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Co-existence and interference investigation between LTE-TDD and LTE-FDD under the frequency band between 2500 to 2690 MHz for Malaysia

Ahmed Adam, Labeeb Mohammed (2016) Co-existence and interference investigation between LTE-TDD and LTE-FDD under the frequency band between 2500 to 2690 MHz for Malaysia. Masters thesis, Universiti Tun Hussein Onn Malaysia.

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The LTE-co-existence between FDD and TDD systems cannot be done, if the two systems are using an adjacent frequency band, and propagating in the same geographical area, because of a mutual interference that will initiate between the two systems. Consequently, the reason why the co-existence has been made for will not be achieved. The study is implemented based on realistic parameters in order to help the network designer to make a decision about the best frequency allocation and network deployments in order to achieve higher performance under the lowest possible cost. Throughout this research, the co-existence is evaluated under wide range of separation distances between the FDD-eNodeBs and the TDD-eNodeBs, by applying wide range of ACIR offset for each considered distance between the eNodeBs of the two systems, the two power control parameters are performed, and two UEs distribution scenarios are considered as well. The findings show that, the separation distance is a significant factor to mitigate the interference ratio, and to minimize the required ACIR offset, for the TLR to be acceptable and to recover the interference effect. In addition, the CeDS, MeDS, and EeDS respectively, the required ACIR offset are 130 dB, 60 dB, and 50 dB for the TDD uplink TLR to drop less than 5%. Meanwhile, 140 dB, 70 dB, and 65 dB of the ACIR are required for the uplink of the FDD, system which are considered quite beyond the acceptable ratio. On the other hand, the downlink of the FDD/TDD experiences high interference only in the case of CeDS, whereas, for TDD, 80 dB of the ACIR is required, meanwhile, 60 dB for the FDD case. The other interference scenario cases such as downlink of TDD/FDD considering FDD/TDD interference are acceptable.

Item Type: Thesis (Masters)
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK6540-6571 Radio
Depositing User: Mr. Mohammad Shaifulrip Ithnin
Date Deposited: 23 Jan 2017 01:47
Last Modified: 23 Jan 2017 01:47
URI: http://eprints.uthm.edu.my/id/eprint/8771
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