Robust synchronization and channel estimation for MIMO OFDM systems
Robust synchronization and channel estimation for MIMO OFDM systems
... re-modulation is robust to the channel order over -estimation, and the channel estimation identifiability is guaranteed for random channel realization Moreover, the method is applicable for MIMO OFDM systems ... BERs for SISO OFDM under different p 94 ¯ 5.4 Performance NMSEs for MIMO OFDM versus SNR 5.5 Performance NMSEs for MIMO OFDM versus number of snapshots 96 5.6 BERs for MIMO OFDM ... Channel Estimation for MIMO OFDM Systems 72 5.1 Introduction 72 5.2 System Model 74 5.3 Blind Channel Estimation for SISO OFDM Systems...
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Báo cáo hóa học: " Research Article Turbo Processing for Joint Channel Estimation, Synchronization, and Decoding in Coded MIMO-OFDM Systems" pdf
... 21, 24] In this paper, we propose a joint synchronization, channel estimation, and decoding turbo processing scheme for coded MIMO-OFDM systems in the presence of quasistatic multipath channels, ... These interrelations are further explored to develop the turbo joint channel estimation, synchronization, and decoding scheme in Section 4, and the vector RLS-based joint CIR, CFO, and SFO tracking ... mapper P(d; I) Figure 3: Turbo processing for joint channel estimation, synchronization, and decoding is in general not significant However, due to its randomness, using a random matrix may give...
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A Study of Channel Estimation for OFDM Systems and System Capacity for MIMO-OFDM Systems
... that is system capacity In Chapter 5, the MIMO -OFDM system capacity with imperfect feedback channel is investigated In Chapter 6, the capacity variances for OFDM systems over Rayleigh and Ricean ... 6) Chapter 2: OFDM systems and MIMO systems Since the thesis studies the channel estimation for OFDM systems and system capacity for MIMO -OFDM systems, this chapter briefly introduces the background ... for OFDM systems 21 2.2.2 Peak-to-Average (PAR) of OFDM systems 30 2.2.3 Channel estimation for OFDM systems 33 2.2.4 Synchronization of OFDM systems 38 2.2.5 Advantages...
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Blind channel estimation for MIMO OFDM communication systems
... this thesis is the development of three blind channel estimation and one blind source separation algorithms for MIMO- OFDM systems The first proposed channel estimation algorithm is a subspace based ... BLIND CHANNEL ESTIMATION FOR MIMO OFDM COMMUNICATION SYSTEMS CHEN XI (M.Sc., National University of Singapore, Singapore) A THESIS SUBMITTED FOR THE DEGREE OF DOCTOR ... transferred to a number of parallel flat-fading MIMO channels [6] • In Chapter 3, we present a novel subspace based blind channel estimation algorithm for MIMO- OFDM systems driven by either white or colored...
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Transmit and receive techniques for MIMO OFDM systems
... for a MIMO- OFDM system in wideband frequency selective MIMO channels, and more specifically the appropriate spacetime precoding schemes and transmitter and receiver designs for a MIMO- OFDM system ... near-optimal capacity and diversity performance in MIMO- OFDM channels, optimal and efficient detection and decoding of transmitted sequence at the receiver, and optimal training signal design and low-complexity ... concerned in general with the transmit and receive techniques for multiple-input multiple-output (MIMO) orthogonal frequency-division multiplexing (OFDM) systems in wideband frequency selective fading...
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Báo cáo hóa học: " Adaptive low-rank channel estimation for multiband OFDM ultra-wideband communications" pptx
... al, MultiBand OFDM Physical Layer Proposal for IEEE802.15.3a MultiBand OFDM Alliance SIG (2004) A Batra, J Balakrishnan, GR Aiello, JR Foerster, A Dabak, Design of a multiband OFDM system for ... WF performance Conclusion In this paper, an adaptive FIC RR-WF channel estimation algorithm is proposed for the MB -OFDM UWB communication systems This RR-WF-based algorithm employs an adaptive ... http://asp.eurasipjournals.com/content/2011/1/64 In this paper, an adaptive low-rank channel estimation scheme based on the Wiener filtering (WF) technique is proposed for MB -OFDM UWB communication systems This reduced-rank...
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báo cáo hóa học: " Adaptive low-rank channel estimation for multiband OFDM ultra-wideband communications" docx
... al, MultiBand OFDM Physical Layer Proposal for IEEE802.15.3a MultiBand OFDM Alliance SIG (2004) A Batra, J Balakrishnan, GR Aiello, JR Foerster, A Dabak, Design of a multiband OFDM system for ... WF performance Conclusion In this paper, an adaptive FIC RR-WF channel estimation algorithm is proposed for the MB -OFDM UWB communication systems This RR-WF-based algorithm employs an adaptive ... http://asp.eurasipjournals.com/content/2011/1/64 In this paper, an adaptive low-rank channel estimation scheme based on the Wiener filtering (WF) technique is proposed for MB -OFDM UWB communication systems This reduced-rank...
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Báo cáo hóa học: " Research Article Reduced-Rank Shift-Invariant Technique and Its Application for Synchronization and Channel Identification in UWB Systems" potx
... shiftinvariant algorithms, and investigate their applications in joint synchronization and channel identification for UWB signals These p-rank algorithms will be referred to as reduced-rank identification ... The performance can act as a basis for evaluating the performance loss in many applications of RIPC algorithms Simulation results of the joint synchronization and channel identification for UWB signals ... Communications and Networking using the SVD, and the original GED in a larger space is transformed into that in a relatively smaller space This is an application of rank reduction techniques Rank...
