Performance of Optimum Combining in a Poisson Field of Interferers and Rayleigh Fading Channels

This paper studies the performance of antenna array processing in distributed multiple access networks without power control. The interference is represented as a Poisson point process. Desired and interfering signals are subject to both path-loss fading (with an exponent greater than 2) and to independent Rayleigh fading. Using these assumptions, we derive the exact closed form expression for the cumulative distribution function of the output signal-to-interference-plus-noise ratio when optimum combining is applied. This results in a pertinent measure of the network performance in terms of the outage probability, which in turn provides insights into the network capacity gain that could be achieved with antenna array processing. We present and discuss examples of applications, as well as some numerical results.Comment: Submitted to IEEE Trans. on Wireless Communication (Jan. 2009

Electromagnetic Background Generated by Mobile (Cellular) Communications

A practical technique for the worst-case evaluation of levels of electromagnetic background generated by cellular communication systems is proposed. It is based on the analysis of the average electromagnetic loading on area created by base and mobile subscriber's stations, and on the prediction of the area traffic capacity created by wireless information services supported by cellular communications. Such evaluations are very important for supporting the intersystem EMC, electromagnetic safety and ecological compatibility of 4G/5G/6G system

ВЕРИФИКАЦИЯ МОДЕЛИ НАИХУДШЕГО СЛУЧАЯ ДЛЯ ОЦЕНКИ СРЕДНЕЙ ИНТЕНСИВНОСТИ ЭЛЕКТРОМАГНИТНОГО ФОНА, СОЗДАВАЕМОГО БАЗОВЫМИ СТАНЦИЯМИ СОТОВОЙ СВЯЗИ

Results of comparison estimations of average intensity of the electromagnetic background created by base stations of cellular communications, performed with use of the technique offered by the author, with the published results of measurements of levels of an electromagnetic background in the various countries, are presented. This data confirms of adequacy of the offered technique and its practical importance for an estimation of electromagnetic ecology of different areas and electromagnetic safety of the population.Приведены результаты сравнения оценок средней интенсивности электромагнитного фона, создаваемого базовыми станциями сотовой связи, с использованием предложенной автором методики, с опубликованными результатами измерений уровней электромагнитного фона в различных странах. Эти данные подтверждают адекватность предложенной методики и ее практическую значимость для оценки электромагнитной экологии территорий и электромагнитной безопасности населения

Route Availability model for Inter-working multi-hop wireless networks

The paper emphasizes that route availability is important

A Model for Interference on Links in Inter-working Multi-hop Wireless Networks

Inter-node interference is an important performance metric in interworking multi-hop wireless networks. Such interference results from simultaneous transmissions by the nodes in these networks. Although several interference models exist in literature, these models are for specific wireless networks and MAC protocols. Due to the heterogeneity of link-level technologies in interworking multi-hop wireless networks, it is desirable to have generic models to evaluate interference on links in inter-working multi-hop wireless networks. This paper presents a generic model to provide information about the interference level on a link irrespective of the MAC protocol in use. The model determines the probability of interference and uses the negative second moment of the distance between a receiver-node and interfering-nodes to estimate the interference power on a link. Numerical results of the performance of the model are presented

Generalized Interference Alignment—Part II: Application to Wireless Secrecy

In contrast to its wired counterpart, wireless communication is highly susceptible to eavesdropping due to the broadcast nature of the wireless propagation medium. Recent works have proposed the use of interference to reduce eavesdropping capabilities in wireless wiretap networks. However, the concurrent effect of interference on both eavesdropping receivers (ERs) and legitimate receivers has not been thoroughly investigated, and careful engineering of the network interference is required to harness the full potential of interference for wireless secrecy. This two-part article addresses this issue by proposing a generalized interference alignment (GIA) technique, which jointly designs the transceivers at the legitimate partners to impede the ERs without interfering with LRs. In Part I, we have established a theoretical framework for the GIA technique. In Part II, we will first propose an efficient GIA algorithm that is applicable to large-scale networks and then evaluate the performance of this algorithm in stochastic wireless wiretap network via both analysis and simulation. These results reveal insights into when and how GIA contributes to wireless secrecy