Selecting one channel out of many wireless channel based on max channel gain?

Question

Chetan Fadnis 2022-7-4

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1753375-selecting-one-channel-out-of-many-wireless-channel-based-on-max-channel-gain

回答： Muskan 2023-9-5

采纳的回答： Muskan

Sir,

I have following code for selecting one channel out of 5 channels.

C0=10^-3; %path loss at refrence distance 1m.

K1=5; %devices in Group-1

d1=[8.5 9 8.0 9.5 10]; %set of all longest distances (d1>8) between HAP-WD in group-1

%d1 = 8 + (12-8).*rand(K1,1); %set of all longest distances between HAP-WD in group-1

n1=2+(4-2).*rand(K1,1); %path loss exponent between (2 and 4)

L1=C0.*(d1).^-n1; %Path-loss model HAP-WD in group-1

rng(0,'twister');

hhw1=max(sqrt(L1/2).*(randn(K1,1)+1i*randn(K1,1))); % HAP-WD group 1 K1*1 , max channel

this hhw1 produces 1*5 matrix, I have to chose only one out of these five values based on the maximum gain, How can I write this code in more efficient manner. Also how I can make d1 distance to be a random quantity but greator than 8 (One way which is commented is correct?)?

Thanks in anticipation.

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Muskan 2023-9-5

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1753375-selecting-one-channel-out-of-many-wireless-channel-based-on-max-channel-gain#answer_1301861

在 MATLAB Online 中打开

Hi Chetan,

As per my understanding of the question, for making the distance “d1” to be a random quantity but greater than 8, the commented code given by you is correct.

For choosing only one out of these five values based on the maximum gain, you can try the following:

C0 = 10^-3;  
K1 = 5;  
d1 = 8 + (12-8).*rand(K1,1);  
d1n1 = 2 + (4-2).*rand(K1,1);  
L1 = C0.*(d1).^-n1;  
rng(0,'twister'); 
hhw1 = (sqrt(L1/2).*(randn(K1,1)+1i*randn(K1,1)));  
disp(hhw1) ; 
[~, maxIndex] = max(hhw1);  
selectedChannel = hhw1(maxIndex);  
disp(selectedChannel); 

In this modified code, the “max” function is used to find the maximum gain in the “hhw1” matrix. The “maxIndex” variable stores the index of the maximum gain, and the “selectedChannel” variable selects the channel with the maximum gain.

I hope the above information helps resolve your query.

Thanks