1. A coding apparatus comprising:
a puncture rule setting means for, when carrying out puncturing of some redundant bits in an LDPC code having a check matrix of LDGM structure, setting up a puncture rule of preventing redundant bits which are chained to one another from being punctured;
an LDPC coding means for LDPC-coding information bits to generate an LDPC-coded signal; and
a puncturing means for puncturing redundant bits out of the LDPC-coded signal generated by said LDPC coding means according to the puncture rule set up by said puncture rule setting means.
2. A coding method comprising the steps of: when carrying out puncturing of some redundant bits in an LDPC code having a check matrix of LDGM structure, setting up a puncture rule of preventing redundant bits which are chained to one another from being punctured; LDPC-coding information bits to generate an LDPC-coded signal; and puncturing redundant bits out of said LDPC-coded signal according to said puncture rule.
3. A coding apparatus comprising:
a puncture rule setting means for, when carrying out puncturing of some redundant bits in an LDPC code having a check matrix of QC structure and LDGM structure, setting up a puncture rule of preventing redundant bits which are chained to one another from being punctured;
an LDPC coding means for LDPC-coding information bits to generate an LDPC-coded signal; and
a puncturing means for puncturing redundant bits out of the LDPC-coded signal generated by said LDPC coding means according to the puncture rule set up by said puncture rule setting means.
4. The coding apparatus according to claim 3, characterized in that the puncture rule setting means sets up the puncture rule of preventing redundant bits which are chained to one another at intervals of length equal to a size of a unit matrix in the check matrix of QC structure and LDGM structure from being punctured.
5. A coding method comprising the steps of: when carrying out puncturing of some redundant bits in an LDPC code having a check matrix of QC structure and LDGM structure, setting up a puncture rule of preventing redundant bits which are chained to one another from being punctured; LDPC-coding information bits to generate an LDPC-coded signal; and puncturing redundant bits out of said LDPC-coded signal according to said puncture rule.
6. The coding apparatus according to claim 5, characterized in that the puncture rule is the one of preventing redundant bits which are chained to one another at intervals of length equal to a size of a unit matrix in the check matrix of QC structure and LDGM structure from being punctured.
7. A coding and decoding apparatus comprising:
a puncture rule setting means for, when carrying out puncturing of some redundant bits in an LDPC code having a check matrix of LDGM structure, setting up a puncture rule of preventing redundant bits which are chained to one another from being punctured;
an LDPC coding means for LDPC-coding information bits to generate an LDPC-coded signal;
a puncturing means for puncturing redundant bits out of the LDPC-coded signal generated by said LDPC coding means according to the puncture rule set up by said puncture rule setting means;
a depuncturing means for depuncturing the LDPC-coded signal punctured by said puncturing means according to the puncture rule set up by said puncture rule setting means; and
an LDPC decoding means for carrying out LDPC decoding of the LDPC-coded signal depunctured by said depuncturing means to output information bits.
8. A coding and decoding apparatus comprising:
a puncture rule setting means for, when carrying out puncturing of some redundant bits in an LDPC code having a check matrix of QC structure and LDGM structure, setting up a puncture rule of preventing redundant bits which are chained to one another from being punctured;
an LDPC coding means for LDPC-coding information bits to generate an LDPC-coded signal;
a puncturing means for puncturing redundant bits out of the LDPC-coded signal generated by said LDPC coding means according to the puncture rule set up by said puncture rule setting means;
a depuncturing means for depuncturing the LDPC-coded signal punctured by said puncturing means according to the puncture rule set up by said puncture rule setting means; and
an LDPC decoding means for carrying out LDPC decoding of the LDPC-coded signal depunctured by said depuncturing means to output information bits.
9. A communication apparatus comprising:
a puncture rule setting means for, when carrying out puncturing of some redundant bits in an LDPC code having a check matrix of LDGM structure, setting up a puncture rule of preventing redundant bits which are chained to one another from being punctured;
an LDPC coding means for LDPC-coding information bits to generate an LDPC-coded signal;
a puncturing means for puncturing redundant bits out of the LDPC-coded signal generated by said LDPC coding means according to the puncture rule set up by said puncture rule setting means;
a transmitting means for transmitting the LDPC-coded signal punctured by said puncturing means;
a receiving means for receiving the LDPC-coded signal transmitted from said transmitting means;
a depuncturing means for depuncturing the LDPC-coded signal punctured by said puncturing means according to the puncture rule set up by said puncture rule setting means; and
an LDPC decoding means for carrying out LDPC decoding of the LDPC-coded signal depunctured by said depuncturing means to output information bits.
10. A communication apparatus comprising:
a puncture rule setting means for, when carrying out puncturing of some redundant bits in an LDPC code having a check matrix of QC structure and LDGM structure, setting up a puncture rule of preventing redundant bits which are chained to one another from being punctured;
an LDPC coding means for LDPC-coding information bits to generate an LDPC-coded signal;
a puncturing means for puncturing redundant bits out of the LDPC-coded signal generated by said LDPC coding means according to the puncture rule set up by said puncture rule setting means;
a transmitting means for transmitting the LDPC-coded signal punctured by said puncturing means;
a receiving means for receiving the LDPC-coded signal transmitted from said transmitting means;
a depuncturing means for depuncturing the LDPC-coded signal punctured by said puncturing means according to the puncture rule set up by said puncture rule setting means; and
an LDPC decoding means for carrying out LDPC decoding of the LDPC-coded signal depunctured by said depuncturing means to output information bits.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A connector, comprising:
a first housing with first terminal fittings, at least one first cam follower formed on the first housing;
a second housing connectable with the first housing;
a moving plate movable in the first housing while permitting the first terminal fittings to pass therethrough, at least one second cam follower formed on the moving plate;
a lever supported on the second housing for moving along an outer surface of the second housing, the lever having at least one inner surface and at least one outer surface opposite to the inner surface, at least one first cam groove formed on the outer surface of the lever and engageable with the first cam follower, and at least one second cam groove formed on the inner surface of the lever and being engageable with the second cam follower, entrances of the first and second cam grooves being offset from one another in a rotational direction of the lever, movement of the lever moves the second housing and the moving plate towards or away from the first housing.
2. The connector of claim 1, wherein the lever includes two arms on opposite sides of the second housing, the at least one second cam groove comprises two cam groove formed respectively in the inner surfaces of the arms.
3. The connector of claim 1, wherein the at least one second cam follower comprises two second cam followers formed on the moving plate at positions deviated in opposite directions from a widthwise middle position.
4. The connector of claim 1, wherein a seal ring is provided on the moving plate.
5. The connector of claim 1, wherein the first cam followers and the second cam followers are asymmetrically arranged with respect to a width direction.
6. The connector of claim 1, wherein the first housing includes a receptacles at least partly surrounding the first terminal fittings, and the moving plate is movable in the receptacle while permitting the first terminal fittings to pass therethrough.
7. The connector of claim 6, wherein the first cam follower projects from an inner peripheral surface of the receptacles.
8. The connector of claim 7, wherein the second cam follower projects towards the inner peripheral surface of the receptacle.