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 FO...

Ngày tải lên: 12/09/2015, 09:39

... 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...

Ngày tải lên: 21/06/2014, 23:20

... 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 jo...

Ngày tải lên: 08/11/2015, 17:17

... 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 equalizat...

Ngày tải lên: 21/06/2014, 16:20

... 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 f...

Ngày tải lên: 22/06/2014, 22:20

... 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-s...

Ngày tải lên: 23/06/2014, 01:20

... 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...

Ngày tải lên: 03/10/2015, 11:37

... 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,...

Ngày tải lên: 21/06/2014, 00:20

... 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...

Ngày tải lên: 21/06/2014, 17:20

... “Secure and reliable wide-area power- line communication for soft-real-time applications within REMPLI,” in Proceedings of the 9th International Symposium on Power Line Communications and Its Applications ... Ferreira, “Automotive power- line communications: favourable topology for future automotive electronic trends,” in Proceedings of the 7th International Symposium on Powe...

Ngày tải lên: 22/06/2014, 19:20

... present paper, an adaptive near-far robust synchronization array detector for space-time asynchronous DS-CDMA signals is developed The primary requirement needed for the proposed timing synchronization ... scheme with other timing estimation techniques is also evaluated in Section Finally, concluding remarks are given in Section Computationally Efficient Blind Code Synchr...

Ngày tải lên: 23/06/2014, 01:20

... 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 vect...

Ngày tải lên: 21/06/2014, 23:20

... 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 snap...

Ngày tải lên: 14/09/2015, 11:54

... 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 sy...

Ngày tải lên: 20/11/2012, 11:28

... 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 a...

Ngày tải lên: 21/06/2014, 03:20