Capacity Performance of Adaptive Receive Antenna Subarray Formation for MIMO Systems

Theofilakos, P.; Kanatas, Αthanasios G.

doi:10.1155/2007/56471

Cited by 15 publications

(8 citation statements)

References 25 publications

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“…5. Fortunately, the proposed signal model in (3) implies that the particular radiation characteristics can be ignored, as the major challenge is to find the loads that give the desired currents at the ports of the ESPARs elements. In light of this approach, the ESPARs structural characteristics can be adjusted in order to ease the loading computation.…”

Section: B Multiplexing Of 16-qam Signals Over the Airmentioning

confidence: 99%

“…On the other hand, this paper shows that ESPAR arrays can emulate MIMO transmission in a similar way as conventional MIMO systems do, but with much less size and hardware burden. Therefore, it would be of great practical interest to consider the system model in (3) in massive MIMO regime.…”

Section: Parasitic Arraysmentioning

confidence: 99%

“…Besides other approaches that deal with this problem at the baseband (e.g. [2], [3]), a plenty of advanced antenna design methods have been proposed in the analog/RF domain whose main objective is to design compact arrays with suppressed mutual coupling between adjacent antenna elements [4]- [6]. Another approach that has been introduced recently in this area builds on electronically steerable parasitic antenna radiators (ESPARs) that require just a single RF source [7]- [10].…”

Section: Introductionmentioning

confidence: 99%

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A new signal model for MIMO communication with compact parasitic arrays

Barousis

Papadias

Müller³

2014

2014 6th International Symposium on Communications, Control and Signal Processing (ISCCSP)

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Significant research effort has been drawn over the last few years to reduce the hardware complexity and size of Multiple Input -Multiple Output (MIMO) systems and to push this promising technology even to lightweight and small portable devices. Among other architectures, single-fed MIMO systems with compact parasitic arrays are a possible candidate toward this goal. To facilitate the study and design of parasitic arrays for MIMO applications, this paper presents an alternative signal model considering the currents at the ports of the transmitting array as the input to the system. Based on this model, a novel parasitic array is designed that is able to multiplex 16-QAM signals with the aid of a single radio-frequency (RF) source. The proposed signal model can also be useful for the evaluation of large parasitic arrays in massive MIMO regime, with significantly reduce hardware burden.

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Section: B Multiplexing Of 16-qam Signals Over the Airmentioning

confidence: 99%

Section: Parasitic Arraysmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A new signal model for MIMO communication with compact parasitic arrays

Barousis

Papadias

Müller³

2014

2014 6th International Symposium on Communications, Control and Signal Processing (ISCCSP)

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show abstract

“…To realize a single RF front-end path, orthogonal transmission of multiple RF streams over a single front-end must be recognized. Many proposals utilize typical antenna arrays combined with techniques for adaptive selection of subset of the available antennas, thus reducing the number of required RF chains [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Design and evaluation of single RF OFDMMIMO based on time division multiplexing

Kim

Yoon

et al. 2014

2014 14th International Symposium on Communications and Information Technologies (ISCIT)

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It is known that the main limitation of implementing the multiple input multiple output (MIMO) system is the complexity and high cost of the hardware in the RF section. In this paper, an approach of using time division multiplexing (TDM) with a MIMO receiver to reduce the power consumption and cost of the multiple antenna RF chains is proposed and evaluated. By using the TDM technique, our proposed orthogonal frequency division multiplexing OFDM-MIMO receiver reduces the number of RF chains from N to 1, which significantly reduces the overall cost and size of the MIMO receiver. Finally simulation results show that the simple MIMO receiver almost can provide the same diversity gain as the diversity gain of the multiple RF chain MIMO systems.

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“…The increased hardware cost is mainly due to having multiple Radio Frequency (RF) chains (one for each antenna element). To lower the number of RF chains and provide a low cost MIMO system with good performance, a number of antenna selection techniques have been proposed in the literature [3][4][5][6][7][8][9][10][11], in which a subset of the available transmit and/or receive antennas are selected, so-called Hard Antenna Selection (HAS), to increase the capacity. Indeed, the antenna selection tech-* Correspondence to: J. Ahmadi-Shokouh, School of Electrical and Computer Engineering, University of Sistan and Baluchestan, Zahedan, Iran.…”

Section: Introductionmentioning

confidence: 99%

Pre‐LNA smart soft antenna selection for MIMO spatial multiplexing/diversity system when amplifier/sky noise dominates

Ahmadi‐Shokouh

Jamali

Safavi‐Naeini

2010

Trans Emerging Tel Tech

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SUMMARYDue to a beamforming capability, Soft Antenna Selection (SAS) techniques have shown great performance improvements over the traditional antenna sub-set selection schemes for Multi-Input and Multi-Output (MIMO) communication systems. A SAS method is basically defined by a pre-processing matrix which is located in RF domain, either before or after the Low Noise Amplifier (LNA). In this paper, we propose a pre-LNA SAS module which is adaptively tuned to maximise the mutual information or the Signal to Noise Ratio (SNR) gain for spatial multiplexing or diversity transmissions, respectively. The SAS optimality is discussed for the two practical cases where either the sky noise or the amplifier noise dominates. We analytically show that the pre-LNA SAS method even outperforms the full-complexity MIMO system for when the number of receive Radio Frequency (RF) chains is greater than or equal to the number of the transmit RF chains. The simulation results verify this claim and also superiority of the proposed scheme to the post-LNA SAS.

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Capacity Performance of Adaptive Receive Antenna Subarray Formation for MIMO Systems

Cited by 15 publications

References 25 publications

A new signal model for MIMO communication with compact parasitic arrays

A new signal model for MIMO communication with compact parasitic arrays

Design and evaluation of single RF OFDMMIMO based on time division multiplexing

Pre‐LNA smart soft antenna selection for MIMO spatial multiplexing/diversity system when amplifier/sky noise dominates

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