Package org.yamcs.tctm.ccsds.error

Class AosFrameHeaderErrorCorr

java.lang.Object

org.yamcs.tctm.ccsds.error.AosFrameHeaderErrorCorr

public class AosFrameHeaderErrorCorr
extends Object

Reed-Solomon (10, 6) encoding/decoding as specified in CCSDS RECOMMENDED STANDARD FOR AOS SPACE DATA LINK PROTOCOL CCSDS 732.0-B-3 September 2015 4.1.2.6 Frame Header Error Control

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	AosFrameHeaderErrorCorr.DecoderResult

Constructor Summary

Constructors

Constructor	Description
AosFrameHeaderErrorCorr()

Method Summary

Modifier and Type	Method	Description
static AosFrameHeaderErrorCorr.DecoderResult	decode(int gvcid, int signalingField, int errControl)	Based on the received header information, reconstitutes the correct header if possible
static int	encode(int gvcid, int signalingField)	Compute the Error Control word based on the virtual channel id and signaling field byte

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

AosFrameHeaderErrorCorr

public AosFrameHeaderErrorCorr()

Method Details

encode

public static int encode(int gvcid,
 int signalingField)

Compute the Error Control word based on the virtual channel id and signaling field byte

Parameters:

gvcid - 10-bit Master Channel Identifier followed by the Virtual Channel Identifier in the lowest 16 bits of the variable

signalingField - - 8 bit signalling byte in the lowest 8 bits of the variable

Returns:

decode

public static AosFrameHeaderErrorCorr.DecoderResult decode(int gvcid,
 int signalingField,
 int errControl)
                                                    throws ReedSolomonException

Based on the received header information, reconstitutes the correct header if possible

Parameters:

gvcid - 10-bit Master Channel Identifier followed by the Virtual Channel Identifier

signalingField - 8 bit signalling byte

errControl - 16 bits error control

Returns:

Throws:

ReedSolomonException - thrown if data cannot be decoded/corrected