论文标题
非白色干扰通道的多载波光谱形状：应用于L波段航空通道
Multicarrier Spectral Shaping for Non-White Interference Channels: Application to L-band Aviation Channels
论文作者
论文摘要
在本文中，我们研究了一种算法，以使用多载波通信（即，正交频施加多重载体（OFDM）和FilterBank多载波（FBMC），使用多载波通信（即，在光谱非白色通道）中获得添加剂白色高斯噪声（AWGN）。非白色通道可以来自非白噪声，也可以是更常见的干扰。我们的算法使用一种简单的优化方法来查找可用的子载波，并将不同的功率水平分配给子载波，以达到等效的AWGN通道位误差比（BER）。经历很高干扰的子载体被指定为无效子载波。在描述了分析之后，我们显示了两个非白色干扰信号示例的结果：高斯脉冲距离测量设备（DME）脉冲和一个经典的矩形脉冲脉冲干扰信号。 DME示例与当前提出的航空通信系统有关，其中新的多载波技术（例如L波段数字航空通信系统（LDAC））被设计为L波段中高功率DME频道之间的嵌入方法。我们的结果表明，使用这种自适应技术如何提高性能和光谱效率，而固定的带宽方案（例如LDAC）可能会遭受重大的性能降解。这些结果表明，该想法对航空或其他非白色渠道的未来自适应和认知无线电应用的实用性。
In this paper, we investigate an algorithm to attain additive white Gaussian noise (AWGN) performance in spectrally non-white channels, using multicarrier communications, i.e., orthogonal frequency division multiplexing (OFDM) and filterbank multicarrier (FBMC). The non-white channel can be from non-white noise, or more commonly, interference. Our algorithm uses a simple optimization method to find usable subcarriers and assigns different power levels to the subcarriers to attain the equivalent AWGN channel bit error ratio (BER). Subcarriers that experience very high interference are assigned as null subcarriers. After describing our analysis, we show results for two non-white interference signal examples: the Gaussian pulse shaped distance measuring equipment (DME) pulses, and a classical rectangular-pulse interference signal. The DME example is pertinent for currently proposed aviation communication systems, where new multicarrier techniques, e.g., the L-band digital aviation communication systems (LDACS) have been designed as an inlay approach between the high-power DME channels in the L-band. Our results show how using this adaptive technique can improve performance and spectral efficiency, whereas fixed bandwidth schemes such as LDACS could suffer significant performance degradation. These results show the utility of this idea for future adaptive and cognitive radio applications for aviation or other non-white channels.
