Capacity per Unit-Energy of Gaussian Random Many-Access Channels
Capacity per Unit-Energy of Gaussian Random Many-Access Channels
复制标题
高斯随机多址信道的单位能量容量
DOI:
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复制
发表时间:
2020
期刊:
影响因子:
--
通讯作者:
T. Koch
中科院分区:
文献类型:
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作者:
Jithin Ravi;T. Koch
We consider a Gaussian multiple-access channel with random user activity where the total number of users ℓ<inf>n</inf> and the average number of active users k<inf>n</inf> may be unbounded. For this channel, we characterize the maximum number of bits that can be transmitted reliably per unit-energy in terms of ℓ<inf>n</inf> and k<inf>n</inf>. We show that if k<inf>n</inf> log ℓ<inf>n</inf> is sublinear in n, then each user can achieve the single-user capacity per unit-energy. Conversely, if k<inf>n</inf> log ℓ<inf>n</inf> is superlinear in n, then the capacity per unit-energy is zero. We further demonstrate that orthogonal-access schemes, which are optimal when all users are active with probability one, can be strictly suboptimal.
DOI:
10.1109/isit.2019.8849764
发表时间:
2019
期刊:
IEEE Int. Symp. Inf. Theory (ISIT
影响因子:
--
作者:
Zadik, I.;Polyanskiy, Y.;Thrampoulidis, C.
通讯作者:
Thrampoulidis, C.
影响因子:
2.5
作者:
Kowshik, Suhas S.;Polyanskiy, Yury
通讯作者:
Polyanskiy, Yury