CN109547081B

CN109547081B - Method and device for sending and receiving synchronous signal and processing system of synchronous signal

Info

Publication number: CN109547081B
Application number: CN201811643467.2A
Authority: CN
Inventors: 苟伟; 夏树强; 韩晓钢; 孙云锋
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2013-04-19
Filing date: 2013-04-19
Publication date: 2022-04-19
Anticipated expiration: 2033-04-19
Also published as: WO2014169839A1; CN104113387B; CN109547081A; CN104113387A

Abstract

The invention discloses a method and a device for sending and receiving a synchronous signal and a system for processing the synchronous signal, wherein a network side sends a Primary Synchronization Signal (PSS) and/or a Secondary Synchronization Signal (SSS) by using the same antenna port as an antenna port of a demodulation reference signal (DMRS) in a subcarrier or a physical resource block which carries the PSS and/or the SSS. The invention improves the demodulation performance of the data.

Description

Method and device for sending and receiving synchronous signal and processing system of synchronous signal

The application is to the application number: 201310138436.2, filing date: in 2013, 19.04.19, the invention is entitled "method, device and system for processing synchronization signal, and method and device for channel estimation".

Technical Field

The present invention relates to the field of communications, and in particular, to a method and an apparatus for transmitting and receiving a synchronization signal, and a system for processing a synchronization signal.

Background

In the research of the release R11 phase of Long Term Evolution (Long Term Evolution, LTE for short), on the basis of the multi-carrier aggregation technology, new requirements are further provided for the spectrum resource utilization rate, network energy saving, and inter-cell interference suppression. To achieve this requirement, a New Carrier Type (NCT for short) is proposed (New Carrier). By means of carrier aggregation technology, the new carrier has a distinct characteristic that backward compatibility is not required to be considered in design, and more new technologies can be applied to the new carrier. For example, in LTE R11, a new carrier is defined as that at least one compatible carrier needs to be paired with the compatible carrier (also referred to as carrier aggregation operation with one compatible carrier), and a Cell-specific Reference signal (CRS) of LTE R8 is not configured in the new carrier, so as to avoid the serious CRS interference of neighboring cells at the Cell edge, especially the CRS interference between a macro Cell and a micro Cell in a HETerogeneous NETwork (HetNet) scenario. In the discussion of LTE R11, in order to further improve the usage scenario of the new carrier, a new carrier operating independently is also proposed, and at this time, the new carrier has the capability of independently accessing the UE and operating independently. Of course, it may also be paired with other carriers or operate in an aggregate manner.

Currently, the LTE R12 phase has been entered, the standardization work for new carriers is carried forward to LTE R12, and there are some preliminary conclusions and some new functions are introduced.

The new carrier is being standardized as a new carrier type and some consensus conclusions in the new carrier are as follows:

the new carrier uses a single-port CRS with a 5 millisecond (5ms) period to perform synchronization tracking (referred to as 5ms CRS in this application), which is obviously different from CRS in related systems and supports different port numbers.

In the new carrier, especially in the synchronous new carrier, whether Primary/Secondary Synchronization Signal (PSS/SSS) and 5ms CRS are configured or not is currently discussed, and most companies consider that PSS/SSS and 5ms CRS are still required to be configured and transmitted in the synchronous new carrier.

A Physical Downlink Control Channel (PDCCH) field is not allocated in the new carrier, and the original Physical Downlink Control Channel (PDCCH) field may be used to transmit a Physical Downlink Shared Channel (PDSCH). A Physical hybrid automatic repeat request Indicator Channel (PHICH) and a Physical Control Format Indicator Channel (PCFICH) are not allocated in the new carrier.

The new carrier is divided into a non-independent operation carrier and an independent operation carrier, and the new carrier described above is the non-independent operation new carrier. The difference between the independently operated new carrier and the non-independently operated new carrier is as follows: the non-independent operation NCT requires an operation of aggregation with at least one backward compatible carrier. A general non-independent operation NCT can only serve as a Secondary Cell (Scell) of a UE.

In a new carrier, a preliminary plan still uses a Demodulation Reference Signal (DMRS) pattern in LTE R11 as a Demodulation Reference Signal, but in 6 Physical Resource Block (PRB) pairs in the middle of the carrier (defined as the same as PRB pairs in the LTE 36.211 protocol), the position of PSS/SSS collides with the position of a symbol in which the DMRS pattern is located in the middle 6 PRB pairs because of carrying the PSS/SSS. In LTE R11, the collision is resolved by not mapping DMRS in the middle 6 PRB pairs, and at this time, the UE can still use the CRS in the middle 6 PRB pairs for data demodulation. This collision resolution is necessary since DMRS needs to be configured in the middle 6 PRB pairs since CRS is no longer transmitted in the new carrier. And there are also some solutions, for example, some companies give, considering that the conflicted DMRS is only in part of OFDM symbols, it is proposed to transmit PSS/SSS after the DMRS in the conflicted OFDM symbol in the middle 6 PRB pairs is cut off, and the UE demodulates data using the DMRS in the other remaining OFDM symbols in the middle 6 PRB pairs, resulting in poor demodulation performance.

