Contains C and C programs from various categories and notes on data srtuctures and C program related to it. Do leave a comment if you have benefited from my programs. Design and Implementation of 2. 4 GHz band Zigbee Transmitter for an Acknowledgement Frame Using Verilog HDL.
-->The following example encodes and decodes simple, general data, and illustrates the following tasks and CryptoAPI functions.
![Cyclic Encoder C Program Cyclic Encoder C Program](/uploads/1/2/5/6/125633894/291246733.png)
- Determining the length needed for the buffer to hold the encoded data using CryptMsgCalculateEncodedLength.
- Opening a message for encoding using CryptMsgOpenToEncode.
- Adding content to the encoded message using CryptMsgUpdate.
- Copying the encoded message into a buffer using CryptMsgGetParam.
- Closing the encoded message using CryptMsgClose.
- Opening a message to decode using CryptMsgOpenToDecode.
- Using CryptMsgUpdate and CryptMsgGetParam to get the decoded data.
This example uses the function MyHandleError. The code for this function is included with the sample. Code for this and other auxiliary functions is also listed under General Purpose Functions.
Create systematic cyclic code from binary vector data
Library
Block sublibrary of Error Detection and Correction
![Cyclic Cyclic](/uploads/1/2/5/6/125633894/687648929.jpg)
Description
The Binary Cyclic Encoder block creates a systematic cyclic code with message length K and codeword length N.
This block accepts a column vector input signal containing K elements. The output signal is a column vector containing N elements.
You can determine the systematic cyclic coding scheme in one of two ways:
- To create an [N,K] code, enter N and K as the first and second dialog parameters, respectively. The block computes an appropriate generator polynomial, namely,
cyclpoly(N,K,'min')
. - To create a code with codeword length N and a particular degree-(N-K) binary generator polynomial, enter N as the first parameter and a polynomial character vector or a binary vector as the second parameter. The vector represents the generator polynomial by listing its coefficients in order of ascending exponents. You can create cyclic generator polynomials using the Communications Toolbox™
cyclpoly
function.
For information about the data types each block port supports, see the Supported Data Type table on this page.
Parameters
The codeword length, which is also the output vector length.
Either the message length, which is also the input vector length, a polynomial character vector, or a binary vector that represents the generator polynomial for the code.
Supported Data Type
Port | Supported Data Types |
---|---|
In |
|
Out |
|
See Also
cyclpoly
(in the Communications Toolbox documentation)