期刊
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
卷 70, 期 10, 页码 11111-11115出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TVT.2021.3111627
关键词
Massive MIMO; Indexes; Estimation; Power control; Numerical models; Fading channels; Decoding; Random access scheme; pilot collision; pilot allocation; massive MIMO systems
资金
- Zhejiang Provincial Natural Science Foundation of China [LQ21F010012]
- National Natural Science Foundation of China [62001419, 62131016, 61871348, 61872322]
The proposed novel grant-based pilot access scheme addresses pilot collision in crowded massive MIMO systems by dividing the cell into annuluses and utilizing a decision rule to determine weaker UEs. The scheme, E-SUCR-IPA, significantly increases the number of successful UEs while maintaining fairness among users compared to baseline approaches.
We propose a novel grant-based pilot access scheme to tackle the pilot collision in crowded massive multiple-input multiple-output (MIMO) systems. The proposed scheme divides the cell into several annuluses. Then, weaker user equipments (UEs) in each annulus, judged by a decision rule in a strongest-user collision resolution (SUCRe) scheme, send their reselected or allocated idle pilots to a base station (BS). We call this scheme enhanced SUCRe combined idle pilots access (E-SUCR-IPA). We analyze the number of successful UEs and the successful access probability of one UE with respect to its distance to the BS for the E-SUCR-IPA scheme. Numerical results show that the E-SUCR-IPA scheme significantly increases the number of successful UEs while ensuring fairness among UEs compared to baselines.
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