A method for processing a bit sequence, performed by a device in a wireless communication network, comprising: obtaining downlink control information, DCI; performing cyclic redundancy check, CRC, on the DCI, to obtain bit sequence, wherein the bit sequence comprises: M first bits and N second bits, wherein the M first bits and the N second bits are CRC bits, wherein M and N are positive integer; scrambling the M first bits with a first scrambling sequence to obtain a first scrambled sequence, wherein the first scrambling sequence is determined based on a first configuration information, characterised in that : the first scrambling sequence consists of M bits of a radio network temporary identifier, RNTI, configured for a user terminal; scrambling the N second bits with a second scrambling sequence to obtain a second scrambled sequence, wherein the second scrambling sequence is determined based on a second configuration information and the second scrambling sequence consists of N bits of an antenna port configured for the user terminal; generating a to-be-encoded sequence whose length is B according to the first scrambled sequence and the second scrambled sequence, wherein the to-be-encoded sequence comprises: the DCI, the first scrambled sequence and the second scrambled sequence, and wherein the first scrambled sequence is located after the second scrambled sequence, the DCI is located before the second scrambled sequence, and B is a positive integer; encoding the to-be-encoded sequence, to obtain an encoded sequence for transmission. obtaining downlink control information, DCI; performing cyclic redundancy check, CRC, on the DCI, to obtain bit sequence, wherein the bit sequence comprises: M first bits and N second bits, wherein the M first bits and the N second bits are CRC bits, wherein M and N are positive integer; scrambling the M first bits with a first scrambling sequence to obtain a first scrambled sequence, wherein the first scrambling sequence is determined based on a first configuration information, characterised in that : the first scrambling sequence consists of M bits of a radio network temporary identifier, RNTI, configured for a user terminal; scrambling the N second bits with a second scrambling sequence to obtain a second scrambled sequence, wherein the second scrambling sequence is determined based on a second configuration information and the second scrambling sequence consists of N bits of an antenna port configured for the user terminal; generating a to-be-encoded sequence whose length is B according to the first scrambled sequence and the second scrambled sequence, wherein the to-be-encoded sequence comprises: the DCI, the first scrambled sequence and the second scrambled sequence, and wherein the first scrambled sequence is located after the second scrambled sequence, the DCI is located before the second scrambled sequence, and B is a positive integer; encoding the to-be-encoded sequence, to obtain an encoded sequence for transmission. the first scrambling sequence consists of M bits of a radio network temporary identifier, RNTI, configured for a user terminal; scrambling the N second bits with a second scrambling sequence to obtain a second scrambled sequence, wherein the second scrambling sequence is determined based on a second configuration information and the second scrambling sequence consists of N bits of an antenna port configured for the user terminal; generating a to-be-encoded sequence whose length is B according to the first scrambled sequence and the second scrambled sequence, wherein the to-be-encoded sequence comprises: the DCI, the first scrambled sequence and the second scrambled sequence, and wherein the first scrambled sequence is located after the second scrambled sequence, the DCI is located before the second scrambled sequence, and B is a positive integer; encoding the to-be-encoded sequence, to obtain an encoded sequence for transmission. <EOS>