CN111865856B

CN111865856B - Signal sending and receiving method and terminal

Info

Publication number: CN111865856B
Application number: CN201910355848.9A
Authority: CN
Inventors: 任晓涛; 赵锐
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2019-04-29
Filing date: 2019-04-29
Publication date: 2022-07-19
Anticipated expiration: 2039-04-29
Also published as: CN111865856A

Abstract

The invention discloses a method and a terminal for sending and receiving signals, wherein the method for sending the signals comprises the following steps: in the time slot, sending a synchronization signal block SSB; the SSB comprises a primary synchronization signal PSS, a secondary synchronization signal SSS and a physical broadcast channel PBCH, wherein the PSS occupies two orthogonal frequency division multiplexing OFDM symbol transmissions, the SSS occupies two OFDM symbol transmissions, the pattern of the SSB used by the time slot where the SSB is located under the condition that a normal cyclic prefix CP is configured is a first SSB pattern, the pattern of the SSB used by the time slot where the SSB is located under the condition that an extended cyclic prefix CP is configured is a second SSB pattern, and the first SSB pattern is the same as the second SSB pattern. The scheme of the invention can avoid intersymbol interference caused by multipath time delay, thereby improving the detection success rate of the PSS and SSS sequences, improving the decoding success rate of the PSBCH of the receiving side terminal and further ensuring the requirement of the coverage radius of NR V2X.

Description

Signal sending and receiving method and terminal

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a method and a terminal for transmitting and receiving a signal.

Background

In a 5G NR (NR Radio Access, new Radio Access technology) V2X system, terminals use a PC5 port (Sidelink) for direct communication with each other. Before the service data transmission, synchronization is established between two terminals which need to communicate first at port PC5 (Sidelink). The method for establishing synchronization is that one terminal A sends synchronization and broadcast signals, the other terminal B receives the synchronization and broadcast signals sent by the terminal A, once the terminal B receives and demodulates the signals successfully, the two terminals can establish synchronization, and preparation is made for the next step of direct communication.

When NR V2X Sidelink is used to transmit synchronization information, SSB (synchronization signal block) beam scanning is required, and SSB on the Sidelink is called S-SSB. The SSB pattern includes a Sidelink primary synchronization signal S-PSS, a Sidelink secondary synchronization signal S-SSS, and a Sidelink broadcast channel PSBCH. To reduce complexity, the transmission of the S-SSB may not take the form of beam scanning, but instead may transmit an omni-directional beam once or repeat the same beam multiple times.

In the LTE V2X system, because the coverage radius required by the PC5 port is only 300 meters, the subcarrier interval of LTE is 15KHz, and the corresponding conventional CP (cyclic prefix) length is 4.7 microseconds, the conventional CP length supporting LTE can meet the system coverage requirement. However, for NR V2X, because various sub-carrier spacings SCS are required to be supported, including 15KHz, 30KHz, 60KHz, etc., for the 60KHz sub-carrier spacing, the conventional CP length becomes 1/4 of 15KHz, and considering factors such as delay spread, the supported coverage radius does not meet the requirement.

Disclosure of Invention

The embodiment of the invention provides a signal sending and receiving method and a terminal, when the space of a Sidelink communication subcarrier is larger, the S-SSB pattern under an extended CP is used, so that the inter-symbol crosstalk caused by multipath time delay is avoided, the detection success rate of a PSS and SSS sequence is improved, the decoding success rate of a PSBCH of the terminal at the receiving side is also improved, and the requirement of the coverage radius of NR V2X is further ensured.

In order to solve the above technical problem, embodiments of the present invention provide the following technical solutions:

a signal transmission method is applied to a terminal, and comprises the following steps:

in the time slot, sending a synchronous signal block SSB; the SSB comprises a primary synchronization signal PSS, a secondary synchronization signal SSS and a physical broadcast channel PBCH, wherein the PSS occupies two orthogonal frequency division multiplexing OFDM symbol transmissions, the SSS occupies two OFDM symbol transmissions, the pattern of the SSB used by the time slot where the SSB is located under the condition that a normal cyclic prefix CP is configured is a first SSB pattern, the pattern of the SSB used by the time slot where the SSB is located under the condition that an extended cyclic prefix CP is configured is a second SSB pattern, and the first SSB pattern is the same as the second SSB pattern.

Preferably, one said SSB occupies at most 11 OFDM symbol transmissions.

Preferably, there is at least one OFDM symbol between two OFDM symbols occupied by the SSS, and the at least one OFDM symbol transmits other signals except for the SSS signal.

Preferably, the PBCH occupies at least 4 OFDM symbol transmissions, and the at least 4 OFDM symbols are continuous or discontinuous.

Preferably, when at least 4 OFDM symbols occupied by the PBCH are discontinuous, a first OFDM symbol of the at least 4 OFDM symbols is used as an automatic gain control AGC.

Preferably, under the CP-OFDM waveform, the SSB further includes a DMRS, wherein an OFDM symbol occupied by the DMRS in the time domain is the same as an OFDM symbol occupied by the PBCH in the time domain, and subcarriers occupied by the DMRS in the frequency domain and subcarriers occupied by the PBCH in the frequency domain are arranged at intervals.

Preferably, under the waveform of cyclic prefix-orthogonal frequency division multiplexing CP-OFDM or orthogonal frequency division multiplexing multiple access DFT-s-OFDM of discrete Fourier transform spread spectrum, the OFDM symbol where the PBCH is located does not include a demodulation pilot reference signal (DMRS).

Preferably, under the DFT-s-OFDM waveform of OFDM spread by DFT, the SSB further comprises a DMRS, wherein OFDM symbols occupied by the DMRS in the time domain are spaced apart from OFDM symbols occupied by the PBCH in the time domain, and subcarriers occupied by the DMRS in the frequency domain are the same as subcarriers occupied by the PBCH in the frequency domain.

Preferably, the SSB is a direct link synchronization signal block S-SSB, the PSS is a direct link primary synchronization signal S-PSS, the SSS is a direct link secondary synchronization signal S-SSS, and the PBCH is a direct link physical broadcast channel PSBCH.

