endobj /ParentTree 61 0 R 0 2 Freescale Semiconductor ... is sampled at pilot positions and the channel characteristics between pilots are estimated by interpolation. >> /S /LBody /S /LI /P 62 0 R << At present the common pilot plan are block In this paper, we represent a polynomial interpolation algorithm using the method of Lagrange [10] which greatly reduces the complexity of the transceiver. endobj >> /Pg 57 0 R /K [ 152 0 R ] /P 62 0 R 139 0 R 140 0 R 141 0 R 142 0 R 145 0 R 146 0 R 147 0 R 148 0 R 149 0 R 150 0 R 151 0 R endobj 78 0 R 80 0 R 81 0 R 82 0 R 83 0 R 84 0 R 85 0 R 86 0 R 87 0 R 89 0 R 90 0 R 91 0 R /Pg 57 0 R The proposed method employs lowpass filtering in a transform 169 0 obj >> >> endobj /P 170 0 R >> /P 62 0 R 104 0 obj /K [ 130 0 R ] We investigate pilot-symbol-aided parameter estimation for OFDM systems. Compared with the decision-directed parameter estimator, the pilot-symbol-aided estimator is highly robust to Doppler frequency for dispersive fading channels with noise impairment even though it has some performance degradation for systems with lower Doppler frequencies, A method of estimating the channel transfer function is presented The book mainly focuses on a broadband wireless communication system based on OFDM/OFDMA system because it is widely used in the modern wireless communication system. /K [ 8 ] 152 0 obj What's more, the detail synthetic is done in the initial super-resolution image. INTRODUCTION Orthogonal frequency division multiplexing (OFDM) is a special case of multicarrier transmission and frequency division multiplexing, where … /S /L 122 0 obj endobj >> With the data-aided schemes, pilots or training sequences are inserted in the transmitted signal to estimate the channel response [11][12][13]. /K [ 8 ] Wireless channel estimation in OFDM systems based on collaborative filtering techniques, Frame synchronization, channel estimation scheme and signal compensation using regression method in OFDM systems, Analysis and Simulation of a Digital Mobile Channel Using Orthogonal Frequency Division Multiplexing, B-spline signal processing: Part I-theory and Part II-efficient design, Pilot-symbol-aided channel estimation for OFDM in wireless systems, A Novel channel estimation method for OFDM mobile communication systems based on pilot signals and transform-domain processing, Windowed DFT based pilot-symbol-aided channel estimation for OFDM systems in multipath fading channels, Image data compression using cubic convolution spline interpolation, Two novel transform domain estimation methods for OFDM system and their application environment, A Hybrid Local Virtual Force Algorithm for Sensing Deployment in Wireless Sensor Network, What Can Emergency Medicine Learn From Kinetics: Introducing an Alternative Evaluation and a Universal Criterion Standard for Emergency Department Performance, Detail enhancement for image super-resolution algorithm based on SVD and local self-similarity, Uplink vector channel estimation in ISI-corrupted MC-CDMA system with multiple antennas, A Comparison of DFT and SVD Based Channel Estimation in MIMO OFDM Systems, Adaptive compressed sampling method for fast comuatation of monostatic scattering, Conference: TENCON 2005 2005 IEEE Region 10. /Pg 13 0 R /S /LI 157 0 obj /K [ 153 0 R ] endobj This is a ‘must-have’ resource for engineers and other professionals working with cellular or wireless broadband technologies who need to know how to utilize the new technology to stay ahead of the competition. /S /LBody /S /LI /Pg 31 0 R << This