Deep Learning-Based Channel Estimation for mmWave Massive MIMO Systems in Mixed-ADC Architecture

Sensors

Ting Liu¹  Weiqiang Tan²  Rui Zhang²  Wenliang Nie³  Xianda Wu⁴ 

[1] School of Artificial Intelligence, Nanjing University of Information Science and Technology, Nanjing 210044, China;School of Computer Science and Cyber Engineering, Guangzhou University, Guangzhou 510006, China;School of Electronic and Information Engineering, Chongqing Three Gorges University, Chongqing 404000, China;School of Electronics and Information Engineering, South China Normal University, Foshan 528000, China;

关键词: millimeter-wave;    massive MIMO;    channel estimation;    deep learning;    mixed resolution ADC;    approximate message passing;   

DOI  :  10.3390/s22103938

来源: DOAJ

【 摘 要 】

Millimeter-wave (mmWave) massive multiple-input multiple-output (MIMO) systems can significantly reduce the number of radio frequency (RF) chains by using lens antenna arrays, because it is usually the case that the number of RF chains is often much smaller than the number of antennas, so channel estimation becomes very challenging in practical wireless communication. In this paper, we investigated channel estimation for mmWave massive MIMO system with lens antenna array, in which we use a mixed (low/high) resolution analog-to-digital converter (ADC) architecture to trade-off the power consumption and performance of the system. Specifically, most antennas are equipped with low-resolution ADC and the rest of the antennas use high-resolution ADC. By utilizing the sparsity of the mmWave channel, the beamspace channel estimation can be expressed as a sparse signal recovery problem, and the channel can be recovered by the algorithm based on compressed sensing. We compare the traditional channel estimation scheme with the deep learning channel-estimation scheme, which has a better advantage, such as that the estimation scheme based on deep neural network is significantly better than the traditional channel-estimation algorithm.

【 授权许可】

Unknown