期刊
2017 IEEE INTERNATIONAL SYMPOSIUM ON INFORMATION THEORY (ISIT)
卷 -, 期 -, 页码 1092-1096出版社
IEEE
关键词
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资金
- European Research Council under the European Union [670896]
- European Research Council (ERC) [670896] Funding Source: European Research Council (ERC)
This work(1) analyzes the Generalized Degrees-of-Freedom (GDoF) of the 2-User Multiple-Input Single-Output (MISO) Broadcast Channel (BC) in the so-called Distributed CSIT regime, with application to decentralized wireless networks. This regime differs from the classical limited CSIT one in that the CSIT is not just noisy but also imperfectly shared across the transmitters (TXs). Hence, each TX precodes data on the basis of local CSIT and statistical quality information at other TXs. We derive the GDoF result and obtain the surprising outcome that by specific accounting of the pathloss information, it becomes possible for the decentralized precoded network to reach the same performance as a genie-aided centralized network where the central node has obtained the estimates of both TXs. The key idea allowing this surprising robustness is to let the TXs have asymmetrical roles such that the most informed TX is able to balance the lower CSIT quality at the other TX.
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