Process in Week2

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 Week2:

In the second week, There are some things what we have done:


1.we divided the tasks of the project to the group in more detail. 

  a). Xinlu who was the main developer of the program would focus on realizing the code this week. 

  b). Cameron and Ruqayyah decided to make a start on the Sustainability Assignment which ties in with this group project.

  c). Jiashu and William were focusing on writing and modifying blogs about the group project.

2. Xinlu presented the group with some problems which we can collectively look at in order to help with the development of the code.

How to simulate the capacity performance of AWGN channel? According to the Shannon theorem, the channel capacity of AWGN channel is:

 How to deal with the bandwidth to get a plot of channel capacity as a function of SNR?

3. We had made some progress about problems at the meeting on Friday.

Since the channel capacity depends on the bandwidth and the SNR, we assumed that B=1 to obtain a figure of the channel capacity as a function of SNR per bit.However, the result we get is based on one specific situation, we are not sure whether the result can describe the general characteristic of the capacity performance.

4. The results of the code had made some progress after Friday.

The initial draft of the code was able to simulate a bipolar NRZ wireless system under additive white Gaussian noise. Since we are going to compare the BERs of unipolar and bipolar NRZ signalling, the simulation of unipolar NRZ signalling should be added into the original code. 

The results we should have after simulating is the figure of BERs as a function of SNR. The equations used are listed below:

After adding the simulation of unipolar NRZ signalling, the figure of BERs as a function of SNR per bit is obtained (shown below).

      

Figure 1: The BERs of bipolar NRZ and unipolar NRZ in AWGN channels


5. The materials provided by the tutor about fading effect were read.


Next week:

In the meeting, we discussed 4 objectives that we would all aim to do by week 3 and these were:

1. Read the material about fading effect again.

2. Complete the code for simulating the second noisy system.

3.Complete the Sustainability Report.



                           



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