Impact of IQI on Sum Rate of mmWave Massive MU-MIMO Systems with Hybrid Beamforming
Impact of IQI on Sum Rate of mmWave Massive MU-MIMO Systems with Hybrid Beamforming
- New search for: Zhang, Nana
- New search for: Yin, Huarui
- New search for: Wang, Weidong
- New search for: Zhang, Nana
- New search for: Yin, Huarui
- New search for: Wang, Weidong
In this paper, we consider a single-cell hybrid millimeter wave (mmWave) massive multi-user multipleinput multiple-output (MU-MIMO) system with in- phase and quadrature-phase imbalance (IQI) at the radio frequency chains. We investigate the impact of IQI on the achievable sum rate of the system. Results show that IQI limits the sum rate to a finite ceiling as the number of antennas at the base station or transmit power goes to infinity, and its impact on performance of the hybrid beamforming system is more obvious than that of the fully digital beamforming system. With the finite resolution phase shifters, the impact of the finite resolution is less severe than that of IQI. Moreover, the sum rate decreases with the number of users in a small value region, and the impact of IQI decreases as well.
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Impact of IQI on Sum Rate of mmWave Massive MU-MIMO Systems with Hybrid Beamforming
2019-04-01
224392 byte
Conference paper
Electronic Resource
English