Wideband and Ultra-Wideband Characterization of Three-Dimensional MIMO Wireless Channels

Pistea, Ana-Maria; Rad, Hamidreza Saligheh

doi:10.1109/lcomm.2011.112311.111948

Cited by 2 publications

(1 citation statement)

References 7 publications

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“…Therefore, controlling the spectrum shape by means of TH codes is significant. The related analyses can be found in the literature [5][6][7]. On the other hand, the construction and theoretical bounds of TH codes are investigated.…”

Section: Introductionmentioning

confidence: 99%

Correlation Property and Low Bound of Time-Hopping Codes for UWB Communications

Liu¹,

Xuan²,

Zhang³

2015

AMM

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In this paper, we analyze correlation property of time-hopping (TH) codes for time-hopping spread spectrum ultra wideband (THSS-UWB) communication systems. Several different definitions of TH periodic correlation function are compared and discussed. Based on the comparison, the relation between TH codes and frequency-hopping (FH) codes is obtained. Also, the averages of TH periodic correlation function values are investigated, and the relations between averages and four parameters of TH codes are introduced. Based on the result, low bound of maximal TH correlation function values is further given, where the expression of low bound of TH codes relates codes period, the number of time slots, TH codes family size and maximal TH correlation function values.

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Section: Introductionmentioning

confidence: 99%

Correlation Property and Low Bound of Time-Hopping Codes for UWB Communications

Liu¹,

Xuan²,

Zhang³

2015

AMM

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On the Cross Correlation Properties of MIMO Wideband Channels under Nonisotropic Propagation Conditions

Pistea

Rad

2015

International Journal of Antennas and Propagation

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Wideband (WB) and ultrawideband (UWB) systems combined with multiple-input multiple-output (MIMO) technology increase both the systems performances and the complexity of the channel models required to evaluate their capabilities. Because in real scenarios waves propagate nonisotropically, the accuracy of the channel model is increased if nonisotropic propagation is considered. The channel bandwidth is the key term in the evaluation process of these systems because large bandwidths introduce frequency selectivity, a unique phenomenon of WB and UWB systems with more complexity in the latter case. This is due to the fact that, unlike WB technology in which the propagating signal is the only affected parameter by the frequency selectivity, in the UWB case, this phenomenon also affects the antenna propagation pattern (APP). In this paper, we developed a novel channel model based on the statistical analysis of two-dimensional cross correlation functions (CCFs) of WB/UWB MIMO nonisotropic channels. A mathematical solution to assess the frequency selective behavior of the UWB APP is also presented. The CCF reveals how the power spectral density (PSD) of the channel is influenced by bandwidth, nonisotropic propagation, and APP.

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Wideband and Ultra-Wideband Characterization of Three-Dimensional MIMO Wireless Channels

Cited by 2 publications

References 7 publications

Correlation Property and Low Bound of Time-Hopping Codes for UWB Communications

Correlation Property and Low Bound of Time-Hopping Codes for UWB Communications

On the Cross Correlation Properties of MIMO Wideband Channels under Nonisotropic Propagation Conditions

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