The embodiment of the invention also provides a signal receiving method which is applied to a terminal and comprises the following steps:

in a time slot, receiving a synchronization signal block SSB; the SSB comprises a primary synchronization signal PSS, a secondary synchronization signal SSS and a physical broadcast channel PBCH, wherein the PSS occupies two orthogonal frequency division multiplexing OFDM symbol transmissions, the SSS occupies two OFDM symbol transmissions, the pattern of the SSB used by the time slot where the SSB is located under the condition that a normal cyclic prefix CP is configured is a first SSB pattern, the pattern of the SSB used by the time slot where the SSB is located under the condition that an extended cyclic prefix CP is configured is a second SSB pattern, and the first SSB pattern is the same as the second SSB pattern.

Preferably, one said SSB occupies at most 11 orthogonal frequency division multiplexing, OFDM, symbol transmissions.

Preferably, under a CP-OFDM waveform, the SSB further includes a DMRS, the OFDM symbol occupied by the DMRS in the time domain is the same as the OFDM symbol occupied by the PBCH in the time domain, subcarriers occupied by the DMRS in the frequency domain and subcarriers occupied by the PBCH in the frequency domain are arranged at intervals, and the terminal performs channel estimation using the DMRS and SSS to obtain a channel estimation value, and performs decoding of the PBCH using the channel estimation value.

Preferably, under the waveform of cyclic prefix-orthogonal frequency division multiplexing CP-OFDM or orthogonal frequency division multiplexing multiple access DFT-s-OFDM spread by discrete fourier transform, the OFDM symbol where PBCH is located does not include demodulation pilot reference signal DMRS, the terminal performs channel estimation using SSS to obtain a channel estimation value, and performs decoding of PBCH using the channel estimation value.

Preferably, under an OFDM-s-OFDM waveform of discrete fourier transform spread spectrum, the SSB further includes a demodulation pilot reference signal DMRS, where OFDM symbols occupied by the DMRS in the time domain and OFDM symbols occupied by the PBCH in the time domain are arranged at intervals, subcarriers occupied by the DMRS in the frequency domain are the same as subcarriers occupied by the PBCH in the frequency domain, and the terminal performs channel estimation using the DMRS and SSS to obtain a channel estimation value, and performs decoding of the PBCH using the channel estimation value.

An embodiment of the present invention further provides a terminal, including: a processor, a transceiver, and a memory, wherein the memory stores a program executable by the processor, and the processor implements the following when executing the program: in the time slot, sending a synchronization signal block SSB; the SSB comprises a primary synchronization signal PSS, a secondary synchronization signal SSS and a physical broadcast channel PBCH, wherein the PSS occupies two orthogonal frequency division multiplexing OFDM symbol transmissions, the SSS occupies two OFDM symbol transmissions, the pattern of the SSB used by the time slot where the SSB is located under the condition that a normal cyclic prefix CP is configured is a first SSB pattern, the pattern of the SSB used by the time slot where the SSB is located under the condition that an extended cyclic prefix CP is configured is a second SSB pattern, and the first SSB pattern is the same as the second SSB pattern.

Preferably, one said SSB occupies at most 11 OFDM symbol transmissions; at least one OFDM symbol is arranged between two OFDM symbols occupied by the SSS, and the at least one OFDM symbol transmits other signals except the SSS signals; the PBCH occupies at least 4 OFDM symbol transmissions; the at least 4 OFDM symbols are continuous or discontinuous.

Preferably, under the cyclic prefix-orthogonal frequency division multiplexing CP-OFDM or the orthogonal frequency division multiplexing multiple access DFT-s-OFDM waveform of discrete fourier transform spread spectrum, the OFDM symbol on which the PBCH is located does not include the demodulation pilot reference signal DMRS.

An embodiment of the present invention further provides a signal transmitting apparatus, including:

the receiving and sending module is used for sending a synchronous signal block SSB in a time slot; the SSB comprises a primary synchronization signal PSS, a secondary synchronization signal SSS and a physical broadcast channel PBCH, wherein the PSS occupies two OFDM symbol transmissions, the SSS occupies two OFDM symbol transmissions, the pattern of the SSB used by the time slot where the SSB is located under the condition that a conventional cyclic prefix CP is configured is a first SSB pattern, the pattern of the SSB used by the time slot where the SSB is located under the condition that an extended cyclic prefix CP is configured is a second SSB pattern, and the first SSB pattern is the same as the second SSB pattern.

An embodiment of the present invention further provides a terminal, including: a processor, a transceiver, and a memory, wherein a program executable by the processor is stored on the memory, and when the processor executes the program, the processor implements: receiving a synchronization signal block SSB in a time slot; the SSB comprises a primary synchronization signal PSS, a secondary synchronization signal SSS and a physical broadcast channel PBCH, wherein the PSS occupies two orthogonal frequency division multiplexing OFDM symbol transmissions, the SSS occupies two OFDM symbol transmissions, the pattern of the SSB used by the time slot where the SSB is located under the condition that a normal cyclic prefix CP is configured is a first SSB pattern, the pattern of the SSB used by the time slot where the SSB is located under the condition that an extended cyclic prefix CP is configured is a second SSB pattern, and the first SSB pattern is the same as the second SSB pattern.

Preferably, one said SSB occupies at most 11 OFDM symbol transmissions; at least one OFDM symbol is arranged between two OFDM symbols occupied by the SSS, and the at least one OFDM symbol transmits other signals except the SSS signals; the PBCH occupies at least 4 OFDM symbol transmissions, the at least 4 OFDM symbols being either contiguous or non-contiguous.

Preferably, under the cyclic prefix-orthogonal frequency division multiplexing CP-OFDM waveform, the SSB further includes a DMRS, where an OFDM symbol occupied by the DMRS in the time domain is the same as an OFDM symbol occupied by the PBCH in the time domain, subcarriers occupied by the DMRS in the frequency domain and subcarriers occupied by the PBCH in the frequency domain are arranged at intervals, and the terminal performs channel estimation using the DMRS and the SSS to obtain a channel estimation value, and performs decoding of the PBCH using the channel estimation value.

An embodiment of the present invention further provides a signal receiving apparatus, including:

a transceiver module, configured to receive a synchronization signal block SSB in a timeslot; the SSB comprises a primary synchronization signal PSS, a secondary synchronization signal SSS and a physical broadcast channel PBCH, wherein the PSS occupies two orthogonal frequency division multiplexing OFDM symbol transmissions, the SSS occupies two OFDM symbol transmissions, the pattern of the SSB used by the time slot where the SSB is located under the condition that a normal cyclic prefix CP is configured is a first SSB pattern, the pattern of the SSB used by the time slot where the SSB is located under the condition that an extended cyclic prefix CP is configured is a second SSB pattern, and the first SSB pattern is the same as the second SSB pattern.

