A method of scrambling a physical broadcast channel, PBCH, the method comprising: initializing, based on a cell identifier of a base station, a scrambling sequence generator; determining a plurality of synchronization signal, SS, blocks in eight consecutive radio frames, wherein each SS block comprises a PBCH, and wherein each radio frame in the eight consecutive radio frames has a duration of 10 ms; generating, by using the scrambling sequence generator, a scrambling sequence to scramble each PBCH within the eight consecutive radio frames, wherein the scrambling sequence comprises four different sequence parts; scrambling PBCHs in a first 20ms of the eight consecutive radio frames by applying a first one of the four different sequence part; scrambling PBCHs in a second 20ms of the eight consecutive radio frames by applying a second one of the four different sequence part; scrambling PBCHs in a third 20ms of the eight consecutive radio frames by applying a third one of the four different sequence part; and scrambling PBCHs in a fourth 20ms of the eight consecutive radio frames by applying a fourth one of the four different sequence part; and performing, based on second and third least significant bits of an SS block index, a second scrambling on the PBCHs in one of the first 20 ms, the second 20ms, the third 20 ms, and the fourth 20 ms. initializing, based on a cell identifier of a base station, a scrambling sequence generator; determining a plurality of synchronization signal, SS, blocks in eight consecutive radio frames, wherein each SS block comprises a PBCH, and wherein each radio frame in the eight consecutive radio frames has a duration of 10 ms; generating, by using the scrambling sequence generator, a scrambling sequence to scramble each PBCH within the eight consecutive radio frames, wherein the scrambling sequence comprises four different sequence parts; scrambling PBCHs in a first 20ms of the eight consecutive radio frames by applying a first one of the four different sequence part; scrambling PBCHs in a second 20ms of the eight consecutive radio frames by applying a second one of the four different sequence part; scrambling PBCHs in a third 20ms of the eight consecutive radio frames by applying a third one of the four different sequence part; and scrambling PBCHs in a fourth 20ms of the eight consecutive radio frames by applying a fourth one of the four different sequence part; and performing, based on second and third least significant bits of an SS block index, a second scrambling on the PBCHs in one of the first 20 ms, the second 20ms, the third 20 ms, and the fourth 20 ms. scrambling PBCHs in a first 20ms of the eight consecutive radio frames by applying a first one of the four different sequence part; scrambling PBCHs in a second 20ms of the eight consecutive radio frames by applying a second one of the four different sequence part; scrambling PBCHs in a third 20ms of the eight consecutive radio frames by applying a third one of the four different sequence part; and scrambling PBCHs in a fourth 20ms of the eight consecutive radio frames by applying a fourth one of the four different sequence part; and performing, based on second and third least significant bits of an SS block index, a second scrambling on the PBCHs in one of the first 20 ms, the second 20ms, the third 20 ms, and the fourth 20 ms. <EOS>