sub-carriers
Target Localization in MIMO OFDM Radars Adopting Adaptive Power Allocation among Selected Sub-Carriers
... the sub-carriers. The sub-carrier selection [18] was made by evaluating the singular values (obtained from singular value decomposition) at each of the sub-carrier based on thresholding ...
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Optical 64QAM OFDM Transmission Systems with Different Sub Carriers
... We compared constellations and BER in the case of sub-carriers are 16, 32, 64, 128, 256 and 512. The comparison is shown that the BER is gradually increased and the quality of optical receiving signal ...
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Dynamic Differential Modulation of Sub-Carriers in OFDM
... orthogonal sub-carriers, with baseband data on each sub-carrier being independently modulated commonly using some type of quadrature amplitude modulation (QAM) or phase-shift keying ...
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Fast Fourier Transform Pipeline Architecture for OFDM
... N sub-carriers, the total passband bandwidth will be B ≈ N·Δf ...the sub-carriers will no longer be orthogonal, causing inter-carrier interference (ICI) ...the sub- ...
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Int. J. of Engg. Sci. & Mgmt. (IJESM), Vol. 2, Issue 2: April-June: 2012, 261-265
... of sub carrier are present in the transmitted signal and also include cyclic prefix such that it can protect against multipath channel and also prevent the ISI in case, when cyclic prefix greater than delay of ...
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Achieving Directionality and Transmit Diversity via Integrating Beam Pattern Scanning (BPS) Antenna Arrays and OFDM
... In this paper, we introduce a novel merger of antenna arrays with scanning beam patterns, and Orthogonal Frequency Division Multiplexing (OFDM) systems. Controlled time varying phase shifts are applied to the antenna ...
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Turbo coded Orthogonal Frequency Division Multiplex transmission of 8 kbps encoded speech
... Carrier Freqlwncp: Sampling Rate: Channel Impulse Response: Normalised Doppler Frequency: OFDM Number of Sub-Carriers: Cyclic Extension: Data Sub-Carriers: Pilot Sub-Carriers: Modulation[r] ...
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Spectrum Monitoring for OFDM Based Cognitive Radio Network
... In our model, the fusion node constructs OFDM frames in the downlink path such that the same pilots are transmitted to all slaves but the data sub-carriers are allocated in time and frequency for different ...
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EVALUATION OF BER PERFORMANCE OF FFT-OFDM FOR WIRELESS COMMUNICATION NETWORKS
... smaller carriers, so even if you have one fading in one specific frequency the station still has other useful channels, which can still convey the ...among sub-carriers is allowing improved spectral ...
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Performance enhancement of wireless mobile adhoc networks through improved error correction and ICI cancellation
... the sub- carriers in each data block are dedicated for sending the pilot data, as being done in comb-type estimator (Figure 3b), we used block-type estimation approach where some of the symbols are ...
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A OFDM in LTE Using Different Modulation Techniques with BER Analysis Based On Wavelet and Conventional
... Each sub-carrier is modulated with a conventional modulation scheme (such as quadrature amplitude modulation) at a low symbol rate, maintaining data rates similar to conventional single carrier modulation schemes ...
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Performance Evaluation of an adaptive OFDM-based PLC System with an Impulsive Noise Environment
... presented that assesses the impact of impulsive noise on an adaptive OFDM-based PLC system. The statistical properties of the impulsive noise have been utilized in their most basic form. The error statistics obtained ...
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A Hybrid SLM Technique for PAPR Reduction in OFDM
... With the advancement in age and its growing demands, there has been rapid growth in the field of communications. Multi- carrier modulation is an attractive technique for fourth generation wireless communication. ...
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Simplified residual phase correction mechanism for the IEEE 802 11a standard
... The ICI appears as an additive Gaussian noise and the only way to combat it is by redesigning the RF oscillators. The CPE is seen as a constant phase inside the OFDM symbol, similar to the effect mentioned above when a ...
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PAPR Influence Analysis in 8QAM OFDM Optical Access Systems
... With the rapid development of optical OFDM access technology, it has become one promising modulation tech- nique [1]. OFDM has a lot of advantages, such as high spectrum efficiency, strong dispersion tolerance and small ...
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DMT transmission in the context of industrial telecontrol applications
... This situation calls for dynamic adaptation, that is, adap- tation of the system to changed channel conditions during runtime. In ADSL, for example, a sequence of bit-swap com- mands can be exchanged to redistribute bits ...
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Computation over wide band multi access channels : achievable rates through sub function allocation
... Abstract—Future networks are expected to connect an enor- mous number of nodes wirelessly using wide-band transmission. This brings great challenges. To avoid collecting a large amount of data from the massive number of ...
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PAPR Analysis in OFDM Systems Using PTS Reduction Technique
... Due to the occurrence of a large number of independently modulated sub carriers, the peak value of the system become very high as compared to the average of the system. The ratio between these two are ...
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ANALYSIS THE PERFORMANCE OF MULTI-CARRIER CDMA SYSTEM WITH FADING AND INTERFERENC
... MC-CDMA is a modulation method that uses multi carrier transmission of DS-CDMA type signals. An MC-CDMA transmitter spreads the original data stream in the frequency domain over different sub carriers using ...
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3 D Modeling of Temperature Effect on a Polycrystalline Silicon Solar Cell under Intense Light Illumination
... of carriers in the base of the solar cell which is a function of the support material band gap of this solar cell, the illumination mode, the carriers diffusion parameters and recom- bination ...of ...
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