Low complexity frequency synchronization for wireless OFDM systems

... significant performance degradation for MIMO -OFDM and multi-user 1.4 Status and Challenges in CFO estimation for OFDM systems 27 MIMO -OFDM systems Therefore, to guarantee good performance of OFDM systems, ... Summary Summary Low- Complexity Frequency Synchronization for Wireless OFDM Systems The Orthogonal Frequency Division Multiplexing (OFDM) system provides...

Ngày tải lên: 14/09/2015, 08:40

... near-optimal performance for the MIMO systems with a small number of antennas In the systems with a large number of antennas, we can achieve even higher complexity reduction without significant performance ... 1983) doi:10.1186/1687-1499-2011-6 Cite this article as: Bae and Lee: Low complexity antenna selection for V-BLAST systems with OSIC detection EURASIP Jour...

Ngày tải lên: 21/06/2014, 03:20

... partitioning training and data in such a way that they will emerge from the channel (almost) orthogonal Specifically, as proposed in [15] for time-domain training, and in [14] for the frequency-domain ... different Doppler spreads CONCLUSIONS In this paper, we have designed banded MMSE equalizers for OFDM systems in high Doppler spread channels Thanks to a band LDL...

Ngày tải lên: 22/06/2014, 23:20

... an open-loop MIMO OFDM-CDMA scheme using space-timefrequency spreading (STFS), in the presence of frequency-selective Rayleigh-fading channel The BER and BLER performance of the OFDM-CDMA system ... scheduling In addition, it offers better diversity/multiplexing trade-off The performance of MIMO OFDM–CDMA scheme using STFdomain spreading is investigated with zero-forcing...

Ngày tải lên: 18/06/2014, 22:20

... N c , the OFDM-CDMA 60 Proposed OFDM-CDMA 2D OFDM-CDMA Number of Users 50 40 30 20 10 0 10 12 14 16 SNR dB Figure 10 System throughput comparison for OFDM-CDMA system with 4Tx, 4Rx of the proposed ... scheduling In addition, it offers better diversity/multiplexing trade-off The performance of MIMO OFDM-CDMA scheme using STF-domain spreading is investigated with zero-fo...

Ngày tải lên: 20/06/2014, 21:20

... IMT-2000 and systems beyond IMT-2000,” June 2003 [2] IEEE 802.16e-2005, “IEEE standard for local and metropolitan area networks—part 16: air interface for fixed and mobile broadband wireless access systems, ... milliseconds for TSPS and PFS, and 15 milliseconds for the b2 PFS Furthermore, the packet loss rate for each scheme is 0% for the TSPS, 1.6 · 10−3 % for the...

Ngày tải lên: 21/06/2014, 23:20

... approximate implementation offers very good performance at linear complexity Thus, the latter low complexity equalization algorithm is suitable for high data- rate wireless communication systems with limited ... [18]) Figures and demonstrate the performance of various receivers performing turbo equalization for the aforementioned channels The cases shown correspond to (a...

Ngày tải lên: 22/06/2014, 22:20

... 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

... 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

... 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

... al, MultiBand OFDM Physical Layer Proposal for IEEE802.15.3a MultiBand OFDM Alliance SIG (2004) A Batra, J Balakrishnan, GR Aiello, JR Foerster, A Dabak, Design of a multiband OFDM system for ... WF performance Conclusion In this paper, an adaptive FIC RR-WF channel estimation algorithm is proposed for the MB -OFDM UWB communication systems This RR-WF-based algorithm...

Ngày tải lên: 20/06/2014, 22:20

... al, MultiBand OFDM Physical Layer Proposal for IEEE802.15.3a MultiBand OFDM Alliance SIG (2004) A Batra, J Balakrishnan, GR Aiello, JR Foerster, A Dabak, Design of a multiband OFDM system for ... WF performance Conclusion In this paper, an adaptive FIC RR-WF channel estimation algorithm is proposed for the MB -OFDM UWB communication systems This RR-WF-based algorithm...

Ngày tải lên: 21/06/2014, 00:20

... the phase offset of the channel The proposed method of blind estimation of the phase offset is based on a MAP approach in the sense of maximizing the probability that a phase θ corresponds to the ... denotes the number of rows in the parity check matrix of the code, uk is the number of nonzero elements in the kth row of the parity check matrix...

Ngày tải lên: 21/06/2014, 08:20

... 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