The Experts below are selected from a list of 521409 Experts worldwide ranked by ideXlab platform
Dirk Slock - One of the best experts on this subject based on the ideXlab platform.
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pairwise error Probability Analysis for power delay profile fingerprinting based localization
Vehicular Technology Conference, 2011Co-Authors: Turgut Oktem, Dirk SlockAbstract:Although most of the conventional localization algorithms rely on LOS conditions, it is possible to do positioning with Power Delay Profile-Fingerprinting (PDP-F) in multipath and even in NLOS environments. Many algorithms for position fingerprinting have been developed, but analytical investigation in this area is still not matured yet. In this paper we aim to find the pairwise error Probability (PEP) for PDP-F based localization systems. The objective is to see the performance of PDP-F algorithms under different cost functions and also under different path amplitude assumptions. By PEP, what is meant is the same as in the PEP Analysis in digital communication channels. Hence the approach is similar for PDP-F. However its Analysis is not as straightforward as it is for the digital communication channel case. We investigate and show the results for least squares (LS) based algorithm under deterministic path amplitude modeling and Gaussian Maximum Likelihood (GML) based algorithm for the Rayleigh fading modeling of the path amplitudes.
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pairwise error Probability Analysis for power delay profile fingerprinting based localization
Vehicular Technology Conference, 2011Co-Authors: Turgut Oktem, Dirk SlockAbstract:Although most of the conventional localization algorithms rely on LOS conditions, it is possible to do positioning with Power Delay Profile-Fingerprinting (PDP-F) in multipath and even in NLOS environments. Many algorithms for position fingerprinting have been developed, but analytical investigation in this area is still not matured yet. In this paper we aim to find the pairwise error Probability (PEP) for PDP-F based localization systems. The objective is to see the performance of PDP-F algorithms under different cost functions and also under different path amplitude assumptions. By PEP, what is meant is the same as in the PEP Analysis in digital communication channels. Hence the approach is similar for PDP-F. However its Analysis is not as straightforward as it is for the digital communication channel case. We investigate and show the results for least squares (LS) based algorithm under deterministic path amplitude modeling and Gaussian Maximum Likelihood (GML) based algorithm for the Rayleigh fading modeling of the path amplitudes.
Turgut Oktem - One of the best experts on this subject based on the ideXlab platform.
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pairwise error Probability Analysis for power delay profile fingerprinting based localization
Vehicular Technology Conference, 2011Co-Authors: Turgut Oktem, Dirk SlockAbstract:Although most of the conventional localization algorithms rely on LOS conditions, it is possible to do positioning with Power Delay Profile-Fingerprinting (PDP-F) in multipath and even in NLOS environments. Many algorithms for position fingerprinting have been developed, but analytical investigation in this area is still not matured yet. In this paper we aim to find the pairwise error Probability (PEP) for PDP-F based localization systems. The objective is to see the performance of PDP-F algorithms under different cost functions and also under different path amplitude assumptions. By PEP, what is meant is the same as in the PEP Analysis in digital communication channels. Hence the approach is similar for PDP-F. However its Analysis is not as straightforward as it is for the digital communication channel case. We investigate and show the results for least squares (LS) based algorithm under deterministic path amplitude modeling and Gaussian Maximum Likelihood (GML) based algorithm for the Rayleigh fading modeling of the path amplitudes.
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pairwise error Probability Analysis for power delay profile fingerprinting based localization
Vehicular Technology Conference, 2011Co-Authors: Turgut Oktem, Dirk SlockAbstract:Although most of the conventional localization algorithms rely on LOS conditions, it is possible to do positioning with Power Delay Profile-Fingerprinting (PDP-F) in multipath and even in NLOS environments. Many algorithms for position fingerprinting have been developed, but analytical investigation in this area is still not matured yet. In this paper we aim to find the pairwise error Probability (PEP) for PDP-F based localization systems. The objective is to see the performance of PDP-F algorithms under different cost functions and also under different path amplitude assumptions. By PEP, what is meant is the same as in the PEP Analysis in digital communication channels. Hence the approach is similar for PDP-F. However its Analysis is not as straightforward as it is for the digital communication channel case. We investigate and show the results for least squares (LS) based algorithm under deterministic path amplitude modeling and Gaussian Maximum Likelihood (GML) based algorithm for the Rayleigh fading modeling of the path amplitudes.
