Monobit digital receivers: design, performance, and application to impulse radio

Yin, Huarui; Wang, Zhengdao; Ke, Lei; Wang, Jun

doi:10.1109/tcomm.2010.06.080446

Cited by 61 publications

(63 citation statements)

References 18 publications

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“…It is shown that utilizing one bit ADCs causes significant degradation in data rates in the high SNR regime [33]. Also, channel estimation with the use of pilot sequences is problematic if only one bit ADCs are utilized at the BSs [34]. To recover the performance loss due to the use of one bit ADCs for all antennas, a few antennas are coupled with high-precision ADCs, and most of the antennas are used with one-bit ADCs where the resulting scheme is called as "Mix-ADC" [35].…”

Section: Massive Mimo Systemsmentioning

confidence: 99%

Multi-Envelope Precoding for Massive MIMO Systems

Gümüş

Duman

2018

IEEE Wireless Commun. Lett.

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Wireless communications is an important part of information and communication technologies. Particularly, with the introduction of 5G wireless systems, higher data rates, ultra-low latencies and improved power efficiencies are demanded. It is understood that multiple-input multiple-output (MIMO) systems constitute some of the promising technologies to meet these demands, however, currently used number of antennas at the base stations (BS) is not sufficient to reveal the full potential. As a result, massive MIMO systems which use a very large number of antennas at the BSs have recently been proposed as enabling solutions. While massive MIMO promises much for 5G and beyond wireless technologies, there are many problems to be solved including lowering of high built-in and operating costs of BSs to make this technology practical.Constant envelope (CE) precoding has recently been proposed as a way to reduce the hardware complexity of massive MIMO systems. CE precoding technique for downlink enables a BS structure with one (nonlinear) power amplifier (PA) coupled with continuous or discrete phase shifters in front of each antenna instead of separate highly linear PAs driving each. While CE precoding offers significant reductions in hardware costs, it results in some performance loss in terms of achievable data rates and power efficiencies compared to conventional zero forcing precoding based approaches.iii iv In this thesis, we build on the CE precoding idea and propose the use of a multienvelope precoding technique for massive MIMO systems which utilizes more than one (but only a few, e.g., 2 or 3) PAs with the objective of recovering some of the performance loss due to the use of CE precoding. The proposed multi-envelope precoding method relies on the standard zero forcing algorithm to group the antennas, and then it utilizes an envelope with a higher level on the antenna group(s) requiring higher power. In other words, the number of power levels used equals to the number of antenna groups. We explore the use of both continuous and discrete phase shifters, and via extensive simulations, we demonstrate that the newly proposed approaches provide significant performance improvements over the CE solutions closing some of the performance gap with average power constraint precoding.Keywords: Massive MIMO, large scale MIMO, constant envelope precoding, multienvelope precoding. Ö ZET BÜYÜK Ç OK GİRDİLİ Ç OK Ç IKTILI SİSTEMLERDE Ç OK GENLİKLİÖN KODLAMA Mücahit Gümüş Elektrik ve Elektronik Mühendisligi, Yüksek LisansTez Danışmanı: Tolga Mete Duman Mayıs 2017Kablosuz iletişim, bilgi ve iletişim teknolojilerininönemli bir parçasıdır.Özellikle 5G kablosuz iletişim teknolojilerinin takdimi ile birlikte, daha yüksek veri hızları, gelişmiş güç verimliligi veçok az gecikme süreleri gibi talepler oluşmuştur. Ç ok girdiliçokçıktılı sistemler beklentileri karşılamak yolunda umut veren teknolojilerdendir ancakçok girdiliçokçıktılı sistemlerdeşu anda kullanılan anten sayıları potansiyeliçıkarmak içinçok azdıır. Bu yüzden, baz istasyonlar...

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Section: Massive Mimo Systemsmentioning

confidence: 99%

Multi-Envelope Precoding for Massive MIMO Systems

Gümüş

Duman

2018

IEEE Wireless Commun. Lett.

