The Experts below are selected from a list of 920919 Experts worldwide ranked by ideXlab platform
Jan Rabaey - One of the best experts on this subject based on the ideXlab platform.
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a 2 4 ghz Interferer resilient wake up receiver using a dual if multi stage n path architecture
IEEE Journal of Solid-state Circuits, 2016Co-Authors: Camilo Salazar, Andreia Cathelin, Andreas Kaiser, Jan RabaeyAbstract:A 2.4 GHz Interferer-resilient wake-up receiver for ultra-low power wireless sensor nodes uses an uncertain-IF dual-conversion topology, combining a distributed multi-stage N-path filtering technique with an unlocked low-Q resonator-referred local oscillator. This structure provides narrow-band selectivity and strong immunity against Interferers, while avoiding expensive external resonant components such as BAW resonators or crystals. The 65 nm CMOS receiver prototype provides a sensitivity of −97 dBm and a carrier-to-Interferer ratio better than −27 dB at 5 MHz offset, for a data rate of 10 kb/s at a 10−3 bit error rate, while consuming 99 $\mu \text{W}$ from a 0.5 V voltage supply under continuous operation.
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A 2.4 GHz Interferer-Resilient Wake-Up Receiver Using A Dual-IF Multi-Stage N-Path Architecture
IEEE Journal of Solid-State Circuits, 2016Co-Authors: Camilo Salazar, Andreia Cathelin, Andreas Kaiser, Jan RabaeyAbstract:A 2.4 GHz Interferer-resilient wake-up receiver for ultra-low power wireless sensor nodes uses an uncertain-IF dualconversion topology, combining a distributed multi-stage N-path filtering technique with an unlocked low-Q resonator-referred local oscillator. This structure provides narrow-band selectivity and strong immunity against Interferers, while avoiding expensive external resonant components such as BAW resonators or crystals. The 65 nm CMOS receiver prototype provides a sensitivity of -97 dBm and a carrier-to-Interferer ratio better than -27 dB at 5 MHz offset, for a data rate of 10 kb/s at a 10-3 bit error rate, while consuming 99 μW from a 0.5 V voltage supply under continuous operation.
Camilo Salazar - One of the best experts on this subject based on the ideXlab platform.
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a 2 4 ghz Interferer resilient wake up receiver using a dual if multi stage n path architecture
IEEE Journal of Solid-state Circuits, 2016Co-Authors: Camilo Salazar, Andreia Cathelin, Andreas Kaiser, Jan RabaeyAbstract:A 2.4 GHz Interferer-resilient wake-up receiver for ultra-low power wireless sensor nodes uses an uncertain-IF dual-conversion topology, combining a distributed multi-stage N-path filtering technique with an unlocked low-Q resonator-referred local oscillator. This structure provides narrow-band selectivity and strong immunity against Interferers, while avoiding expensive external resonant components such as BAW resonators or crystals. The 65 nm CMOS receiver prototype provides a sensitivity of −97 dBm and a carrier-to-Interferer ratio better than −27 dB at 5 MHz offset, for a data rate of 10 kb/s at a 10−3 bit error rate, while consuming 99 $\mu \text{W}$ from a 0.5 V voltage supply under continuous operation.
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A 2.4 GHz Interferer-Resilient Wake-Up Receiver Using A Dual-IF Multi-Stage N-Path Architecture
IEEE Journal of Solid-State Circuits, 2016Co-Authors: Camilo Salazar, Andreia Cathelin, Andreas Kaiser, Jan RabaeyAbstract:A 2.4 GHz Interferer-resilient wake-up receiver for ultra-low power wireless sensor nodes uses an uncertain-IF dualconversion topology, combining a distributed multi-stage N-path filtering technique with an unlocked low-Q resonator-referred local oscillator. This structure provides narrow-band selectivity and strong immunity against Interferers, while avoiding expensive external resonant components such as BAW resonators or crystals. The 65 nm CMOS receiver prototype provides a sensitivity of -97 dBm and a carrier-to-Interferer ratio better than -27 dB at 5 MHz offset, for a data rate of 10 kb/s at a 10-3 bit error rate, while consuming 99 μW from a 0.5 V voltage supply under continuous operation.
Robert W. Heath - One of the best experts on this subject based on the ideXlab platform.
