Joint channel estimation and OFDM synchronization in multipath fading
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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Báo cáo hóa học: "Channel length assisted symbol synchronization for OFDM systems in multipath fading channels" potx
... Cite this article as: Chin: Channel length assisted symbol synchronization for OFDM systems in multipath fading channels EURASIP Journal on Wireless Communications and Networking 2011 2011:68 Received: ... Chen, A blind synchronizer for OFDM systems based on SINR maximization in multipath fading channels IEEE Trans Veh Technol 58(2), 625–635 (2009) 19 WL Chin, SG Chen, A low-complexity minimum-interference ... explicitly in this work This work presents a new synchronization algorithm, assisted by channel length information, for OFDM systems based on the redundancy of CP ISI significantly increases with symbol...
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Báo cáo hóa học: " Preamble and pilot symbol design for channel estimation in OFDM systems with null subcarriers" pdf
... band are set to be null, i.e., no information is sent [12] The presence of null subcarriers complicates the design of both the training preamble for channel estimation and pilot symbols for pilot- aided ... a candidate for pilot symbols design in OFDM systems with null subcarriers VII Conclusion We have addressed the design of optimal preamble as well as suboptimal pilot symbols for channel estimation ... norm-based design for the preamble as well as for the pilot symbol design Next, we consider pilot symbol design for IEEE 802.16e by minimizing the LS channel estimate MSE Figure shows the designed pilot...
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Báo cáo sinh học: " Research Article Iterative Frequency-Domain Channel Estimation and Equalization for Ultra-Wideband Systems with Short Cyclic Prefix" pot
... Receiver performance over different channel models, for CP = and channel estimation with pilot blocks when the channel estimation is performed with the IBI cancellation, the reduction in IBI for CP ... the synchronization errors, channel estimation errors , and as well as the derivation of analytical performance bounds for the channel estimation and equalization with IBI cancellation 8 EURASIP ... 2: Performance of FD channel estimation with and without IBI cancellation, number of pulse repetition = block size = 160 symbols (640 chips), max CM4 UWB channel, channel length = 360, and taps...
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Báo cáo hóa học: "Research Article A Novel Quantize-and-Forward Cooperative System: Channel Estimation and M-PSK Detection Performance" potx
... vol 2007, Article ID 20258, 11 pages, 2007 [8] A Chakrabarti, A de Baynast, A Sabharwal, and B Aazhang, “LDPC codedesign for the relay channel, ” IEEE Journal on Selected Areas in Communications, ... compared, assuming the relay and the destination are known to all relevant channel parameters In order to achieve a fair comparison between noncooperative communication and a cooperative system, ... estimates, the EM algorithm can be used The EM algorithm is an iterative algorithm that alternates between an estimation step and a maximization step It allows calculating a ML estimate of a set...
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Báo cáo hóa học: " Research Article Degenerated-Inverse-Matrix-Based Channel Estimation for OFDM Systems" pdf
... pilot-aided channel estimation methods for OFDM systems,” IEEE Transactions on Signal Processing, vol 49, no 12, pp 3065–3073, 2001 [5] G Auer, A Dammann, and S Sand, Channel estimation for OFDM systems ... 1) Figure 5: NMSE performance with σ/T = 0.123 and fd T =0.0075 Figure 7: BER performance with 64-QAM -OFDM We can see that the DIME achieved a good performance for 16-QAM -OFDM, degradation within ... averaging in the frequency domain, employed for ZF-FAV, had a certain effect on 16-QAM -OFDM but had no effect on 64-QAM -OFDM For 16-QAM -OFDM the performance gain of the DIME relative to ZF-FAV...
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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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Báo cáo hóa học: "Research Article Linearly Time-Varying Channel Estimation and Symbol Detection for OFDMA Uplink Using " potx
... multiple OFDMA symbols We also present a performance analysis of the channel estimation approach and derive a closed-form expression for the channel estimation variances It is shown that the estimation ... abovementioned information sequence interference over multiple OFDMA symbols, and thus overcoming the shortcoming of conventional ST-based schemes for linearly time-varying channel estimation We ... target symbol, but also the OFDMA symbols over the whole frame are invoked for channel estimation On the other hand, the proposed ST-based approach can be utilized to estimate the uplink channel...
