Minimizing transmit power for cooperative multicell system with massive MIMO

Kang, Jinkyu; Kang, Joonhyuk; Lee, Namjeong; Lee, Byung Moo; Bang, Jongho

doi:10.1109/ccnc.2013.6488480

Cited by 8 publications

(2 citation statements)

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“…This can be justified by the fact that when the channel state information is imperfect, there is a gain in the required power consumption for per-user rate larger than a certain treshold as the number of users increases [37]. Also, a comparison of the results in both figures shows that the higher the number of base station antennas deployed, the lower the required power consumption, which is also in agreement with the principle of massive MIMO technology stating that at higher number of antennas at the transmit or receive side, the energy can be focused with extreme sharpness into small regions, which results in an improvement of the data rates and reliability and a reduction of the required transmit power [1][2][3][4], [24].…”

Section: Required Downlink Transmit Powersupporting

confidence: 77%

“…In the technology, a large number of antennas are deployed at the base stations (BSs) to serve many single-antenna user terminals [1,2]. It has the potentials of enhancing spectral and energy efficiency in a larger scale compared to conventional MIMO [1][2][3][4][5][6][7]. Moreover, when the number of antennas is larger than or equal to a given threshold, the irregular antenna arrays usually used outperform the regular arrays in the achievable rate [8].…”

Section: Introductionmentioning

confidence: 99%

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Massive MIMO with Transceiver Hardware Impairments: Performance Analysis and Phase Noise Error Minimization

2019

KSII TIIS

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In this paper, we investigate the impact of hardware impairments (HWIs) on the performance of a downlink massive MIMO system. We consider a single-cell system with maximum ratio transmission (MRT) as precoding scheme, and with all the HWIs characteristics such as phase noise, distortion noise, and amplified thermal noise. Based on the system model, we derive closed-form expressions for a typical user data rate under two scenarios: when a common local oscillator (CLO) is used at the base station and when separated oscillators (SLOs) are used. We also derive closed-form expressions for the downlink transmit power required for some desired per-user data rate under each scenario. Compared to the conventional system with ideal transceiver hardware, our results show that impairments of hardware make a finite upper limit on the user's downlink channel capacity; and as the number of base station antennas grows large, it is only the hardware impairments at the users that mainly limit the capacity. Our results also show that SLOs configuration provides higher data rate than CLO at the price of higher power consumption. An approach to minimize the effect of the hardware impairments on the system performance is also proposed in the paper. In our approach, we show that by reducing the cell size, the effect of accumulated phase noise during channel estimation time is minimized and hence the user capacity is increased, and the downlink transmit power is decreased.

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