Generate a square pulse

Question

Ahmed Hassanen 2021-11-3

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链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1577935-generate-a-square-pulse

回答： Abhinaya Kennedy 2024-6-12

create exactly one square pulse with the specified parameters. This square pulse should be stored in the array called one_square. The dimensions of this array should be 1 x N_sq_pos. The length of the square pulse you generate should be equal to N_sq_pos, i.e., the variable one_square should not change dimensions after you generate the pulse. Keep in mind that you have to set the energy of the square pulse to be equal to E_bit.

Inputs:

% t_axis: Time axis

% T_sq_dur: Duration of the square pulse in seconds

% E_bit: Total energy in all samples of one square pulse

% fs: Sampling frequency

% x_bits: Sequence of input bits (if not available, then it is equal

% to 1)

% type: Type of bit coding, 'RZ' or 'NRZ' (default is 'RZ')

% Outputs:

% x_square: The sequence of samples corresponding to the pulse shaping

% of the input bits using a square pulse shape

Output like this :

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Ahmed Hassanen 2021-11-3

编辑：Ahmed Hassanen 2021-11-3

Fixed Parameter:

fs = 1e5; % Sampling rate (samples per sec)

Ts = 1/fs; % Sampling time

N = 102400 - 1; % Total number of samples

t_axis = (0:N-1)*Ts; % Time axis (the same during the entire experiment)

f_axis = -fs/2:fs/N:fs/2-1/N; % Frequency axis (the same during the entire experiment)

T_sq = 100*Ts; % The duration of the square pulse (an integer number of sampling times)

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Answer 1

Abhinaya Kennedy 2024-6-12

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1577935-generate-a-square-pulse#answer_1470636

Generating the Pulse:

Create a time axis "(t_axis)" from "0" to "T_sq_dur" with samples based on "fs".
Calculate pulse amplitude (A) using "A = sqrt(E_bit / T_sq_dur)".
Generate a binary sequence "(x_square)" with "x_bits" for the pulse duration (considering RZ transitions if applicable).
Scale the sequence by A to get the final pulse with the required energy level.\

Square wave generation: https://www.mathworks.com/help/signal/ref/square.html

Array Dimensions:

The pulse ("one_square") should be a 1 x N_sq_pos array, where N_sq_pos is the number of samples based on "fs". This ensures the array maintains its size after generation.

By following these steps, you can create a square pulse and store it in the "one_square" array for further use.