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A practical power allocation method for multi-user and multi-carrier networks

机译：一种用于多用户和多载波网络的实用功率分配方法

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摘要

In the majority of studies on wireless networks, it is assumed that the receiver perfectly knows the channel. Since this is not the case for real life applications, the channel must be estimated in those systems. Thus, current cellular wireless communication systems are designed to perform coherent detection, and channel estimator is one of the most important part of a receiver. The channel estimation error must be minimized, because the error to be made during the channel estimation phase significantly affects the performance of the data detector. This can be made possible by allocating required amount of power to the pilot symbols to estimate channel with minimum error as possible as. Hence, this study examines how to allocate the power between pilot and data symbols to minimize the error of the data detector. The long term evolution provides an opportunity to change the radiation emitted in the pilot sub-carriers according to the data sub-carriers. Since this opportunity is expected to be the case for next generation cellular wireless networks, in this study, the effect of channel estimation error on data detection performance of a multi-user and multi-carrier cellular wireless communication system is investigated. The proposed solution is a practical one to approximate to the optimum solution of the resulting optimization problem without solving it. It is seen that the results obtained in computer simulations are very close to the optimum ones.
机译：在有关无线网络的大多数研究中，都假设接收者完全了解信道。由于对于实际应用而言并非如此，因此必须在这些系统中估算信道。因此，当前的蜂窝无线通信系统被设计为执行相干检测，并且信道估计器是接收机最重要的部分之一。信道估计误差必须最小化，因为在信道估计阶段要进行的误差会极大地影响数据检测器的性能。通过将所需的功率分配给导频符号以尽可能最小地估计信道来使这成为可能。因此，本研究探讨了如何在导频和数据符号之间分配功率以最小化数据检测器的误差。长期演进为根据数据子载波改变在导频子载波中发射的辐射提供了机会。由于预期此机会将是下一代蜂窝无线网络的情况，因此在本研究中，研究了信道估计误差对多用户和多载波蜂窝无线通信系统的数据检测性能的影响。所提出的解决方案是一种实用的解决方案，可以近似地解决所产生的优化问题的最优解决方案而无需解决该问题。可以看出，在计算机仿真中获得的结果非常接近于最佳结果。

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