Embodiments of the present invention also provide a computer storage medium including instructions that, when executed on a computer, cause the computer to perform the method as described above.

The embodiment of the invention has the beneficial effects that:

in the above embodiment of the present invention, the synchronization signal block SSB is transmitted in the time slot; the SSB comprises a primary synchronization signal PSS, a secondary synchronization signal SSS and a physical broadcast channel PBCH, wherein the PSS occupies two OFDM symbol transmissions, the SSS occupies two OFDM symbol transmissions, the pattern of the SSB used by the time slot where the SSB is located under the condition that a conventional cyclic prefix CP is configured is a first SSB pattern, the pattern of the SSB used by the time slot where the SSB is located under the condition that an extended cyclic prefix CP is configured is a second SSB pattern, and the first SSB pattern is the same as the second SSB pattern. Preferably, one said SSB occupies at most 11 OFDM symbol transmissions. When the Sidelink communication subcarrier interval is larger, the S-SSB pattern under the extended CP is used, so that the intersymbol interference caused by multipath time delay is avoided, the detection success rate of the PSS and SSS sequences is improved, the decoding success rate performance of the PSBCH (broadcast signal channel) of the direct link is also improved, and the requirement on the coverage radius of NR V2X is further ensured.

Drawings

FIG. 1 is a schematic diagram of a 5G NR synchronization signal block design;

fig. 2 is a flowchart of a signal transmission method according to an embodiment of the present invention;

fig. 3 to 14 are schematic diagrams illustrating the design schemes of the transmission patterns of the synchronization signal blocks according to the embodiment of the present invention;

fig. 15 is a flowchart of a signal receiving method according to an embodiment of the present invention;

fig. 16 is a schematic diagram of a terminal according to the present invention.

Detailed Description

Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

As shown in fig. 1, for the V2X scellink synchronization broadcast information design diagram, before the UE is ready to perform service transmission on scellink, it needs to synchronize on scellink first, and in order to expand the coverage of the synchronization signal, it needs to perform time domain repetition of P-SSS/S-SSS signal to enhance the detection performance of the synchronization signal.

As shown in fig. 1, the abscissa is the time domain, and each column represents one OFDM symbol. The ordinate is the frequency domain, which in the figure is 6 RB. One Slot accommodates a synchronization broadcast block (SSB) including P-SSS signals, S-SSS signals, PSBCH signals, and necessary DMRS signals.

As shown in fig. 2, an embodiment of the present invention provides a signal sending method, applied to a terminal, where the method includes:

step 21, in the time slot, sending a synchronous signal block SSB; the SSB comprises a primary synchronization signal PSS, a secondary synchronization signal SSS and a physical broadcast channel PBCH, wherein the PSS occupies two orthogonal frequency division multiplexing OFDM symbol transmissions, the SSS occupies two OFDM symbol transmissions, the pattern of the SSB used by the time slot where the SSB is located under the condition that a normal cyclic prefix CP is configured is a first SSB pattern, the pattern of the SSB used by the time slot where the SSB is located under the condition that an extended cyclic prefix CP is configured is a second SSB pattern, and the first SSB pattern is the same as the second SSB pattern.

Preferably, one said SSB occupies at most 11 OFDM symbol transmissions. Preferably, the SSB is a direct link synchronization signal block S-SSB, the PSS is a direct link primary synchronization signal S-PSS, the SSS is a direct link secondary synchronization signal S-SSS, and the PBCH is a direct link physical broadcast channel PSBCH.

In the above embodiment of the present invention, the pattern of the S-SSB is the same in both the normal CP (Cyclic Prefix) and the extended CP, and the S-SSB occupies at most 11 OFDM symbols for transmission, and the S-SSB occupies two OFDM symbols for transmission of the S-PSS and simultaneously occupies two OFDM symbols for transmission of the S-SSS. Used in the sildelink direct link communication of NR V2X. When the Sidelink communication subcarrier interval is larger, the S-SSB pattern under the extended CP is used, so that the intersymbol interference caused by multipath delay is avoided, the detection success rate of the PSS and SSS sequences is improved, the decoding success rate of the PSBCH of a receiving side terminal is also improved, and the requirement of the coverage radius of NR V2X is further ensured

In the above embodiments of the present invention, there is at least one OFDM symbol between two OFDM symbols occupied by the SSS, where the at least one OFDM symbol transmits signals other than the SSS signal, and there is at least one OFDM symbol between two OFDM symbols occupied by the same S-SSS, where the at least one OFDM symbol transmits signals other than the S-SSS signal.

The PBCH occupies at least 4 OFDM symbol transmissions, the at least 4 OFDM symbols being continuous or discontinuous. And when at least 4 OFDM symbols occupied by the PBCH are discontinuous, using the first OFDM symbol in the at least 4 OFDM symbols as Automatic Gain Control (AGC). Likewise, the PSBCH occupies at least 4 OFDM symbol transmissions, said at least 4 OFDM symbols being continuous or discontinuous. When at least 4 OFDM symbols occupied by the PSBCH are discontinuous, the first OFDM symbol of the at least 4 OFDM symbols is used as AGC (automatic gain control).

In one implementation of the foregoing embodiment of the present invention, under a CP-OFDM (cyclic prefix-orthogonal frequency division multiplexing) waveform, the SSB further includes a demodulation pilot reference signal DMRS, where an OFDM symbol occupied by the DMRS in a time domain is the same as an OFDM symbol occupied by the PBCH in the time domain, and subcarriers occupied by the DMRS in a frequency domain are arranged at intervals with subcarriers occupied by the PBCH in the frequency domain. Similarly, the OFDM symbols occupied by the DMRS in the time domain are the same as the OFDM symbols occupied by the PSBCH in the time domain, and the DMRS and the PSBCH are arranged at intervals in the frequency domain.

As shown in fig. 3, under a CP-OFDM waveform, a time slot of an extended CP includes an S-SSB, S-PSS is located at symbols #1 and #2, S-SSS is located at symbols #3 and #4, a PSBCH is located at symbols #5 to #10, the symbol on which the PSBCH is located includes a comb-embedded DMRS, and a receiving-side terminal uses the DMRS and the S-SSS for channel estimation and uses the channel estimation value for decoding the PSBCH.