Aiming at the problem that the data demodulation performance of the processing method of the synchronous signals in the related technology is poor, an effective solution is not provided at present.

Disclosure of Invention

The invention provides a method and a device for sending and receiving a synchronous signal and a system for processing the synchronous signal, which are used for at least solving the problems.

According to an aspect of the present invention, there is provided a method for transmitting a synchronization signal, including: the method comprises the steps that a network side transmits a Primary Synchronization Signal (PSS) and/or a Secondary Synchronization Signal (SSS) in a subcarrier or a physical resource block carrying the PSS and/or the SSS by using the same antenna port as that of a demodulation reference signal (DMRS) in the subcarrier or the physical resource block.

Optionally, the network side, in a subcarrier or a physical resource block carrying the PSS and/or SSS, transmitting the PSS and/or the SSS using the same antenna port as an antenna port of the DMRS in the subcarrier or the physical resource block includes one of:

the network side maps the PSS to a signal of one of the following DMRS antenna ports on the subcarriers or physical resource blocks:

antenna port 7, antenna port 8, antenna port 9, antenna port 10;

the network side maps the SSS to a signal of one of the following DMRS antenna ports on the subcarriers or physical resource blocks:

the antenna port 7, the antenna port 8, the antenna port 9, the antenna port 10;

the network side maps the PSS and the SSS to signals of one of the following DMRS antenna ports, or to signals of two of the following DMRS antenna ports, on the subcarriers or physical resource blocks:

the antenna port 7, the antenna port 8, the antenna port 9, and the antenna port 10.

Optionally, the network side directly or indirectly indicates the preset antenna ports corresponding to the primary synchronization signal and the secondary synchronization signal at the receiving end.

Optionally, the preset antenna port corresponding to the primary synchronization signal is an antenna port 7, and the preset antenna port corresponding to the secondary synchronization signal is an antenna port 8; or the preset antenna port corresponding to the primary synchronization signal is an antenna port 8, and the preset antenna port corresponding to the secondary synchronization signal is an antenna port 7.

Optionally, when the PSS and/or SSS are used as reference signals for DMRS antenna ports on the subcarriers or physical resource blocks carrying the PSS and/or the SSS, REs occupied by the antenna ports of the DMRS are resource elements RE occupied by the PSS and/or the SSS, and sequences used by the antenna ports of the DMRS are sequences used by the PSS and/or the SSS, and the antenna ports of the DMRS are one of the following: antenna port 7, antenna port 8, antenna port 9, antenna port 10.

Optionally, on physical resource blocks carrying the PSS and/or the SSS, which are used as reference signals for DMRS antenna port M, antenna port N,

RE occupied by the DMRS antenna port M is resource element RE occupied by the PSS or the SSS, and a sequence used by the antenna port M is a sequence used by the PSS or the SSS;

RE occupied by the DMRS antenna port N is resource element RE occupied by the PSS or the SSS, and a sequence used by the antenna port M is a sequence used by the PSS or the SSS;

the DMRS antenna port M and the DMRS antenna port N are both one of the following: antenna port 7, antenna port 8, antenna port 9, antenna port 10, the sequence used by the PSS or the SSS is the sequence used by the DMRS antenna port M.

Optionally, when the PSS and/or the SSS are used as DMRS signals for the DMRS antenna port M and/or the antenna port N, the subcarriers or physical resource blocks carrying the PSS and/or the SSS use the same weight for precoding.

Optionally, on the sub-carriers or physical resource blocks carrying the PSS and/or the SSS,

when single user is transmitted, the maximum number of layers for scheduling user data transmission is less than or equal to 2;

and when the multi-user multiplexing transmission is carried out, the number of layers for scheduling user data transmission is 1, and the data of the multi-user multiplexing transmission is transmitted based on the PSS or the SSS as an antenna DMRS antenna port.

Optionally, the network side indicates, through a downlink control channel, the DMRS antenna port and the allocation of the number of layers; or

The network side informs a receiving end of the allocation conditions of the weight information used by the PSS or the SSS, the DMRS antenna port and the number of layers through a high-level signaling; or

And presetting the antenna port number when an enhanced physical downlink control channel is sent in the subcarrier or the physical resource block carrying the PSS and/or the SSS.

Optionally, the antenna port is a DMRS antenna port agreed by a standardized protocol;

an antenna port for transmitting the PSS is the same as an antenna port for transmitting the SSS;

an antenna port transmitting the PSS is different from an antenna port transmitting the SSS; alternatively, the first and second electrodes may be,

the antenna port of the DMRS is agreed by a standardization protocol and is one of DMRS antenna ports used in the subcarrier or physical resource block in which the PSS and/or the SSS are located.