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Báo cáo hóa học: " Research Article Maximum Likelihood Timing and Carrier Synchronization in Burst-Mode Satellite Transmissions" pot
... Once ν has been obtained, timing and phase estimates are computed in closed form as indicated in (21) and (22), respectively In summary, the difficult and time-consuming part in the estimation of ... of two FFTs instead of a single FFT In addition to carrier synchronization, however, the MLE also provides timing recovery Actually, from (16) and (21) we see that computing the timing estimate ... the joint ML estimation of the carrier frequency, timing error, and carrier phase in burst-mode satellite transmissions Thanks to a suitably designed pilot pattern composed of alternating binary...
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Báo cáo hóa học: " Multipass Channel Estimation and Joint Multiuser Detection and Equalization for MIMO Long-Code DS/CDMA Systems" potx
... signal model for the considered multiuser longcode CDMA MIMO system Sections and are devoted to the synthesis of multiuser MIMO channel estimation techniques and of MIMO multiuser detection algorithms, ... perfect knowledge of the channel vectors SNR (dB) ⎤∗ ⎤∗ 10−2 CONCLUSIONS In this paper the issue of joint channel estimation and multiuser detection for long-code MIMO DS/CDMA systems operating ... proposed, formerly for single-user systems [13, 14], and then for multiuser systems [15, 16] In particular, the paper [16] develops subspace-based blind adaptive multiuser detectors for short-code DS/CDMA...
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Báo cáo hóa học: " Joint Frequency Ambiguity Resolution and Accurate Timing Estimation in OFDM Systems with Multipath Fading" doc
... MAXIMUM-LIKELIHOOD ESTIMATION USING FAST FOURIER TRANSFORM In this section, the ML principle is applied to derive an algorithm for jointly estimating the timing and IFO The joint estimation problem in the ... filtering, and neural network learning theory and applications He received the Outstanding Youth Award of the Ministry of Electronic Industry and Guanxi Province Outstanding Teacher Award, China, in ... under multipath fading The organization of this paper is as follows The signal model of OFDM is introduced in Section In Section 3, the algorithm for joint timing and IFO estimation using FFT...
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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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Channel estimation and synchronization for OFDM and OFDMA systems
... 1.3.1 Channel Estimation in OFDM Systems 1.3.2 Phase Error Suppression for Multi-Band OFDM- UWB Systems 1.3.3 CFO Estimation for SISO -OFDMA and MIMO -OFDMA Uplink 1.4 ... CHANNEL ESTIMATION AND SYNCHRONIZATION FOR OFDM AND OFDMA SYSTEMS WANG ZHONGJUN (M Eng., National University of Singapore) (M Sc., Shanghai Jiao Tong University) A THESIS SUBMITTED FOR THE ... coded OFDM (COFDM) systems in the literature Channel estimation for OFDM is seldom performed in time-domain due to the multi-carrier nature of OFDM systems 1.3 Contributions of This Thesis track channel...
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Channel estimation and detection for multi input multi output (MIMO) systems
... 33 Channel Estimation and Detection for MIMO systems 4.1 Decouple Maximum Likelihood (DEML) 4.2 Channel estimation and Detection for quasi-static flat fading 34 34 channels ... 4.2.2 Channel estimation 38 4.2.3 Symbol Detection 39 v 4.3 4.4 4.5 Channel estimation and detection for quasi-static frequency selective fading channels ... 40 4.3.2 Channel estimation 44 4.3.3 Symbol Detection 44 Channel estimation and detection for flat fast fading channels 46 4.4.1 Sytem...
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Joint channel estimation and OFDM synchronization in multipath fading
... JOINT CHANNEL ESTIMATION AND OFDM SYNCHRONIZATION IN MULTIPATH FADING LIM WEI CHEE (B Eng (Hons.), NUS) A THESIS SUBMITTED FOR THE DEGREE OF MASTER OF ENGINEERING DEPARTMENT OF ELECTRICAL AND ... varies in gain and phase across the spectrum of the transmitted signal, thus resulting in time varying distortion in the received signal In this thesis, we developed joint channel estimation and synchronization ... fl , channel gain αl and the channel phase φl are no longer time-varying but constant within the symbol duration when the transmission channel is slowfading In this thesis, slow fading channel...
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