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8QAM

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Assignment Help Answers with Step-by-Step Explanation:

symbols = [-3 -3i -1 -1i 1 1i 3 3i];

% Define the signal-to-noise ratio (SNR) in dB

% Map binary data to 8QAM symbols

qam_symbols = zeros(1, num_symbols);

% Add AWGN (Additive White Gaussian Noise) to the signal

snr = 10^(snr_dB/10);

demodulated_symbols = zeros(1, num_symbols);

for i = 1:num_symbols

% Calculate the bit error rate (BER)

bit_errors = sum(bit_stream ~= randi([0, 1], 1, length(bit_stream)));

% Plot the constellation diagram

scatterplot(demodulated_symbols);

In this code:

1. We define the 8QAM symbols and the SNR in dB.

6. Plot the constellation diagram.

Make sure you have the Communications Toolbox installed to use the `scatterplot` function for plotting the constellation diagram.