According to another aspect of the present invention, there is also provided a synchronization signal receiving method, including: the method comprises the steps that a receiving end receives a Primary Synchronization Signal (PSS) and/or a Secondary Synchronization Signal (SSS) in a subcarrier or a physical resource block carrying the PSS and/or the SSS by using the same antenna port as an antenna port of a demodulation reference signal (DMRS) in the subcarrier or the physical resource block.

Optionally, after the receiving end receives the PSS and/or the SSS using the same antenna port as that of the DMRS in a subcarrier or a physical resource block carrying the PSS and/or the SSS, the method further includes one of:

the receiving end uses the PSS to perform channel estimation of one of the following DMRS antenna ports: antenna port 7, antenna port 8, antenna port 9, antenna port 10;

the receiving end uses the SSS to perform channel estimation on one of the following DMRS antenna ports: the antenna port 7, the antenna port 8, the antenna port 9, the antenna port 10;

the receiving end uses the PSS and the SSS to perform channel estimation of one of the following DMRS antenna ports, or two of the following DMRS antenna ports: the antenna port 7, the antenna port 8, the antenna port 9, the antenna port 10;

the receiving end uses the PSS or the SSS to perform channel estimation of the antenna port 7;

the receiving end uses the PSS or the SSS to perform channel estimation of the antenna port 8;

the receiving end performs channel estimation of the antenna port 7 using the PSS or the SSS, and performs channel estimation of the antenna port 8 using the PSS or the SSS.

Optionally, the receiving end determines the preset antenna ports corresponding to the primary synchronization signal and the secondary synchronization signal according to a direct or indirect indication from a network side.

Optionally, when channel estimation is performed on the subcarriers or physical resource blocks carrying the PSS and/or the SSS using antenna ports of DMRS, REs occupied by antenna ports of DMRS desired by the receiving end are resource elements RE occupied by the PSS and/or the SSS, and sequences used by antenna ports of the DMRS are sequences used by the PSS and/or the SSS, where an antenna port of the DMRS is one of the following: antenna port 7, antenna port 8, antenna port 9, antenna port 10.

Optionally, when channel estimation is performed using DMRS antenna port M and DMRS antenna port N on the sub-carriers or physical resource blocks carrying the PSS and/or the SSS,

the sequence used by the PSS or the SSS is the sequence used by the DMRS antenna port M, and the DMRS antenna port M and the DMRS antenna port N are both one of the following: antenna port 7, antenna port 8, antenna port 9, antenna port 10.

Optionally, when the PSS and/or the SSS are used to perform channel estimation on the DMRS antenna port M and the antenna port N, the receiving end expects that the precoding weights corresponding to the DMRS on the subcarriers or physical resource blocks carrying the PSS and/or the SSS are the same.

and when the multi-user multiplexing transmission is carried out, the number of layers for scheduling user data transmission is 1, and the data of the multi-user multiplexing transmission is transmitted based on the PSS or the SSS as a DMRS antenna port.

Optionally, the receiving end obtains the DMRS antenna port and the allocation of the number of layers by receiving downlink control information of a downlink control channel; or

The receiving end acquires the weight information used by the PSS or the SSS, the DMRS antenna port and the distribution condition of the number of layers through high-level signaling; or

According to another aspect of the present invention, there is provided a synchronization signal transmitting apparatus, applied to a network side, including: the mapping method comprises a first mapping module, a second mapping module and a third mapping module, wherein the first mapping module is used for transmitting a Primary Synchronization Signal (PSS) and/or a Secondary Synchronization Signal (SSS) in a subcarrier or a physical resource block carrying the PSS and/or the SSS by using the same antenna port as that of a demodulation reference signal (DMRS) in the subcarrier or the physical resource block.

According to another aspect of the present invention, there is provided a synchronization signal receiving apparatus, applied to a receiving end, including: a third receiving module, configured to receive, in a subcarrier or a physical resource block carrying a primary synchronization signal PSS and/or a secondary synchronization signal SSS, the PSS and/or the SSS using an antenna port that is the same as an antenna port of a demodulation reference signal DMRS in the subcarrier or the physical resource block.

According to another aspect of the present invention, there is also provided a synchronization signal processing system, including: the above-mentioned transmission apparatus of the synchronization signal (applied to the network side) and the above-mentioned reception apparatus of the synchronization signal (applied to the reception side).

