A wireless user device comprising: one or more processors; and a memory storing instructions that, when executed by the one or more processors, cause the wireless user device to: receive, from a base station, a plurality of synchronization signal, SS, blocks in eight consecutive radio frames, wherein each SS block, of the plurality of SS blocks, comprises a physical broadcast channel, PBCH, and wherein each radio frame, of the eight consecutive radio frames, has a duration of 10 ms; perform a first descrambling by: descrambling, based on a first sequence part of four different sequence parts of a first sequence, physical broadcast channels, PBCHs, in first two consecutive radio frames of the eight consecutive radio frames; descrambling, based on a second sequence part of the four different sequence parts of the first sequence, PBCHs in second two consecutive radio frames of the eight consecutive radio frames; descrambling, based on a third sequence part of the four different sequence parts of the first sequence, PBCHs in third two consecutive radio frames of the eight consecutive radio frames; and descrambling, based on a fourth sequence part of the four different sequence parts of the first sequence, PBCHs in fourth two consecutive radio frames of the eight consecutive radio frames; receive a first PBCH demodulation reference signal, DMRS, associated with two bits of a first SS block index; and perform, based on the two bits of the first SS block index, a second descrambling on at least one PBCH in the first two consecutive radio frames, wherein the at least one PBCH, in the first two consecutive radio frames, is associated with the first PBCH DMRS. one or more processors; and a memory storing instructions that, when executed by the one or more processors, cause the wireless user device to: receive, from a base station, a plurality of synchronization signal, SS, blocks in eight consecutive radio frames, wherein each SS block, of the plurality of SS blocks, comprises a physical broadcast channel, PBCH, and wherein each radio frame, of the eight consecutive radio frames, has a duration of 10 ms; perform a first descrambling by: descrambling, based on a first sequence part of four different sequence parts of a first sequence, physical broadcast channels, PBCHs, in first two consecutive radio frames of the eight consecutive radio frames; descrambling, based on a second sequence part of the four different sequence parts of the first sequence, PBCHs in second two consecutive radio frames of the eight consecutive radio frames; descrambling, based on a third sequence part of the four different sequence parts of the first sequence, PBCHs in third two consecutive radio frames of the eight consecutive radio frames; and descrambling, based on a fourth sequence part of the four different sequence parts of the first sequence, PBCHs in fourth two consecutive radio frames of the eight consecutive radio frames; receive a first PBCH demodulation reference signal, DMRS, associated with two bits of a first SS block index; and perform, based on the two bits of the first SS block index, a second descrambling on at least one PBCH in the first two consecutive radio frames, wherein the at least one PBCH, in the first two consecutive radio frames, is associated with the first PBCH DMRS. receive, from a base station, a plurality of synchronization signal, SS, blocks in eight consecutive radio frames, wherein each SS block, of the plurality of SS blocks, comprises a physical broadcast channel, PBCH, and wherein each radio frame, of the eight consecutive radio frames, has a duration of 10 ms; perform a first descrambling by: descrambling, based on a first sequence part of four different sequence parts of a first sequence, physical broadcast channels, PBCHs, in first two consecutive radio frames of the eight consecutive radio frames; descrambling, based on a second sequence part of the four different sequence parts of the first sequence, PBCHs in second two consecutive radio frames of the eight consecutive radio frames; descrambling, based on a third sequence part of the four different sequence parts of the first sequence, PBCHs in third two consecutive radio frames of the eight consecutive radio frames; and descrambling, based on a fourth sequence part of the four different sequence parts of the first sequence, PBCHs in fourth two consecutive radio frames of the eight consecutive radio frames; descrambling, based on a first sequence part of four different sequence parts of a first sequence, physical broadcast channels, PBCHs, in first two consecutive radio frames of the eight consecutive radio frames; descrambling, based on a second sequence part of the four different sequence parts of the first sequence, PBCHs in second two consecutive radio frames of the eight consecutive radio frames; descrambling, based on a third sequence part of the four different sequence parts of the first sequence, PBCHs in third two consecutive radio frames of the eight consecutive radio frames; and descrambling, based on a fourth sequence part of the four different sequence parts of the first sequence, PBCHs in fourth two consecutive radio frames of the eight consecutive radio frames; receive a first PBCH demodulation reference signal, DMRS, associated with two bits of a first SS block index; and perform, based on the two bits of the first SS block index, a second descrambling on at least one PBCH in the first two consecutive radio frames, wherein the at least one PBCH, in the first two consecutive radio frames, is associated with the first PBCH DMRS.