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DOWNLINK OPTIMAL POWER ALLOCATION IN OVSF-WCDMA COMMUNICATIONS

机译:OVSF-WCDMA通信中的下行链路最佳功率分配

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In this paper the issue of optimal power allocation on the downlink channel in an orthogonal variable spreading factor wideband code division multiple access (OVSF-WCDMA) system for a group of mobiles coordinated by a base station is addressed. Quality of service is measured in terms of bit error rate (BER). Optimal allocation of power to mobiles is sought subject to a constraint that the per-cell total power budget has been determined by the network controller. Power allocation can be formulated as a nonlinear programming problem (NLP) and we are able to prove that the objective function of this NLP is pseudo-concave on its feasible set of solutions in an AWGN/a Rayleigh fading/ a Rayleigh fading with diversity channel. Frank-Wolfe Algorithm [1] may be employed to find the global optimum. Or since the objective function is separable, existing techniques such as the A-method [2] in separable programming can be called to transform the original NLP into a linear programming problem and the search for an optimum has polynomial-time complexity.
机译:在本文中,针对基站协调的一组移动台,在正交可变扩频因子宽带码分多址(OVSF-WCDMA)系统中,解决了下行链路信道上的最佳功率分配问题。服务质量是根据误码率(BER)来衡量的。寻求对移动台的最佳功率分配是受网络控制器已确定每小区总功率预算的约束。可以将功率分配公式化为非线性规划问题(NLP),并且我们能够证明该NLP的目标函数在AWGN / A Rayleigh衰落/ Rayleigh衰落(具有分集信道)中的可行解集上是伪凹的。 。可以采用Frank-Wolfe算法[1]来找到全局最优值。或者,由于目标函数是可分离的,因此可以调用诸如可分离编程中的A方法[2]之类的现有技术,将原始NLP转换为线性规划问题,并且寻求最优值具有多项式时间复杂度。

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