Link level performance evaluation of higher order modulation in Small Cells

Abstract

In Heterogeneous networks (HetNet), low-power Small Cells (SCs) can serve a good portion of the mobile users. These users are likely to have good Signal-to-Interference-plusNoise-Ratio (SINR) values, which can be exploited to satisfy the expected demand of huge data rates. In this paper, we investigate the effect of introducing higher order modulation, mainly 256QAM, from a link-level perspective as a possible solution to this data explosion. 256 QAM in ideal channel conditions and high SINR range, achieves higher spectral efficiency compared to 64 QAM. However, due to transmitter and receiver impairments the gain of 256 QAM is questionable. we developed a physicallayer abstraction for the link-level performance of the 256QAM modulation order. Then, we evaluated the performance of 256 QAM in realistic environment including the impairments at the transmitter and receiver. These impairments can diminish the gains of 256 QAM depending on their magnitude.

Performance Study on Seamless DA2GC for Aircraft Passengers toward 5G

“…The equality is caused by maximum modulation, which is 256QAM in both cases. It means that even if the 5G DA2GC network is able to provide a SINR of nearly 43 dB in the cell center, 256QAM is not capable to fully exploit SINR higher than 28 dB [15]. In other words, if SINR is higher than 28 dB, the highest modulation and coding scheme with the maximal efficiency is always selected and thus no improvement in capacity can be seen for SINR levels higher than 28 dB.…”

“…According to [3], currently, only 36% of all aircraft are equipped with onboard Internet connection provided mostly via satellites. Available satellite A2G solutions exploit mostly S (2 -4 GHz), Ku (12)(13)(14)(15)(16)(17)(18) and Ka (26.5-40 GHz) bands and offer maximally tens of Mb/s/aircraft. Since throughput available via satellite is insufficient, only 6% of aircraft are able to deliver high-speed connectivity enabling video streaming and other highly demanded services [3].…”

Performance analysis of LTE-A with 256-QAM

“…Authors in [6] addressed the link level performance evaluation of 256-QAM. Their results demonstrated 33% throughput increase in an A WON channel compared to 64-QAM, while the throughput decreased to 23.1 % in a more realistic channel i.e.…”

Traffic-aware user association technique for dynamic on/off switching of small cells

“…(N sf ) is the number of subframes in a frame, which is set to 10 assuming only downlink transmission. (TBS) is the Transport Block Size which is the data that could be transmitted per resource unit corresponding to a certain SINR [13] [14] since as the SINR increases higher data rate could be utilized. (NQ) represents number of quanta (1 Quantum = 5 Resource Blocks) in the system, which is fixed for our simulation to 10 for a 10 MHz bandwidth for both MC and SC center frequencies.…”