exclusive coverage of the opportunities, technological challenges, solutions, and state of the art of large MIMO systems provides an in-depth discussion of algorithms for large MIMO signal processing, suited for large MIMO signal ... As well as an overview of the issues of developing wireless systems using time-varying channels, the book gives extensive coverage to methods for estimating and equalizing rapidly time-varying channels, including a discussion of training ... /P 160 0 R /Pg 13 0 R /S /P 74 0 obj But what you need to keep in mind is synchronization. Terrestrial Digital Video Broadcasting (DVB-T) is a standard for wireless broadcast of MPEG-2 video. DVB-T is based on channel coding algorithms and uses Orthogonal Frequency Division Multiplexing (OFDM) as a modulation scheme. /K [ 62 0 R ] 146 0 obj << << /S /LBody endobj Adaptive interpolation filtering of a signal in a receiver includes determining at least one correlation function parameter of the channel and determining a filter configuration based on the correlation function parameter. /S /LBody endobj >> 88 0 obj /P 62 0 R 147 0 obj [ 141 0 R 144 0 R 145 0 R 146 0 R 147 0 R 148 0 R 149 0 R 150 0 R 153 0 R 154 0 R << << /P 62 0 R With a first interpolation in time domain the distance for interpolation in frequency domain can be reduced to 2 samples and a delay spread of 5.3ms can be tolerated. /K [ 16 ] >> /S /P 149 0 obj /P 62 0 R /Type /Pages /P 62 0 R /K [ 63 0 R 66 0 R 68 0 R 69 0 R 70 0 R 71 0 R 72 0 R 73 0 R 74 0 R 75 0 R 76 0 R 77 0 R /Pg 13 0 R /S /LI 110 0 obj To achieve higher accuracy of path delay estimation with lower computational complexity, the orthogonal matching pursuit (OMP) method with interpolation algorithm has been adopted for the sparse channel estimation, such as underwater acoustic (UWA) communication channels. This method can reduce the aliasing error of the direct DFT imperative to manage at best the estimation of the channel coefficients; this operation is ensured by the interpolation of pilots. 62 0 obj /S /Figure /K [ 13 ] /Pg 57 0 R /Pg 3 0 R ,,,,,. endobj >> P8J�U����+�Ϙ?�W
�v�|���/�Z��Mt�p���l5V�I��+���S���-2�ˎ&�����y���. /S /LI /S /LI Then the information matrix of high frequency block is decomposed to two sub-spaces by singular value decomposition and the singular value matrix is processed by the soft threshold with a suitable threshold. << 93 0 obj Its simplest formula is provided below: y = y1 + (x−x1)(y2−y1)x2−x1 It is using the coordinates of two given points to find the best fit curve as a straight line. endobj /K [ 2 ] >> Access scientific knowledge from anywhere. /Pg 31 0 R In comb-type pilot based channel estimation, an efficient in-terpolation technique is necessary in order to estimate channelat data sub-carriers by using the channel information at pilotsub-carriers. << /Pg 13 0 R %PDF-1.5 /K [ 23 ] /K [ 102 0 R ] /K [ 18 ] << endobj endobj /P 62 0 R /Pg 13 0 R << endobj /Pg 13 0 R endobj endobj x��]��6�� �C:t���=d���%�,��bQ���a�o����|�b��������o���������ۻ~���������뗫��~���o�J����/�P���Ϫ�̪�&�����_~������_~����~sQ��nS��b
��z;l���\���n���~�w��M���\T��%^��[}���6peK�n�c�^9v���v�t���������f����o���L '!����"$���j�'�fmMYUִ�F)��k��(�~�$ �������z�����ps���m�C�G� ����hɶUV��m����Q��ԓe��2~r���yV��L��6ʬť�9�|�u|�������qS�m�����괣S9�����m�UmLH�fݶY>j[��B#B��l�����Y�ߨb��%Q�!��?���/>��p�y��|����0��_p�jݤd��YU���z����yB��z�����^kP]��6+e��=자v`���.֫b��x� �u���ի@UkҬ����ˇ;����O����Pݲ����?�h��P7��.�w�p������Jezu������Vd:�ě����S��C�'�HG���V��Ww��"���=(�
ε;8�| �;�DIT�:��#���p�p�'� ���s��`���+��߳����(�Sgu�ʳ�n�&�.2J�=�T�4