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arXiv 1010.1322cs.ITmath.IT
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多址信道平均差错指数的一个新上界

A New Upper Bound on the Average Error Exponent for Multiple-Access Channels

Ali Nazari, S. Sandeep Pradhan, Achilleas Anastasopoulos

摘要:

本文推导了两用户离散无记忆多址信道(MAC)的平均概率或误差的一个新的下界。这个界的结构非常类似于著名的球包装界Haroutunian。然而,由于显式地施加独立的用户的输入分布(条件的分时辅助变量)的结果在一个更紧密的球包装指数相比,Haroutunian的。此外,平均和最大错误概率之间的关系进行了研究。最后,利用已知的最大错误概率的球填充界,导出了平均错误概率的下界。

英文摘要:

A new lower bound for the average probability or error for a two-user discrete memoryless (DM) multiple-access channel (MAC) is derived. This bound has a structure very similar to the well-known sphere packing packing bound derived by Haroutunian. However, since explicitly imposes independence of the users' input distributions (conditioned on the time-sharing auxiliary variable) results in a tighter sphere-packing exponent in comparison to Haroutunian's. Also, the relationship between average and maximal error probabilities is studied. Finally, by using a known sphere packing bound on the maximal probability of error, a lower bound on the average error probability is derived.

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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