Modeling ordered subcarrier SNR in MIMO-OFDM wireless links

Daniels, Robert C.

doi:10.1016/j.phycom.2011.10.001

Cited by 31 publications

(5 citation statements)

References 42 publications

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“…Hence, if independent data is transmitted from TX 1 and TX 2, respectively (as through spatial multiplexing), two independent and parallel links are observed from a single radio, each with their own SNR. If equal power is allocated to each transmit antenna, this configuration is optimal [8]. Assuming fixed Frobenius norm (equivalently, s 2 max + s 2 min is fixed), the ability of a channel matrix to provide spatial multiplexing is maximized when the ratio of the singular values (also known as the condition number) is 1, i.e., κ(H) = s max /s min = 1 [9].…”

Section: System Model and Backgroundmentioning

confidence: 99%

HF MIMO NVIS Measurements with Co-located Dipoles for Future Tactical Communications

Daniels¹,

Peters²,

Heath³

2013

MILCOM 2013 - 2013 IEEE Military Communications Conference

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Multiple antennas in transceivers can increase system spectral efficiency, reduce transmit power, enable robustness to interference, and increase overall reliability through multipleinput multiple-output processing (MIMO). Consequently, high frequency (HF) networks, which feature extreme spectrum scarcity and unreliability, are prime for MIMO exploitation. Unfortunately, the desired antenna spacing for MIMO is proportional to the wavelength (tens of meters at HF). One promising approach is to utilize two antennas in a single antenna footprint through cross-polarization. This configuration has not yet been fully validated for MIMO at HF. In this paper, we demonstrate MIMO capabilities in near vertical incidence sky-wave (NVIS) propagation through a measurement campaign. This paper shows that MIMO is a game changer for HF NVIS with up to 2.27× data rate gains, up to 9× less transmit power, and > 3× fewer link failures. This paper also provides critical channel metrics for baseband designers of future MIMO HF protocols as demonstrated in our companion paper [1].

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Section: System Model and Backgroundmentioning

confidence: 99%

HF MIMO NVIS Measurements with Co-located Dipoles for Future Tactical Communications

Daniels¹,

Peters²,

Heath³

2013

MILCOM 2013 - 2013 IEEE Military Communications Conference

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“…Recently, a promising MIMO technique for SC-FDE was proposed in [19]. This technique employs a Singular Value Decomposition (SVD) scheme [20,21] that combines precoding [22] and decoding [23] at the frequency level, along with a powerful receiver based on the Iterative Block Decision Feedback Equalizer (IB-DFE) [24], that allows for excellent performance, even in severely time-dispersive channels. Techniques based on SVD, such as this one, can be an interesting option for 5G systems [25,26].…”

Section: Introductionmentioning

confidence: 99%

On the Physical Layer Security Characteristics for MIMO-SVD Techniques for SC-FDE Schemes

Madeira

Guerreiro

Dinis

et al. 2019

Sensors

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Multi-Input, Multi-Output (MIMO) techniques are seeing widespread usage in wireless communication systems due to their large capacity gains. On the other hand, security is a concern of any wireless system, which can make schemes that implement physical layer security key in assuring secure communications. In this paper, we study the physical layer security issues of MIMO with Singular Value Decomposition (SVD) schemes, employed along with Single-Carrier with Frequency-Domain Equalization (SC-FDE) techniques. More concretely. the security potential against an unintended eavesdropper is analysed, and it is shown that the higher the distance between the eavesdropper and the transmitter or receiver, the higher the secrecy rate. In addition, in a scenario where there is Line of Sight (LOS) between all users, it is shown that the secrecy rate can be even higher than in the previous scenario. Therefore, MIMO-SVD schemes combined with SC-FDE can be an efficient option for highly secure MIMO communications.

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“…The Signal-to-Noise Ratio (SNR) of ordered post processing describes the detected BER of bit-interleaved and coded MIMO-OFDM links. The post processing is established over the subcarriers [2]. So, Channel Estimation (CE) is required to avoid the channel fading in OFDM, while the coherent detection is present in the MIMO system [3].…”

Section: Introductionmentioning

confidence: 99%

Efficient Turbo Inter Leaver Based MIMO OFDM System For Low Complexity Outdoor Communication

Kumari*,

Prasad

2019

IJEAT

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An arrangement of multiple antennas in both the receiver and transmitter called Multiple Input and Multiple Output (MIMO). The Orthogonal Frequency Division Multiplexing (OFDM) is enabled in MIMO system for high data wireless communications. Combination of both MIMO and OFDM Access (OFDMA) is a growing technology in next generation communication systems. In this work, the Bit Error Rate (BER) performance of MIMO-OFDMA is analyzed with Orthogonal Space Time Block Code (OSTBC), Maximum Ratio Combining (MRC) and Turbo coding scheme over flat fading channel are named as MIMO-MRC-OFDMA. OSTBC is a transmit diversity scheme, which is utilized for delivering an efficient transmission with high peak data rates that significantly improves the capacity of communication systems. Successively, the MRC diversity solves transmit and receive diversity from an OSTBC. MRC approach is applied in the receiving end for summing and weighing the received signals from the multiple paths. Besides, turbo coding scheme is utilized for error correction in a given code rate. The proposed system performance is evaluated in light of BER by varying the number of receive and transmit antennas such as 2×2, 2×4, 4×2 and 4×4

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Modeling ordered subcarrier SNR in MIMO-OFDM wireless links

Cited by 31 publications

References 42 publications

HF MIMO NVIS Measurements with Co-located Dipoles for Future Tactical Communications

HF MIMO NVIS Measurements with Co-located Dipoles for Future Tactical Communications

On the Physical Layer Security Characteristics for MIMO-SVD Techniques for SC-FDE Schemes

Efficient Turbo Inter Leaver Based MIMO OFDM System For Low Complexity Outdoor Communication

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