Power efficient 60 GHz wireless communication networks with relays

Linhao Dong, Sumei Sun, Xu Zhu, Yeow-Khiang Chia
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引用次数: 5

Abstract

In this paper, we study the power consumption in relay networks of the 60 GHz wireless communication based on amplify-and-forward (AF) and decode-and-forward (DF) relaying strategies. We propose a total power consumption model including drive power, decoding power, and power consumption of power amplifier (PA). This model is formulated as a function of drive power, which gives an easy access to the system level optimisation. The optimal drive power that minimises the total power consumption while satisfying the performance requirement can be found by numerical searching method. The impact of relay's locations on the total power consumption is also investigated. We show that, with the same performance requirement, in the small source-relay separation case AF consumes less power than DF, while with larger separation, AF consumes significantly more power than DF. This is different from the common intuition that DF is always more power consuming than AF due to the extra decoding power consumption at relay, which is due to the fact that the large source-relay separation limits the effective destination signal-to-noise ratio (SNR) in AF, leading to more substantial decoding power consumption in the many more decoding iterations than DF.
功率高效的60 GHz无线通信网络与继电器
本文研究了基于放大转发(AF)和解码转发(DF)中继策略的60 GHz无线通信中继网络的功耗。我们提出一个总功耗模型,包括驱动功率、解码功率和功率放大器(PA)的功耗。该模型是制定为驱动功率的函数,这给了一个容易访问的系统级优化。通过数值搜索的方法,找到总功耗最小,同时满足性能要求的最优驱动功率。研究了继电器位置对总功耗的影响。我们表明,在相同的性能要求下,在较小的源中继分离情况下,AF消耗的功率小于DF,而在较大的分离情况下,AF消耗的功率明显大于DF。这与常见的直觉不同,DF总是比AF消耗更多的功率,因为中继上额外的解码功耗,这是由于大的源-中继分离限制了AF中有效的目标信噪比(SNR),导致在更多的解码迭代中比DF消耗更大的解码功耗。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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