BER calculation of OFDM system
A simple method of BER calculation in DPSK/OFDM systems over fading channels
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In orthogonal frequency division multiplexing (OFDM) systems with differential phase shift keying (DPSK), it is possible to apply differential modulation either in the time or frequency domain depending on the condition of fading channels, such as the Doppler frequency
Phase estimation for coherent optical OFDM
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is ready for OFDM symbol decision and BER calculation. We define the phase estimation using data subcarriers as data- aided phase estimation. Based on the result in Fig. 3(a), we use five pilot subcarriers for CO-OFDM system performance evaluations. Fig.
PARAFAC-based unified tensor modeling for wireless communication systems with application to blind multiuser equalization
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a PARAFAC receiver was also proposed for blind channel estimation in OFDM systems. The proposed model unifies the received signal model of three systems: (i) a temporally oversampled system, (ii) a DS/CDMA system [15] and (iii) an OFDM system [16].
Estimation of the bit error rate for direct-detected OFDM signals with optically preamplified receivers
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channel conditions, would possibly yield an even better perfor- mance. V. CONCLUSION We provide the first numerical BER calculation approach for direct detection OFDM systems in the presence of optically preamplified receivers.
Comparing the performance of coded multiuser OFDM and coded MC-CDMA over fading channels
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It is shown in [8] that 6,i, is a dominant factor in BER calculation at high SNR V. SIMULATION RESULTS BER simulations for a M-OFDM system and a MC- CDMA were carried out for a channel with diversity lim- ited to F = 4 and T = 2. The results are shown in figure 4 for different
Tb/s coherent optical OFDM systems enabled by optical frequency combs
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are of the 32 OFDM bands. Although the BER calculation is per OFDM band, the measured received power is for the 1.008-Tb/s signal which includes 32 OFDM bands in the 318-GHz bandwidth. The -dBm Page 6. YI et al.: TB/S COHERENT OPTICAL OFDM SYSTEM 2059
Exact BER analysis of OFDM systems communicating over frequency-selective fading channels subjected to carrier frequency offset
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Against this background, the novel contribution of this paper is that we provide a closed-form expression, rather than a sum of the infinite series in [11], [12], for the average BER calculation of OFDM systems in the presence of both CFO and Phase Estimation Error (PER) in the
On synchronization of opportunistic radio OFDM systems
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We use Pb(?, ) to express the BER calculation function of [6] that requires two input parameters: the average subcarrier SNR ? and what highlights the fact that CFO estimation is almost always accurate enough to not limit the performance of the OR OFDM system even under
Visible light communication using OFDM
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the transmitted bits are known to the receiver, a bit error rate (BER) calculation is also modulation using OFDM is indeed feasible; the high crest factor that plagues OFDM RF equipment is The prototype system has managed a distance close to one meter with an impressive bit
OFDM link performance analysis under various receiver impairments
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Finally, we illustrate which of the mentioned impairments has the most severe impact on OFDM system performance. There- fore, the intention of this article is to introduce a stochas- tic/analytical method to predict the performance metrics of a given OFDM system configuration.
Performance evaluation of BICM-OFDM systems impaired by UWB interference
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OFDM system employs Viterbi decoding with branch metric [13] ?i[k] min x[k]?Xi b { |r[k] – a[k]x[k]|2 } (14) for the ith bit of the kth sub–carrier. Here, Xi b denotes that subset of all symbols in constellation X the labels of which have value b ? {0, 1} in position i. For BER calculation
Mean bit-error rates for OFDM transmission with robust channel estimation and space diversity reception
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b ~ } on the individ- ual OFDM subcarriers with bk A. System Description We assume multivariate complex Gaussian distributed q(‘) N N(,Cqq) with mean vector E [q For the mean BER calculation carried out in the next sec- tion, we need the statistics of the complex Gaussian
Analysis of narrowband communication systems impaired by MB-OFDM UWB interference
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In general, different time–frequency codes will lead to different NB system error rates. The frequency hopping of the MB-OFDM signal and its effect on the NB signal are schematically shown in frequency and time domain in Figs. 1a) and 1b), respectively. In Fig.
On the error vector magnitude as a performance metric and comparative analysis
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OFDM is now being used in different carrier standards in Wireless Local Area Networks (WLANs) and also as compared to that of the slicing and demodulation needed to perform a BER calculation for every Accurate Estimation of Digital Communication System Metrices ,SNR