By the technical scheme, the network side transmits the PSS and/or the SSS by using the same antenna port as the antenna port of the demodulation reference signal DMRS in the subcarrier or the physical resource block for bearing the primary synchronization signal PSS and/or the secondary synchronization signal SSS, so that the problem of poor demodulation performance of a processing method of the synchronization signal in the related technology is solved, and the data demodulation performance in the PRB pair is improved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:

fig. 1 is a first flowchart of a method for processing a synchronization signal according to an embodiment of the present invention;

FIG. 2 is a second flowchart of a method for processing a synchronization signal according to an embodiment of the present invention;

fig. 3 is a first block diagram of a synchronization signal processing apparatus according to an embodiment of the present invention;

fig. 4 is a first preferred block diagram of a device for processing synchronization signals according to an embodiment of the present invention;

fig. 5 is a second configuration block diagram of a synchronization signal processing apparatus according to an embodiment of the present invention;

fig. 6 is a second preferred block diagram of a synchronization signal processing apparatus according to an embodiment of the present invention;

fig. 7 is a first block diagram of a system for processing a synchronization signal according to an embodiment of the present invention;

fig. 8 is a third flowchart of a method of processing a synchronization signal according to an embodiment of the present invention;

FIG. 9 is a flow chart of a channel estimation method according to an embodiment of the present invention;

fig. 10 is a third structural block diagram of a processing device of a synchronization channel according to an embodiment of the present invention;

fig. 11 is a third preferred block diagram of a processing device for synchronization channels according to an embodiment of the present invention;

fig. 12 is a block diagram of a structure of a channel estimation apparatus according to an embodiment of the present invention;

fig. 13 is a block diagram of a preferred structure of a channel estimation apparatus according to an embodiment of the present invention;

fig. 14 is a second configuration block diagram of a system for processing a synchronization signal according to an embodiment of the present invention.

Detailed Description

The invention will be described in detail hereinafter with reference to the accompanying drawings in conjunction with embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

The present embodiment provides a method for processing a synchronization signal, and fig. 1 is a first flowchart of a method for processing a synchronization signal according to an embodiment of the present invention, and as shown in fig. 1, the method mainly includes the following steps (step S102-step S104).

Step S102, a network side determines a first precoding matrix used by DMRSs of one or more antenna ports of a plurality of PRB pairs bearing a PSS and/or a SSS, wherein the first precoding matrix is used in a plurality of PRBs.

And step S104, the network side uses the first precoding matrix to precode the PSS and/or the SSS.

Through the steps, the PSS and/or the SSS are subjected to precoding processing, and the precoding matrix is used by the DMRS of one or more antenna ports of a plurality of PRB pairs for bearing the PSS and/or the SSS, so that a receiving party can use the PSS and/or the SSS and the DMRS in the PRB pairs for bearing the PSS and/or the SSS to jointly demodulate data, the problem that the demodulation performance of the processing method of the synchronization signals in the related technology is poor is solved, and the data demodulation performance in the PRB pairs is improved.

For example: for the new carrier, when the new carrier drops the DMRS on the OFDM symbol which conflicts with the PSS and/or the SSS in the middle 6 PRB pairs, the PSS and/or SSS transmission mode provided by the steps can be adopted to solve the problem of the reduction of demodulation performance caused by dropping part of the DMRS.

In implementation, according to the difference between the PSS and/or the SSS transmitted using a single antenna port and a multiple antenna port, the network side may determine the first precoding matrix used by one or more antenna ports of multiple PRB pairs carrying the PSS and/or the SSS in the following two ways:

the first method is as follows: when the PSS and/or the SSS are transmitted by using a single antenna port, the network side selects one antenna port from all antenna ports of the PRB pair, and takes a second precoding matrix used by the DMRS of the selected antenna port as the first precoding matrix;

the second method comprises the following steps: when the PSS and/or the SSS are transmitted by using multiple antenna ports, the network side selects at least two antenna ports from all antenna ports of the PRB pair, and takes a third precoding matrix used by the DMRS of the selected at least two antenna ports as the first precoding matrix.

As a preferred embodiment, after the network side uses a precoding matrix to precode the PSS and/or the SSS, the PSS and/or the SSS may also be transmitted in one of the following manners:

the first method is as follows: in a Frequency Division Duplex (FDD) mode and in a standard Cyclic Prefix (CP), the network side transmits the PSS after precoding on Orthogonal Frequency Division Multiplexing (OFDM) symbols 6 of subframe 0 and subframe 5 and transmits the SSS after precoding on OFDM symbols 5 of subframe 0 and subframe 5;

in a Time Division Duplex (TDD) mode and in a standard CP, a network side transmits the SSS after precoding on OFDM symbols 13 of subframe 0 and subframe 5, and transmits the PSS after precoding on OFDM symbols 2 of subframe 1 and subframe 6;

the second method comprises the following steps: at the time of the normal CP, the network side transmits the PSS after precoding on the OFDM symbols 3 of the subframe 0 and the subframe 5, and transmits the SSS after precoding on the OFDM symbols 2 of the subframe 0 and the subframe 5;

the third method comprises the following steps: in the normal CP, the network side transmits the PSS after precoding on the subframe 0 and the symbol 8 of the subframe 5, and transmits the SSS after precoding on the OFDM symbol 1 of the subframe 0 and the subframe 5.

