A Cognitive Femtocell can be defined as a cognitive radio (CR) enabled Femtocell. The concept of Cognitive Femtocell is becoming a promising approach to enabling multi-tiered opportunistic access in next generation cellular broadband wireless systems. Regarding to finding the spectrum opportunities in Cognitive Femtocell Networks, there are numerous sensing methods that can be applied depending on the system requirements and network architecture. For example local sensing could be used in Femtocell base stations, or exchanged sensing data of neighbours could also be used. Moreover, sensing could be conducted synchronously in the network, or each component could perform sensing on its own schedule.
This project requires you to understand the cognitive femcell concept and propose a new approach to the cognitive femtocell in LTE.
• Required Knowledge:Wireless communication, Signal processing
• Recommended Tools/Language:Matlab
•Project type:Software
Main tasks:
• An in-depth understanding of femtocell.
• Design a simulation of a femtocell for 3GPP LTE in Matlab.
• Verify the model with the existing results.
• Compare the simulation results with the common used Macrocell scenario (without femtocell).
I have read the project introduction in your email. According to it, I think your tasks are mainly to:
1) Read relevent materials about Femtocells expecially Cognitive Femtocells.
2) Investigate thoroughly existing spectrum sensing algorithms in LTE Cognitive Femtocell scenario.
3) Choose one algorithm from previous step that is most suitable to your project, build a simulator according to that and implement the algorithm.
4) Compare your simulation results with the results in the original paper.
5) Improve the algorithm based on your understanding, modify the simulation accordingly, and compare the simulation results with Macrocell Scenario (without Femtocell).
2. Chinese analysis of design requirements
I have read the project introduction in your email. According to it, I think your tasks are mainly to:
1) Read relevent materials about Femtocells expecially Cognitive Femtocells.
Read the related information, Tebian is related to the cognitive Femtocell.
2) Investigate thoroughly existing spectrum sensing algorithms in LTE Cognitive Femtocell scenario.
Research on the algorithm of cognitive Femtocell in LTE .
3) Choose one algorithm from previous step that is most suitable to your project, build a simulator according to that and implement the algorithm.
Choose an algorithm, establish a simulation environment, then implement the algorithm, and perform simulation.
4) Compare your simulation results with the results in the original paper.
Compare your simulation results with the simulation results in the paper.
5) Improve the algorithm based on your understanding, modify the simulation accordingly, and compare the simulation results with Macrocell Scenario (without Femtocell).
The Femtocell 's spectrum sensing algorithm is compared with the simulation without femtocell , and the simulation performance of the two algorithms is compared.
The most critical algorithm required for the paper is: existing spectrum sensing algorithms in LTE Cognitive Femtocell scenario
Namely: Cognitive Radio Spectrum Sensing Algorithm in Femtocell System!
2. Design implementation and simulation description
2.1 Simulation preparation
According to the task requirements of the subject, the entire subject can be divided into three parts:
First: data research;
Second: the simulation of the algorithm proposed in the paper, this part will use MATLAB for simulation;
Third: Compare the femtocell algorithm with the original algorithm of macrocell without femtocell.
Before the simulation analysis, first briefly explain the femtocell spectrum sensing model,
Therefore, the purpose of Femtocell's spectrum sensing is to detect which channels are used by macro system users within the interference range , so as to avoid these channels. The detection method is mainly to determine whether it is within the interference range of the Femtocell system by detecting the energy of the macro system user received on the uplink channel .
Generally, the basic structure model of spectrum sensing technology is as follows:
In the figure, the hollow triangle is the macro base station, the solid triangle is the fetmo base station, the small hollow circle is the macro user, and the solid circle is the femto user.
2.2 Key points of simulation
Here, mainly prevent the pd curve, pf curve and pm curve of the system.
2.1 Simulation analysis of spectrum sensing algorithm without Femtocell
That is, under normal circumstances, that is, without considering the presence of femto, the cell is simulated and analyzed by spectrum sensing technology.
2.2 Simulation of spectrum sensing algorithm based on Femtocell
