منابع مشابه
Coded Pilot Access: A Random Access Solution for Massive MIMO Systems
We present a novel access protocol for crowd scenarios in massive MIMO (Multiple-input multiple-output) systems. Crowd scenarios are characterized by a large number of users with intermittent access behavior, whereby orthogonal scheduling is infeasible. In such scenarios, random access is a natural choice. The proposed access protocol relies on two essential properties of a massive MIMO system,...
متن کاملIntroduction to Massive MIMO and Random Access Protocol for Pilot Allocation
1Student Mtech, Department of Electronics and Communication Engineering, IGDTUW, Delhi, India 2Assistant Professor, Department of Electronics and Communication Engineering, IGDTUW, Delhi, India ---------------------------------------------------------------------***--------------------------------------------------------------------Abstract – This paper presents an overview of Massive MIMO (Mul...
متن کاملRate-storage regions for Massive Random Access
This paper introduces a new source coding paradigm called Sequential Massive Random Access (SMRA). In SMRA, a set of correlated sources is encoded once for all and stored on a server, and clients want to successively access to only a subset of the sources. Since the number of simultaneous clients can be huge, the server is only allowed to extract a bitstream from the stored data: no re-encoding...
متن کاملOptical CDMA Random Access Protocols
The link layer of an optical directdetection code-division-multiple access packet network is considered. Three different protocols are proposed. Two of them need pretransmission coordination, whereas the third one does not. Both system throughput and average packet delay are derived and investigated for two different receiver models, namely the correlation and chip-level receivers. Both multip...
متن کاملTiming Advance Estimation and Beamforming of Random Access Response in Crowded TDD Massive MIMO Systems
Timing advance (TA) estimation at the base station (BS) and reliable decoding of random access response (RAR) at the users are the most important steps in the initial random access (RA) procedure. However, due to the limited availability of physical resources dedicated for RA, successful completion of RA requests would become increasingly difficult in high user density scenarios, due to content...
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ژورنال
عنوان ژورنال: IEEE Communications Magazine
سال: 2017
ISSN: 0163-6804,1558-1896
DOI: 10.1109/mcom.2017.1600477cm