I see that you need help in modulating a signal in MATLAB using PAM modulation.

Here’s a step-by-step guide to generate and plot a PAM modulated signal for any given binary sequence using MATLAB:

1. Define the Binary Sequence:

- Start with the binary sequence you want to modulate, e.g., ‘001001111110’.

2. Create an Encoding Map:

- Use a mapping to convert binary pairs to amplitude values, for example:

‘00’ → ‘-2’

‘11’ → ‘5’

‘01’ → ‘2’

‘10’ → ‘-5’

This mapping can be implemented using a ‘containers.Map’ in MATLAB.

Refer the following documentation to learn more about ‘containers.Map’:

3. Initialize the Signal:

- Prepare an empty array to store the modulated signal values.
- Define the duration for each pulse, e.g., 300 samples.

4. Decode the Binary Sequence:

- Iterate through the binary sequence in steps matching the number of bits used per encoding unit.
- For each encoding unit, use the encoding map to find the corresponding amplitude.
- Append the amplitude value to the signal array, repeated for the pulse duration.

5. Plot the Modulated Signal:

- Create a time vector corresponding to the length of the modulated signal.
- Use the “plot” function to display the signal.

By following these steps, a PAM modulated signal can be effectively generated and visualized using MATLAB for any given binary sequence with a custom encoding scheme.

Here's an example of how this can be implemented in MATLAB:

binary_sequence = '001001111110';

encoding_map = containers.Map({'01', '10', '11', '00'}, [2, -5, 5, -2]);

for i = 1:2:length(binary_sequence)

pair = binary_sequence(i:i+1);

modulated_value = encoding_map(pair);

signal = [signal, repmat(modulated_value, 1, pulse_duration)];

plot(t, signal, 'LineWidth', 2);

title('PAM Modulated Signal');

Hope this helps.