MIMO Cognitive Radio Considering Interference

Mamiya, Takuro; Fujimoto, Mitoshi

doi:10.1109/iwem.2018.8536696

Cited by 1 publication

(1 citation statement)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For example, CR will be a brand-new field for the tactile Internet, and it is expected to improve the overall quality of the network [5]. In addition, CR has certain guiding significance for the data decision of internet of multimedia things (IoMT) [6].The multiple input multiple output (MIMO) approach is used to ensure the coexistence of SUs and PUs in the space domain, and to avoid adverse interference to the primary user links [7,8]. Among the popular technologies of the fifth generation (5G) mobile communication, the sparse code multiple access (SCMA) technology can provide strong support for slot sharing [9,10].…”

Section: Introductionmentioning

confidence: 99%

Energy Efficiency and User Capacity Optimization of Cognitive MIMO Systems Via the SCMA-Based Nonorthogonal Time Slot Allocation

Zhang

et al. 2020

Symmetry

View full text Add to dashboard Cite

This paper investigates the energy-efficient communications and user capacity in the cognitive multiple input multiple output (MIMO) symmetric system of underlay mode. The advantage of the improved energy efficiency provided by the orthogonal slot allocation for time division multiple access (TDMA) has a side effect of restricting the number of users accessing the system. To tackle the above problem, this paper proposes a nonorthogonal time resource allocation method with sparse code multiple access (SCMA), which allows one to convert the orthogonal slot units of TDMA into non-orthogonal shared slot units for multiple secondary users (SUs). The method of adding virtual users is adopted, wherein each SU is treated as multiple SUs who occupy a shared unit, to facilitate the packet access. Finally, the greedy algorithm is applied to optimize the time slot allocation of unoccupied shared slot units. The simulation results show that SCMA-based nonorthogonal slot allocation can reduce not only the energy consumption by nearly 40%, but also the average power interference from SUs to primary users by nearly 2 dB if their number is relatively high. Moreover, in the case of satisfying the rate requirement of the users, the system user capacity increased by more than 50%.

show abstract

Section: Introductionmentioning

confidence: 99%

Energy Efficiency and User Capacity Optimization of Cognitive MIMO Systems Via the SCMA-Based Nonorthogonal Time Slot Allocation

Zhang

et al. 2020

Symmetry

View full text Add to dashboard Cite

show abstract

MIMO Cognitive Radio Considering Interference

Cited by 1 publication

References 2 publications

Energy Efficiency and User Capacity Optimization of Cognitive MIMO Systems Via the SCMA-Based Nonorthogonal Time Slot Allocation

Energy Efficiency and User Capacity Optimization of Cognitive MIMO Systems Via the SCMA-Based Nonorthogonal Time Slot Allocation

Contact Info

Product

Resources

About