The system above is clean (without added noise). This just shows that at least 4 different users can be extracted from the interference pattern comprised of 64 unique spread signals. Its important to test if the system is capable of spreading and despreading the signal before integrity testing can be done. Each signal is colour coordinated with their spreading signal and despread data code, making the evaluation easier.
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The same users would like to transmit a different set of data, but this time the system is being affected by some form of noise. The noise used was a random 1 & -1 sequence with the same length as the interference pattern and added to it before the data is despread. The data does keep its original shape however it has a slightly distorted to it but only slightly and as we have noticed, the same noise becomes less effective as the length of the spreading code increases, which boasts improved performance.
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