This embodiment employs an extended CP to transmit the S-SSB, and both S-PSS and S-SSS occupy two symbol transmissions. The use of extended CP may guarantee the coverage requirements of NR V2X.

As shown in fig. 4, under a CP-OFDM waveform, an extended CP slot includes one S-SSB, where S-PSS is located in symbols #1 and #2, S-SSS is located in symbols #3 and #10, and PSBCH is located in symbols #4 to #9, where the PSBCH includes a comb-embedded DMRS, and a receiving-side terminal uses the DMRS and the S-SSS for channel estimation and uses the channel estimation value for decoding the PSBCH.

This embodiment employs an extended CP to transmit the S-SSB, and both S-PSS and S-SSS occupy two symbol transmissions. The use of extended CP may guarantee the coverage requirements of NR V2X. And 6 symbols are spaced between two S-SSS symbols, so that the performance of frequency offset estimation is better.

As shown in fig. 5, under a CP-OFDM waveform, an extended CP slot includes one S-SSB, where S-PSS is located in symbols #2 and #3, S-SSS is located in symbols #1 and #4, and PSBCH is located in symbols #5 to #10, where the PSBCH includes a comb-embedded DMRS, and a receiving-side terminal uses the DMRS and the S-SSS for channel estimation and uses the channel estimation value for decoding the PSBCH.

This embodiment employs an extended CP to transmit the S-SSB, and both S-PSS and S-SSS occupy two symbol transmissions. The use of extended CP can guarantee the coverage requirement of NR V2X. And 2 symbols are spaced between two S-SSS symbols, so that the performance of frequency offset estimation is better.

As shown in fig. 6, under a CP-OFDM waveform, a time slot of an extended CP includes one S-SSB, S-PSS is located at symbols #1 and #10, S-SSS is located at symbols #2 and #3, a PSBCH is located at symbols #4 to #9, the symbol on which the PSBCH is located includes a comb-embedded DMRS, and a receiving-side terminal uses the DMRS and the S-SSS for channel estimation and uses the channel estimation value for decoding the PSBCH.

This embodiment employs an extended CP to transmit the S-SSB, and both S-PSS and S-SSS occupy two symbol transmissions. The use of extended CP may guarantee the coverage requirements of NR V2X. And 8 symbols are spaced between two S-SSS symbols, so that the performance of frequency offset estimation is better.

As shown in fig. 7, under a CP-OFDM waveform, an extended CP slot includes one S-SSB, S-PSS is located in symbols #1 and #2, S-SSS is located in symbols #3 and #4, PSBCH is located in symbol 0, and symbols #5 to #10, the PSBCH includes a DMRS embedded in a comb shape on the symbol, and a receiving-side terminal uses the DMRS and the S-SSS for channel estimation and uses the channel estimation value for decoding the PSBCH.

This embodiment employs an extended CP to transmit S-SSB, and both S-PSS and S-SSS occupy two symbol transmissions. The use of extended CP may guarantee the coverage requirements of NR V2X. And the symbol #0 adopts the PSBCH as AGC, so that the code rate of the PSBCH is reduced, and the decoding performance of the PSBCH is improved.

As shown in fig. 8, under the CP-OFDM waveform, an extended CP slot includes one S-SSB, S-PSS is located in symbols #1 and #2, S-SSS is located in symbols #3 and #10, PSBCH is located in symbol 0, and symbols #4 to #9, the PSBCH includes DMRS embedded in a comb shape on the symbol, and the receiving-side terminal uses the DMRS and the S-SSS for channel estimation and uses the channel estimation value for decoding the PSBCH.

This embodiment employs an extended CP to transmit the S-SSB, and both S-PSS and S-SSS occupy two symbol transmissions. The use of extended CP may guarantee the coverage requirements of NR V2X. And the symbol #0 adopts the PSBCH as AGC, so that the code rate of the PSBCH is reduced, and the decoding performance of the PSBCH is improved. And 6 symbols are spaced between two S-SSS symbols, so that the performance of frequency offset estimation is better.

As shown in fig. 9, under a CP-OFDM waveform, an extended CP slot includes one S-SSB, S-PSS is located in symbols #2 and #3, S-SSS is located in symbols #1 and #4, PSBCH is located in symbol 0, and symbols #5 to #10, the PSBCH includes a DMRS embedded in a comb shape on the symbol, and a receiving-side terminal uses the DMRS and the S-SSS for channel estimation and uses the channel estimation value for decoding the PSBCH.

This embodiment employs an extended CP to transmit the S-SSB, and both S-PSS and S-SSS occupy two symbol transmissions. The use of extended CP may guarantee the coverage requirements of NR V2X. And the symbol #0 adopts the PSBCH as AGC, so that the code rate of the PSBCH is reduced, and the decoding performance of the PSBCH is improved. And 2 symbols are spaced between two S-SSS symbols, so that the performance of frequency offset estimation is better. The disadvantages are that S-PSS and S-SSS occupy two symbols and the resource overhead is large.

As shown in fig. 10, under a CP-OFDM waveform, an extended CP slot includes one S-SSB, S-PSS is located in symbols #2 and #3, S-SSS is located in symbols #1 and #10, PSBCH is located in symbol 0, and symbols #4 to #9, the PSBCH includes a DMRS embedded in a comb shape on the symbol, and a receiving-side terminal uses the DMRS and the S-SSS for channel estimation and uses the channel estimation value for decoding the PSBCH.

This embodiment employs an extended CP to transmit the S-SSB, and both S-PSS and S-SSS occupy two symbol transmissions. The use of extended CP can guarantee the coverage requirement of NR V2X. And the symbol #0 adopts the PSBCH as AGC, so that the code rate of the PSBCH is reduced, and the decoding performance of the PSBCH is improved. And 8 symbols are spaced between two S-SSS symbols, so that the performance of frequency offset estimation is better. The disadvantages are that S-PSS and S-SSS occupy two symbols and the resource overhead is large.

In another implementation of the embodiment of the present invention, in a CP-OFDM (cyclic prefix-orthogonal frequency division multiplexing) or DFT-s-OFDM (discrete fourier transform spread orthogonal frequency division multiplexing multiple access) waveform, the OFDM symbol where the PBCH is located does not include a demodulation pilot reference signal DMRS. Similarly, the OFDM symbol on which the PSBCH is located does not include the demodulation pilot reference signal DMRS.

