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Construction of New Delay-Tolerant Space-Time Codes

机译:新的时延容忍空时码的构造

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摘要

Perfect space-time codes (STC) are optimal codes in their original construction for multiple-input multiple-output (MIMO) systems. Based on cyclic division algebras (CDA), they are full-rate, full-diversity codes, have non-vanishing determinants (NVD) and hence achieve diversity-multiplexing tradeoff (DMT). In addition, these codes have led to optimal distributed space-time codes when applied in cooperative networks under the assumption of perfect synchronization between relays. However, they lose their diversity when delays are introduced and thus are not delay-tolerant. In this paper, using the cyclic division algebras of perfect codes, we construct new codes that maintain the same properties as perfect codes in the synchronous case. Moreover, these codes preserve their full-diversity in asynchronous transmission.
机译:完美的时空代码(STC)在其多输入多输出(MIMO)系统的原始结构中是最佳代码。基于循环划分代数(CDA),它们是全速率,全分集码,具有不消失的行列式(NVD),因此可以实现分集复用权衡(DMT)。另外,当在中继器之间的完美同步的假设下,当在协作网络中应用时,这些代码导致最优的分布式时空代码。然而,当引入延迟时,它们失去了多样性,因此不是延迟容忍的。在本文中,使用完美代码的循环除法代数,我们构造了新代码,它们在同步情况下保持与完美代码相同的属性。而且,这些代码在异步传输中保留了它们的全部多样性。

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