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In this paper, we consider a Partial Spectrum Reuse (PSR) scheme, namely “β-PSR”, to improve spectrum efficiency of two-tier heterogeneous cellular networks, in which each micro Base Station (BS) occupies a uniform portion β of the whole system spectrum randomly and independently. We analyze the optimal PSR factor β to minimize service outage probability, which is not in an explicit form. Then a closed-form...
We consider the problem of allocating transmit power in the downlink of a distributed wireless communication system. We account for the power used in both channel estimation and data transmission, with the objective of minimizing the overall transmitted power while satisfying specified Quality of Service (QoS) constraints to the mobile users. We consider both single user and multi-user power control...
We consider the joint optimization of relay station (RS) placement and RS sleep/active probability to enhance the energy efficiency of a one-dimensional cellular network. When the RSs are always active, conditions for optimal RS placement that minimizes transmission power are derived, based on which closed-form solution is obtained with path-loss exponent being two, and a simple numerical method for...
Precision analysis and optimization is very important when transforming a floating-point algorithm into fixed-point hardware implementations. The core analysis techniques are either based on dynamic analysis or static analysis. We believe in static error analysis, as it is the only technique that can guarantee the desired worst-case accuracy. In this paper we study various underlying arithmetic candidates...
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