MT Golay Decoder (G Dataflow)

Version:

Decodes a Golay-encoded bit stream. The decoder provides the two triple-correcting Golay codes: the Golay (23,12,3) code and the extended Golay (24,12,3) code. This node uses the Arithmetic decoding algorithm for decoding the Golay (23,12,3) encoded bit stream and the Kasami error-trapping decoding algorithm for decoding the extended Golay (24,12,3) encoded bit stream.

input bit stream

The bit sequence representing the Golay-encoded bits to decode. You can use MT Golay Encoder to generate the encoded bit stream.

Tip

To ensure that the output bit stream returned by the Golay decoder corresponds to the complete message, give input bit stream a length that is an integer multiple of 23 (for the Golay (23,12,3) code) or 24 (for the Golay (24,12,3) code). If the length of input bit stream is not an integer multiple of 23 or 24, the last {length(input bit stream) modulo 23} bits are buffered in the decoder {length(input bit stream) modulo 24} bits (for Golay (24,12,3) code). These bits are added to the beginning of the incoming bit stream during the next iteration if reset? is set to FALSE.

golay code type

The values of the code word length (n), data word length (k), and error correcting capacity (t), in bits.

Name Description
Golay (23,12,3)

The (n,k,t) values are (23, 12, 3).

Golay (24,12,3)

The (n,k,t) values are (24, 12, 3).

Default: Golay (23,12,3)

error in

Error conditions that occur before this node runs.

The node responds to this input according to standard error behavior.

Standard Error Behavior

Many nodes provide an error in input and an error out output so that the node can respond to and communicate errors that occur while code is running. The value of error in specifies whether an error occurred before the node runs. Most nodes respond to values of error in in a standard, predictable way.

error in does not contain an error error in contains an error
If no error occurred before the node runs, the node begins execution normally.

If no error occurs while the node runs, it returns no error. If an error does occur while the node runs, it returns that error information as error out.

If an error occurred before the node runs, the node does not execute. Instead, it returns the error in value as error out.

Default: No error

reset?

A Boolean that determines whether the internal state of the decoder is cleared.

 TRUE Clears any buffered bits from previous iterations. FALSE Continues decoding from the previous iteration. Any buffered bits from the previous iteration are added to the beginning of the input bit stream prior to decoding.

Default: TRUE

output bit stream

Bit sequence decoded by this node.

error out

Error information.

The node produces this output according to standard error behavior.

Standard Error Behavior

Many nodes provide an error in input and an error out output so that the node can respond to and communicate errors that occur while code is running. The value of error in specifies whether an error occurred before the node runs. Most nodes respond to values of error in in a standard, predictable way.

error in does not contain an error error in contains an error
If no error occurred before the node runs, the node begins execution normally.

If no error occurs while the node runs, it returns no error. If an error does occur while the node runs, it returns that error information as error out.

If an error occurred before the node runs, the node does not execute. Instead, it returns the error in value as error out.

Where This Node Can Run:

Desktop OS: Windows

FPGA: Not supported

Web Server: Not supported in VIs that run in a web application