The method is as follows: in the FDD mode and the normal CP, the network side transmits the PSS after precoding on the OFDM symbols 8 of the subframe 0 and the subframe 5, and transmits the SSS after precoding on the OFDM symbols 3 of the subframe 0 and the subframe 5;

in the TDD mode and the normal CP, the network side transmits the SSS after precoding in the OFDM symbols 0 and 8 of the subframe 5, and transmits the PSS after precoding in the OFDM symbols 0 of the subframe 1 and 6.

In implementation, in order to improve the accuracy of transmission, when configured for a standard CP in the FDD scheme, the network cancels the transmission of the DMRS in the resources of the OFDM symbol 5 and the OFDM symbol 6 in the PRB pair carrying the PSS and/or the SSS; in the TDD mode and the standard CP configuration, the network side cancels DMRS transmission in the resource of the OFDM symbol 13 in the PRB pair carrying the SSS.

In implementation, the network side may employ various embodiments to implement precoding the PSS and/or the SSS using the first precoding matrix. For example: when the PSS and/or the SSS are transmitted by using a multi-antenna port, a network side divides subcarriers carrying the PSS and/or the SSS into a plurality of groups; the PSS and/or SSS carried by each group uses the precoding matrix corresponding to the DMRS of the antenna port corresponding to each group to carry out precoding; and the sub-carriers of each group are transmitted by using different antenna ports, and the number of the groups is equal to the total number of the antenna ports used for transmitting the PSS and/or the SSS.

In implementation, grouping may be performed according to the scheme in the related art, and as a preferred implementation, the network side may divide the subcarriers carrying the PSS and/or the SSS into multiple groups in one of the following manners:

the first method is as follows: grouping according to the number of the sub-carriers carrying the PSS and/or the SSS;

the second method comprises the following steps: and grouping according to the PRB of the subcarrier carrying the PSS and/or the SSS.

As a preferred embodiment, the precoding matrices of the first precoding matrix in the plurality of PRB pairs are the same.

As another preferred embodiment, the selected one of the antenna ports comprises one of: antenna port 7, antenna port 8, antenna port 9, antenna port 10.

As yet another preferred embodiment, the at least two selected antenna ports include at least two of the following antenna ports: antenna port 7, antenna port 8, antenna port 9, antenna port 10.

For the receiving end, after the network side uses the first precoding matrix to precode the PSS and/or the SSS, the received data needs to be decoded, and the following describes in detail a preferred embodiment of decoding:

when the receiving end determines that the PRB pair which is distributed by the network side and used for transmitting the data is in a plurality of PRB pairs which bear the PSS and/or the SSS, the receiving end receives one of the following PRB pairs in the data transmission: data, DMRS and PSS sent by a network side; data, DMRS and SSS sent by a network side; data, DMRS, PSS and SSS sent by a network side; the receiving end then performs one of the following operations:

operation one: a receiving end demodulates the data sent by the network side by using the received PSS and/or SSS and the DMRS;

and operation II: the receiving end jointly decodes the following received data: the received PSS and/or SSS, DMRS, and data transmitted by a network side.

Preferably, the receiving end determines that the precoding matrix used by the PSS and/or the SSS received from the PRB pair transmitting the data is the same as the precoding matrix of the DMRS received from the PRB pair transmitting the data.

Preferably, when transmitting the PSS and/or the SSS using a single antenna port, the receiving end determines that the antenna port used by the PSS and/or the SSS received from the PRB pair transmitting the data is the same as the antenna port used by the DMRS received from the PRB pair transmitting the data; or, the receiving end determines that a precoding matrix corresponding to the PSS and/or the SSS received from the OFDM symbol of the PRB pair for transmitting the data is a precoding matrix of the DMRS whose transmission is stopped in the OFDM symbol.

The present preferred embodiment provides a method for processing a synchronization signal, and fig. 2 is a second flowchart of the method for processing a synchronization signal according to the embodiment of the present invention, and as shown in fig. 2, the method mainly includes the following steps (step S202-step S204).

Step S202: the receiving end receives a PSS and/or a SSS in the allocated PRB pairs, wherein the PSS and/or the SSS are subjected to precoding processing by a network side by using a first precoding matrix, the first precoding matrix is determined by the network side and is used by a DMRS of one or more antenna ports of a plurality of PRB pairs which bear the PSS and/or the SSS, and the first precoding matrix is used in the plurality of PRBs.

Step S204: and the receiving end demodulates the downlink data in the allocated PRB pair by using the PSS and/or the SSS.

Through the steps, by receiving the PSS and/or the SSS which are processed by precoding, the precoding matrix is used by the DMRS of one or more antenna ports of a plurality of PRB pairs bearing the PSS and/or the SSS, so that a receiving end can use the PSS and/or the SSS and the DMRS in the PRB pairs bearing the PSS and/or the SSS to jointly demodulate data, the problem that the demodulation performance of the processing method of the synchronization signals in the related technology is poor is solved, and the data demodulation performance in the PRB pairs is improved.

