To resolve the pilot contamination problem in the massive multiple-input multiple-output (MIMO) systems, a pilot random access scheme which combines the strongest user collision resolution with timing advance information (SUCR-TA), is proposed. This scheme takes the propagation delay into account, and selects an appropriate TA information for each active pilot to reduce the number of contenders who will perform the SUCR algorithm. We also analyze the system throughput of the SUCRTA scheme, i.e. the number of MTC devices that can be allocated pilots successfully. Simulation results demonstrate that, compared with the SUCR algorithm, SUCR-TA scheme can significantly improve the system throughput.
A Joint SUCR Protocol and TA Information Pilot Random Access Scheme
01.09.2017
278415 byte
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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