On the Performance of Massive MIMO Systems With Low-Resolution ADCs and MRC Receivers Over Rician Fading Channels

Liu, Tianle; Tong, Jun; Guo, Qinghua; Xi, Jiangtao; Yu, Yanguang; Xiao, Zhitao

doi:10.1109/jsyst.2020.3014647

Cited by 16 publications

(11 citation statements)

References 35 publications

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“…The second term of the RHS in (10) denotes the pilot contamination produced by the users in P j,k except user k in cell j.…”

Section: Uplink Channel Estimationmentioning

confidence: 99%

Spectral and Energy Efficiency of Multicell Massive MIMO With Variable-Resolution ADCs Over Correlated Rayleigh Fading Channels

Xiong¹,

Sun²,

Wei³

et al. 2021

Preprint

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This paper analyzes the performance of multicell massive multiple-input and multiple-output (MIMO) systems with variable-resolution analog-to-digital converters (ADCs). In such an architecture, each ADC uses arbitrary quantization resolution to save power and hardware cost. Along this direction, we first introduce a quantization-aware channel estimator based on additive quantization noise model (AQNM) and linear minimum mean-squared error (LMMSE) estimate theory. Afterwards, by leveraging on the estimated channel state information (CSI), we derive the asymptotic expressions of achievable uplink spectral efficiency (SE) over spatially correlated Rayleigh fading channels for maximal ratio combining (MRC), quantization-aware multicell minimum mean-squared error (QA-M-MMSE) combining, and quantization-aware single-cell MMSE (QA-S-MMSE) combining, respectively. During the derivations, we consider the effect of quantization errors and resort to random matrix theory to achieve the asymptotic results. Finally, simulation results demonstrate that our theoretical analyses are correct and that the proposed quantization-aware estimator and combiners are more beneficial than the quantization-unaware counterparts. Besides, based on a generic power consumption model, it is shown that low-resolution ADCs can obtain the best tradeoff between SE and energy efficiency (EE) under multicell scenarios.

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“…The second term of the RHS in (10) denotes the pilot contamination produced by the users in P j,k except user k in cell j.…”

Section: Uplink Channel Estimationmentioning

confidence: 99%

Spectral and Energy Efficiency of Multicell Massive MIMO With Variable-Resolution ADCs Over Correlated Rayleigh Fading Channels

Xiong¹,

Sun²,

Wei³

et al. 2021

Preprint

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show abstract

“…It was also observed that when the number of antennas in the BS is increased, the undesirable effects of imperfect channel estimation are reduced. Further, in [ 15 ], the uplink of MIMO systems using MRC detectors in Rician fading channels is studied. Specifically, it was determined that as the Rician K factor increases, the adverse effects produced by imperfect channel estimation at the receiver are reduced.…”

Section: Introductionmentioning

confidence: 99%

A Scheduling Scheme for Improving the Performance and Security of MU-MIMO Systems

Mora

Garzón

Cacuango

et al. 2022

Sensors

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For the receiver of multiple-input multiple-output (MIMO) systems, linear detectors are an interesting option due to their good performance and low complexity. Nevertheless, MIMO systems lose diversity in exchange for eliminating interference when linear detectors are used. Aiming to maintain the system diversity while mitigating interference between users, this work proposes a scheduling scheme for the uplink of multiuser MIMO (MU-MIMO) systems that employ A antennas and the zero-forcing (ZF) detector at the receiver in the base station (BS). The channel model includes Rician fading and additive white Gaussian noise (AWGN) in an imperfect channel estimation scenario. The proposed scheme selects U users from a group of Ut users to transmit simultaneously, so that the signal-to-noise ratio (SNR) is maximized. For this, an exact expression to evaluate the SNR of the users is obtained. With this result, the scheduling strategy is proposed. Results show that as Ut increases, the outage probability (OP), and the bit error rate (BER) decrease as the system diversity increases, even when the system is completely loaded, i.e., when U=A. Moreover, it is shown that the scheduling scheme counteracts the imperfect channel estimation effects as Ut increases. Finally, the proposed scheme is tested in presence of an external eavesdropper trying to decode the information sent by the users. The results show that the presented proposal allows for a reduction of the secrecy-outage-probability (SOP) as Ut increases.

