干扰符号未对齐
Interference with Symbol-misalignment
摘要：
本文研究了无线网络中不同链路间的干扰对网络性能的影响。在活动链路之间没有刻意的协调和协作的情况下，在接收器的目标信号的符号与干扰信号的符号之间自然发生未对准。有趣的是，我们表明，干扰噪声实际上可以改善BER性能，与所有信号的符号对齐的情况相比。特别是，我们表明，符号错位可以降低“有效干扰功率”，改变干扰信号的分布，在某种程度上，导致较低的BER。为了确保符号不对准可以一致地实现，我们提出了两个简单的计划，引入时变符号偏移，以获得随机符号不对准的“平均”性能。值得注意的是，我们的计划不改变简单的接收机设计结构，只有发射机修改了一个小的方式。
英文摘要：
This paper studies the impact of interference asynchrony among different links in a wireless network. Without deliberate coordination and cooperation among the active links, there is a naturally occurring misalignment between the symbols of the targeted signal of a receiver and the symbols of the interfering signals. Interestingly, we show that the interference asynchrony can actually improve the BER performance, compared with the situation in which symbols of al signals ay aligned. In particular, we show that symbol misalignment can decrease the "effective interference power" and change the distribution of the interfering signals, in a way that results in lower BER. To ensure that symbol misalignment can be consistently attained, we propose two simple schemes that introduce time-varying symbol offsets to obtain an "average" performance of random symbol misalignment. Notably, our schemes do not change the simple receiver design structure; only the transmitters are modified in a minor way.
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