carrier division multiple access (SC-FDMA) system. CFOs effect on orthogonality between subcarriers and cause inter-carrier interference (ICI) (MAI). This paper, analyzes impact performance Discrete Sine Transform (DST) SC-FDMA (DST-SC-FDMA) system investigates with different wireless channels, modulation schemes ma...

2007
A. Wilzeck Q. Cai M. Schiewer T. Kaiser

SC-FDMA with dynamic bandwidth assignment was chosen as uplink transmission scheme for the Long Term Evolution (LTE) of the 3GPP UMTS standard [1]. In this contribution we focus on the extension of the Single-Carrier Frequency Division Multiple Access (SC-FDMA) scheme to a MultipleInput Multiple-Output (MIMO) SC-FDMA scheme employing spatial multiplexing and dynamic bandwidth assignment. In the...

2017
Ritu Matu

New technologies emerging day by day and main focus to give a better quality of service at low cost. LTE has adopted DFT-spread OFDMA technique as the uplink multiple access schemes which use single carrier modulation and frequency domain equalization. In our research work, we show the PAPR performance of DFT-spreading technique. The performance of PAPR of DFT spreading technique is dependent o...

2014
Sajjan Singh S. V. A. V. Prasad

The 3rd generation partnership project (3GPP) long term evolution (LTE) standard uses single carrier frequency division multiple access (SCFDMA), scheme for the uplink transmissions and orthogonal frequency division multiplexing access (OFDMA) in downlink. SCFDMA makes use of single carrier modulation and frequency domain equalization, it is a technique that has similar performance and essentia...

2017
Sajjan Singh Pardeep S. V. A. V. Prasad M. M. Rana Md. Saiful Islam Abbas Z. Kouzani Mohamed Noune Elias Yaacoub Zaher Dawy GILBERTO BERARDINELLI LUIS ÁNGEL MAESTRO B. M. Sallam Enchang SUN Pengbo SI Ruizhe YANG Yanhua SUN Yanhua ZHANG Hyung G. Myung Kyle Jung-Lin Pan Robert Olesen Meng Ma Xiaojing Huang Bingli Jiao

The 3rd generation partnership project (3GPP) long term evolution (LTE) standard uses single carrier frequency division multiple access (SCFDMA), scheme for the uplink transmissions and orthogonal frequency division multiplexing access (OFDMA) in downlink. SCFDMA makes use of single carrier modulation and frequency domain equalization, it is a technique that has similar performance and essentia...

Journal: :CoRR 2010
Jagadeesh Harshan B. Sundar Rajan

For a two-user Gaussian multiple access channel (GMAC), frequency division multiple access (FDMA), a well known orthogonal-multiple-access (O-MA) scheme has been preferred to non-orthogonal-multiple-access (NO-MA) schemes since FDMA can achieve the sum-capacity of the channel with only single-user decoding complexity [Chapter 14, Elements of Information Theory by Cover and Thomas]. However, wit...

Journal: :Annales des Télécommunications 2010
Fathi E. Abd El-Samie Faisal S. Al-kamali Moawad I. Dessouky Bassioni M. Salam Farid Shawki

In this paper, a companding technique is proposed to effectively reduce the peak-to-average power ratio (PAPR) in single-carrier frequency division multiple access (SC-FDMA) systems. By companding the samples with large amplitudes, while enhancing those with small amplitudes, a significant reduction in the PAPR can be achieved. The performance of the proposed SC-FDMA with companding system is s...

2011
B U Rindhe D C Shah S K Narayankhedkar

Escalating demand of higher data rate in progressive generations for wireless environment involve work towards modification of modulation schemes over air interface. Beginning from TDMA/FDMA/CDMA based 2nd generation to highly complicated Orthogonal FDMA (OFDMA), Single Carrier FDMA (SC-FDMA), Interleaved FDMA (IFDMA) and Multicarrier CDMA (MC-CDMA) which are gaining attention for 4G networks. ...

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