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accurately accounting for random blockage in device to device mmwave networks
Global Communications Conference, 2017Co-Authors: Enass Hriba, Kiran Venugopal, Matthew C. Valenti, Robert W. HeathAbstract:Millimeter-wave systems are characterized by the use of highly directional antennas and the presence of blockages, which significantly alter the path-loss and small-scale fading parameters. The received power of each Interferer depends on the direction it points and whether it is line-of- sight (LOS), non-LOS (i.e., partially blocked), or completely blocked. While Interferers that are sufficiently far away will almost certainly be completely blocked, a finite number of Interferers in close proximity will be subject to random partial blockages. Previous attempts to characterize mmWave networks have made the simplifying assumption that all Interferers within some radius, called the LOS ball, are unblocked, while Interferers beyond that radius are non-LOS. However, compared to simulation results, the LOS ball assumption tends to overestimate outage. In this paper, we present an accurate yet tractable analysis of finite mmWave networks that dispenses with the LOS ball assumption. In the analysis, each Interferer has a distribution that is selected randomly from several possibilities, each representing different blockage and directivity states. First, the exact outage probability is found for a finite network with Interferers in fixed locations. Then, the spatially averaged outage probability is found by averaging over the Interferer locations. While the focus is on device-to-device networks, the analysis is general enough to find applications outside of the present mmWave framework.
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Analysis of millimeter wave networked wearables in crowded environments
Conference Record - Asilomar Conference on Signals Systems and Computers, 2016Co-Authors: Kiran Venugopal, Matthew C. Valenti, Robert W. HeathAbstract:The millimeter wave (mmWave) band has the potential to provide high throughput among wearable devices. When mmWave wearable networks are used in crowded environments, such as on a bus or train, antenna directivity and orientation hold the key to achieving Gbps rates. Previous work using stochastic geometry often assumes an infinite number of interfering nodes drawn from a Poisson Point Process (PPP). Since indoor wearable networks will be isolated due to walls, a network with a finite number of nodes may be a more suitable model. In this paper, we characterize the significant sources of interference and develop closed-form expressions for the spatially averaged performance of a typical user's wearable communication link. The effect of human body blockage on the mmWave signals and the role of network density are investigated to show that an increase in Interferer density reduces the mean number of significant Interferers.
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Modeling heterogeneous network interference using poisson point processes
IEEE Transactions on Signal Processing, 2013Co-Authors: Robert W. Heath, Marios Kountouris, Tianyang BaiAbstract:Cellular systems are becoming more heterogeneous with the introduction of low power nodes including femtocells, relays, and distributed antennas. Unfortunately, the resulting interference environment is also becoming more complicated, making evaluation of different communication strategies challenging in both analysis and simulation. Leveraging recent applications of stochastic geometry to analyze cellular systems, this paper proposes to analyze downlink performance in a fixed-size cell, which is inscribed within a weighted Voronoi cell in a Poisson field of Interferers. A nearest out-of-cell Interferer, out-of-cell Interferers outside a guard region, and cross-tier Interferers are included in the interference calculations. Bounding the interference power as a function of distance from the cell center, the total interference is characterized through its Laplace transform. An equivalent marked process is proposed for the out-of-cell interference under additional assumptions. To facilitate simplified calculations, the interference distribution is approximated using the Gamma distribution with second order moment matching. The Gamma approximation simplifies calculation of the success probability and average rate, incorporates small-scale and large-scale fading, and works with co-tier and cross-tier interference. Simulations show that the proposed model provides a flexible way to characterize outage probability and rate as a function of the distance to the cell edge.
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modeling heterogeneous network interference using poisson point processes
arXiv: Information Theory, 2012Co-Authors: Robert W. Heath, Marios KountourisAbstract:Cellular systems are becoming more heterogeneous with the introduction of low power nodes including femtocells, relays, and distributed antennas. Unfortunately, the resulting interference environment is also becoming more complicated, making evaluation of different communication strategies challenging in both analysis and simulation. Leveraging recent applications of stochastic geometry to analyze cellular systems, this paper proposes to analyze downlink performance in a fixed-size cell, which is inscribed within a weighted Voronoi cell in a Poisson field of Interferers. A nearest out-of-cell Interferer, out-of-cell Interferers outside a guard region, and cross-tier interference are included in the interference calculations. Bounding the interference power as a function of distance from the cell center, the total interference is characterized through its Laplace transform. An equivalent marked process is proposed for the out-of-cell interference under additional assumptions. To facilitate simplified calculations, the interference distribution is approximated using the Gamma distribution with second order moment matching. The Gamma approximation simplifies calculation of the success probability and average rate, incorporates small-scale and large-scale fading, and works with co-tier and cross-tier interference. Simulations show that the proposed model provides a flexible way to characterize outage probability and rate as a function of the distance to the cell edge.
