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# mary

27 total contributions since 2012

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Question

Plotting a curve issue. i used to draw curves by semilogy but now i don't want it in logarithmetic form!
consider the following a=[3/4 1/2 1/4]; bb=[4.1 3.3 2.7]; cc=[5.9 5.2 4.7]; dd=[7.9 7.6 7.3]; plot(a,bb,'red','L...

2 years ago | 1 Answers | 0

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Question

issue in matrix multiplication
G=[1 1 1 1 1 0 0 0 1 0 0 0; 0 0 1 1 0 0 0 1 0 1 0 0; 1 1 1 0 1 0 0 1 0 0 1 0; 1 0 0 1 1 1 0 1 0 0 0 1]; m=[1 0...

3 years ago | 5 Answers | 0

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Question

if i want to change each value 1 in a matrix to 0 how to do that?
a=[1 2 3;1 3 3;2 1 2] is there a function that make a as below b=[0 2 3;0 3 3;2 0 2]

3 years ago | 1 Answers | 0

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Question

i need some help on matrix operations!
if i have the index matrix a a=[0 1 0 1 1 0 1] and matrix b contains the actual values v=[2 3 4 2 6 1 8] here i'm go...

3 years ago | 3 Answers | 0

### 3

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is there a function that calculates the no. of rows or cols
a=[1 1 1;1 1 1;1 1 1;1 1 1] no of rows=4 col=3

3 years ago | 2 Answers | 1

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changing from binary to polar form
is there a matlab function that directly maps 0 to -1 and 1 to +1??

3 years ago | 1 Answers | 0

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matrix multiplication issue.. i need the result to be in binary numbers
i have m=rand(1,4)>0.5; G=[1 1 1 1 1 0 0 0 1 0 0 0; 0 0 1 1 0 0 0 1 0 1 0 0; 1 1 1 0 1 0 0 1 0 0 1 0; 1 0 0 1...

3 years ago | 1 Answers | 0

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how to write an exponential eqn.
i want to write this the following equation in matlab e-((r+1)^2)/2 how should i write the exponential symbol "e"

3 years ago | 1 Answers | 0

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Question

how to make a curve smooth ??
if i have a result like a curve with sharp edges and i want to make the curve smooth how do i do this?? e.g like curves of snr v...

3 years ago | 2 Answers | 0

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Question

how to interleave a matrix and deinterleave it?? so it gets back to its original state?

3 years ago | 2 Answers | 0

### 2

Question

how do i change line to curve??
my snr & ber curve appeared as a line not curve while plotting it how can i change the line to curve

3 years ago | 0 Answers | 0

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Question

please can anyone help?? i need a matlab code for turbo code and the decoding is by using viterbi
i have tried to find it using file exchange but i ddidnt find it pls help

3 years ago | 1 Answers | 0

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Question

how to rearrange an array? rows to columns?
ex: a=[1 1 1; 2 2 2; 3 3 3] to aa=[1 2 3; 1 2 3; 1 2 3]

3 years ago | 2 Answers | 0

### 2

Question

how can i make an array of letters? is it possible
like i have a=[1:26] i want something like a=[a:z]

4 years ago | 2 Answers | 0

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Question

is this matlab code of 8psk ??
l=100000; %L length of si the input one dimension array nni=randn(1,l);%generate L by L array of random scalare ...

4 years ago | 1 Answers | 0

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Question

why the transmitted data (the kind of data we deal with) in qpsk is complex data while the one we deal with in 8psk is real data...

4 years ago | 1 Answers | 0

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Question

how to mix the result of 3 programs (3 curves) in a single figure contains all of these curves?
the first program : l=100000; %L length of si the input one dimension array nni=randn(1,l);%generate L by L array of rand...

4 years ago | 2 Answers | 0

### 2

Question

how to shift arrays to the left
if i have a=[0 0 0 0 0 0 0 0] a(1,8)=5; shifting a will results in : a=[0 0 0 0 0 0 5 0] how can i do that?

4 years ago | 1 Answers | 0

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Question

why this prog is not working properly??
L=10; a=1/(2^(1/2)); arr=[0 0 0 0 0 0 0 0 0 1 0;0 1 0 0 1 0 0 1 0 0 1;1 0 0 0 0 0 1 0 0 -1 0;1 1 0 0 1 0 1 1 0 0...

4 years ago | 0 Answers | 0

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how to generate a matrix of 1 by L dimentions contains complex data from real and imaginary components
how to generate a matrix of 1 by L dimentions contains complex data from real and imaginary components.

4 years ago | 1 Answers | 0

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Question

how to shift arrays to the right??
for example i have : arr=[1 0 1 1 0 0 0 1];i want to shift it one step to the right and add a random bit to the left my ar...

4 years ago | 1 Answers | 0

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Question

i need a TCM (trellis coded modulation) matlab code
Uing 2/3 convolutional encoder and viterbi decoder

4 years ago | 1 Answers | 0

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Question

how to generate a random digital sequence formed of only two bits
fo example how to generate 00 or 01 0r 10 or 11 randomly?

4 years ago | 1 Answers | 0

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Question

finite state machine ( r=m/m+1 convolutional encoder) .. in trellis coded modulation
i need an example of a finite state machine (2/3 convolutional encoder) with its truth table can anyone help me plz?

4 years ago | 0 Answers | 0

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Question

how to create a table in matlab to list my results in without the need to run the program each time to get the results and plot
i ran the same program twice in two cases to get the value of SNR & BER and i got two list of values for each .. how can i apply...

4 years ago | 3 Answers | 0

### 3

Question

is there a function in matlab that creates a binary repetition coder ?
for example when i enter a sequence 0010110 ;when n=3 the result will be 000000111000111111000

4 years ago | 2 Answers | 0