As shown in fig. 11, under a CP-OFDM waveform or DFT-S-OFDM waveform, a slot of an extended CP includes one S-SSB, S-PSS is located at symbols #1 and #2, S-SSS is located at symbols #3 and #10, PSBCH is located at symbols #4 to #9, the PSBCH includes no DMRS, and a receiving-side terminal uses the S-SSS for channel estimation and uses the channel estimation value for decoding the PSBCH. And the S-SSS on the two symbols repeatedly transmitted is spaced 6 symbols apart in the time domain.

In the embodiment, the S-PSS and the S-SSS both occupy two symbols for transmission, and the two symbols for transmitting the S-SSS are separated by 6 symbols in the time domain, and the two S-SSS separated by 6 symbols in the time domain can bring the performance of frequency offset estimation to be improved, thereby improving the reduction of decoding BLER of the PSBCH. In addition, since the S-SSB pattern does not include any DMRS, it can be applied to both the CP-OFDM waveform and the DFT-S-OFDM waveform.

As shown in FIG. 12, in a CP-OFDM waveform or DFT-S-OFDM waveform, one S-SSB is included in a slot of one extended CP, S-PSS is located at symbols #1 and #2, S-SSS is located at symbols #3 and #7, PSBCH is located at symbols #4 to #6, and symbols #8 and # 10. And the symbol of the PSBCH does not comprise the DMRS, the receiving side terminal uses the S-SSS to carry out channel estimation and uses the channel estimation value to carry out the decoding of the PSBCH. And the S-SSS on the two symbols repeatedly transmitted is spaced by 3 symbols in the time domain.

In the embodiment, the S-PSS and the S-SSS both occupy two symbols for transmission, and the two symbols for transmitting the S-SSS are separated by 3 symbols in the time domain, and the two S-SSS separated by 3 symbols in the time domain can bring the performance of frequency offset estimation to be improved, thereby improving the reduction of decoding BLER of the PSBCH. In addition, since the S-SSB pattern does not include any DMRS, it can be applied to both the CP-OFDM waveform and the DFT-S-OFDM waveform.

In yet another implementation of the embodiment of the present invention, in a DFT-s-OFDM (discrete fourier transform spread spectrum orthogonal frequency division multiplexing multiple access) waveform, the SSB further includes a demodulation pilot reference signal DMRS, where OFDM symbols occupied by the DMRS in a time domain are arranged at intervals from OFDM symbols occupied by the PBCH in the time domain, and subcarriers occupied by the DMRS in the frequency domain are the same as subcarriers occupied by the PBCH in the frequency domain. Likewise, the OFDM symbols occupied by the DMRS in the time domain and the OFDM symbols occupied by the PSBCH in the time domain are arranged at intervals, and the DMRS and the PSBCH are the same in the frequency domain.

As shown in FIG. 13, in a DFT-S-OFDM waveform, one S-SSB is included in a slot of one extended CP, with S-PSS located at symbols #1 and #2, S-SSS located at symbols #3 and #10, PSBCH located at symbols #4 and #6, and symbols #8 and # 10. DMRSs are located in symbols #5 and #7, and the receiving side terminal uses the DMRS and the S-SSS for channel estimation and uses the channel estimation value for decoding the PSBCH. And the S-SSS on the two symbols repeatedly transmitted is spaced 6 symbols apart in the time domain.

In this embodiment, both the S-PSS and the S-SSS occupy two symbols for transmission, and the two symbols for transmitting the S-SSS are spaced by 6 symbols in the time domain, and the two S-SSS spaced by 6 symbols in the time domain may bring about an increase in the frequency offset estimation performance, thereby improving a decrease in the decoding BLER of the PSBCH.

As shown in FIG. 14, in a DFT-S-OFDM waveform, one S-SSB is included in a slot of one extended CP, with S-PSS located at symbols #1 and #2, S-SSS located at symbols #3 and #7, PSBCH located at symbols #4 and #6, and symbols #8 and # 10. DMRSs are located in symbols #5 and #9, and the receiving side terminal uses the DMRS and the S-SSS for channel estimation and uses the channel estimation value for decoding the PSBCH. And the S-SSS on the two symbols repeatedly transmitted is spaced by 3 symbols in the time domain.

In this embodiment, both the S-PSS and the S-SSS occupy two symbols for transmission, and the two symbols for transmitting the S-SSS are spaced by 3 symbols in the time domain, and the two S-SSS spaced by 3 symbols in the time domain may bring about an increase in the frequency offset estimation performance, thereby improving a decrease in the decoding BLER of the PSBCH.

In the above embodiments of the present invention, in fig. 3 to 14, the number of OFDM occupied by PSBCH is only for illustration, and is not limited to the number of OFDM and the layout manner in the figures. When the Sidelink communication subcarrier interval is larger, the S-SSB pattern under the extended CP is used, so that the intersymbol interference caused by multipath delay is avoided, the detection success rate of P-SSS and S-SSS sequences is improved, the decoding success rate of a PSBCH (pseudo-binary broadcast channel) of a receiving side terminal is also improved, and the requirement on the coverage radius of NR V2X is met.

As shown in fig. 15, an embodiment of the present invention further provides a signal receiving method, which is applied to a terminal, and the method includes:

step 151, receiving a synchronization signal block SSB in a time slot; the SSB comprises a primary synchronization signal PSS, a secondary synchronization signal SSS and a physical broadcast channel PBCH, wherein the PSS occupies two orthogonal frequency division multiplexing OFDM symbol transmissions, the SSS occupies two OFDM symbol transmissions, the pattern of the SSB used by the time slot where the SSB is located under the condition that a normal cyclic prefix CP is configured is a first SSB pattern, the pattern of the SSB used by the time slot where the SSB is located under the condition that an extended cyclic prefix CP is configured is a second SSB pattern, and the first SSB pattern is the same as the second SSB pattern.

Preferably, one said SSB occupies at most 11 OFDM symbol transmissions.

Preferably, under the waveform of cyclic prefix-orthogonal frequency division multiplexing CP-OFDM or orthogonal frequency division multiplexing multiple access DFT-s-OFDM of discrete Fourier transform spread spectrum, the OFDM symbol where the PBCH is located does not include a demodulation pilot reference signal (DMRS), the terminal uses SSS to perform channel estimation to obtain a channel estimation value, and uses the channel estimation value to perform PBCH decoding.

It should be noted that the embodiments shown in fig. 3 to 14 are also applicable to the embodiment of the terminal, and the same technical effects can be achieved.

