An overview of next-generation mobile WiMAX technology

Ahmadi, Sassan

doi:10.1109/mcom.2009.5116805

Cited by 125 publications

(52 citation statements)

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“…This kind of investigation has been carried out at WiLab (Italy) by means of the simulation platform SHINE, that has been developed in the last years to assess the performance of wireless networks in realistic scenarios. The interested reader may refer to (Andrisano et al, 2007;2009;Bazzi et al, 2006).…”

Section: Discussionmentioning

confidence: 99%

Mobile WiMAX Performance Investigation

Bazzi¹,

Leonardi²,

Pasolini³

et al. 2010

Radio Communications

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Section: Discussionmentioning

confidence: 99%

Mobile WiMAX Performance Investigation

Bazzi¹,

Leonardi²,

Pasolini³

et al. 2010

Radio Communications

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“…One observes that no attenuation affects the signal and that no changes occurred to wave vector k in the calculation of the three-dimensional Fourier transform as a lossless and scatter-free environment is assumed. In this environment, 2 …”

Section: Wave Vector-frequency and Space-time Relationshipsmentioning

confidence: 98%

“…The fourth generation (4G) communications technologies are designed in order to response to these requirements. These communications technologies, including LTE-Advanced [1] and mobile WiMAX [2], are expected to provide the peak downlink and uplink transmission rates of 1 Gbps and 500 Mbps, respectively, and to maintain connections in high mobility scenarios, e.g., at 100 km/h on highways and at 350 km/h on bullet trains.…”

Section: Introductionmentioning

confidence: 99%

Spatio-temporal channel characterization: theoretical framework and applications in MIMO system design

et al. 2011

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The utilization of multiple antennas and space-time codes in multiple-input and multipleoutput (MIMO) communication systems significantly improves the transmission channel capacity without using additional bandwidth and power. The improvement is achieved by decomposing the spatial structure of transmission channels and performing appropriate temporal and spatial multiplexing. In this paper, we propose a novel theoretical framework for MIMO channel modeling and characterization in order to facilitate the MIMO system design and performance evaluation. The channels are represented in space, time, wave vector, and frequency domains while the space-time and wave vector-frequency interdependences are considered. A realization of the theoretical framework, in a form of a practical framework, is also proposed to address the channel modeling and characterization at both transmitter and receiver sides. The utilization of the practical framework in MIMO communication system design is discussed to illustrate its applications in realistic scenarios. The angle of arrival estimation based on the proposed practical framework using field test measurement data is also presented as illustrative examples.

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“…DVB-T (Digital Video Broadcasting-Terrestrial) [3] and ISDB-T (Integrated Service Digital Broadcasting-Terrestrial) [4] also use OFDM for providing high data throughput and flexible configurations for digital television broadcasting. A multiuser version of OFDM, called OFDMA (Orthogonal Frequency Division Multiple Access) has been selected for the Long Term Evolution (LTE) downlink [5] and WiMAX (Worldwide Interoperability for Microwave Access) [6]. IEEE 802.22,…”

Section: Introductionmentioning

confidence: 99%

PAPR Reduction and Performance Improvement in OFDM Systems using WHT-based Schemes

Aquino¹,

Mendes²

2017

JCIS

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Abstract-Orthogonal frequency division multiplexing (OFDM) is a robust and reliable multicarrier modulation scheme that has proven to be adequate for broadband communications. It is widely used in broadcasting and broadband wireless and wireline systems. However, in scenarios where the communication devices are power-limited, such as mobile and satellite communications, OFDM has not been massively used or even not used at all. For instance, OFDM is used only in downlink of 4G networks, while the uplink uses single carrier frequency division multiplexing. One of the main culprits of this is the high peak to average power ratio (PAPR) of the OFDM signal. Reducing the PAPR of the OFDM signals is important for a large variety of application. Several PAPR reduction techniques for OFDM have been proposed recently. The aim of this paper is to present a tutorial about a set of algorithms based on Walsh-Hadamard transform (WHT) for reducing the PAPR of the OFDM symbols. We also propose a new technique, named selective mapping based on WHT without extended information (SLM-WHT-WEI), which does not convey the explicit information to the receiver. We will show that the approaches based on WHT can also improve the OFDM symbol error rate performance over frequency-selective channels. Different schemes based on the properties of the WHT are presented and compared, assuming linear and non-linear channels. The PAPR reduction performance analysis shows that the PAPR can be effectively reduced while good performance in terms of symbol error rate can be achieved even in severely constrained channel conditions.

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An overview of next-generation mobile WiMAX technology

Cited by 125 publications

References 1 publication

Mobile WiMAX Performance Investigation

Mobile WiMAX Performance Investigation

Spatio-temporal channel characterization: theoretical framework and applications in MIMO system design

PAPR Reduction and Performance Improvement in OFDM Systems using WHT-based Schemes

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