Energy efficiency analysis of single-cell massive MIMO under pilot contamination
| Autor: | Saqib Ishaq Khan, Waseem Khan, Shahzad Anwar, Umer Amin |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Engineering
business.industry ComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKS 05 social sciences MIMO Electrical engineering 050801 communication & media studies 020206 networking & telecommunications Data_CODINGANDINFORMATIONTHEORY 02 engineering and technology Spectral efficiency Transmitter power output Precoding Base station 0508 media and communications 0202 electrical engineering electronic engineering information engineering Electronic engineering Radio frequency Antenna (radio) business Computer Science::Information Theory Efficient energy use |
| Zdroj: | 2016 13th International Bhurban Conference on Applied Sciences and Technology (IBCAST). |
| Popis: | Multiuser MIMO with large antenna arrays is a promising technology for future cellular networks as it offers higher spectral efficiency and reduction in transmit power. However, deploying more antennas at the base stations (BSs) requires the same number of radio frequency (RF) chains as that of BS antennas. Circuit power consumed in these RF chains scales linearly with the number of BS antennas. The circuit power of these RF chains makes the overall power consumption significantly higher albeit the reduction in transmit power. In the large antenna size regime, this circuit power consumption can not be neglected as it can results in poor energy efficiency. In this paper, we will evaluate the energy efficiency of maximum-ratio-transmission (MRT) precoding in the downlink of a single-cell massive MIMO under a realistic power consumption model. More specifically, we will evaluate energy efficiency under so called pilot contamination which occurs in the single-cell massive MIMO systems when the number of active users K is greater than the pilot sequence length t. We will provide analytical expressions of signal-to-interference-plus-noise ratio (SINR) and the energy efficiency as a function of BS antenna size M. Moreover, the optimal value of M in terms of maximizing the energy efficiency of a single-cell massive MIMO system will be obtained analytically and verified through simulations. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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