As shown in fig. 16, an embodiment of the present invention further provides a terminal 160, including: a processor 162, a transceiver 161, and a memory 163, wherein the memory 163 stores programs executable by the processor 162, and when the processor 162 executes the programs, the processor 162 implements: in the time slot, sending a synchronous signal block SSB; the SSB comprises a primary synchronization signal PSS, a secondary synchronization signal SSS and a physical broadcast channel PBCH, wherein the PSS occupies two orthogonal frequency division multiplexing OFDM symbol transmissions, the SSS occupies two OFDM symbol transmissions, the pattern of the SSB used by the time slot where the SSB is located under the condition that a normal cyclic prefix CP is configured is a first SSB pattern, the pattern of the SSB used by the time slot where the SSB is located under the condition that an extended cyclic prefix CP is configured is a second SSB pattern, and the first SSB pattern is the same as the second SSB pattern.

Preferably, one said SSB occupies at most 11 OFDM symbol transmissions.

Preferably, the PBCH occupies at least 4 OFDM symbol transmissions; the at least 4 OFDM symbols are continuous or discontinuous.

Preferably, under the cyclic prefix-orthogonal frequency division multiplexing CP-OFDM waveform, the SSB further includes a demodulation pilot reference signal DMRS, where an OFDM symbol occupied by the DMRS in the time domain is the same as an OFDM symbol occupied by the PBCH in the time domain, and subcarriers occupied by the DMRS in the frequency domain and subcarriers occupied by the PBCH in the frequency domain are arranged at intervals.

Preferably, under the DFT-s-OFDM waveform of OFDM spread by DFT, the SSB further comprises a DMRS, wherein OFDM symbols occupied by the DMRS in the time domain and OFDM symbols occupied by the PBCH in the time domain are arranged at intervals, and subcarriers occupied by the DMRS in the frequency domain are the same as subcarriers occupied by the PBCH in the frequency domain.

It should be noted that the embodiments shown in fig. 3 to 14 are also applicable to the embodiment of the terminal, and the same technical effects can be achieved. In the terminal, the transceiver 161 and the memory 163, and the transceiver 161 and the processor 162 may be communicatively connected through a bus interface, and the functions of the processor 162 may be implemented by the transceiver 161, and the functions of the transceiver 161 may be implemented by the processor 162.

An embodiment of the present invention further provides a device for sending a signal, including:

Preferably, one said SSB occupies at most 11 OFDM symbol transmissions.

Preferably, under the CP-OFDM waveform, the SSB further includes a DMRS, wherein an OFDM symbol occupied by the DMRS in the time domain is the same as an OFDM symbol occupied by the PBCH in the time domain, and subcarriers occupied by the DMRS in the frequency domain are arranged at intervals with subcarriers occupied by the PBCH in the frequency domain.

An embodiment of the present invention further provides a terminal, including: a processor, a transceiver, and a memory, wherein the memory stores a program executable by the processor, and the processor implements the following when executing the program: receiving a synchronization signal block SSB in a time slot; the SSB comprises a primary synchronization signal PSS, a secondary synchronization signal SSS and a physical broadcast channel PBCH, wherein the PSS occupies two orthogonal frequency division multiplexing OFDM symbol transmissions, the SSS occupies two OFDM symbol transmissions, the pattern of the SSB used by the time slot where the SSB is located under the condition that a normal cyclic prefix CP is configured is a first SSB pattern, the pattern of the SSB used by the time slot where the SSB is located under the condition that an extended cyclic prefix CP is configured is a second SSB pattern, and the first SSB pattern is the same as the second SSB pattern.

Preferably, one said SSB occupies at most 11 OFDM symbol transmissions.

a transceiver module, configured to receive a synchronization signal block SSB in a timeslot; the SSB comprises a primary synchronization signal PSS, a secondary synchronization signal SSS and a physical broadcast channel PBCH, wherein the PSS occupies two OFDM symbol transmissions, the SSS occupies two OFDM symbol transmissions, the pattern of the SSB used by the time slot where the SSB is located under the condition that a conventional cyclic prefix CP is configured is a first SSB pattern, the pattern of the SSB used by the time slot where the SSB is located under the condition that an extended cyclic prefix CP is configured is a second SSB pattern, and the first SSB pattern is the same as the second SSB pattern.

Preferably, one said SSB occupies at most 11 OFDM symbol transmissions.

Embodiments of the present invention also provide a computer storage medium including instructions that, when executed on a computer, cause the computer to perform the method described above with respect to fig. 2 or fig. 15.

The above-described embodiments of the present invention have the same pattern of S-SSB in both the normal CP and the extended CP. When the Sidelink communication subcarrier interval is larger, the S-SSB pattern under the extended CP is used, so that the intersymbol interference caused by multipath time delay is avoided, the detection success rate of P-SSS and S-SSS sequences is improved, the decoding success rate of a PSBCH (pseudo-broadcast channel) of a receiving side terminal is also improved, and the requirement of the coverage radius of NR V2X is met.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.

It can be clearly understood by those skilled in the art that, for convenience and simplicity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the embodiments provided in the present invention, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one type of logical functional division, and other divisions may be realized in practice, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a U disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.

Furthermore, it should be noted that in the apparatus and method of the present invention, it is obvious that each component or each step may be decomposed and/or recombined. These decompositions and/or recombinations are to be regarded as equivalents of the present invention. Also, the steps of performing the series of processes described above may naturally be performed chronologically in the order described, but need not necessarily be performed chronologically, and some steps may be performed in parallel or independently of each other. It will be understood by those skilled in the art that all or any of the steps or elements of the method and apparatus of the present invention may be implemented in any computing device (including processors, storage media, etc.) or network of computing devices, in hardware, firmware, software, or any combination thereof, which can be implemented by those skilled in the art using their basic programming skills after reading the description of the present invention.

Thus, the objects of the invention may also be achieved by running a program or a set of programs on any computing device. The computing device may be a general purpose device as is well known. The object of the invention is thus also achieved solely by providing a program product comprising program code for implementing the method or the apparatus. That is, such a program product also constitutes the present invention, and a storage medium storing such a program product also constitutes the present invention. It is to be understood that the storage medium may be any known storage medium or any storage medium developed in the future. It is further noted that in the apparatus and method of the present invention, it is apparent that each component or step can be decomposed and/or recombined. These decompositions and/or recombinations are to be regarded as equivalents of the present invention. Also, the steps of executing the series of processes described above may naturally be executed chronologically in the order described, but need not necessarily be executed chronologically. Some steps may be performed in parallel or independently of each other.

