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In this paper, we describe a spectrum access system (SAS) based Citizens Broadband Radio Service (CBRS) field trial using a live LTE network in the 3.5 GHz band. The latest WInnForum specification guided the implementation of the relevant protocols for SAS operation. Here, we evaluate the performance of a CBRS field trial by using one of the most important performance indicators in a spectrum sharing...
While 802.11 Access Points (APs) can have as many as eight antennas, form factor constraints often limit mobile clients to a single antenna, thereby precluding spatial multiplexing. In this paper, we design, implement, and experimentally evaluate Diverse Spectrum Spatial Multiplexing (DSSM), the first system to enable uplink spatial multiplexing for clients with a single Wi-Fi antenna. We show how...
Spectrum sharing in the 3.5 GHz band between commercial and government users along U.S. coastal areas depends on an Environmental Sensing Capability (ESC), a network of radio frequency sensors and a decision system, to detect the presence of incumbent shipborne radar systems and trigger protective measures, as needed. It is well known that the sensitivity of these sensors depends on the aggregate...
This paper develops a regulatory model denoted the dynamic policy license. The dynamic policy license combines the assurances to licensees that come from holding a fixed license while maintaining regulatory flexibility. A dynamic policy license is similar to a traditional spectrum license that specifies a bandwidth, power, center frequency, location, and other parameters. However, one or more of these...
The combination of emerging new communication technologies, economic growth, and current limitations on the amount of available dedicated spectrum necessitate sharing spectrum dynamically between incumbent (primary) users and opportunistic (secondary) users. This paper builds upon the seminal “spectrum jails” paradigm — a mathematical model for light-handed ex-post enforcement. Analyzing this as a...
A geospatial analysis component is beneficial to the Radio Frequency Interference Monitoring System (RFIMS). RFIMS will be implemented due to auctioned-based spectrum sharing between the National Oceanic and Atmospheric Administration (NOAA) meteorological setellite downlink stations and commercial wireless providers. The geospatial component provides a cost effective and quick processing method to...
In spectrum sharing, incumbents with sensitive parameters require full protection of their operations. The incumbent's protection includes the protection of its privacy (e.g., operational frequency) against inference attacks carried out by malicious authorized secondary users. In this paper, we develop an analytical model to analyze the vulnerability of the incumbent's frequency to inference attacks...
Wideband spectrum sensing aims to identify the occupied frequency bands. Conventional methods for single antenna spectrum sensors threshold the received power spectra to detect discrete frequency bins that are occupied. However, such methods neither group bins that are occupied by the same signal nor aggregate occupied bins over time to learn distinct frequency bands occupied by intermittently transmitting...
Wireless services that rely on Dynamic Spectrum Access (DSA) or spectrum sharing mechanisms require a well-defined means to communicate how each device or system is using spectrum resources in a particular environment or situation so that the devices that receive such information can make rational decisions on the possible use of the spectrum. Spectrum consumption models (SCMs) address this issue...
This paper presents the world's first technical and regulatory pilot on Licensed Shared Access (LSA) in the 3GPP Band 40, i.e. 2.3–2.4 GHz band, enacted in Italy to delve deeper on the role that spectrum sharing has for efficient use of spectrum. The Italian Administration, in collaboration with the Joint Research Centre of the European Commission and the support of a consortium of industrial partners,...
We survey the latest advances in machine learning with deep neural networks by applying them to the task of radio modulation recognition. Results show that ratio modulation recognition is not limited by network depth and further work should focus on improving learned synchronization and equalization. Advances in these areas will likely come from novel architectures designed for these tasks or through...
Spectrum policy in the US (and throughout most of the world) consists generally of a set of nationally determined policies that apply uniformly to all localities. However, it is also true that there is considerable variation in the features (e.g., traffic demand or population density), requirements and constraints of spectrum use on a local basis. Global spectrum policies designed to resolve a situation...
In this work, we study the wideband sensing problem of detecting intermittently transmitting signals that may have partial spectral overlap. We aim to estimate the frequency bands occupied by transmitters using standards with overlapping frequency bands, such as IEEE 802.11, and those without guard bands, such as LTE-Advanced. Multiple power spectrum measurements are used to distinguish the distinct...
We propose to demonstrate and obtain community feedback on the RadioHound system, a custom spectrum sensing network capable of tuning from 25 MHz to 6 GHz, which covers nearly all widely-deployed wireless activity. We describe the system hardware and network infrastructure in detail with a view towards driving the cost, size, and power usage of the sensors as low as possible.
In wireless communication it is assumed that transmitting nodes are unable to detect collisions. However, using recent advances in in-band full duplex, a system can be developed where the self-transmitted signal is sufficiently canceled in order to detect ongoing collisions. Enabling concurrent transmission and collision detection can greatly improve wireless communication by enhancing throughput...
We present Electrosense: a distributed, collaborative and low-cost wireless spectrum monitoring solution which is deployed on a large scale. The proposed framework provides tools to enable and promote a crowdsourced open spectrum monitoring platform for wide area deployments. The collected spectrum data is stored and processed in the backend which can be easily retrieved by the users through an open...
With the next-generation over-the-air (OTA) TV standard, Advanced Television Systems Committee (ATSC) 3.0, TV receiver feedback via broadband or dedicated radio channel will become a standard feature. Real-time TV receiver feedback potentially allows secondary users to access active TV channels without interfering with TV users, which would bring 6–10-fold data rate increase on top of the current...
We evaluate for the existing UHF U.S. TV stations two ways to increase the spectrum reuse to repack them in a smaller block without reducing the coverage or bandwidth of any TV station. One way is to increase the transmit power of each broadcaster's only transmitter by the same number of dB, and another more effective way is to replace that transmitter with a low-power low-tower (LPLT) Single Frequency...
With the exploding popularity of all things wireless, the radio spectrum has become a scarce commodity. Consequently, spectrum sharing, as a means to enhance efficiency in spectrum use has become closer from theory to practice. However, there are several challenges that need to be addressed before spectrum sharing becomes reality. One of the challenges of this sharing scheme is how we monitor the...
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