We present new exponential bounds for the Gaussian Q function (one- and two-dimensional) its inverse, M-ary phase-shift-keying (MPSK), differential (MDPSK) error probabilities over additive white noise channels. More precisely, are in form of sum functions that, limit, approach exact value. Then, a quite accurate simple approximate expression given by two is reported. The results applied to general problem evaluating average probability fading Some examples applications also presented...

In this paper, we investigate the capacity distribution of spatially correlated, multiple-input-multiple-output (MIMO) channels. particular, derive a concise closed-form expression for characteristic function (c.f.) MIMO system with arbitrary correlation among transmitting antennas or receiving in frequency-flat Rayleigh-fading environments. Using exact c.f., probability density (pdf) and cumulative (CDF) can be easily obtained, thus enabling evaluation outage mean correlated Our results are...

Network localization and navigation give rise to a new paradigm for communications contextual data collection, enabling variety of applications that rely on position information mobile nodes (agents). The performance such networks can be significantly improved via the use cooperation. Therefore, deep understanding exchange cooperation in network is crucial design location-aware networks. This article presents an exploration cooperative from theoretical foundation applications, covering...

An uncertain knowledge of the noise power level can severely limit energy detector (ED) spectrum sensing capability. In some situations this uncertainty cause signal-to-noise ratio (SNR) penalties or even rise SNR wall phenomenon. paper we analyze performance ED with estimated (ENP), addressing threshold design and giving conditions for existence wall. We derive analytical expressions curves (SNR vs. observation time a target performance) ENP-ED. Then apply our analysis to cognitive radio...

In this paper, a random access scheme is introduced which relies on the combination of packet erasure correcting codes and successive interference cancellation (SIC).The named coded slotted ALOHA.A bipartite graph representation SIC process, resembling iterative decoding generalized low-density parity-check over channel, exploited to optimize selection probabilities component via density evolution analysis.The capacity (in packets per slot) then analyzed in context collision channel without...

In this paper, a novel extrinsic information transfer (EXIT) analysis is presented for protograph-based and multi- edge type low-density parity-check (LDPC) codes. A protograph defines subset of an LDPCC ensemble (identified by the degree distributions bipartite graph), introducing further constraints about connections. For many codes belonging to class, conventional approach based on EXIT charts cannot be applied. The proposed takes into account connections, permitting decoding convergence...

This paper considers the analysis of optimum combining systems in presence both co-channel interference and thermal noise. We address cases where either desired-user or interferers undergo Rician fading. Exact expressions are derived for moment generating function SINR which apply arbitrary numbers antennas interferers. Based on these, we obtain symbol error probability with M-PSK. For case undergoes fading, also derive exact closed-form moments SINR. show that these directly related to...

Random matrices play a crucial role in the design and analysis of multiple-input multiple-output (MIMO) systems. In particular, performance MIMO systems depends on statistical properties subclass random known as Wishart when propagation environment is characterized by Rayleigh or Rician fading. This paper focuses stochastic this class proposes general methodology to evaluate some multiple nested integrals interest. With we obtain closed-form expression for joint probability density function...

In this paper, we analyze the capacity of multiple-input multiple-output (MIMO) Rayleigh-fading channels in presence spatial fading correlation at both transmitter and receiver, assuming channel is unknown perfectly known receiver. We first derive determinant representation for exact characteristic function capacity, which then used to determine trace representations mean, variance, skewness, kurtosis, other higher-order statistics (HOS). These results allow us exactly evaluate two relevant...

Ultra-wide-band (UWB) signals are suitable for underlay communications, over a frequency band where, possibly, other systems active. Such coexistence of UWB and is possible if the mutual interference has small impact on their respective performance. This paper aims to present recent results among conventional narrow-band (NB) systems. Specifically, we consider point-to-point under generated by finite number NB radio transmitters. We channels including additive white Gaussian noise multipath...

Multiple-input multiple-output (MIMO) systems are being considered as one of the key enabling technologies for future wireless networks. However, decrease in capacity due to presence interferers MIMO networks is not well understood. In this paper, we develop an analytical framework characterize communication multiple co-channel and noise. We consider situation which transmitters have no channel state information, all links undergo Rayleigh fading. first generalize determinant representation...

Precise localization and tracking of moving objects is great interest for a variety emerging applications including the Internet-of-Things (IoT). The tasks are challenging in harsh wireless environments, such as indoor ones, especially when not equipped with dedicated tags (noncollaborative). problem detecting, localizing, noncollaborative within limited area has often been undertaken by exploiting network radio sensors, scanning zone through wideband signals to create image objects. This...

We derive efficient recursive formulas giving the exact distribution of largest eigenvalue for finite dimensional real Wishart matrices and Gaussian Orthogonal Ensemble (GOE). In comparing with limiting large random matrices, we also found that Tracy–Widom law can be approximated by a properly scaled shifted gamma distribution, great accuracy values common interest in statistical applications.

