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arXiv 1706.03342cs.ITmath.IT
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Nrx2信道上强迫中断概率的显式下界

Explicit Lower Bounds on the Outage Probability of Integer Forcing over Nrx2 Channels

Elad Domanovitz, Uri Erez

摘要:

本文研究了在复合多输入多输出信道中整数强迫均衡的性能。作为容量间隙的函数的所得中断概率的上界先前已经被导出,假设在传输之前应用从循环酉系综提取的随机预编码矩阵。在目前的工作中,一个简单而明确的下限上的最坏情况下的中断概率推导出的情况下,系统具有两个发射天线和两个或更多的接收天线,利用属性的雅可比系综。推导出的下界也扩展到随机空时预编码,并可能作为一个有用的基准评估各种代数空时预编码方案的相对优点。我们进一步表明,下界可以适应的情况下,一个$1 \times N_t$系统。作为一个应用程序,我们推导出封闭形式的瑞利衰落多址接入信道,所有终端都配备了一个单一的天线的速率容量的界限。最后,我们证明了与分布式空时编码相结合的整数强制均衡能够接近这些界限。

英文摘要:

The performance of integer-forcing equalization for communication over the compound multiple-input multipleoutput channel is investigated. An upper bound on the resulting outage probability as a function of the gap to capacity has been derived previously, assuming a random precoding matrix drawn from the circular unitary ensemble is applied prior to transmission. In the present work a simple and explicit lower bound on the worst-case outage probability is derived for the case of a system with two transmit antennas and two or more receive antennas, leveraging the properties of the Jacobi ensemble. The derived lower bound is also extended to random space-time precoding, and may serve as a useful benchmark for assessing the relative merits of various algebraic space-time precoding schemes. We further show that the lower bound may be adapted to the case of a $1 \times N_t$ system. As an application of this, we derive closed-form bounds for the symmetric-rate capacity of the Rayleigh fading multiple-access channel where all terminals are equipped with a single antenna. Lastly, we demonstrate that the integer-forcing equalization coupled with distributed space-time coding is able to approach these bounds.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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