A base station comprising: a transceiver; and a controller configured to: acquire a first part of a physical broadcast channel, PBCH, payload, the first part of the PBCH payload including most significant bits, MSBs, of 10-bits system frame number, SFN, acquire a second part of the PBCH payload, the second part of the PBCH payload including least significant bits, LSBs, of the 10-bits SFN, perform channel coding based on the PBCH payload, by a polar code, and transmit, via the transceiver, a primary synchronization signal, PSS, a secondary synchronization signal, SSS, and the channel coded PBCH payload, wherein the PSS is transmitted on an orthogonal frequency division multiplexing, OFDM, symbol for the PSS in one SS block, wherein the SSS is transmitted on an OFDM symbol for the SSS in the one SS block, wherein the channel coded PBCH payload is transmitted on an OFDM symbol for the PBCH payload in the one SS block, wherein the OFDM symbol for the PSS is perfectly separated with the OFDM symbol for the SSS and the OFDM symbol for the PBCH payload in the one SS block, wherein the OFDM symbol for the PSS is located prior to the OFDM symbol for the SSS and the OFDM symbol for the PBCH payload in the one SS block, and wherein the SSS and the channel coded PBCH payload are transmitted based on same antenna port and a number of the same antenna port is fixed. a transceiver; and a controller configured to: acquire a first part of a physical broadcast channel, PBCH, payload, the first part of the PBCH payload including most significant bits, MSBs, of 10-bits system frame number, SFN, acquire a second part of the PBCH payload, the second part of the PBCH payload including least significant bits, LSBs, of the 10-bits SFN, perform channel coding based on the PBCH payload, by a polar code, and transmit, via the transceiver, a primary synchronization signal, PSS, a secondary synchronization signal, SSS, and the channel coded PBCH payload, wherein the PSS is transmitted on an orthogonal frequency division multiplexing, OFDM, symbol for the PSS in one SS block, wherein the SSS is transmitted on an OFDM symbol for the SSS in the one SS block, wherein the channel coded PBCH payload is transmitted on an OFDM symbol for the PBCH payload in the one SS block, wherein the OFDM symbol for the PSS is perfectly separated with the OFDM symbol for the SSS and the OFDM symbol for the PBCH payload in the one SS block, wherein the OFDM symbol for the PSS is located prior to the OFDM symbol for the SSS and the OFDM symbol for the PBCH payload in the one SS block, and wherein the SSS and the channel coded PBCH payload are transmitted based on same antenna port and a number of the same antenna port is fixed. acquire a first part of a physical broadcast channel, PBCH, payload, the first part of the PBCH payload including most significant bits, MSBs, of 10-bits system frame number, SFN, acquire a second part of the PBCH payload, the second part of the PBCH payload including least significant bits, LSBs, of the 10-bits SFN, perform channel coding based on the PBCH payload, by a polar code, and transmit, via the transceiver, a primary synchronization signal, PSS, a secondary synchronization signal, SSS, and the channel coded PBCH payload, wherein the PSS is transmitted on an orthogonal frequency division multiplexing, OFDM, symbol for the PSS in one SS block, wherein the SSS is transmitted on an OFDM symbol for the SSS in the one SS block, wherein the channel coded PBCH payload is transmitted on an OFDM symbol for the PBCH payload in the one SS block, wherein the OFDM symbol for the PSS is perfectly separated with the OFDM symbol for the SSS and the OFDM symbol for the PBCH payload in the one SS block, wherein the OFDM symbol for the PSS is located prior to the OFDM symbol for the SSS and the OFDM symbol for the PBCH payload in the one SS block, and wherein the SSS and the channel coded PBCH payload are transmitted based on same antenna port and a number of the same antenna port is fixed.