While the foregoing is directed to the preferred embodiment of the present invention, it will be appreciated by those skilled in the art that various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A method for transmitting a signal, applied to a terminal, the method comprising:

in the time slot, sending a synchronous signal block SSB; the SSB comprises a primary synchronization signal PSS, a secondary synchronization signal SSS and a physical broadcast channel PBCH, wherein the PSS occupies two Orthogonal Frequency Division Multiplexing (OFDM) symbol transmissions, the SSS occupies two OFDM symbol transmissions, the PBCH occupies at least 4 OFDM symbol transmissions, the at least 4 OFDM symbols are discontinuous, and an OFDM symbol occupied by a first PBCH in the at least 4 OFDM symbols is used as an Automatic Gain Control (AGC);

the pattern of the SSB used by the time slot where the SSB is located under the condition that the conventional cyclic prefix CP is configured is a first SSB pattern, the pattern of the SSB used by the time slot where the SSB is located under the condition that the extended cyclic prefix CP is configured is a second SSB pattern, the first SSB pattern is the same as the second SSB pattern, the first SSB pattern is located in one time slot, and the second SSB pattern is located in one time slot;

the SSB uses a cyclic prefix-orthogonal frequency division multiplexing (CP-OFDM) waveform, the SSB further comprises a demodulation pilot reference signal (DMRS), an OFDM symbol occupied by the DMRS in a time domain is the same as an OFDM symbol occupied by the PBCH in a time domain, and subcarriers occupied by the DMRS in the frequency domain and subcarriers occupied by the PBCH in the frequency domain are arranged at intervals.

2. The method of claim 1, wherein one of the SSBs occupies up to 11 OFDM symbol transmissions.

3. The method according to claim 1, wherein the SSS occupies at least one OFDM symbol between two OFDM symbols, and wherein the at least one OFDM symbol transmits other signals than the SSS signal.

4. The method according to any of claims 1 to 3, wherein the PBCH is located on OFDM symbols without DMRS on the OFDM waveform of cyclic prefix-orthogonal frequency division multiplexing CP-OFDM or discrete Fourier transform spread orthogonal frequency division multiplexing multiple Access DFT-s-OFDM.

5. The method according to any of claims 1 to 3, wherein, in the DFT-s-OFDM waveform of DFT spread spectrum, the SSB further comprises a DMRS, the OFDM symbols occupied by the DMRS in the time domain are spaced apart from the OFDM symbols occupied by the PBCH in the time domain, and the subcarriers occupied by the DMRS in the frequency domain are the same as the subcarriers occupied by the PBCH in the frequency domain.

6. The method of claim 1, wherein the SSB is a through-link synchronization signal block S-SSB, the PSS is a through-link primary synchronization signal S-PSS, the SSS is a through-link secondary synchronization signal S-SSS, and the PBCH is a through-link physical broadcast channel PSBCH.

7. A signal receiving method, applied to a terminal, the method comprising:

in a time slot, receiving a synchronization signal block SSB; the SSB comprises a primary synchronization signal PSS, a secondary synchronization signal SSS and a physical broadcast channel PBCH, wherein the PSS occupies two Orthogonal Frequency Division Multiplexing (OFDM) symbol transmissions, the SSS occupies two OFDM symbol transmissions, the PBCH occupies at least 4 OFDM symbol transmissions, the at least 4 OFDM symbols are discontinuous, and an OFDM symbol occupied by a first PBCH in the at least 4 OFDM symbols is used as an Automatic Gain Control (AGC);

the pattern of the SSB used by the time slot where the SSB is located under the condition that the normal cyclic prefix CP is configured is a first SSB pattern, the pattern of the SSB used by the time slot where the SSB is located under the condition that the extended cyclic prefix CP is configured is a second SSB pattern, the first SSB pattern is the same as the second SSB pattern, the first SSB pattern is located in one time slot, and the second SSB pattern is located in one time slot;

the SSB uses a cyclic prefix-orthogonal frequency division multiplexing CP-OFDM waveform, the SSB further comprises a demodulation pilot frequency reference signal DMRS, an OFDM symbol occupied by the DMRS on a time domain is the same as an OFDM symbol occupied by the PBCH on the time domain, subcarriers occupied by the DMRS on the frequency domain and subcarriers occupied by the PBCH on the frequency domain are arranged at intervals, the terminal uses the DMRS and the SSS to carry out channel estimation, a channel estimation value is obtained, and the channel estimation value is used for decoding the PBCH.

8. The method of receiving a signal of claim 7, wherein one said SSB occupies at most 11 orthogonal frequency division multiplexing, OFDM, symbol transmissions.

9. The method of receiving signals according to claim 7, wherein there is at least one OFDM symbol between two OFDM symbols occupied by the SSS, and the at least one OFDM symbol transmits other signals than the SSS signals.

10. The signal receiving method according to any one of claims 7 to 9, wherein, in the OFDM symbol where PBCH is located, no demodulation pilot reference signal DMRS is included in the OFDM waveform where cyclic prefix-orthogonal frequency division multiplexing CP-OFDM or discrete fourier transform spread orthogonal frequency division multiplexing multiple access DFT-s-OFDM is located, the terminal performs channel estimation using SSS to obtain a channel estimation value, and performs decoding of PBCH using the channel estimation value.

11. The method of receiving signals according to any of claims 7 to 9, wherein, in the OFDM-s-OFDM waveform of DFT-sf, the SSB further comprises a DMRS, wherein OFDM symbols occupied by the DMRS in the time domain are spaced apart from OFDM symbols occupied by the PBCH in the time domain, wherein subcarriers occupied by the DMRS in the frequency domain are the same as subcarriers occupied by the PBCH in the frequency domain, and wherein the terminal performs channel estimation using the DMRS and the SSS to obtain a channel estimation value, and performs decoding of the PBCH using the channel estimation value.

12. The method of receiving signals of claim 7, wherein the SSB is a through link synchronization signal block S-SSB, the PSS is a through link primary synchronization signal S-PSS, the SSS is a through link secondary synchronization signal S-SSS, and the PBCH is a through link physical broadcast channel PSBCH.