In implementation, a receiving end may demodulate downlink data in allocated PRB pairs through multiple embodiments, and as a preferred embodiment, the receiving end determines that a PRB pair for transmitting data on the network side is in a PRB pair carrying the PSS and/or the SSS; receiving the PSS and/or SSS and DMRS in a PRB pair for transmitting data by a receiving end; and the receiving end demodulates the data by using the PSS and/or the SSS and the DMRS.

Preferably, the precoding matrix used by the PSS and/or SSS received from the PRB pair transmitting the data is the same as the precoding matrix of the DMRS received from the PRB pair transmitting the data.

Preferably, the antenna ports used by the PSS and/or SSS received from the PRB pair transmitting the data are the same as the antenna ports used by the DMRS received from the PRB pair transmitting the data.

Preferably, the precoding matrix to which the DMRS is canceled in the received OFDM symbol corresponding to the PSS and/or the SSS is the first precoding matrix corresponding to the PSS and/or the SSS.

In implementation, according to a difference between a PSS and/or a SSS transmitted using a single antenna port and a multi-antenna port, when the PSS and/or the SSS is transmitted using a single antenna port, the first precoding matrix is a second precoding matrix used by the network side for one antenna port selected from all antenna ports of the PRB pair; when the PSS and/or the SSS are transmitted by using multiple antenna ports, the first precoding matrix is a third precoding matrix used by at least two antenna ports selected from all antenna ports of the PRB pair by the network side.

Preferably, the allocated PRB pair refers to a PRB pair allocated by the network side for the receiving end to transmit downlink data and/or control signaling, and the PSS and/or the SSS are configured in the allocated PRB pair. Preferably, the downlink data includes: user plane data and control class signaling.

Preferably, when the PSS and/or the SSS are transmitted using a multi-antenna port, the subcarriers carrying the PSS and/or the SSS will be divided into multiple groups by the network side; the PSS and/or the SSS borne by each group are precoded by using a precoding matrix corresponding to the DMRS of the antenna port corresponding to each group; and the sub-carriers of each group are transmitted by using different antenna ports, and the number of the groups is equal to the total number of the antenna ports used for transmitting the PSS and/or the SSS.

Preferably, the subcarriers carrying the PSS and/or the SSS are divided into a plurality of groups by the network side according to one of the following ways:

grouping according to the number of the sub-carriers carrying the PSS and/or the SSS;

and grouping according to the PRB of the subcarrier carrying the PSS and/or the SSS.

As another preferred embodiment, the one antenna port selected includes one of: antenna port 7, antenna port 8, antenna port 9, antenna port 10.

It should be noted that the steps illustrated in the flowcharts of the figures may be performed in a computer system such as a set of computer-executable instructions and that, although a logical order is illustrated in the flowcharts, in some cases, the steps illustrated or described may be performed in an order different than presented herein.

In another embodiment, a software for processing a synchronization signal is provided, and the software is used to implement the technical solutions described in the above embodiments and the preferred embodiments.

In another embodiment, a storage medium is provided, in which the data transmission software is stored, and the storage medium includes but is not limited to: optical disks, floppy disks, hard disks, erasable memory, etc.

The embodiment of the present invention further provides a device for processing a synchronization signal, which is applied to a network side, and the device for processing a synchronization signal can be used to implement the method for processing a synchronization signal and the preferred embodiment, which have been described and are not described again, and a description is provided below for modules involved in the device for processing a synchronization signal. As used below, the term "module" may be a combination of software and/or hardware that implements a predetermined function. While the systems and methods described in the following embodiments are preferably implemented in software, implementations in hardware, or a combination of software and hardware are also possible and contemplated.

Fig. 3 is a first block diagram of a synchronization signal processing apparatus according to an embodiment of the present invention, as shown in fig. 3, the apparatus including: the first determining module 32 and the first pre-coding module 34 are described in detail below.

A first determining module 32, configured to determine a first precoding matrix used by a demodulation reference signal DMRS of one or more antenna ports of a plurality of physical resource block PRB pairs carrying primary synchronization signals PSS and/or secondary synchronization signals SSS, where the first precoding matrix is used in each of the plurality of PRBs;

a first precoding module 34, connected to the first determining module 32, for precoding the PSS and/or the SSS using the first precoding matrix determined by the first determining module 32.

Fig. 4 is a first preferred block diagram of a synchronization signal processing apparatus according to an embodiment of the present invention, and as shown in fig. 4, the first determining module 32 includes: a first selection module 322, a second determination module 324, a second selection module 326, a third determination module 328; the above-mentioned device still includes: a sending module 42, a first processing module 44, a second processing module 46; the first pre-coding module 34 includes: a first partitioning module 342, a second pre-coding module 344; the first division module 342 includes: the second division module 3422 or the third division module 3424, which will be described in detail below.