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Báo cáo hóa học: " Research Article Automatic IP Generation of FFT/IFFT Processors with Word-Length Optimization for MIMO-OFDM Systems" doc
... FFT processors and aim to offer an FFT IP generator that has the capability of automatic wordlength optimization to achieve hardware efficiency The IP generator can generate the hardware description ... used in advanced systems With our proposed architecture, the advantage is twofold On one hand, the same control flow as the one needed for generation of multiple-channel FFT processors can be shared ... number of ip- flops is related with the pipeline registers and short delay buffers, while the number of slices reflects the logic complexity including distributed RAMs for long delay buffers and ROMs for...
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Báo cáo hóa học: " Research Article Modified Spatial Channel Model for MIMO Wireless Systems" ppt
... matrix at the RX side is given by SPATIAL CHANNEL MODELLING The 3GPP SCM model is serving as the basis for evaluation of MIMO performance of candidate MIMO concepts for UMTS [4] In the following ... 3GPP SCM model and the modified SCM for a × MIMO case In each case of comparison, the RMS angular spreads of the basic and modified SCM models were set to be equal Thus, at least two channel parameters ... real MIMO channel due to its static modeling of the subpaths In order to achieve a better match with the measured channels from the capacity point of view, a slightly different modeling of the spatial...
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Decoupled maximum likelihood carrier frequency offset estimator for MIMO OFDM systems
... is reduced when carrier frequency offset exsists Hence the performance of the OFDM systems is degraded In order to improve the performance of OFDM systems, the carrier frequency offset must be ... receiver (MIMO) technology in combination with OFDM, i.e., MIMO- OFDM, therefore becomes an attractive solution for future broadband wireless systems Similar to SISO -OFDM systems, MIMO- OFDM systems ... introduced and compared Performance of the proposed DEML (Decoupled Maximum Likelihood) blind carrier offset estimator for SISO -OFDM and MIMO- OFDM systems is analyzed in Chapter and Chapter 5, respectively...
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Iterative receiver design for MIMO OFDM systems via sequential monte carlo (SMC) techniques
... …………………………………………………… 47 3.6 Sequential Monte Carlo Methods …………………………… 51 2.3.2 2.3.3 Iterative Receiver Design for MIMO- OFDM Systems via Sequential Monte Carlo (SMC) techniques ………………………… 53 ... ITERATIVE RECEIVER DESIGN FOR MIMO- OFDM SYSTEMS VIA SEQUENTIAL MONTE CARLO (SMC) TECHNIQUES BAY LAY KHIM (B.Eng.(Hons.), NUS) A THESIS SUBMITTED FOR THE DEGREE OF MASTER ... 84 Iterative Receiver Design for MIMO- OFDM Systems via SMC Techniques with Pilot Aided Channel Estimation (PACE) ………… 86 5.1 Background …………………………………………………… 86 5.2 System Model of Coded MIMO- OFDM...
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Báo cáo hóa học: " Research Article Bit Error Rate Approximation of MIMO-OFDM Systems with Carrier Frequency Offset and Channel Estimation Errors" ppt
... SISO-OFDM The BER is degraded due to the frequency offset and channel estimation errors For a fixed channel estimation variance error σΔH , a larger variance of frequency offset estimation error, ... 1025– 1030, 2009 [32] Z Zhang, W Zhang, and C Tellambura, “BER of MIMOOFDM systems with carrier frequency offset and channel estimation errors,” in Proceedings of IEEE International Conference on ... function of the second-order statistics of the channel and frequency offset estimation errors (although the interference also comprises the fourth-order statistics of the frequency offset estimation errors,...
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Báo cáo hóa học: " Research Article An ML-Based Estimate and the Cramer-Rao Bound for Data-Aided Channel Estimation in KSP-OFDM" pdf
... necessary and sufficient information to estimate the channel Therefore, the observations that are used to estimate the channel in CPOFDM and ZP-OFDM are the FFT outputs corresponding to the pilot ... signal, and then the N samples from the data part are applied to an FFT, while the guard interval samples are not transformed In both cases, the used transform is an invertible linear transformation ... can be safely ignored when estimating the channel Further, we have compared the MSE of the subset estimator with the obtained GCRB and with the MSE of the ML-based channel estimator from [8] The...
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Báo cáo hóa học: " Channel Estimation and Data Detection for MIMO Systems under Spatially and Temporally Colored Interference" potx
... columns of a fast Fourier transform (FFT) matrix For a nonsingular spatial interference correlation matrix, we set N ≤ r L Channel Estimation and Data Detection for MIMO Systems 691 [16] to guarantee ... in channel estimation and data detection (a) perfectly known channel parameters and interference statistics, with one-vector-symbol (curve 1) and twovector-symbol (curve 2) detection; (b) channel ... of Electrical and Computer Engineering, Queen’s University, Kingston, Ontario, Canada, 2003 Channel Estimation and Data Detection for MIMO Systems [21] S B¨ ro, G Bauch, A Pavlic, and A Semmler,...
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