Low cost blind carrier frequency offset estimator for mimo multicarrier 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 sy...

Ngày tải lên: 20/11/2012, 11:28

... Communications and Networking were conducted to evaluate the performance of the CFO estimation using CAZAC sequences We first compare the performance using CAZAC sequences with the performance using two ... the performance of the CFO estimation using CAZAC sequences and demonstrate the performance gain achieved by using the optimal training sequences In the si...

Ngày tải lên: 21/06/2014, 05:20

... 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 p...

Ngày tải lên: 21/06/2014, 08:20

... performance of optical OFDM The nonlinear characteristic of an LED imposes limitations on the performance of indoor DOW systems when using intensity modulation with both ACOOFDM and DC-biased OFDM ... “Comparison of asymmetrically clipped optical OFDM and DC-biased optical OFDM in AWGN,” vol 12, no 5, pp 343–345 [10] H Elgala, R Mesleh, and H Haas, “A study of LED nonlinearity...

Ngày tải lên: 21/06/2014, 08:20

... 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...

Ngày tải lên: 21/06/2014, 11:20

... on SINR for hexagonal multicarrier system channel spread factor on the performance of SINR in hexagonal multicarrier modulation systems are further discussed The exact SINR expression versus insufficient ... and channel spread factor on the performance of SINR in hexagonal multicarrier modulation systems are further discussed The exact SINR ex...

Ngày tải lên: 21/06/2014, 22:20

... 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 l...

Ngày tải lên: 22/06/2014, 06:20

... CDMA systems [14, 15, 18] However, MC -CDMA systems have not been examined in such studies In this paper, the reverse link of an MC -CDMA system with the beamforming technique in the presence of ... , (13) In this section, the outage probability of MC -CDMA systems in the presence of CFO with perfect beamforming is evaluated To start t...

Ngày tải lên: 22/06/2014, 19:20

... standardcompatible frequency estimation and I/Q imbalance compensation algorithms by using the preamble defined in IEEE 802.11a [6, 9] A system model with the carrier frequency offset and I/Q imbalance ... presented a low-cost and preambleaided algorithm for the estimation/ compensation of carrier frequency offset and I/Q imbalance in OFDM systems It has...

Ngày tải lên: 22/06/2014, 20:20

... In this paper, we have examined the performance of the minimum output variance (MOV) estimator in OFDM systems The variance and the expectation of the output magnitude have been derived for the ... but the CFO causes the uncertainty of the output More frequency offset causes more uncertainties and thus, the variance of the output |dk | in...

Ngày tải lên: 22/06/2014, 23:20

... derivation of stochastic CRB for Bayesian approach Figure 8: MSE as a function of KL expansion coefficients Since the actual channel statistics and SNR may vary within OFDM block, we have also analyzed ... η (A. 2) Low-Complexity KL Expansion-Based Channel Estimator for OFDM and then the average Bayesian MSE is 173 For the real channel, data model in (10) can be rewri...

Ngày tải lên: 23/06/2014, 00:20

... This paper analyzed the performance of a class of non-dataaided feedforward carrier frequency offset estimators for linearly modulated QAM- signals It is shown that this class of cyclic frequency ... for conjugation and conjugate transposition, respectively The notations “re” and “im” stand for the real and imaginary parts, respectively Non-Data-Aided Feedforward Carrie...

Ngày tải lên: 23/06/2014, 01:20

... two flexible and compatible SNP genotyping platforms: TaqMan SNP genotyping assays and the SNPlex genotyping system Mutat Res 2005, 573:111-135 Chen X, Levine L, Kwok PY: Fluorescence polarization ... oligonucleotides only match the major allele at this secondary SNP Thus, a secondary SNP could cause the entire genotyping assay to fail, or in double heterozygotes for the que...

Ngày tải lên: 14/08/2014, 15:20

... 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...

Ngày tải lên: 04/10/2015, 10:26

... Summary……………………………………………………………….….44 iv Low- cost Blind CFO Estimator for MIMO Multicarrier Systems …… …45 5.1 Introduction……………………………………………………………… 45 5.2 MIMO Multicarrier System Model…………………………………… …46 5.3 Blind CFO Estimator ……………………………………………… ... existing blind CFO estimation algorithm with high computational cost to a low- cost estimator for multicarrier...

Ngày tải lên: 10/11/2015, 11:28