Abstract
In Heterogeneous networks (HetNets), operators need to ensure reliable service to their users in terms of network performance and low cost. The growing demand of user traffic necessitates the incorporation of femto cells and pico cells for facilitating seamless services. The network performance of Long Term Evolution (LTE) and LTE Advanced (LTE-A) HetNets is drastically influenced by the degree of interference that is realized in the inter-cell and intra-cell during communication. In this paper, an Improved Hybrid inter and intra-cell interference cancellation mechanism (CRS-IIC-LFLS) is propounded for handling interference at the inter and intra-cell level. Inter-cell interference cancellation is achieved through the use of an Improved CRS-IIC algorithm that uses the benefits of Linear Filtering Least Square (LFLS) method for channel estimation. CRS-IIC-LFLS is found to potent in rapid interference cancellation facilitation by suppressing the noise level, reducing the impact of fading channel and inherently eliminates small energy aware paths from large energy aware paths. The Simulation results confirm that the proposed scheme ensures better network throughput under light load, medium load and heavy load conditions of the network. The results prove that the performance of CRS-IIC-LFLS with CRS-IC-LFLS and CRS-IC-LLS based on spectral efficiency is improved at a mean rate of 21% and 26% respectively. The simulation results also portrays that the increase in the spectral efficiency of CRS-IIC-LFLS (64-QAM) is phenomenal to a maximum improvement of 12% over CRS-IIC-LFLS (16-QAM).
Highlights
In the recent decade, it is realized that the data traffic over cellular networks has faced a dramatic and explosive growth
First the performance ofCRS-Improved Interference Cancellation (IIC)-Linear Filtering Least Square (LFLS) is analyzed based on BER and BLER with respect to change in SNRs and the increase in percentage of spectrum efficiency achieved by the cell specific reference signal (CRS)-IIC-LFLS (64-QAM), CRS-IIC-LFLS (16 QAM), CRS-IC-LFLS and CRS-IC-LLS approaches are compared by varying the network load conditions
The proposed CRS-IICLFLS technique is identified to be predominant than the considered interference cancellation schemes for two main reasons
Summary
It is realized that the data traffic over cellular networks has faced a dramatic and explosive growth. The CRS-IC-LFLS and CRS-IC-LLS approaches used a strategy of log-likelihood ratio based muting and puncturing method They utilized a receiver algorithm that has the potential of integrating interference cancellation scheme with direct decision oriented estimation of channel that resolves the issue of non-colliding CRS. The timing and frequency offset decreases the network performance to a maximum degree under the impact of non-colliding CRS situation Still, it lacks in achieving better throughput and spectral efficiency under possible network load conditions. Inter-cell interference cancellation is achieved through the use of an Improved CRS-IIC algorithm that uses the benefits of Linear Filtering Least Square (LFLS) method for channel estimation.
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