MIMO OFDM wireless communications with MATLAB

... 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 as...

Ngày tải lên: 13/05/2016, 16:23

... 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...

Ngày tải lên: 18/06/2014, 22:20

... 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...

Ngày tải lên: 20/06/2014, 20:20

... 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 proble...

Ngày tải lên: 20/06/2014, 22:20

... 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 attentio...

Ngày tải lên: 20/06/2014, 22:20

... 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

... 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

... 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 t...

Ngày tải lên: 21/06/2014, 20:20

... 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 di...

Ngày tải lên: 21/06/2014, 23:20

... 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, a...

Ngày tải lên: 22/06/2014, 06:20

... 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, a...

Ngày tải lên: 22/06/2014, 19:20

... 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 n...

Ngày tải lên: 22/06/2014, 22:20