An important modulation technique for Internet of Things (IoT) is the one proposed by LoRa allianceTM. In this paper we analyze M-ary in time and frequency domains. First, provide signal description domain, show that a memoryless continuous phase modulation. The cross-correlation between transmitted waveforms determined, proving can be considered approximately an orthogonal only large M. Then, investigate spectral characteristics modulated random data, obtaining closed-form expression...

This paper evaluates the performance of wideband communication systems in presence narrowband interference (NBI). In particular, we derive closed-form bit-error probability expressions for spread-spectrum by approximating interferers as independent asynchronous tone interferers. The scenarios considered include additive white Gaussian noise channels, flat-fading and frequency-selective multipath fading channels. For develop a new analytical framework based on perturbation theory to analyze...

In this paper, we investigate the performance in terms of symbol error probability (SEP) multiple-input-multiple-output (MIMO) systems with high spectral efficiency. particular, consider coherent detection M-PSK signals a flat Rayleigh-fading environment. We focus on spectrally efficient MIMO where, after serial-to-parallel conversion, several substreams symbols are simultaneously transmitted by using an antenna array, thereby increasing The reception is based linear minimum...

In this paper, a novel methodology for designing structured generalized LDPC (G-LDPC) codes is presented. The proposed design results in quasi-cyclic G-LDPC which efficient encoding feasible through shift-register-based circuits. structure imposed on the bipartite graphs, together with choice of simple component codes, leads to class suitable fast iterative decoding. A pragmatic approach construction proposed. based substitution check nodes protograph low-density parity-check code stronger...

This paper investigates the performance of adaptive M-ary quadrature amplitude modulation (QAM) with antenna subset diversity. We consider a slow (SAM) technique that adapts constellation size to variation channel due, for example, shadowing. The proposed SAM is more practical than conventional fast (FAM) techniques require adaptation fast-fading variations. Our results show can provide substantial increase in throughput respect fixed schemes while maintaining an acceptable low bit-error...

System aspects of an anti-intruder multistatic radar based on impulse radio ultrawideband (UWB) technology are addressed. The investigated system is composed one transmitting node and at least three receiving nodes, positioned in the surveillance area with aim detecting locating a human intruder (target) that moves inside area. Such systems, referred to also as UWB sensor networks, must satisfy severe power constraints worldwide imposed by, for example, Federal Communications Commission...

With the increasing proliferation of different communication devices sharing same spectrum, it is critical to understand impact interference in heterogeneous wireless networks. In this paper, we put forth a mathematical model for coexistence networks composed both narrowband (NB) and ultrawideband (UWB) nodes, based on fundamental tools from stochastic geometry. Our considers that interferers are spatially scattered according Poisson field, operating asynchronously environment. We first...

In this paper, coded slotted ALOHA (CSA) is introduced as a powerful random access scheme to the MAC frame. CSA, burst generic user wishes transmit in frame first split into segments, and these segments are then encoded through local packet-oriented code prior transmission. On receiver side, iterative interference cancellation combined with decoding of performed recover from collisions. The new generalizes previously proposed irregular repetition (IRSA) technique, based on simple users'...

In this paper, we propose a wireless sensor network (WSN) designed for monitoring and risk management of landslides, where data collected by sensors are delivered through the to remote unit online analysis alerting. To ensure fast deployment, robustness in harsh environments, very long lifetime, nodes communication protocol have been specifically conceived, so that is self-organizing, fault tolerant, adaptive. The WSN has installed on landslide located Torgiovannetto (Italy) an experimental...

A multistatic radar based on ultra-wideband (UWB), also known as a UWB sensor network, has been shown to represent very promising solution localize an intruder moving within small surveillance area. In this paper, tracking algorithm low-complexity particle filtering is proposed, specifically tailored networks with one transmitter and several receivers. An expression calculate the weights first derived, combining observations from all The filter then modified solve problems caused by blind...

We present new exponential bounds for the Gaussian Q-function or, equivalently, of complementary error function er f c(.). More precisely, bound is in form sum functions that, limit, approaches exact value. Then, a quite accurate and simple approximated expression given by two reported. Moreover, some inverse c(.) are derived. The results applied to general problem evaluating average probability fading channels. An example application computation pairwise space-time codes also presented.

In this paper, we present a framework for evaluating the bit error probability of N/sub d/-branch diversity combining in presence non-ideal channel estimates. The estimator structure presented is based on maximum-likelihood (ML) estimate and arises naturally as sample mean p/ pilot symbols. requires only evaluation single integral involving moment generating function norm square channel-gain vector, applicable to channels with arbitrary distribution, including correlated fading. Our...