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This paper presents the methodology and results of several trials carried out in order to test the effects of impulsive noise source in IoT wireless systems. The impulsive noise generated by fluorescent lamps at 433 MHz and 868 MHz has been measured and recorded. Using these measurements an impulsive noise generator has been developed. Then, with the generated noise two IoT systems have been interfered...
Symmetric α-stable (SαS) distribution noise is widely used to model co-channel and network interference in wireless communication systems. As robust and adaptive techniques, myriad filtering (MyF) and spherically symmetric vector MyF have been applied to suppress univariate and spherically symmetric multivariate SαS distribution noise, respectively. At a communication receiver, the received band-pass...
In order to analyze the reason of electromagnetic (EM) interference between the BeiDOU and GPS receivers, the behavior model of RF front-end for the GPS receiver is built, and the IF output which is interfered by the BeiDou transmit signal is simulated. The simulation results are validated by the experiment. Both the simulation and experiment results show that the GPS RF front-end is suppressed due...
In this paper, we investigate the detection of single-carrier transmission over frequency selective fading channels with symmetric alpha-stable (SαS) noise. To mitigate the effects of the inter-symbol interference (ISI) cased by multi-path propagation and the destructive impulsive noise, a non-linear myriad filter is firstly adopted and an asymptotic statistic method is then introduced for to analyze...
In this paper, exact performance analyses of the noncoherent ultra-wideband differential transmitted reference systems are evaluated in the correlated Nakagami-m fading channels via applying the characteristic function (CF) method, where the correlated channel model is derived from the bivariate Nakagami-m distribution. Moreover, the independent Nakagami-m fading channel is considered as a special...
Coordinated Multi-Point (CoMP) processing is one of the promising methods to mitigate the intra- cluster interference in cellular systems, to improve the average Signal-to-Interference-plus- Noise Ratio (SINR), and to increase the overall spectral efficiency. Such method, however, does not take any action to mitigate the inter-cluster interference, which leads to poor performance for cluster-edge...
In this paper, we analyze the Gaussian X channel in the mixed interference regime. In this regime, multiple access transmission to one of the receivers is shown to be close to optimal in terms of sum rate. Three upper bounds are derived for the sum capacity in the mixed interference regime, and the subregions where each of these bounds dominate the others are identified. The genie-aided sum capacity...
It has been shown that the performance of power line communication (PLC) systems can be severely limited by non-Gaussian and, in particular, impulsive interference from a variety of sources. The non-Gaussian nature of this interference provides an opportunity for its effective mitigation by nonlinear filtering. In this paper, we introduce blind adaptive analog nonlinear filters, referred to as Adaptive...
It is well known that the narrowband interference (NBI) has severely degraded the quality of the received GPS signal and even demolish the operation of GPS receivers. Therefore, we propose using a frequency domain approach to excise NBIs for GPS receivers. Furthermore, we numerically analysis the impact of our proposed jamming excisor on the tracking loops for GPS receivers. Finally, we compare the...
In WLAN systems, distributed coordination function (DCF) is used to avoid transmission collision. When an error occurs, the transmitter extends its contention window for the next retransmission to avoid more errors. But this may cause an unfairness problem; in noisy conditions MTs may find it difficult to get transmission opportunities, especially in a heterogeneous network with a large number of...
The simple scheme of treating interference as noise (TIN) is studied in this paper for the 3 × 2 X channel. A new sum-capacity upper bound is derived. This upper bound is transformed into a generalized degrees-of-freedom (GDoF) upper bound, and is shown to coincide with the achievable GDoF of a scheme that combines TDMA and TIN for some conditions on the channel parameters. These conditions specify...
Typical home automation systems consist of dense populated sensors and actuators in wireless networks. In apartment houses, networks are often deployed closely to each other by different neighbors. In such scenarios wireless networks suffer from packet loss caused by interference with other networks. Packet loss causes unnecessary delay and energy consumption. To overcome this, transmission power...
Interference cancellation is a key design concern for next-generation communication systems. One practical approach is the so-called interference rejection combining (IRC) scheme which treat interference as a stationary Gaussian process to simplify interference suppression design. However, this stationary assumption does not hold in practice; in particular, the statistics of the pilot and the data...
This paper presents a Game Theoretic framework for the analysis of distributed spectrum sharing in a Cognitive Radio Network (CRN). We consider competitive interactions among selfish secondary users (SUs) under realistic physical interference constraints. Subject to a per-user average power budget, SUs choose their transmission powers with the objective of satisfying minimum signal-to-interference...
We establish an achievable rate region for discrete memoryless interference relay channels that consist of two source-destination pairs and one or more relays. We develop an achievable scheme combining Han-Kobayashi and noisy network coding. We apply our achievability to two cases. First, we characterize the capacity region of some classes of discrete memoryless interference relay channels. These...
We consider the problem of separating simultaneous source blended data in applied seismology. Cross-source interference that masks the desired signal in the common source domain can be translated into incoherent noise by rearranging the data in the common receiver domain. We show that applying a virtual blending/deblending process to the data in the common receiver domain enables obtaining an additional...
Interfering levels are most significant to define compatibility between radio systems. Common equations calculate the threshold levels in terms of power and field-strength. These thresholds are used to protect radio services from interfering radiators, in particular, incidental radiators such as PLT, cable installations and ISM. Assuming the minimum distance from interferer to victim, the spectrum...
In this circuit, a UWB LNA circuit with new input stage is proposed. In this scheme, a combination of coupled inductors and a new structure based on notch filter in input stage is utilized. As a result, the input stage is able to easily reject in-band and out-band interference with 43.2 dB and 25.1 dB respectively. This input stage is applied in an LNA. The simulations verify that the LNA has a peak...
We propose and evaluate the performance of a cascaded THP and BD system (THP-BD) for a MIMO downlink in which BD is used to mitigate multi-user interference and THP is used to mitigate spatial interference. We show that at moderate to high SNR, the cascaded THP-BD system achieves the same error performance as the system employing THP on a multi-user MIMO (MU-MIMO) downlink. Also, symbol error rate...
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