A Computationally Lightest and Robust Neural Network Receiver for Ultra Wideband Time Hopping Communication Systems

Ershadh, Mohamed; Meenakshi, M.

doi:10.1109/tvt.2021.3071511

Cited by 7 publications

(5 citation statements)

References 23 publications

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“…Subsequently, in 2000, Win and Scholtz employed TH-PPM as an approach for ultra-wideband (UWB) communication. Then the Federal Communications Commission (FCC) in 2002 allocated a substantial frequency band to UWB, rendering it freely available [ 10 , 11 , 12 , 13 , 14 , 15 ]. This development enabled the integration of UWB into the civilian sector, with TH-PPM emerging as a vital means within this landscape in the subsequent years [ 16 , 17 , 18 , 19 , 20 , 21 ].…”

Section: Introductionmentioning

confidence: 99%

A Novel Non-Coherent Q-Ary TH-PPM Transceiver

Wang,

Tian,

et al. 2023

Sensors

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Time-hopping pulse position modulation (TH-PPM) stands out as a secure communication due to the pseudo-random characteristics of its time-hopping sequence. However, the conventional TH-PPM transceiver encounters challenges in implementation, particularly in achieving the requisite high precision for synchronization. This paper introduces a novel non-coherent Q-ary TH-PPM transceiver, designed to surpass the Bit error rate (BER) performance of conventional TH-PPM transceivers in scenarios under non-ideal synchronization conditions, which also being straightforward to implement. Firstly, we provide an overview of the conventional TH-PPM transceiver. Secondly, the novel TH-PPM transceiver is introduced. In this context, a novel method for generating the TH-PPM signal is proposed for the transmitter, and a parallel matched-filter algorithm, adapted to the new TH-PPM signal, is presented for the receiver. Subsequently, the investigation delves into an in-depth analysis of BER performance, considering both ideal synchronization conditions and non-ideal synchronization conditions, for both the conventional and the new TH-PPM transceiver. Furthermore, the paper proposes a numerical simulation to validate the theoretical findings. The results demonstrate that the new TH-PPM transceiver outperforms the conventional counterpart by showing better BER performance in scenarios with non-ideal synchronization conditions.

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Section: Introductionmentioning

confidence: 99%

A Novel Non-Coherent Q-Ary TH-PPM Transceiver

Wang,

Tian,

et al. 2023

Sensors

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“…Recently, the GatedNet and the computational lightest receiver based on the multilayer perceptron (MLP) neural network have been proposed for TH-IR UWB systems in [133] and [134], respectively. These neural networks are trained using noiseless samples, which avoids the concerns about the noise model or training SNR to maintain good performance in online detection.…”

Section: Chapter 4 An Orientational Beamforming System Based On the R...mentioning

confidence: 99%

“…In order to reduce computational complexity and training time, the number of hidden layers is kept small (usually ≤3) in existing neural network receivers for UWB systems [134]. Compared with the fully connected DNN or MLP neural network, the radial basis function (RBF) neural network is more attractive in some situations due to its fewer parameters to be trained [135].…”

Section: Chapter 4 An Orientational Beamforming System Based On the R...mentioning

confidence: 99%

“…Since the OBF system relies on the LOS propagations between matched transmitting and receiving antennas to achieve the orientational gain for the desired signal, we only consider the LOS environment in this chapter. The LOS assumption is reasonable in many residential and office environments and is commonly adopted in current neural network receivers for UWB systems [131,134]. Since the multipath channel will distort the relationship between the transmitted signal and the received signal described in (4.13), the training set should be modified in this case.…”

Section: Adaptations In Multipath Channelsmentioning

confidence: 99%

“…Since the multipath channel will distort the relationship between the transmitted signal and the received signal described in (4.13), the training set should be modified in this case. In [131] and [134],…”

Section: Adaptations In Multipath Channelsmentioning

confidence: 99%

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New techniques for orientational beamforming systems

Han

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Space division multiple access (SDMA) is widely used in modern wireless communication systems to substantially increase spectral efficiency and attainable channel capacity. The SDMA technique implements an antenna array to separate different users according to their directions through beamforming. Adaptive beamforming techniques and direction of arrival (DOA) estimation methods have been extensively investigated and adopted in SDMA to adapt the array beam to each user while nulling out multiuser interference (MUI), thereby increasing the channel capacity. Recently, another spatial dimension, named array orientation, has been explored, which provides an additional degree of freedom for further increasing channel capacity and spectral efficiency of SDMA. The orientational beamforming (OBF) system is employed to exploit the new spatial dimension, which spatially filters signals according to the orientations of the transmitting and receiving arrays regardless of the signals' directions. Therefore, it can effectively separate co-channel users lying in close directions, which, together with low co-channel interference in the array orientation dimension of the spatial domain, further increase the attainable channel capacity. However, essential techniques required for the OBF system to achieve the expected increase in channel capacity have remained to be investigated in-depth so far. This thesis mainly focuses on new techniques for the OBF system to fill the gap.Considering the coexistence of the OBF system and other wireless communication systems, there are two kinds of interference that primarily deteriorate the performance of the OBF system, which are directional interference and MUI. Therefore, this thesis first studies algorithms for suppressing these two kinds of interference in the OBF system. For directional interference suppression, three adaptive OBF algorithms, namely the orientational maximum signal-to-interferenceplus-noise ratio (O-MSINR) and orientational linearly constrained minimum variance (O-LCMV) algorithms, and the orientational generalized sidelobe canceller (O-GSC),

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Design and Analysis of VLC-OCC-CDMA Rake System

Qiu

Dong³

et al. 2023

Lecture Notes in Computer Science

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A Computationally Lightest and Robust Neural Network Receiver for Ultra Wideband Time Hopping Communication Systems

Cited by 7 publications

References 23 publications

A Novel Non-Coherent Q-Ary TH-PPM Transceiver

A Novel Non-Coherent Q-Ary TH-PPM Transceiver

New techniques for orientational beamforming systems

Design and Analysis of VLC-OCC-CDMA Rake System

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