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“…Using UWB signal has attracted significant research interests and become a standard as IEEE 802.15.4a [2]. However, the full-digital coherent IR-UWB system requires the bandwidth of several GHz to guarantee sub-meter ranging accuracy, which increases the overall hardware cost and processing power dramatically [3]. Some techniques, e.g., energy receiver and finite-resolution digital receiver, have been proposed to lower the overall complexity [3] [4] [5].…”

Section: Introductionmentioning

confidence: 99%

“…However, the full-digital coherent IR-UWB system requires the bandwidth of several GHz to guarantee sub-meter ranging accuracy, which increases the overall hardware cost and processing power dramatically [3]. Some techniques, e.g., energy receiver and finite-resolution digital receiver, have been proposed to lower the overall complexity [3] [4] [5]. Although much lower complexity can be achieved, it is still very expensive and requires additional special hardware.…”

Section: Introductionmentioning

confidence: 99%

Acoustic ranging and communication via microphone channel

Liu

2012

2012 IEEE Global Communications Conference (GLOBECOM)

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Absolute GPS-coordinates are typically inaccessible indoor. Pervasive smartphones offer new opportunities for relative indoor localization. The low-complexity and high-accuracy ranging under the communication-link is a crucial requirement for enabling location sensing in indoor environments. In this paper, we propose a Time-of-Arrival (TOA) estimation and communication scheme utilizing the ubiquitous speaker/microphone pair to achieve accurate ranging. To compensate for the performance loss caused by this simple device, an optimized TOA estimation method is proposed for enhanced ranging reliability and accuracy. To overcome the strong channel fading in acoustic communication, a dynamic demodulation method that jointly uses frequency and amplitude information has been proposed. Experimental results show that our proposed scheme can achieve near 8cm TOA ranging accuracy and 0.55% communication biterror-rate (BER) with 70% probability.

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“…However, as a sampling rate of several giga samples per second is needed to digitize IR-UWB signals, implementing high-resolution analog-to-digital converters (ADCs) becomes formidable due to the impractically high power consumption and complexity. Thus, applying finiteresolution ADCs, especially single-bit (monobit) ADCs, has attracted a lot of interest [6,7]. Made by one or several comparators, finite-resolution ADCs work with much lower power consumption and complexity than high-resolution ones [6].…”

Section: Introductionmentioning

confidence: 99%

“…Thus, applying finiteresolution ADCs, especially single-bit (monobit) ADCs, has attracted a lot of interest [6,7]. Made by one or several comparators, finite-resolution ADCs work with much lower power consumption and complexity than high-resolution ones [6]. Nevertheless, finite-resolution ADCs, especially monobit ones, also lead to serious degradation on the performance of IR-UWB systems [7].…”

Section: Introductionmentioning

confidence: 99%

Low complexity suboptimal monobit receiver for transmitted-reference impulse radio UWB systems

Khani

Nie

Xiang

et al. 2012

2012 IEEE Global Communications Conference (GLOBECOM)

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In this paper, a low complexity suboptimal monobit receiver, denoted as Q-function estimation (QFE) based monobit receiver, is proposed for transmitted-reference (TR) based impulse radio (IR) ultra wideband (UWB) systems to mitigate the performance degradation caused by severe quantization noise due to employing monobit ADCs. Through accumulating reference samples over multiple blocks, the QFE-based monobit receiver can considerably reduce the noise-on-noise effect and optimize the contribution of each sample to the decision statistic. Computer simulations demonstrate that in both line-of-sight (LOS) and non-LOS (NLOS) channels the QFE-based monobitweighted TR receiver can achieve a close-to-optimal bit-error rate (BER) performance without requiring full channel state information. Furthermore, because the optimal combining weights can be obtained offline and saved into a lookup table, the complexity of the proposed suboptimal monobit receiver is quite low. Therefore, it is considered as a promising technology for IR-UWB applications requiring low system complexity and low power consumption.

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Monobit digital receivers: design, performance, and application to impulse radio

Cited by 61 publications

References 18 publications

Multi-Envelope Precoding for Massive MIMO Systems

Multi-Envelope Precoding for Massive MIMO Systems

Acoustic ranging and communication via microphone channel

Low complexity suboptimal monobit receiver for transmitted-reference impulse radio UWB systems

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