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In this paper, the ergodic capacity (EC) of a land mobile satellite (LMS) system using dual-polarized antennas for transmit diversity is analysed. Three key channel parameters, i.e. cross-polarization discrimination (XPD), transmit and receive correlation coefficients and Ricean K-factor are included in channel modeling and their effects on the EC are investigated. In particular, we derive the estimated...
Quality of service (QoS) guarantees play a significant role in next-generation wireless networks and the concept of effective capacity is proposed to characterize the maximum arrival rate that a time-varying fading channel can support under a delay-QoS constraint. However, the probability density function (PDF)-based analysis of effective capacity over generalized fading channels suffers from mathematical...
This paper provides a glimpse of ways to improve the transmission capacity of wireless networks by means of multi-domain collaboration, which is supposed to be a potential future framework of wireless communication under study supported by the national basic research program in China (973). It is shown that, for the cases of point-to-point, point-to-multipoint, multipoint-to-point and multipoint-to-multipoint,...
This paper considers a joint subcarrier and power allocation in an orthogonal frequency division multiple access (OFDMA) cellular system with base station (BS) cooperation. The problem is formulated as an average utility maximization subject to the per-antenna power constraint. Existing algorithms to solve similar problem in a single-sell system are shown not so efficient in the cooperative multi-cell...
The fundamental limit of wireless communication is the tradeoff between efficiency and reliability. In order to improve system efficiency and reliability simultaneously, we have to create and explore new degrees of freedom. Multi-domain collaboration can be regarded as a systematic approach to solve this issue. From a broader and higher perspective, multi-domain is utilized to create the degrees of...
In this paper, we focus on resource allocation in OFDMA based cooperative cellular networks with multiple sources, multiple relays and a single destination. Four typical relay schemes are discussed, namely, Amplify-and-Forward (AF) and Decode-and-Forward (DF) both with or without diversity. We formulate two general optimization problems incorporating single-carrier allocation and multi-carrier allocation...
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