Characteristic Mode Analysis of ESPAR for Single-RF MIMO Systems

Han, Zixiang; Zhang, Yujie; Shen, Shanpu; Li, Yue; Chiu, Chi-Yuk; Murch, R.D.

doi:10.1109/twc.2020.3041449

Cited by 22 publications

(15 citation statements)

References 50 publications

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“…In addition, the ǫ value points where the WF and EP lines separate indicate the number of available basis N eff (i.e. EADoF) provided by the ǫ value structure as calculated in (32) and approximately match with the results in Fig. 7.…”

Section: B Mimo Antenna Capacity Boundsupporting

confidence: 74%

“…In Fig. 7, we plot the minimum ǫ for the first N eff basis as calculated in (32). It can be noticed that ǫ is an increasing function of N eff as expected.…”

Section: B Mimo Antenna Capacity Boundmentioning

confidence: 55%

“…Correspondingly the radiation patterns arising from each of the port currents are written as E T = [e T,1 , e T,2 , ..., e T,N ] ∈ C K×N where e T,n ∈ C K×1 is the radiation pattern of the nth port excited by a unit current with all the other ports open-circuited, over K uniformly sampled three-dimensional (3D) spatial angles. We use these patterns and the results in [31] to decompose the radiation patterns into a natural set of orthonormal modal functions similarly to the Theory of Characteristic Modes (TCM) [24], [32]. These orthonormal modal functions can then be used for analysis of the channel capacity and interpreted as being related to the ADoF of the structure.…”

Section: System Modelmentioning

confidence: 99%

“…N eff , and the consequent capacity bound can be larger. The maximum N eff can be obtained by solving (32) for a fixed ǫ. That is EADoF N eff is dependent on ǫ (the maximum allowable current norm given P rad ), indicating the number of basis that can be used with the constraint of current norm and radiation power.…”

Section: Capacity With Dual Constraintmentioning

confidence: 99%

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Using Loaded N-port Structures to Achieve the Continuous-Space Electromagnetic Channel Capacity Bound

Han¹,

Shen²,

Zhang³

et al. 2022

Preprint

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A method for achieving the continuous-space electromagnetic channel capacity bound using loaded N -port structures is described. It is relevant for the design of compact multiple-input multiple-output (MIMO) antennas that can achieve channel capacity bounds when constrained by size. The method is not restricted to a specific antenna configuration and a closed-form expression for the channel capacity limits are provided with various constraints. Furthermore, using loaded N -port structures to represent arbitrary antenna geometries, an efficient optimization approach is proposed for finding the optimum MIMO antenna design that achieves the channel capacity bounds. Simulation results of the channel capacity bounds achieved using our MIMO antenna design with one square wavelength size are provided. These show that at least 18 ports can be supported in one square wavelength and achieve the continuous-space electromagnetic channel capacity bound. The results demonstrate that our method can link continuous-space electromagnetic channel capacity bounds to MIMO antenna design.

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Section: B Mimo Antenna Capacity Boundsupporting

confidence: 74%

“…In Fig. 7, we plot the minimum ǫ for the first N eff basis as calculated in (32). It can be noticed that ǫ is an increasing function of N eff as expected.…”

Section: B Mimo Antenna Capacity Boundmentioning

confidence: 55%

Section: System Modelmentioning

confidence: 99%

Section: Capacity With Dual Constraintmentioning

confidence: 99%

See 2 more Smart Citations

Using Loaded N-port Structures to Achieve the Continuous-Space Electromagnetic Channel Capacity Bound

Han¹,

Shen²,

Zhang³

et al. 2022

Preprint

Self Cite

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“…The concept of spatial modulation (SM) [ 1 ], characterized by the principle of single radio frequency (RF) multiple-input multiple-output (MIMO) design [ 2 , 3 , 4 ], has attracted considerable attention in research as summarized in [ 5 , 6 ] in order to simplify the implementation of MIMO systems. This is performed by utilizing the index of the activated transmit antenna for information modulation along with traditional digital modulation.…”

Section: Introductionmentioning

confidence: 99%

Sparse Space Shift Keying Modulation with Enhanced Constellation Mapping

Wang

Huang

Liu

et al. 2022

Sensors

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For reducing the switching frequency between the radio frequency (RF) chain and transmit antennas, a class of new sparse space shift keying modulation (SSSK) schemes are presented. This new class is proposed to simplify hardware implementation, through carefully designing the spatial constellation mapping pattern. Specifically, different from traditional space shift keying modulation (SSK), the proposed SSSK scheme utilizes more time slots to construct a joint design of time and spatial domain SSK modulation, while maintaining the special structure of single RF chain. Since part of the multi-dimension constellations of SSSK concentrate the energy in less time slots, the RF-switching frequency is effectively reduced due to the sparsity introduced in the time domain. Furthermore, through theoretical analysis, we obtain the closed-form expression of the bit error probability for the SSSK scheme, and demonstrate that slight performance gain can be achieved compared to traditional SSK with reduced implementation cost. Moreover, we integrate transmit antenna selection (TAS) to achieve considerable performance gain. Finally, simulation results confirm the effectiveness of the proposed SSSK scheme compared to its traditional counterpart.

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Parasitic Antennas for Current and Future Wireless Communication Systems: Trends, Challenges, and Emerging Aspects

et al. 2022

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Characteristic Mode Analysis of ESPAR for Single-RF MIMO Systems

Abstract: If it is the author's pre-published version, changes introduced as a result of publishing processes such as copy-editing and formatting may not be reflected in this document. For a definitive version of this work, please refer to the published version.

Cited by 22 publications

References 50 publications

Using Loaded N-port Structures to Achieve the Continuous-Space Electromagnetic Channel Capacity Bound

Using Loaded N-port Structures to Achieve the Continuous-Space Electromagnetic Channel Capacity Bound

Sparse Space Shift Keying Modulation with Enhanced Constellation Mapping

Parasitic Antennas for Current and Future Wireless Communication Systems: Trends, Challenges, and Emerging Aspects

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