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# mary

Active since 2012

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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...

bijna 10 jaar ago | 1 answer | 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...

ongeveer 10 jaar ago | 5 answers | 0

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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]

ongeveer 10 jaar ago | 1 answer | 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...

ongeveer 10 jaar ago | 3 answers | 0

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Question

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

ongeveer 10 jaar 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??

ongeveer 10 jaar ago | 1 answer | 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...

ongeveer 10 jaar ago | 1 answer | 0

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Question

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"

ongeveer 10 jaar ago | 1 answer | 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...

meer dan 10 jaar ago | 2 answers | 0

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

bijna 11 jaar ago | 2 answers | 0

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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

bijna 11 jaar 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

bijna 11 jaar ago | 1 answer | 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]

bijna 11 jaar ago | 2 answers | 0

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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]

bijna 11 jaar 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 ...

ongeveer 11 jaar ago | 1 answer | 0

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Question

question about qpsk and 8psk
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...

ongeveer 11 jaar ago | 1 answer | 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...

ongeveer 11 jaar ago | 2 answers | 0

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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?

ongeveer 11 jaar ago | 1 answer | 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...

ongeveer 11 jaar ago | 0 answers | 0

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Question

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.

ongeveer 11 jaar ago | 1 answer | 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...

ongeveer 11 jaar ago | 2 answers | 0

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Question

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

ongeveer 11 jaar ago | 1 answer | 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?

ongeveer 11 jaar ago | 1 answer | 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?

ongeveer 11 jaar 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...

ongeveer 11 jaar ago | 3 answers | 0

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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

ongeveer 11 jaar ago | 2 answers | 0