Hlaing Minn - One of the best experts on this subject based on the ideXlab platform.
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an exact error Probability Analysis of ofdm systems with frequency offset
IEEE Transactions on Communications, 2009Co-Authors: Prathapasinghe Dharmawansa, Nandana Rajatheva, Hlaing MinnAbstract:In this paper, we derive exact closed form bit error rate (BER) or symbol error rate (SER) expressions for orthogonal frequency division multiplexing (OFDM) systems with carrier frequency offset (CFO). We consider the performance of an OFDM system subject to CFO error in additive white Gaussian noise (AWGN), frequency flat and frequency selective Rayleigh fading channels. The BER/ SER performances of BPSK and QPSK modulation schemes are analyzed for AWGN and frequency-flat Rayleigh fading channels while BPSK is considered for frequency-selective Rayleigh fading channels. Our results can easily be reduced to the respective analytical error rate expressions for the OFDM systems without CFO error. Furthermore, the simulation results are provided to verify the accuracy of the new error rate expressions.
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an exact error Probability Analysis of ofdm systems with frequency offset
Military Communications Conference, 2006Co-Authors: Prathapasinghe Dharmawansa, Nandana Rajatheva, Hlaing MinnAbstract:In this paper, we derive exact closed form bit error rate (BER) or symbol error rate (SER) expressions for OFDM systems with carrier frequency offset (CFO). We consider the performance of an OFDM system subject to CFO error in frequency flat Rayleigh fading channel with BPSK and 4PSK modulation schemes. Our results can easily be reduced to the respective analytical error rate expressions for the OFDM systems without CFO error. Furthermore, the simulation results are provided to verify the accuracy of the new error rate expressions.
Chin Choy Chai - One of the best experts on this subject based on the ideXlab platform.
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unified error Probability Analysis for generalized selection combining in nakagami fading channels
IEEE Journal on Selected Areas in Communications, 2000Co-Authors: Chin Choy ChaiAbstract:We study generalized selection combining (GSC) schemes in independent Nakagami fading channels, where N diversity branches with the largest instantaneous signal-to-noise ratios (SNRs) are selected from the total of L (N/spl les/L) branches and then coherently or noncoherently combined. We propose two different techniques to derive the moment generating function (MGF) expressions for the GSC output SNR in generalized Nakagami fading channels, where there are distinct and noninteger fading severity parameters, as well as different average SNRs in different diversity branches. For arbitrary fading severity parameter m/sub k/, k=1, /spl middot//spl middot//spl middot/L, the MGF expression is given in a summation of N-dimensional definite integrals with the limits independent of SNR or channel parameters, and therefore can be evaluated very efficiently with numerical methods. Furthermore, for integer m/sub k/ closed-form MGF expressions are derived. Specializations of our results to Rayleigh channels and independent identically distributed (i.i.d.) Nakagami channels are presented, which are either new or equivalent to previously published results. Using the newly derived MGF expression, we provide a unified error Probability Analysis for many coherent and noncoherent modulation/detection schemes.
David Moralesjimenez - One of the best experts on this subject based on the ideXlab platform.
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outage Probability Analysis for η μ fading channels
IEEE Communications Letters, 2010Co-Authors: David Moralesjimenez, Jose F ParisAbstract:In this Letter we derive exact closed-form expressions for the outage Probability (OP) in η-μ fading channels. First, a general expression in terms of the confluent Lauricella function is derived for arbitrary values of μ. Next, we restrict the Analysis to physical η-μ channel models, i.e. to integer values of 2μ, and obtain exact closed-form expressions for the OP in terms of Marcum Q, Bessel and elementary functions. The results in this Letter are applicable to the OP Analysis of maximal ratio combining (MRC) over i.i.d. η-μ or Hoyt fading channels.
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outage Probability Analysis for nakagami q hoyt fading channels under rayleigh interference
IEEE Transactions on Wireless Communications, 2010Co-Authors: Jose F Paris, David MoralesjimenezAbstract:Exact closed-form expressions are obtained for the outage Probability of Nakagami-q (Hoyt) fading channels under co-channel interference (CCI). The scenario considered in this work assumes the joint presence of background white Gaussian noise and independent Rayleigh interferers with arbitrary powers.
