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引用次数: 11
摘要
本文研究了时延跳变传输参考超宽带(UWB)多址通信系统中自相关接收机的输出。在线性多输入多输出(MIMO)通道旁边,该接收器生成由原始源之间的交叉积组成的二次通道。因此,接收到的信号是多用户(MU) MIMO Volterra信道的输出,可以确保无内存。我们提出了一种新的盲算法来执行源分离和它的半盲版本。在证明了其有效性之后,我们讨论了具有二值输入的线性二次通道的唯一性问题
Semi-Blind Source Separation for Memoryless Volterra Channels in UWB and its Uniqueness
We study in this article the output of an autocorrelation receiver for a delay-hopped transmitted-reference ultra-wideband (UWB) communications systems with multiple access. Next to a linear multi-input multi-output (MIMO) channel, this receiver generates quadratic channels consisting of cross-product between original sources. Hence the received signal is the output of a multi-user (MU) MIMO Volterra channel, which can be ensured to be memoryless. We propose a novel blind algorithm to perform source separation and a semi-blind version of it. After demonstrating its effectiveness, we discuss the uniqueness problem for linear-quadratic channels with binary input