Results 191 to 200 of about 14,709 (232)
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2016 2nd International Conference on Applied and Theoretical Computing and Communication Technology (iCATccT), 2016
This paper presents the development of reconfigurable OFDM system for wireless communication system from a historical view. A review of research contributions to reconfigurable OFDM systems are summarized. These contributions comprise a development of reconfigurable OFDM system for Software Defined Radio, Implementation of reconfigurable digital ...
null Drakshayini M N, Arun Vikas Singh
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This paper presents the development of reconfigurable OFDM system for wireless communication system from a historical view. A review of research contributions to reconfigurable OFDM systems are summarized. These contributions comprise a development of reconfigurable OFDM system for Software Defined Radio, Implementation of reconfigurable digital ...
null Drakshayini M N, Arun Vikas Singh
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2015 International Seminar on Intelligent Technology and Its Applications (ISITIA), 2015
The main problem in high data rate transmision is frequency selective fading due to multipath propagation. This fading causes deep fade on signal spectrum at one particular frequency. To overcome this problem, many researchers proposed a multi-carrier technique, which divides wideband signal bandwidth into multiple narrowband signal before transmitted ...
Titiek Suryani +3 more
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The main problem in high data rate transmision is frequency selective fading due to multipath propagation. This fading causes deep fade on signal spectrum at one particular frequency. To overcome this problem, many researchers proposed a multi-carrier technique, which divides wideband signal bandwidth into multiple narrowband signal before transmitted ...
Titiek Suryani +3 more
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2016 10th IEEE International Conference on Anti-counterfeiting, Security, and Identification (ASID), 2016
The rapid development of wireless communication technologye provide users with more convenience but also accompanied serious interference problem in wireless communication. Resolution of interference problem become much important for communication process.
null Jun Huang +5 more
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The rapid development of wireless communication technologye provide users with more convenience but also accompanied serious interference problem in wireless communication. Resolution of interference problem become much important for communication process.
null Jun Huang +5 more
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Hybrid orthogonal frequency division multiplexing (H-OFDM) for visible light communication
11th International Conference on Wireless Communications, Networking and Mobile Computing (WiCOM 2015), 2015In this paper, we present a novel hybrid orthogonal frequency division multiplexing (H-OFDM) for visible light communication (VLC). H-OFDM uses a combination of DC-bias optical OFDM (DCO-OFDM) and asymmetrically clipped optical OFDM (ACO-OFDM) techniques.
null Zhang Jun, null Zhang Jian
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Annales Des Télécommunications, 2005
In this paper, we present an iterative approach for the cancellation of phase errors induced by local oscillators in anOfdm receiver as well as the distortion resulting from nonlinear amplifiers. We investigate the influence of several parameters on the system performances, such as the modulation scheme, the number of carriers and the clipping ratio ...
François Marx +2 more
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In this paper, we present an iterative approach for the cancellation of phase errors induced by local oscillators in anOfdm receiver as well as the distortion resulting from nonlinear amplifiers. We investigate the influence of several parameters on the system performances, such as the modulation scheme, the number of carriers and the clipping ratio ...
François Marx +2 more
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2007 IEEE 18th International Symposium on Personal, Indoor and Mobile Radio Communications, 2007
In this paper, we propose transmit power adaptation scheme for downlink multiple relay orthogonal frequency division multiplexing (MR-OFDM) system to maximize total data rate with fixed bit error rate (BER) and sum power constraint. At first, by allocating the same transmit power at each subcarrier, the proposed scheme only has to select the best ...
Ik HyunKim, Hui Won Je, Kwang Bok Lee
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In this paper, we propose transmit power adaptation scheme for downlink multiple relay orthogonal frequency division multiplexing (MR-OFDM) system to maximize total data rate with fixed bit error rate (BER) and sum power constraint. At first, by allocating the same transmit power at each subcarrier, the proposed scheme only has to select the best ...
Ik HyunKim, Hui Won Je, Kwang Bok Lee
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2009 11th International Conference on Transparent Optical Networks, 2009
The paper addresses OFDM transmission over optical links with low and moderate cost optics which is mandatory in access and in metro applications. Here we address especially direct detection receivers using photo detectors without the need for local lasers at the transmitter side.
Werner Rosenkranz +2 more
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The paper addresses OFDM transmission over optical links with low and moderate cost optics which is mandatory in access and in metro applications. Here we address especially direct detection receivers using photo detectors without the need for local lasers at the transmitter side.
Werner Rosenkranz +2 more
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Maximum bandwidth of orthogonal frequency division multiplex (OFDM) over multipath fading channel
2004 International Conference on Communications, Circuits and Systems (IEEE Cat. No.04EX914), 2004Orthogonal frequency division multiplex (OFDM) is known as an effective method for high-rate transmission over frequency selective fading channels. However, time variations of the channel within an OFDM symbol leads to a loss of orthogonality between subcarriers, resulting in interchannel interference (ICI).
null Zhou Kainan, null Chew Yong Huat
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OFDM (Orthogonal Frequency Division Multiplexing) Simulation Applying Matlab
SSRN Electronic Journal, 2022Shreyam Chaurasia, Abhijit Kumar
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2003 IEEE Wireless Communications and Networking, 2003. WCNC 2003., 2005
Future, high bit rate communication systems tolerate very little error in the modulation. This means that conventionally negligible error sources like the imbalance between the in-phase (I) and quadrature (Q) branches of the receiver can start limiting the performance of the system.
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Future, high bit rate communication systems tolerate very little error in the modulation. This means that conventionally negligible error sources like the imbalance between the in-phase (I) and quadrature (Q) branches of the receiver can start limiting the performance of the system.
openaire +1 more source