13. A terminal, comprising: a processor, a transceiver, and a memory, wherein the memory stores a program executable by the processor, and the processor implements the following when executing the program: in the time slot, sending a synchronous signal block SSB; the SSB comprises a primary synchronization signal PSS, a secondary synchronization signal SSS and a physical broadcast channel PBCH, wherein the PSS occupies two Orthogonal Frequency Division Multiplexing (OFDM) symbol transmissions, the SSS occupies two OFDM symbol transmissions, the PBCH occupies at least 4 OFDM symbol transmissions, the at least 4 OFDM symbols are discontinuous, and an OFDM symbol occupied by a first PBCH in the at least 4 OFDM symbols is used as an Automatic Gain Control (AGC);

the SSB uses a cyclic prefix-orthogonal frequency division multiplexing (CP-OFDM) waveform, and further comprises a demodulation pilot reference signal (DMRS), the OFDM symbol occupied by the DMRS in the time domain is the same as the OFDM symbol occupied by the PBCH in the time domain, and subcarriers occupied by the DMRS in the frequency domain and subcarriers occupied by the PBCH in the frequency domain are arranged at intervals.

14. The terminal of claim 13, wherein one of the SSBs occupies at most 11 OFDM symbol transmissions; at least one OFDM symbol is arranged between two OFDM symbols occupied by the SSS, and the at least one OFDM symbol transmits other signals except the SSS signals.

15. The terminal according to any of claims 13 to 14, characterized in that under cyclic prefix-orthogonal frequency division multiplexing CP-OFDM or orthogonal frequency division multiplexing multiple access DFT-s-OFDM waveform of discrete fourier transform spread, the PBCH is located on OFDM symbols that do not comprise demodulation pilot reference signals, DMRS.

16. The terminal according to any of claims 13 to 14, wherein the SSB further comprises, in an orthogonal frequency division multiplexing multiple access DFT-s-OFDM waveform of discrete fourier transform spread spectrum, a demodulation pilot reference signal DMRS, wherein OFDM symbols occupied by the DMRS in the time domain are spaced apart from OFDM symbols occupied by the PBCH in the time domain, and wherein subcarriers occupied by the DMRS in the frequency domain are the same as subcarriers occupied by the PBCH in the frequency domain.

17. The terminal of claim 13, wherein the SSB is a through-link synchronization signal block S-SSB, wherein the PSS is a through-link primary synchronization signal S-PSS, wherein the SSS is a through-link secondary synchronization signal S-SSS, and wherein the PBCH is a through-link physical broadcast channel PSBCH.

18. An apparatus for transmitting a signal, comprising:

the receiving and sending module is used for sending a synchronous signal block SSB in a time slot; the SSB comprises a primary synchronization signal PSS, a secondary synchronization signal SSS and a physical broadcast channel PBCH, wherein the PSS occupies two Orthogonal Frequency Division Multiplexing (OFDM) symbol transmissions, the SSS occupies two OFDM symbol transmissions, the PBCH occupies at least 4 OFDM symbol transmissions, the at least 4 OFDM symbols are discontinuous, and an OFDM symbol occupied by a first PBCH in the at least 4 OFDM symbols is used as an Automatic Gain Control (AGC);

19. A terminal, comprising: a processor, a transceiver, and a memory, wherein the memory stores a program executable by the processor, and the processor implements the following when executing the program: receiving a synchronization signal block SSB in a time slot; the SSB comprises a primary synchronization signal PSS, a secondary synchronization signal SSS and a physical broadcast channel PBCH, wherein the PSS occupies two Orthogonal Frequency Division Multiplexing (OFDM) symbol transmissions, the SSS occupies two OFDM symbol transmissions, the PBCH occupies at least 4 OFDM symbol transmissions, and when the at least 4 OFDM symbols are discontinuous, an OFDM symbol occupied by a first PBCH in the at least 4 OFDM symbols is used as Automatic Gain Control (AGC);

the SSB uses a cyclic prefix-orthogonal frequency division multiplexing CP-OFDM waveform, the SSB further comprises a demodulation pilot frequency reference signal DMRS, an OFDM symbol occupied by the DMRS on a time domain is the same as an OFDM symbol occupied by the PBCH on the time domain, and subcarriers occupied by the DMRS on the frequency domain and subcarriers occupied by the PBCH on the frequency domain are arranged at intervals.

20. The terminal of claim 19, wherein one of the SSBs occupies at most 11 OFDM symbol transmissions; at least one OFDM symbol is arranged between two OFDM symbols occupied by the SSS, and the at least one OFDM symbol transmits other signals except the SSS signals.

21. The terminal of any of claims 19 to 20, wherein in an OFDM symbol with a cyclic prefix-OFDM CP-OFDM or an OFDM-multiple access DFT-s-OFDM waveform with spread-spectrum discrete fourier transform, said PBCH does not include a DMRS, and wherein said terminal uses SSS for channel estimation, obtains a channel estimate, and uses said channel estimate for decoding the PBCH.

22. The terminal of any one of claims 19 to 20, wherein the SSB further comprises a demodulation pilot reference signal DMRS in an OFDM symbol occupied by the DMRS in the time domain and an OFDM symbol occupied by the PBCH in the time domain, wherein subcarriers occupied by the DMRS in the frequency domain are the same as subcarriers occupied by the PBCH in the frequency domain, wherein the terminal performs channel estimation using the DMRS and SSS to obtain a channel estimation value, and performs decoding of the PBCH using the channel estimation value.

23. The terminal of claim 19, wherein the SSB is a direct link synchronization signal block S-SSB, wherein the PSS is a direct link primary synchronization signal S-PSS, wherein the SSS is a direct link secondary synchronization signal S-SSS, and wherein the PBCH is a direct link physical broadcast channel PSBCH.

24. An apparatus for receiving a signal, comprising:

a transceiver module, configured to receive a synchronization signal block SSB in a timeslot; the SSB comprises a primary synchronization signal PSS, a secondary synchronization signal SSS and a physical broadcast channel PBCH, wherein the PSS occupies two Orthogonal Frequency Division Multiplexing (OFDM) symbol transmissions, the SSS occupies two OFDM symbol transmissions, the PBCH occupies at least 4 OFDM symbol transmissions, and when the at least 4 OFDM symbols are discontinuous, the OFDM symbol occupied by the first PBCH in the at least 4 OFDM symbols is used as an Automatic Gain Control (AGC);

25. A computer storage medium comprising instructions which, when executed on a computer, cause the computer to perform the method of any of claims 1 to 6 or the method of any of claims 7 to 12.