Andreas Kaiser - One of the best experts on this subject based on the ideXlab platform.
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a 2 4 ghz Interferer resilient wake up receiver using a dual if multi stage n path architecture
IEEE Journal of Solid-state Circuits, 2016Co-Authors: Camilo Salazar, Andreia Cathelin, Andreas Kaiser, Jan RabaeyAbstract:A 2.4 GHz Interferer-resilient wake-up receiver for ultra-low power wireless sensor nodes uses an uncertain-IF dual-conversion topology, combining a distributed multi-stage N-path filtering technique with an unlocked low-Q resonator-referred local oscillator. This structure provides narrow-band selectivity and strong immunity against Interferers, while avoiding expensive external resonant components such as BAW resonators or crystals. The 65 nm CMOS receiver prototype provides a sensitivity of −97 dBm and a carrier-to-Interferer ratio better than −27 dB at 5 MHz offset, for a data rate of 10 kb/s at a 10−3 bit error rate, while consuming 99 $\mu \text{W}$ from a 0.5 V voltage supply under continuous operation.
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A 2.4 GHz Interferer-Resilient Wake-Up Receiver Using A Dual-IF Multi-Stage N-Path Architecture
IEEE Journal of Solid-State Circuits, 2016Co-Authors: Camilo Salazar, Andreia Cathelin, Andreas Kaiser, Jan RabaeyAbstract:A 2.4 GHz Interferer-resilient wake-up receiver for ultra-low power wireless sensor nodes uses an uncertain-IF dualconversion topology, combining a distributed multi-stage N-path filtering technique with an unlocked low-Q resonator-referred local oscillator. This structure provides narrow-band selectivity and strong immunity against Interferers, while avoiding expensive external resonant components such as BAW resonators or crystals. The 65 nm CMOS receiver prototype provides a sensitivity of -97 dBm and a carrier-to-Interferer ratio better than -27 dB at 5 MHz offset, for a data rate of 10 kb/s at a 10-3 bit error rate, while consuming 99 μW from a 0.5 V voltage supply under continuous operation.
Andreia Cathelin - One of the best experts on this subject based on the ideXlab platform.
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a 2 4 ghz Interferer resilient wake up receiver using a dual if multi stage n path architecture
IEEE Journal of Solid-state Circuits, 2016Co-Authors: Camilo Salazar, Andreia Cathelin, Andreas Kaiser, Jan RabaeyAbstract:A 2.4 GHz Interferer-resilient wake-up receiver for ultra-low power wireless sensor nodes uses an uncertain-IF dual-conversion topology, combining a distributed multi-stage N-path filtering technique with an unlocked low-Q resonator-referred local oscillator. This structure provides narrow-band selectivity and strong immunity against Interferers, while avoiding expensive external resonant components such as BAW resonators or crystals. The 65 nm CMOS receiver prototype provides a sensitivity of −97 dBm and a carrier-to-Interferer ratio better than −27 dB at 5 MHz offset, for a data rate of 10 kb/s at a 10−3 bit error rate, while consuming 99 $\mu \text{W}$ from a 0.5 V voltage supply under continuous operation.
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A 2.4 GHz Interferer-Resilient Wake-Up Receiver Using A Dual-IF Multi-Stage N-Path Architecture
IEEE Journal of Solid-State Circuits, 2016Co-Authors: Camilo Salazar, Andreia Cathelin, Andreas Kaiser, Jan RabaeyAbstract:A 2.4 GHz Interferer-resilient wake-up receiver for ultra-low power wireless sensor nodes uses an uncertain-IF dualconversion topology, combining a distributed multi-stage N-path filtering technique with an unlocked low-Q resonator-referred local oscillator. This structure provides narrow-band selectivity and strong immunity against Interferers, while avoiding expensive external resonant components such as BAW resonators or crystals. The 65 nm CMOS receiver prototype provides a sensitivity of -97 dBm and a carrier-to-Interferer ratio better than -27 dB at 5 MHz offset, for a data rate of 10 kb/s at a 10-3 bit error rate, while consuming 99 μW from a 0.5 V voltage supply under continuous operation.
