On OFDM and SC-FDE Transmissions in Millimeter Wave Channels with Beamforming

Wu, Meng; Wübben, Dirk; Dekorsy, Armin; Baracca, Paolo; Braun, Volker; Halbauer, Hardy

doi:10.1109/vtcspring.2016.7504372

Cited by 16 publications

(13 citation statements)

References 11 publications

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“…Actually, the DS within each cluster is very small, e.g., in the 3GPP model [34], the DS within cluster in urban micro scenario is about 5 ns for the LOS and 11 ns for non-LOS. Moreover, the work [35] has verified that the DS will be even smaller after beam searching. Therefore, it is reasonable to neglect the DS within each cluster by assuming τ l1,l2 = τ l1 for 1 ≤ l 2 ≤ N ray .…”

Section: B Extension To Multi-cluster Modelmentioning

confidence: 92%

Harmonic Retrieval Based Baseband Channel Estimation for Millimeter Wave OFDM Systems

Sha

Hanzo

Chen

2019

IEEE Trans. Veh. Technol.

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For massive multi-input multi-output (MIMO) enhanced millimeter wave (mmWave) frequency-division multiplexing (OFDM) systems, channel estimation (CE) is challenging. In this paper, the baseband CE of mmWave based MIMO-OFDM systems after beam searching is formulated as a harmonic retrieval (HR) problem, where each path of the channel represents a harmonic with its frequency and strength to be estimated. We propose two methods, a windowed orthogonal matching pursuit (window-OMP) method and a windowed discrete Fourier transform (window-DFT) method, to approximately acquire the maximum likelihood (ML) estimate of the baseband CE. The window-OMP method is capable of approximating the ML estimator with high accuracy, while the window-DFT method has lower complexity and is shown to acquire approximate ML estimate under the assumption that the frequencies of harmonics are sufficiently separated. Theoretical analysis is performed to derive a closed-form Cramér-Rao lower bound (CRLB) as well as to investigate the effect of wrong paths to the estimation accuracy. A simulation study is conducted to investigate the performance of the proposed methods, and the results obtained verify that our methods outperform the existing estimation of signal parameters by rotational invariant techniques (ESPRIT) based HR method and the conventional interpolation method.

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Section: B Extension To Multi-cluster Modelmentioning

confidence: 92%

Harmonic Retrieval Based Baseband Channel Estimation for Millimeter Wave OFDM Systems

Sha

Hanzo

Chen

2019

IEEE Trans. Veh. Technol.

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“…SC-FDE was also used for compensating the pass-loss in millimeter wave by integrating with OFDM. This work was carried by Wu et al [20] to offer lower PAPR. Similar work direction was carried out by Cheng et al [21] towards investigating imbalance between inphase and quadrature.…”

Section: ) Single Carrier Frequency Domain Equalization (Sc-fde)mentioning

confidence: 99%

Studying Applicability Feasibility of OFDM in Upcoming 5G Network

K.P¹,

N²

2017

ijacsa

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Abstract-Orthogonalfrequency-division multiplexing (OFDM) is one of unbeatable multiplexing technique till date. However with increasing version of next generation mobile standards like 5G, the applicability of OFDM is quite questionable. The prime reason behind this is in order to offer higher data rates and extensive networking services in 5G, OFDM will be required to overcome some inherent problems of spectral leakage, power consumption, less supportability of increased channel capacity. The reason community still believes that there is positive scope of OFDM to be applicable in 5G network provided it undergoes certain changes. This paper reviews some of the complimentary waveforms that have been theoretically proven to be adding edge to OFDM system. The paper reviews different waveforms as well as multiple access techniques to be used in designing 5G technology and assess their effectiveness in viewpoint of research applicability and effectiveness towards leveraging 5G.

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“…The significant feature of the AASA is that it tracks each service user within a given frame of the cell by using an alternative adaptive beam pattern. However, the SBSA system tracks every user by collecting the beam patterns based on user location [10][11][12]. Compared to the SBSA, the AASA can offer better performance as it is least complicated and is need to be relay on the proper channel estimation (SE) and convergence speed of the beamforming algorithm [5,6].…”

Section: Introductionmentioning

confidence: 99%

“…The problem statement of the manuscript is given below. The consideration of the smart antenna with OFDM can improve the throughput and by which the reuse of the same subcarriers can be possible over the various beams for spatially separated users [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15]. In order to enhance the user signal-to-interference-plus-noise ratio (SINR) as it uses higher modulation schemes.…”

Section: Introductionmentioning

confidence: 99%

“…Hence, to have the support towards the AASA in the OFDM system, the adaptive resource allocation can lead to complicated optimization. Hence, the system becomes unstable, which means the adaptive algorithm cannot achieve convergence [11,12]. Thus, a suboptimal and realistic smart antenna mechanism is needed to implement in the OFDM with adaptive resource allocation.…”

Section: Introductionmentioning

confidence: 99%

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CL-SA-OFDM: Cross-layer and smart antenna based ofdm system performance enhancement

Shivapanchakshari

Aravinda²

2020

IJECE

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The growing usage of wireless services is lacking in providing high-speed data communication in recent times. Hence, many of the modulation techniques are evolved to attain these communication needs. The recent researches have widely considered OFDM technology as the prominent modulation mechanism to fulfill the futuristic needs of wireless communication. The OFDM can bring effective usage of resources, bandwidth, and system performance enhancement in collaboration with the smart antenna and resource allocation mechanism (adaptive). However, the usage of adaptive beamforming with the OFDM leads to complication in the design of medium access layer and which causes a problem in adaptive resource allocation mechanism (ARAM). Hence, the proposed manuscript intends to design an OFDM system by considering different switched beam smart antenna (SBSA) along with the cross-layer adaptive resource allocation (CLARA) and hybrid adaptive array (HAA). In this, various smart antenna mechanism are considered to analyze the quality of service (QoS) and complexity reduction in the OFDM system. In this paper, various SA schemes are used as per the quality of service (QoS) requirement of the different users. The performance analysis is conducted by considering data traffic reduction, bit-rate reduction, and average delay.

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On OFDM and SC-FDE Transmissions in Millimeter Wave Channels with Beamforming

Cited by 16 publications

References 11 publications

Harmonic Retrieval Based Baseband Channel Estimation for Millimeter Wave OFDM Systems

Harmonic Retrieval Based Baseband Channel Estimation for Millimeter Wave OFDM Systems

Studying Applicability Feasibility of OFDM in Upcoming 5G Network

CL-SA-OFDM: Cross-layer and smart antenna based ofdm system performance enhancement

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