Method of decoding physical broadcast channel in long term evolution system

摘要

The present invention relates, in general, to a method of decoding a Physical Broadcast Channel (PBCH) in a Long Term Evolution (LTE) system and, more particularly, to a method of detecting a Master Information Block (MIB) contained in a PBCH.

主权项

1. A method of extracting frame numbers, the method extracting frame numbers of a Physical Broadcast Channel (PBCH) transmitted by a base station so as to obtain a Master Information Block (MIB) in a Long Term Evolution (LTE) system, comprising:
calculating values obtained by shifting bit values constituting a 31-bit shift register to right 1600 times; performing an exclusive-OR operation on bit values of initially set specific bits among the values of the shift register shifted 1600 times; and descrambling results of performing the exclusive-OR operation, wherein the values obtained by shifting bit values constituting a 31-bit shift register to right 1600 times are calculated using an equation:
X1(1600+n)=X1(25+n)⊕X1(20+n)⊕X1(19+n)⊕X1(17+n)⊕X1(12+n)⊕X1(9+n)⊕X1(6+n)⊕X1(5+n)⊕X1(4+n)⊕X1(3+n)⊕X1(1+n), wherein n is 0 or positive integer of not more than 30, wherein X1(n) represents bit values of the N-th shift register, wherein N is a positive integer, wherein X1(31) equals to X1(3)+X1(0), wherein X1(1600+n) represents bit values obtained by shifting bit values constituting a 31-bit shift register to right 1600 times.