MIMO OFDM wireless communications with MATLAB

Antenna selection for energy efficient MIMO OFDM wireless systems

Antenna selection for energy   efficient MIMO   OFDM wireless systems
... 27 2.3.3 Energy- efficiency metric 29 2.4 Antenna selection for MIMO- OFDM wireless systems 30 2.4.1 Antenna selection 31 2.4.2 Antenna selection for OFDM systems ... for MIMO- OFDM systems 2.4 Antenna Selection for MIMO- OFDM Wireless Systems In this section, antenna selection MIMO techniques are introduced At first, several important aspects in antenna selection ... investigates antenna selection strategies for MIMO- OFDM wireless systems from an energy efficiency perspective Closed-form expressions of energy efficiency in MIMO- OFDM systems that deploy conventional antenna...
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Báo cáo sinh học: "MAC and baseband processors for RF-MIMO WLAN EURASIP Journal on Wireless Communications and " doc

Báo cáo sinh học:
... power consumption and costs of the conventional MIMO approaches [1] limit applications for ubiquitous networks A low-power and low-cost RF-MIMO (MIMAX) system for maximum reliability and performance ... possible to perform all relevant control and configuration commands for every station The baseband board was used for the real-time tests of the MIMAX baseband processor in several setups First, ... MAC functions is described in Section The baseband architecture is presented in Section Functional modules of the baseband processor are described in Sections 5, and The implementation details...
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báo cáo hóa học:" MAC and baseband processors for RF-MIMO WLAN EURASIP Journal on Wireless Communications and Networking" pdf

báo cáo hóa học:
... power consumption and costs of the conventional MIMO approaches [1] limit applications for ubiquitous networks A low-power and low-cost RF-MIMO (MIMAX) system for maximum reliability and performance ... possible to perform all relevant control and configuration commands for every station The baseband board was used for the real-time tests of the MIMAX baseband processor in several setups First, ... the stability and robustness of the MAC and baseband processors, as well as the WLAN driver software in real-time conditions Moreover, the signal quality (constellation diagram) and data throughput...
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Báo cáo toán học: " Recursive analytical performance evaluation of broadcast protocols with silencing: application to VANETs EURASIP Journal on Wireless Communications and " pptx

Báo cáo toán học:
... Recursive analytical performance evaluation of broadcast protocols with silencing: application to VANETs Stefano Busanelli∗ , Gianluigi Ferrari and Roberto Gruppini Department of Information ... performance of the novel probabilistic broadcast protocols is investigated and compared with that of other (known) protocols Finally, Section concludes the article 2.1 Multihop broadcast protocols ... a function of ρs z, in Figure 8a, and the following considerations can be drawn: (i) g ∗ is an increasing monotonic function of ρs z; (ii) with the exception of the region in proximity to ρs z...
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Báo cáo hóa học: " Precoding and Transmitter-Side processing techniques for multiuser MIMO OFDM systems with special emphasis on the PAPR problem" pdf

Báo cáo hóa học:
... Wunder et al.: Precoding and Transmitter-Side processing techniques for multiuser MIMO OFDM systems with special emphasis on the PAPR problem EURASIP Journal on Advances in Signal Processing 2011 ... combined with basis selection algorithm for PAPR reduction Similarly, in the multiuser MIMO OFDM uplink with DFT pre-coding, the joint problem of maximum throughput and PAPR reduction is tackled in the ... fundamental bounds on the potential gains due to coding for the PAPR problem The analysis of an alternative metric instead of PAPR is the topic of the paper On the EVM Computation of Arbitrary...
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Báo cáo hóa học: " Identifying time-varying channels with aid of pilots for MIMO-OFDM" potx

Báo cáo hóa học:
... the rank of R−1 increases with ˜ the number of receive antennas, the number of pilot OFDM symbols as well as the number of pilots within the OFDM symbol, but decreases with the number of transmit ... but only for time-invariant channels or systems for which the time variation of the channel within one OFDM symbol can be neglected Except for [7,11], much less attention has been paid to systems ... R−1 also increases with the ˜ number of pilot OFDM symbols Comparing Figure with 3, we can indeed observe a performance improvement However, for faster fading channels, multiple OFDM symbols work...
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Báo cáo hóa học: " Research Article Automatic IP Generation of FFT/IFFT Processors with Word-Length Optimization for MIMO-OFDM Systems" doc

Báo cáo hóa học:
... 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 processors can be shared ... number of ip- flops is related with the pipeline registers and short delay buffers, while the number of slices reflects the logic complexity including distributed RAMs for long delay buffers and ROMs for...
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Báo cáo hóa học: " Research Article Bit Error Rate Approximation of MIMO-OFDM Systems with Carrier Frequency Offset and Channel Estimation Errors" ppt

