Joint channel estimation and OFDM synchronization in multipath fading

... 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

... 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

... 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

... 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

... 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

... 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-QA...

Ngày tải lên: 21/06/2014, 20:20

... 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

... 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

... 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 computin...

Ngày tải lên: 22/06/2014, 19:20

... 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

... 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 Outst...

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

... 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

... 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

... 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