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Raldi
0

Simulink bit operations

Raldi
さんによって質問されました 2011 年 12 月 16 日
Hi all, I wanted to ask if from a number of bits that are represented with 1 and 0 is possible to invert the ones to -1 each lets say two bits? Thanks in advance.

  2 件のコメント

Fangjun Jiang
2011 年 12 月 17 日
Not clear to me what do you mean by "from a number of bits" and "to invert the ones to -1 each lets say two bits". Are you saying that if you have an inputs of 10 bits, six 1s and four 0s, alternate randomly, you want to invert the first two 1s into -1?
Raldi
2012 年 1 月 13 日
basicaly i was trying to create an ami nrz line code, i think flip flops is the only way to do that. I havent finish it yet though.

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1 件の回答

Paulo Silva
回答者: Paulo Silva
2011 年 12 月 16 日

[1 0]------>Gain(-1)----->[-1 0]
Use the Gain block and define that gain as -1

  7 件のコメント

Walter Roberson
2011 年 12 月 16 日
How many bits per time sample is your generator producing? If it is one bit per time sample then perhaps use a step function that flips between -1 and 1 every two steps.
Walter Roberson
2011 年 12 月 16 日
Ah, instead of a step function, you could perhaps use a Repeating Sequence block, as mentioned at http://www.mathworks.com/matlabcentral/answers/15874-hi-all-i-am-having-a-difficulty-in-switching-a-signal-i-need-a-switch-in-simulink-that-must-be-on
Raldi
2012 年 1 月 13 日
I was thinking more of using a flip flop as it has memmory, The general idea was to create a simple ami-nrz line code.

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