Báo cáo hóa học:
... 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 of IEEE International Conference on ... function of the second-order statistics of the channel and frequency offset estimation errors (although the interference also comprises the fourth-order statistics of the frequency offset estimation errors,...
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báo cáo hóa học:" Recursive analytical performance evaluation of broadcast protocols with silencing: application to VANETs EURASIP Journal on Wireless Communications and Networking 2012, 2012:10 " potx

báo cáo hóa học:
... Recursive analytical performance evaluation of broadcast protocols with silencing: application to VANETs Stefano Busanelli∗ , Gianluigi Ferrari and Roberto Gruppini Department of Information ... performance of the novel probabilistic broadcast protocols is investigated and compared with that of other (known) protocols Finally, Section concludes the article 2.1 Multihop broadcast protocols ... a function of ρs z, in Figure 8a, and the following considerations can be drawn: (i) g ∗ is an increasing monotonic function of ρs z; (ii) with the exception of the region in proximity to ρs z...
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báo cáo hóa học:" Research Article Space-Frequency Block Code with Matched Rotation for MIMO-OFDM System with Limited Feedback" pdf

báo cáo hóa học:
... MIMO-OFDM subsystem For a multiuser scenario, each user can be allocated one or more MIMO-OFDM subsystems depending on the system complexity and requirement The block diagram of a MIMO-OFDM system ... MIMO-OFDM system typically is partitioned into Ns MIMO-OFDM subsystems where Ns ≥ It is pointed out in [28] that the MIMOOFDM system capacity with grouping can approach the channel capacity without ... 40 20 Figure 6: Performance of the rate one MRP and the SFBC in [12] for the MIMO-OFDM system with Nt = 2, Nr = 1, Nc = 512, and δ = 128 in the propagation scenario with uniform PDP of two paths...
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Báo cáo hóa học: "Research Article On MIMO-OFDM with Coding and Loading" docx

Báo cáo hóa học:
... schemes and describes the proposed modification for bit-loaded VBLAST Section presents the simulation results, and finally conclusions are drawn in Section The OFDM system under consideration is ... transposition) Denoting xk the NT -dimensional vector transmitted over NT antennas and subcarrier k, ≤ k < N, and assuming standard OFDM transmission and reception, the corresponding NR dimensional ... communications,” in Proceedings of the 6th IEE International Conference on 3G and Beyond, pp 9–12, London, UK, November 2005 [10] R Zhang and J M Cioffi, “CTH03-6: approaching MIMOOFDM capacity with...
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Báo cáo hóa học: " Research Article An Efficient Differential MIMO-OFDM Scheme with Coordinate Interleaving" pdf

Báo cáo hóa học:
... Therefore, a1 and −a∗ are transmitted from the first transmit an2 tenna, and a2 and a∗ are transmitted from the second trans1 mit antenna during the first and second transmission periods, respectively ... channel gains corresponding to two transmit antennas with h1 and h2 , respectively Let the dummy symbols to be transmitted during the first two transmission periods be a1 and a2 Therefore, a1 and ... technique with CIOD is not possible due to nonconstant modulus of coordinate interleaved signal constellation Let us assume a quasistatic fading channel with two transmit and one receive antennas, and...
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Báo cáo hóa học: " Research Article SmartMIMO: An Energy-Aware Adaptive MIMO-OFDM Radio Link Control for Next-Generation Wireless Local Area Networks" docx

Báo cáo hóa học:
... ratio (SNR), the normalized instantaneous channel response H, and the multiantenna encoding The instantaneous capacity can be easily derived for the different multiantenna encoding Practically, ... the (flat) chan11 nel response between the single active transmit antenna and the single active receive antenna for the subcarrier n (including transmit and receive filters) The instantaneous capacity ... channel can be reduced to equivalent SISO channel corresponding to the quadratic average of the subchannels between each pairs of transmit and receive antennas [3] The instantaneous capacity can...
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Báo cáo hóa học: " Research Article An Efficient Differential MIMO-OFDM Scheme with Coordinate Interleaving" pptx

Báo cáo hóa học:
... Therefore, a1 and −a∗ are transmitted from the first transmit an2 tenna, and a2 and a∗ are transmitted from the second trans1 mit antenna during the first and second transmission periods, respectively ... channel gains corresponding to two transmit antennas with h1 and h2 , respectively Let the dummy symbols to be transmitted during the first two transmission periods be a1 and a2 Therefore, a1 and ... technique with CIOD is not possible due to nonconstant modulus of coordinate interleaved signal constellation Let us assume a quasistatic fading channel with two transmit and one receive antennas, and...
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Báo cáo hóa học: " Relay Techniques for MIMO Wireless Networks with Multiple Source and Destination Pairs" potx

Báo cáo hóa học:
... comprising a source node with LM transmit antennas, a relay node with KN antennas, and a destination node with LM antennas In this case, the power constraints at the source and relay are LP and KP, ... k (3) MIMO RELAY TECHNIQUES In this paper, we assume that each relay node knows the CSI of its own backward and forward channels However, we not allow source nodes, relay nodes, and destination ... interests cover the wireless network systems, relay networks, multiple- input and multiple- output (MIMO) transmission, and information theory issues He is a Member of IEEE and IEICE Takahiro Asai...
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