OFDM transmission
Optical 64QAM OFDM Transmission Systems with Different Sub Carriers
... 64QAM-OFDM transmission system. 64QAM-OFDM optical signals with 16, 32, 64, 64, 128, 256 and 512 sub-carriers are transmitted over 100 km single mode fiber ...after transmission, the bit error ...
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Blind Coarse Timing Offset Estimation for CP OFDM and ZP OFDM Transmission over Frequency Selective Channels
... the OFDM symbols has been estimated without any additional pilots using the cyclic prefix or zero-padding structure of the transmitted ...CP- OFDM and ZP-OFDM ...
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Database Based Phase Noise Compensation in CO-OFDM Transmission
... We applied matlab simulation to a 1000 km CO-OFDM transmission with QPSK modulated 512 subcarriers. The acquired traces are processed according to the theory and proposal in section 2 & 3. The ...
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OFDM Transmission Simulation using GNU Octave
... of OFDM is to divide the available spectrum into parallel channels in order to transmit data on these channels at a low ...The OFDM concept is based on the fact that the channels referred to as carriers are ...
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Adaptive Modulation Techniques for Duplex OFDM Transmission
... Abstract—The design tradeoffs of turbo-coded burst-by-burst adaptive orthogonal frequency division multiplex (OFDM) wide- band transceivers are analyzed. We demonstrate that upon aiming for a higher throughput a ...
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Compromise between Guarg Interval and Orthogonality in OFDM Transmission
... It is clear from Fig. 5(B) and Fig. 5(C) that the BER performance with CP or ZF of length 16 samples is consistent with that of the analytic result in the Rayleigh fading channel. This implies that the OFDM system ...
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OFDM Transmission and Reception: Review
... M. Merlyn [6], focused on design and implementation of a variable-length prototype FFT/IFFT processor to cover various specifications of OFDM applications which is implemented on FPGA using Verilog HDL. He ...
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A composite approach to self sustainable transmissions : rethinking OFDM
... in OFDM-based systems rely on either power splitting or time switching strategies at the receiver [8]–[12], similar to what is typically proposed in the literature [5], ...the OFDM receiver [8], [10], [12] ...
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Interference Robust Transmission for the Downlink of an OFDM Based Mobile Communications System
... data transmission, additional degrees of freedom are available which can be exploited for inter- ference suppression at the ...that transmission with real-valued data symbols can lead to a higher spectral ...
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The Physical Layer of the IEEE 802.11p WAVE Communication Standard: The Specifications and Challenges
... radio transmission, due to reflections and mobility the channel spectral response has fades in the response causing cancellation of certain frequencies at the ...the transmission frequency then the entire ...
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New Transmission Coding Scheme for MIMO-OFDM System
... an OFDM symbol cause ICI and estimate is converted block to the frequency domain ...blocks OFDM transmission framework with inherent ICI self cancellation capability with transmitter and receiver ...
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ENHANCEMENT CHANNEL ESTIMATION TECHNIQUES FOR OFDM SYSTEMS WITH REALISTIC INDOOR FADING CHANNELS.
... an OFDM transmission such as DAB, information signals from multiple stations are combined into a single multiplexed stream of ...the OFDM signal are time and frequency synchronized to each other, ...
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An improved iterative channel estimation algorithm for high mobility OFDM systems
... Honggui Deng 1 , Junzhi Zhao 1 , Xu Deng 2 , Songshan Ma 1 1 School of Physics and Electronics, Central South University, Changsha 410083, China 2 School of Information Science and Engineering, Central South University, ...
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A Review On Precoder In Ofdm Based Cognitive Radio
... Cognitive radio (CR) is an emerging communication design paradigm [1],[2] in which the radios devices equipped with transceivers can sense the underlying radio environment and adapt their transmission/reception ...
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A Technique COFDM For Improving Efficiency To Transmitted An Images Through Modulation Technique For Wireless Communication Problem
... This research paper concentrated on COFDM, however most practical system would use forward error correction to improve the system performance. Here in future more work needs to done on studying forward error correction ...
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PAPR Reduction Using Hybrid PTS-Companding-SLM Technique in OFDM Communication System
... Despite the widespread acceptance of OFDM, it has its drawbacks. One drawback is that OFDM signals suffer from large envelope variations. Such variations are problematic because practical communication ...
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1. Proposing new equalizer of better performance than previous ones for mimo-ofdm systems
... Proposed technique uses 2x2 MIMO-OFDM as System model.In MIMO systems, a transmitter sends multiple streams by multiple transmit antennas. The transmit streams go through a matrix channel which consists of all Tx ...
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Performance of Bit Error Rate and Q-Factor for OFDM-RoF System using QAM Modulation
... the OFDM combining with RoF system increases the higher spectrum efficiency and the high performance of the Radio ...of OFDM is to implement a RoF system for increasing high bandwidth, low attenuation, ...
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AN ADAPTIVE POWER ALLOCATION SCHEME FOR ROBUST TRANSMISSION OF JPEG COMPRESSED IMAGES OVER MIMO- OFDM SYSTEMS
... Detection algorithms like zero forcing (ZF), maximum likelihood detection (MLD) and minimum mean square estimation (MMSE) applicable to MIMO can be applied for MIMO-OFDM as well with slight changes in the ...
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DATA RATE ENHANCEMENT OF GSM USING OFDM TECHNIQUE
... ADAPTIVE- OFDM to avoid ISI (Inter Symbol ...ADAPTIVE- OFDM symbol ...ADAPTIVE- OFDM symbol is preceded by a periodic extension of the signal ...
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