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Performance Comparison with Different Antenna Properties in Time Reversal Ultra-Wideband Communications for Sensor System Applications

机译:传感器系统应用的时间反转超宽带通信中不同天线特性的性能比较

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摘要

The complexity reduction of receivers in ultrawideband (UWB) communication when time reversal (TR) technique is applied makes it suitable for low-cost and low-power sensor systems. Larger antenna dispersion can generally lead to a less stable phase center and will increase the interference in UWB communications based on pulse radio, whereas a higher antenna gain will result in higher channel gain and further larger channel capacity. To find out the trade-off between antenna gain and dispersion, we performed the channel measurements using different antennas in a dense multipath environment and established the distribution of channel capacities based on the measured channel responses. The results show that the capacity loss caused by antenna dispersion cannot be compensated by antenna gain with line-of-sight transmission to some extent, the effect of phase center on the communication system is negligible, and antennas with smaller time dispersion will have a better energy focusing property and anti-interference performance in TR systems.
机译:当应用时间反转(TR)技术时,超宽带(UWB)通信中接收机的复杂性降低,使其适合于低成本和低功率传感器系统。较大的天线色散通常会导致相位中心不稳定,并且会增加基于脉冲无线电的UWB通信中的干扰,而较高的天线增益将导致较高的信道增益和更大的信道容量。为了找出天线增益和色散之间的权衡,我们在密集的多径环境中使用不同的天线进行了信道测量,并根据测得的信道响应建立了信道容量的分布。结果表明,在视距传输中,天线色散引起的容量损失不能在一定程度上由天线增益补偿,相位中心对通信系统的影响可以忽略不计,时间色散较小的天线会有更好的效果。 TR系统的能量聚焦特性和抗干扰性能。

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