Measurement and Analysis of the 60 GHz In-Vehicular Broadband Radio Channel

Peter, Michael; Keusgen, Wilhelm; Kortke, Andreas; Schirrmacher, M.

doi:10.1109/vetecf.2007.183

Cited by 37 publications

(30 citation statements)

References 10 publications

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“…A summary of delay spread values reported in major literatures with varying antenna configurations in indoor scenarios is available in [61]. [62]- [64] reports the delay spread under the presence and absence of human bodies in in-vehicle and aircraft cabins. [65] infers a proportionality of the delay spread with the size of the room.…”

Section: Large-scale Modelsmentioning

confidence: 99%

Channel Models and Beamforming at Millimeter-Wave Frequency Bands

Haneda

2015

IEICE Trans. Commun.

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SUMMARYMillimeter-wave (mm-wave) radio is attracting attention as one of the key enabling physical layer technologies for the fifthgeneration (5G) mobile access and backhaul. This paper aims at clarifying possible roles of mm-wave radio in the 5G development and performing a comprehensive literature survey on mm-wave radio channel modeling essential for the feasibility study. Emphasis in the literature survey is laid on grasping the typical behavior of mm-wave channels, identifying missing features in the presently available channel models for the design and evaluation of the mm-wave radio links within the 5G context, and exemplifying different channel modeling activities through analyses performed in the authors' group. As a key technological element of the mm-wave radios, reduced complexity beamforming is also addressed. Design criteria of the beamforming are developed based on the spatial multipath characteristics of measured indoor mm-wave channels.

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Section: Large-scale Modelsmentioning

confidence: 99%

Channel Models and Beamforming at Millimeter-Wave Frequency Bands

Haneda

2015

IEICE Trans. Commun.

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“…In practice, when Ω → 0 and Ω → ± , the CLFE in (20) will suffer from high sensitivity to noise [5]. Moreover, the condition number of f Ω will become very large, resulting in large estimation error forż ⟨ ⟩ D;I .…”

Section: Soft Switching Methods For Critical Cfo Valuesmentioning

confidence: 99%

“…All imbalance parameters are assumed to be time invariant. Furthermore, the measured 60 GHz MIMO channels in [20] were used. The following OFDM parameter sets are investigated: = 256, 0 = 17, and = 512, 0 = 91.…”

Section: Simulation Setupsmentioning

confidence: 99%

Efficient Joint Estimation and Compensation of CFO, Tx/Rx Frequency-Selective I/Q Imbalance, and the MIMO Radio Channel in OFDM Systems

Luo

Keusgen

Kortke

2013

Journal of Electrical and Computer Engineering

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MIMO OFDM is a very promising technique for future wireless communication systems. By applying direct conversion architecture, low-cost, low-power, small size, and flexible implementation of MIMO OFDM systems can be realized. However, the performance of direct conversion architecture-based MIMO OFDM systems can be seriously affected by RF impairments incling carrier frequency offset (CFO) and I/Q-imbalance. While OFDM is sensitive to CFO, direct conversion architecture is sensitive to I/Q imbalance. Such RF impairments aggravate as the carrier frequency becomes higher for example, beyond 60 GHz. To achieve the desired high performance of MIMO OFDM, such RF impairments have to be compensated for. In this paper, the joint compensation of CFO, transmitter and receiver frequency-selective I/Q imbalance, and the MIMO radio channel is investigated. Two preamblebased schemes are proposed for impairment parameter estimation. The proposed preambles are constructed both in time and frequency domains and require much less overhead than the state-of-the-art designs. Furthermore, much lower computational complexity is allowed, enabling efficient implementation. The advantages and effectiveness of both proposed schemes are compared and verified by numerical simulations and complexity analysis.

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“…Measurements in [4,5,6] show that in the 60 GHz band signal propagates via both a direct path and by means of reflections from objects. The work in [4] provides measurement results and analyzes the 60 GHz space-time channel in LOS (line-of-sight) room and hallway environments.…”

Section: B Propagation Mechanismsmentioning

confidence: 99%

Directional neighbor discovery in 60 GHz indoor wireless networks

Ning

Kim

Krishnamurthy

et al. 2011

Performance Evaluation

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The unlicensed 60 GHz band brings the promise of multi-gigabit data rates to support new applications such as high definition video over wireless links. Signal propagation in the 60 GHz band significantly differs from that in the traditionally used 2.4 and 5 GHz bands. The propagation and penetration losses in the 60 GHz band are much higher. Furthermore, the signals are often reflected in indoor settings. Previous physical layer studies show that the use of directional antennas can significantly help in coping with these effects. In this paper, we address the problem of neighbor discovery in the 60 GHz band. We account for not only discovery via direct line-of-sight paths, but also via reflected beams. To the best of our knowledge, none of the previous efforts on higher layer protocols for use with directional antennas account for reflections. We consider two approaches for neighbor discovery (a) direct discovery where each node explicitly discovers its neighbors and, (b) gossipbased discovery where nodes exchange information with regards to their already discovered neighbors. We develop analytical models to capture the performance of the two approaches and validate the models via simulations in indoor settings with obstacles that reflect the transmitted signals. As one might expect, the gossip based discovery incurs a lower neighbor-discovery latency than direct discovery. We examine the impact of system parameters such as varying beamwidth and node density. Our study provides insights on the right choice of system parameters for efficient neighbor discovery in the 60 GHz regime.

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Measurement and Analysis of the 60 GHz In-Vehicular Broadband Radio Channel

Cited by 37 publications

References 10 publications

Channel Models and Beamforming at Millimeter-Wave Frequency Bands

Channel Models and Beamforming at Millimeter-Wave Frequency Bands

Efficient Joint Estimation and Compensation of CFO, Tx/Rx Frequency-Selective I/Q Imbalance, and the MIMO Radio Channel in OFDM Systems

Directional neighbor discovery in 60 GHz indoor wireless networks

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