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| Content Provider | IET Digital Library |
|---|---|
| Author | Wang, Jie Hu, Xiao Guang Guan, Enyi Li, Tongyun Ding, Zhu Shun Yao, Yidong |
| Abstract | This study describes a novel feed-forward segmented digital automatic gain control (FSD-AGC) algorithm for long term evolution (LTE) digital radio-over-fibre (DRoF) systems. It experimentally demonstrates the algorithm using a DRoF platform based on real-time field programmable gate arrays. The FSD-AGC algorithm is able to update power status accurately with a short delay (about 100 samples) and adjust the gain precisely by only one step. It can make full use of analogue-to-digital converter quantisation bits width without oversaturation and maintain a stable peak-to-average ratio to reduce the overall cost and energy consumption of digital links and to minimise the deterioration of error vector magnitude (EVM) in LTE systems. Compared with conventional solutions, the proposed algorithm shows significant improvement in the dynamic range (a 20 dB improvement is demonstrated experimentally) of 4G-LTE radio frequency signals in a DRoF system. This is a major step forward for the future commercialisation of DRoF systems for 4G and 5G network deployments. Meanwhile, FSD-AGC can be applied in both LTE time division duplexing and frequency division duplexing signals. Experimental results have shown a mean EVM of the DRoF system below 4.5%, which is well below the 8% required by 3rd generation partnership project. |
| Starting Page | 2362 |
| Ending Page | 2369 |
| Page Count | 8 |
| ISSN | 17518628 |
| Volume Number | 11 |
| e-ISSN | 17518636 |
| Issue Number | Issue 15, Oct (2017) |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/iet-com/11/15 |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/10.1049/iet-com.2017.0128 |
| Journal | IET Communications |
| Publisher Date | 2017-08-11 |
| Access Restriction | Open |
| Rights Holder | © The Institution of Engineering and Technology |
| Subject Keyword | 3rd Generation Partnership Project LTE Requirement 4G Mobile Communication 4G Network Deployments 4G-LTE Radio Frequency Signals 5G Mobile Communication 5G Network Deployments Analogue-Digital Conversion Analogue-to-digital Converter Automatic Gain Control Control Application in Optical Communication Cost Reduction Digital Control Digital Link Energy Consumption Error Vector Magnitude EVM Feedforward Feedforward Segmented Digital Automatic Gain Control Algorithm Field Programmable Gate Array Free Space Optical Communication Free Space Optical Link Frequency Division Duplexing Uplink Signal FSD-AGC Algorithm Long Term Evolution Long-Term Evolution Digital Radio-over-fibre System LTE DRoF System LTE Time Division Duplexing Microwave Photonics Phase And Gain Control Quantisation Bits Width Radio Over Fibre Real-time Field Programmable Gate Array Stable Peak-to-average Ratio System Dynamic Range Telecommunication Control |
| Content Type | Text |
| Resource Type | Article |
| Subject | Electrical and Electronic Engineering Computer Science Applications |
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