The first determination module 32 includes: a first selecting module 322, configured to select one antenna port from all antenna ports of the PRB pair when transmitting the PSS and/or the SSS using a single antenna port; a second determining module 324, connected to the first selecting module 322, configured to use the second precoding matrix used by the DMRS for the antenna port selected by the first selecting module 322 as the first precoding matrix; a second selecting module 326, configured to select at least two antenna ports from all antenna ports of the PRB pair when the PSS and/or the SSS are transmitted using multiple antenna ports; a third determining module 328 is connected to the second selecting module 326, and is configured to use the third precoding matrix used by the DMRS for the at least two antenna ports selected by the second selecting module 326 as the first precoding matrix.

Preferably, the above apparatus further comprises: a transmitting module 42, connected to the first precoding module 34, configured to transmit the PSS and/or the SSS according to one of the following manners after the first precoding module 34 precodes the PSS and/or the SSS by using the first precoding matrix:

the first method is as follows: in a Frequency Division Duplex (FDD) mode and in a standard Cyclic Prefix (CP), the network side transmits the precoded PSS on OFDM symbols 6 of a subframe 0 and a subframe 5 and transmits the precoded SSS on OFDM symbols 5 of the subframe 0 and the subframe 5;

in the TDD mode and the normal CP, the network side transmits the SSS after precoding on the OFDM symbols 13 of the subframe 0 and the subframe 5, and transmits the PSS after precoding on the OFDM symbols 2 of the subframe 1 and the subframe 6;

the second method comprises the following steps: transmitting the PSS after precoding on OFDM symbol 3 of the subframe 0 and the subframe 5 and the SSS after precoding on OFDM symbol 2 of the subframe 0 and the subframe 5 at the time of the normal CP;

the third method comprises the following steps: transmitting the PSS after precoding on OFDM symbol 8 of the subframe 0 and the subframe 5 and the SSS after precoding on OFDM symbol 1 of the subframe 0 and the subframe 5 at the time of the normal CP;

the method is as follows: in the FDD mode and the normal CP, the PSS after precoding is transmitted on the symbols 8 of the subframe 0 and the subframe 5, and the SSS after precoding is transmitted on the OFDM symbols 3 of the subframe 0 and the subframe 5;

in the TDD mode and the normal CP, the SSS after precoding is transmitted on the 0 and the symbol 8 of the subframe 5, and the PSS after precoding is transmitted on the OFDM symbol 0 of the subframe 1 and the subframe 6.

Preferably, the above apparatus further comprises: a first processing module 44, connected to the first precoding module 34, configured to cancel sending of a demodulation reference signal DMRS in resources of OFDM symbol 5 and OFDM symbol 6 in the PRB pair carrying the PSS and/or SSS in the FDD mode and configured for the standard CP; a second processing module 46, connected to the first precoding module 34, configured to cancel sending the DMRS in a resource of an OFDM symbol 13 in a PRB pair carrying the SSS in the TDD mode and in the normal CP configuration.

Preferably, the first pre-coding module 34 comprises: a first dividing module 342, configured to divide subcarriers carrying the PSS and/or the SSS into multiple groups when the PSS and/or the SSS are transmitted using a multi-antenna port; a second precoding module 344, connected to the first partitioning module 342, configured to precode, by using a DMRS corresponding precoding matrix of a corresponding antenna port of each of the PSS and/or the SSS carried by each of the multiple groups partitioned by the first partitioning module 342; and the sub-carriers of each group are transmitted by using different antenna ports, and the number of the groups is equal to the total number of the antenna ports used for transmitting the PSS and/or the SSS.

Preferably, the first division module 342 comprises: a second dividing module 3422, configured to group according to the number of subcarriers carrying the PSS and/or the SSS; or, the third dividing module 3424 is configured to group according to the PRB carrying the subcarriers of the PSS and/or the SSS.

Preferably, the precoding matrices of the first precoding matrix in the plurality of PRB pairs are the same.

Preferably, the one antenna port selected by the first selection module 322 includes one of: antenna port 7, antenna port 8, antenna port 9, antenna port 10.

Preferably, the at least two antenna ports selected by the second selection module 326 include at least two of the following antenna ports: antenna port 7, antenna port 8, antenna port 9, antenna port 10.

The embodiment of the present invention further provides a device for processing a synchronization signal, which is applied to a receiving end, and the device for processing a synchronization signal can be used to implement the method for processing a synchronization signal and the preferred embodiment, which have been described and are not described again, and a description is provided below for modules involved in the device for processing a synchronization signal. As used below, the term "module" may be a combination of software and/or hardware that implements a predetermined function. While the systems and methods described in the following embodiments are preferably implemented in software, implementations in hardware, or a combination of software and hardware are also possible and contemplated.

