Poster

unipolar and bipolar

Q function

From the soures, we can know the Q function.

This is the code of the Q function.

Matlab operating results of the part of the capacity channel

Two weeks ago, our group established a Matlab model. When the code has been done, we encountered some problems. Under the help of our supervisor and classmates, we have solved these problems.

The simulation of capacity channel

From the methodologies of last post, our group has done the matlab codes of the capacity part.

Simulation of Communication Systems with MATLAB

Methodology channel capacity

Need to create a matlab model，

The abscissa x is the SNR (2)

S=Eb (energy)

B（bandwidth）In this project, the B equal to a constant 1.

The vertical axis there are four

1, channel capacity （3）

Our supervisor told us the a is equal to 2 in this project.

Then the channel capacity, which is defined to be am upper bound for the data rate that can be achieved with an arbitrarily small error probability in an AWNG channel,

2, fading channel capacity(9)

Channel gainσ√(Л/2)

σ=randn(1,1)+jrandn(1,1)

This is get from our supervisor should be used in the matlab.

3，            low channel capacity

Low band

4,up channel capacity

Rayleigh Channel Capacity---week2

One of this project that is channel capacity has been done. 

We consider single-user transmission over a Rayleigh flat fading channel, in which the Channel State Information (CSI) is known by the receiver only. Subject to an average transmit power constraint; we study the capacity of an Additive White Gaussian Noise (AWGN) channel with Rayleigh fading. Under an independently identically distributed fading assumption, lower and upper bounds of the channel capacity are given and proved and they are compared to the capacity results numerically computed. Besides, an approximation result of such channel capacity is proposed, and by conducting numerical comparison it is shown that our suggested approximation result has a better performance in approximating Rayleigh fading channels capacity than the bounds given above. In addition, the channel capacity with outage probability is discussed and compared with different outage probabilities.

Rayleigh Channels' Capacity---week 1

In the first week of the project, we defined the purpose of the project. This project has been divided into two parts channel capacity and bit error rate (BER) of high wireless communication system. The main part of this project is simulated with Matlab.