OFDM symbol
Approximating the Probability Distribution of OFDM Symbol Errors
... We show that, for large N, the total variation distance between the approximation and the true distribution is lower and upper bounded by random variables with fully known probability de[r] ...
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Low Complexity Blind Symbol Timing Offset Estimation in OFDM Systems
... To simplify our analysis, we have chosen to investigate an N-subcarrier OFDM system over an AWGN channel. For comparison, we will evaluate our estimator’s performance over both the AWGN channel and a time-varying ...
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Identifying time-varying channels with aid of pilots for MIMO-OFDM
... Another challenge in a MIMO-OFDM system is how to distribute pilots in the time, frequency and spatial domains. Barhumi et al. [9] and Minn and Al-Dhahir [10] proposes optimal pilot schemes but only for ...
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Analysis of Link Availability in FSO OFDM System under Various Climatic Conditions
... Combining OFDM with FSO gives a hybrid technique – OFDM based FSO or FSO-OFDM in which OFDM symbol modulates the light that passes through free ...the OFDM based FSO system under ...
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Performance Analysis of MSE-OFDM System
... MSE- OFDM signal is similar to OFDM if there is no interference among the OFDM symbols in a ...the OFDM symbols within the same MSE-OFDM frame prior to ...each OFDM symbol ...
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MMSE Channel Prediction Assisted Symbol by Symbol Adaptive OFDM
... The iterative AOFDM mode assignment commences by calculating in the first step for each subband and for all four modulation modes the expected overall subband bit error ratio (BER) by means of averag- ing the estimated ...
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Interference Cancellation Algorithm for 2×2 MIMO System without Pilot in LTE
... for OFDM systems and the MMSE was found to outperform the ML in low ...current OFDM symbol based on channel estimates from previous symbols, ...
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Bit Error Rate of Orthogonal Frequency Division Multipexing System
... the OFDM signal in the frequency ...For OFDM scheme the system bandwidth is break up in to N subcarriers and it leads to symbol rate that is N times lower than the single carrier ...lower ...
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Performance Evaluation of OFDM based Wi Max Transceiver
... Simulation is carried to measure Bit Error Rate BER, Symbol error rate & to measure Number of data bits, coded bits in OFDM symbol by using different modulation & Code rate.. Pre impleme[r] ...
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Symbol Synchronization for OFDM based Heterogeneous Network in the Presence of Co-channel Interference
... Moose [4] presents an idea of using repeated data symbols for synchronization, based on which the most popular synchro- nization technique for OFDM systems is proposed by Schmidl and Cox [5]. They design a ...
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Channel length assisted symbol synchronization for OFDM systems in multipath fading channels
... However, OFDM systems are sensitive to synchroniza- tion errors that may destroy the orthogonality among all ...uncertain OFDM symbol arrival time introduces a symbol timing offset, which is ...
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Orthogonal frequency division multiplex synchronization techniques for frequency selective fading channels
... data symbol, surrounded by virtual subcar- riers, so that the frequency-shifted pilot can be located easily by the ...repeated OFDM symbol pair, analogous to his frequency tracking algorithm to be ...
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FPGA based DWT-IDWT implementation of OFDM on UWB Systems
... The modeled OFDM transmitter-receiver using DWT-IDWT is designed in Simulink. The input is a quantized positive amplitude shifted sine wave of frequencies 1MHz and 5MHz. It sends signals of amplitudes in suitable ...
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MODIFIED SLM SCHEME FOR EFFICIENT PAPR REDUCTION IN OFDM SYSTEMS
... of OFDM system is high Peak-to-Average Power Ratio ...in OFDM system. In proposed BSLM scheme OFDM symbol sequence were partitioned into several blocks and then multiplied each block sequence ...
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Comparative Study of FLIP-OFDM and ACO-OFDM for Unipolar Communication System
... generate a real and positive time domain signal. However, the DC bias depends on the PAPR of the OFDM symbol. Since OFDM has a high PAPR, the amplitude of the DC bias is generally significant. It was ...
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Novel Analytical Approach of Non Conventional Mapping Scheme with Discrete Hartley Transform in OFDM System
... Gaussian approximation analysis for calculation of BER in OFDM system with BPSK over frequency selec- tive channel and its improved analysis using QPSK & QAM have been done in [21] and [22] respectively. In ...
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MMSE Channel Prediction for Symbol by Symbol Adaptive OFDM Systems
... The subband modulation I I I O ~ Passignment requested by receiver B fro111 transmitter A for the current downlink OFDM symbol as well as the modulation mode assignment to be employed by[r] ...
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TURBO CODED OFDM SYSTEM
... the symbol,(i.e. the OFDM symbol with no guard added, which is equal to the length of the IFFT size used to generate the signal) has an integer number of ...the symbol end-to-end results in a ...
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Pilot Symbol Assisted Channel Estimation for Space Time Coded OFDM Systems
... individual symbol in the demodulated signal vector Y(n) will then con- tain a contribution from only one transmitter, and the com- plex channel gain for that particular subcarrier can be eas- ily ...desirable ...
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Preamble and pilot symbol design for channel estimation in OFDM systems with null subcarriers
... In designing the pilot symbols, we have considered pilot placement as well as power allocation. We have proposed an iterative algorithm to determine pilot place- ments and then distribute power to the selected pilot ...
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