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“…Bu teknikler arasında en optimum olan yöntem MRC tekniğidir [1,2]. En optimum yöntem olan MRC tekniğine dayalı alıcıların performansı çeşitli çalışmalarda analiz edilmiştir ve bazıları [3][4][5][6][7][8]'de verilmiştir. Jamal ve Hamid [3], masif çok girişli çok çıkışlı (multiple-input multiple-output, MIMO) sistemlerde MRC tekniğine dayalı alıcıların performansını işaret-gürültü+girişim oranı (signal-tointerference-plus-noise ratio, SINR) için olasılık yoğunluk fonksiyonu (probability density function, PDF) türeterek analiz etmiştir.…”

Section: Introductionunclassified

“…Liu vd. [8], veri sezimi ve kanal kestirimi için düşük çözünürlüklü analogdijital çeviricilerin kullanıldığı masif MIMO sistemlerin alıcı kısmında MRC yöntemini tercih ederek Rician sönümlü kanallarda performans analizi yapmışlardır. Yukarıda bir kısmı [3][4][5][6][7][8]'de verilen çalışmalarda MRC alıcıların performansı çeşitli sönümlü kanallarda analiz edilmiştir.…”

Section: Introductionunclassified

“…[8], veri sezimi ve kanal kestirimi için düşük çözünürlüklü analogdijital çeviricilerin kullanıldığı masif MIMO sistemlerin alıcı kısmında MRC yöntemini tercih ederek Rician sönümlü kanallarda performans analizi yapmışlardır. Yukarıda bir kısmı [3][4][5][6][7][8]'de verilen çalışmalarda MRC alıcıların performansı çeşitli sönümlü kanallarda analiz edilmiştir. Yakın zamanda bu sönümlü kanal modellerinden farklı olarak, çokyollu yayılım ve gölgeleme etkilerini birleşik olarak iyi bir şekilde tanımlayan, matematiksel olarak analiz kolaylığı sağlayabilen Fisher-Snedecor F isimli bir sönümlenmeli kanal modeli [9]'da önerilmiştir.…”

Section: Introductionunclassified

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Dik açılı dördün genlik modülasyonu ve L-kollu MRC tekniğine dayalı bir kablosuz haberleşme sisteminin Fisher-Snedecor F sönümlü kanallardaki performansı

Kapucu¹

2021

Ömer Halisdemir Üniversitesi Mühendislik Bilimleri Dergisi

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Bu çalışmada, iletim yöntemi olarak dik açılı dördün genlik modülasyonunu kullanan L kollu en yüksek oranlı birleştirme alıcısına sahip bir kablosuz haberleşme sisteminin Fisher-Snedecor F sönümlenme koşulları altındaki ortalama sembol hata oranı analiz edilmiştir. Analiz, L kollu en yüksek oranlı birleştirme tekniğine dayalı alıcıdaki toplam anlık işaret-gürültü oranının olasılık yoğunluk fonksiyonuna dayanarak yapılmıştır. Ele alınan sistemin ortalama sembol hata oranı için Gauss Q fonksiyonunun yaklaşık bir ifadesi kullanılarak kapalı formda yaklaşık bir çözüm sunulmuştur. Daha sonra ise sistemin asimptotik ortalama sembol hata oranı türetilmiştir. Sönümlenme parametresi (m), gölgeleme parametresi (ms), kol sayısı (L) ve modülasyon seviyesi değiştirilerek ortalama sembol hata oranı farklı konfigürasyonlar için gösterilmiştir. Buna ek olarak, türetilen yaklaşık ifadenin analitik sonuçları ile ortalama sembol hata oranı integralinin nümerik hesaplanması ile elde edilen sonuçların yakın uyum içinde olduğu da gösterilmiştir. Asimptotik sonuçların ise yüksek işaretgürültü oranı bölgesinde diğer sonuçlar ile çok iyi uyum gösterdiği gözlenmiştir.In this study, average symbol error rate (ASER) of a wireless communication system which employs L-branch maximum ratio combining (MRC) at receiver and uses rectangular quadrature amplitude modulation (RQAM) as a transmission scheme is analyzed under Fisher-Snedecor F fading conditions. The analysis is conducted based on probability density function of total instantaneous signalto-noise ratio (SNR) at L-branch MRC receiver. A closedform approximate solution is presented for the ASER of the considered system by utilizing an approximate expression of Gaussian Q function. Then, asymptotic ASER of the system is derived. The ASER is illustrated for different configurations by varying fading parameter (m), shadowing parameter (ms), number of branches (L) and modulation level. In addition, it is also shown that analytical results of the derived approximate expression are close to the ones obtained by the numerical computation of the ASER integral. It is observed that the asymptotic results are in well agreement with other results at high SNR region.

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On the Performance of Massive MIMO Systems With Low-Resolution ADCs and MRC Receivers Over Rician Fading Channels

Cited by 16 publications

References 35 publications

Spectral and Energy Efficiency of Multicell Massive MIMO With Variable-Resolution ADCs Over Correlated Rayleigh Fading Channels

Spectral and Energy Efficiency of Multicell Massive MIMO With Variable-Resolution ADCs Over Correlated Rayleigh Fading Channels

A Scheduling Scheme for Improving the Performance and Security of MU-MIMO Systems

Dik açılı dördün genlik modülasyonu ve L-kollu MRC tekniğine dayalı bir kablosuz haberleşme sisteminin Fisher-Snedecor F sönümlü kanallardaki performansı

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