Fast-Settling Two-Stage Automatic Gain Control for Multi-Service Fibre-Wireless Fronthaul Systems

Wen, Li; Chen, Aixin; Wang, Xuefeng; Li, Tongyun; Penty, R.V.; Liu, Xiaobin

doi:10.1109/access.2020.3014974

Cited by 4 publications

(3 citation statements)

References 22 publications

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“…Figure 3 shows the two-stage data compression processing chain aiming to reduce the data rate of the raw digital IF signal [9]. At the first stage, a digital automatic gain control (DAGC) module with fast settling time is introduced [20]. The module automatically adjusts the amplification gain to maintain signal power within a certain range.…”

Section: Drof Data Compression Chainmentioning

confidence: 99%

Towards efficient and reconfigurable next-generation optical fronthaul networks for massive MIMO

Xia

et al. 2022

Metro and Data Center Optical Networks and Short-Reach Links V

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This paper summaries our recent research on digital radio over fibre (DRoF) based optical fronthaul links and experimentally demonstrates a novel last-mile wireless coverage system incorporating data compression, time-division multiplexing (TDM) based packetization, and wavelength division multiplexing (WDM) based optical transmission. Compression reduces the fronthaul data rate required per service by a factor of 3 when compared with the common public radio interface (CPRI) standard, enabling efficient radio resource distribution over optical fibre infrastructure. The new packetization mechanism and WDM architecture enable fully reconfigurable resource allocation in a fronthaul network for 20MHz-bandwidth RF inputs with 64x64 MIMO carried over an aggregated compressed optical data rate of 32Gbps using 4 wavelengths. The experimental results show over 40dB RF dynamic range with < 8% error value magnitude (EVM) for the 64 quadrature amplitude modulation (64-QAM) input signals across all the WDM channels while the lowest EVM is less than 2%. Meanwhile, this field-programmable gate array (FPGA) based DRoF system allows flexible, software definable and easy-scalable dynamic antenna resource allocation.

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Section: Drof Data Compression Chainmentioning

confidence: 99%

Towards efficient and reconfigurable next-generation optical fronthaul networks for massive MIMO

Xia

et al. 2022

Metro and Data Center Optical Networks and Short-Reach Links V

Self Cite

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“…Automatic gain control (AGC) is a closed loop system which provides constant output signal despite the variation of the input signal amplitude and frequency 2 . AGC consists of a variable gain amplifier (VGA) and gain control mechanism.…”

Section: Introductionmentioning

confidence: 99%

“…Automatic gain control (AGC) is a closed loop system which provides constant output signal despite the variation of the input signal amplitude and frequency. 2 AGC consists of a variable gain amplifier (VGA) and gain control mechanism. The gain of the VGA is adjusted depending on the output signal strength which changes with input signal strength.…”

Section: Introductionmentioning

confidence: 99%

Design of an automatic gain control loop for high speed communication

Chowdhury

Hasan

2022

Circuit Theory & Apps

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This paper presents the design of an automatic gain control (AGC) loop for high-speed communication systems, which can be used in wired, wireless, or optical receiver. The design is performed in 130 nm SiGe BiCMOS technology. A Gilbert cell-based variable gain amplifier is designed, which shows approximately linear gain control with respect to the gain control voltage. The variable gain amplifier is followed by two fixed gain cascode amplifiers. Then, a full wave rectifier-based peak detector is designed and analyzed. To reduce the peak detector error, a compensation technique is applied. Finally, an operational amplifier is designed, which is used as voltage adder and comparator.The designed AGC loop is simulated with sinusoidal and pseudorandom binary sequence (prbs) input signal with high frequency signal of 1 to 30 GHz.The simulation results of the AGC loop show that a gain tuning range of 47 dB (À7 to 40 dB) is obtained in this design. It is also seen that the reference signal can be varied from 50 to 200 mV. This AGC works in the input voltage signal range between 3 mV peak and 230 mV peak, and the power dissipation of is 79 mW. K E Y W O R D Sautomatic gain control, fixed gain amplifier, high efficiency power amplifier, peak detector, variable gain amplifier

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Deep Learning Based Modulation Classification in Radio Access Network

Guo,

Peng,

et al. 2023

2023 IEEE Globecom Workshops (GC Wkshps)

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The growing demand for traffic shaping and manipulation for efficient last-mile coverage has driven extensive research using emerging artificial intelligence to overcome the capacity hurdle in next-generation wireless systems. In the radio access network (RAN), modulation format can be critical information to determine the channel condition and implement resource allocation and data compression so as to improve the quality of service and spectral efficiency of data transmission. This paper proposes a novel deep learning-based automatic modulation classification algorithm that trains neural networks as classifiers to determine the modulation format of signals transmitted in the RAN. To conquer the problem of limited training data with the received dataset, the proposed algorithm exploits a signal generation method that generates massive simulated data for training instead of relying on the received signal stream. To eliminate the issue of inconsistent data distribution between the training and inferring stages, data augmentation is applied to increase the diversity of training data and enrich the training dataset. The experiment results demonstrate that the proposed algorithm accurately identifies the modulation formats of signals received from the RAN.

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Fast-Settling Two-Stage Automatic Gain Control for Multi-Service Fibre-Wireless Fronthaul Systems

Cited by 4 publications

References 22 publications

Towards efficient and reconfigurable next-generation optical fronthaul networks for massive MIMO

Towards efficient and reconfigurable next-generation optical fronthaul networks for massive MIMO

Design of an automatic gain control loop for high speed communication

Deep Learning Based Modulation Classification in Radio Access Network

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