1. For use in a wireless network, a transmitter configured to encode information, the transmitter comprising:
a cyclic redundancy check (CRC) encoder configured to encode a physical broadcast channel (PBCH) message using a cyclic redundancy check;
a timing dependent cyclic shift block configured to encode information in the PBCH message; and
a quasi-cyclic low-density parity-check (QC-LDPC) encoder configured to encode the PBCH message using a QC-LDPC code.
2. The transmitter of claim 1, wherein the timing dependent cyclic shift block is configured to encode the information in the PBCH message by cyclically shifting a plurality of bits in the PBCH message a predetermined number of times, the predetermined number corresponding to a value of the information in the PBCH message.
3. The transmitter of claim 2, wherein the PBCH message is divided into mb sections, each section having a same number of bits, and wherein the timing dependent cyclic shift block cyclically shifts using mb-sectionized cyclically shifting.
4. The transmitter of claim 3, wherein the timing dependent cyclic shift block mb-sectionized cyclically shifts a predetermined number of times.
5. The transmitter of claim 2, wherein the value of the information in the PBCH message is determined from a final two bits of a system frame number (SFN) of a frame.
6. The transmitter of claim 5, wherein the information in the PBCH message comprises frame timing information.
7. The transmitter of claim 1, wherein the timing dependent cyclic shift block encodes the information in the PBCH message and then the QC-LDPC encoder encodes the PBCH message using the QC-LDPC code.
8. The transmitter of claim 1, wherein the QC-LDPC encoder encodes the PBCH message using the QC-LDPC code before the timing dependent cyclic shift block encodes the information in the PBCH message.
9. The transmitter of claim 1, wherein the information in the PBCH message is encoded such that the information can be detected by a receiver either after or before QC-LDPC decoding of the PBCH message.
10. For use in a wireless network, a method of encoding information at a transmitter, the method comprising:
encoding a physical broadcast channel (PBCH) message using a cyclic redundancy check (CRC);
encoding information in the PBCH message; and
encoding the PBCH message using a quasi-cyclic low-density parity-check (QC-LDPC) code.
11. The method of claim 10, wherein encoding the information in the PBCH message comprises cyclically shifting a plurality of bits in the PBCH message a predetermined number of times, the predetermined number corresponding to a value of the information in the PBCH message.
12. The method of claim 11, wherein the PBCH message is divided into mb sections, each section having a same number of bits, and wherein cyclically shifting comprises mb-sectionized cyclically shifting.
13. The method of claim 12, wherein mb-sectionized cyclically shifting comprises mb-sectionized cyclically shifting a predetermined number of times.
14. The method of claim 10, wherein the value of the information in the PBCH message is determined from a final two bits of a system frame number (SFN) of a frame.
15. The method of claim 14, wherein the information in the PBCH message comprises frame timing information.
16. The method of claim 10, wherein the encoding of the information in the PBCH message is performed before the encoding of the PBCH message using the QC-LDPC code.
17. The method of claim 10, wherein the encoding of the PBCH message using the QC-LDPC code is performed before the encoding of the information in the PBCH message.
18. The method of claim 10, wherein the information in the PBCH message is encoded such that the information can be detected by a receiver either after or before QC-LDPC decoding of the PBCH message.
19. For use in a wireless communication network, a method of detecting frame timing at a receiver, the method comprising:
receiving code symbols of a physical broadcast channel (PBCH) in a message;
decoding the received code symbols using a quasi-cyclic low-density parity-check (QC-LDPC) code;
examining the QC-LDPC-decoded symbols for a cyclic redundancy check (CRC);
mb-sectionized cyclically shifting the QC-LDPC-decoded symbols; and
determining a current frame number based on a number of times the QC-LDPC-decoded symbols are cyclically shifted.
20. The method of claim 19, further comprising:
soft combining the received code symbols of a current frame with the received code symbols of at least one previous frame.
21. The method of claim 20, further comprising:
repeating the examining, mb-sectionized cyclically shifting, and soft combining steps until a CRC check is established.
22. The method of claim 19, wherein mb-sectionized cyclically shifting comprises mb-sectionized cyclically shifting a predetermined number of times.
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 connector housing;
a second connector to be engaged with the first connector housing;
a locking arm formed on an outer wall of any one of the first and second connector housings; and
a locking arm receiver formed vertically on an outer wall of the other connector housing,
wherein when the locking arm is locked on the locking arm receiver, the engagement of the first and second connector housings is maintained,
wherein the locking arm includes: an arm part extending vertically from the outer wall of the one connector housing and extending in an engaging direction of the first and second connector housings; and a locking part projecting laterally from the tip of the arm part in an extending direction of the arm part,
wherein when the first and second connector housings are engaged with each other, the locking part is moved over and locked on the locking arm receiver, and positioned on a side of the locking arm receiver,
wherein when the first and second connector housings are engaged with each other, the arm part of the locking arm is bent about a base end thereof, and the locking part of the locking arm is moved over a rib and locked on the locking arm receiver, and
wherein when the locking part of the locking arm is moved over the rib, a first contact position where the locking part firstly abuts on the rib is positioned higher than the base end in a bending direction of the arm part.