Fig. 5 is a second block diagram of a synchronization signal processing apparatus according to an embodiment of the present invention, as shown in fig. 5, the apparatus including: the first receiving module 52 and the first demodulating module 54 are described in detail below.

A first receiving module 52, configured to receive a primary synchronization signal PSS and/or a secondary synchronization signal SSS in an allocated physical resource block PRB pair, where the PSS and/or the SSS are precoded by a network side using a first precoding matrix, where the first precoding matrix is used by a demodulation reference signal DMRS, which is determined by the network side and used for one or more antenna ports of multiple PRB pairs carrying the PSS and/or the SSS, where the first precoding matrix is used in all of the multiple PRBs; and a first demodulation module 54, connected to the first receiving module 52, for demodulating the downlink data in the allocated PRB pair by using the PSS and/or SSS received by the first receiving module 52.

Fig. 6 is a second preferred block diagram of the apparatus for processing the synchronization signal according to the embodiment of the present invention, and the first demodulation module 54 includes: the first demodulation module 54 includes: a fourth determining module 542, a second receiving module 544, and a second demodulating module 546, which are described in detail below.

A fourth determining module 542, configured to determine that a PRB pair for transmitting data on the network side is a PRB pair carrying the PSS and/or the SSS; a second receiving module 544, connected to the fourth determining module 542, for the fourth determining module 542 to determine that when the PRB pair carrying the PSS and/or the SSS is the PRB pair for the network side to transmit data, the PSS and/or the SSS, and the DMRS in the PRB pair for transmitting data are received; a second demodulation module 546, connected to the second receiving module 544, is configured to demodulate the transmission data using the PSS and/or SSS, and DMRS.

Preferably, the precoding matrix used by the PSS and/or SSS received from the PRB pair transmitting the data by the second receiving module 544 is the same as the precoding matrix of the DMRS received from the PRB pair transmitting the data.

Preferably, the antenna ports used by the PSS and/or SSS received by the second receiving module 544 from the PRB pair transmitting the data are the same as the antenna ports used by the DMRS received from the PRB pair transmitting the data.

Preferably, the precoding matrix for canceling the DMRS in the OFDM symbol corresponding to the PSS and/or the SSS received by the second receiving module 544 is the first precoding matrix corresponding to the PSS and/or the SSS.

As a preferred embodiment, when the PSS and/or the SSS are transmitted using a single antenna port, the first precoding matrix is a second precoding matrix used by the network side for one antenna port selected from all antenna ports of the PRB pair; when the PSS and/or the SSS are transmitted by using multiple antenna ports, the first precoding matrix is a third precoding matrix used by at least two antenna ports selected from all antenna ports of the PRB pair by the network side.

As a preferred embodiment, when the PSS and/or the SSS are transmitted using a multi-antenna port, the subcarriers carrying the PSS and/or the SSS will be divided into multiple groups by the network side; the PSS and/or the SSS borne by each group are precoded by using a precoding matrix corresponding to the DMRS of the antenna port corresponding to each group; and the sub-carriers of each group are transmitted by using different antenna ports, and the number of the groups is equal to the total number of the antenna ports used for transmitting the PSS and/or the SSS.

Preferably, the subcarriers carrying the PSS and/or the SSS are grouped by the network side by one of the following: grouping according to the number of the sub-carriers carrying the PSS and/or the SSS;

As a preferred embodiment, the one antenna port selected includes one of: antenna port 7, antenna port 8, antenna port 9, antenna port 10.

As a preferred embodiment, the at least two selected antenna ports include at least two of the following antenna ports: antenna port 7, antenna port 8, antenna port 9, antenna port 10.

This embodiment provides a synchronization system, fig. 7 is a block diagram of a structure of a system for processing a synchronization signal according to an embodiment of the present invention, and as shown in fig. 7, the synchronization system includes: a network side 2 and a receiving end 4, wherein the structure of the network side 2 is shown in fig. 3 or 4, and the structure of the receiving end 4 is shown in fig. 5 or 6, which are not described herein again.

The present embodiment provides a processing method of a synchronization signal, and fig. 8 is a third flowchart of the processing method of the synchronization signal according to the embodiment of the present invention, as shown in fig. 8, the method includes the following steps (step S802 and step S804).

Step S802: the network side determines the ports of the DMRS carrying the physical resource block pairs of the PSS and/or the SSS.

Step S804: and the network side maps the PSS and/or the SSS to the signals of the ports on the physical resource block pair.

Through the steps, the PSS and/or the SSS are mapped to the signals of the DMRS ports on the physical resource block pair, namely, the PSS and/or the SSS are subjected to precoding processing, and the precoding matrix is used by the DMRS of one or more antenna ports of a plurality of PRB pairs for bearing the PSS and/or the SSS, so that a receiving party can use the PSS and/or the SSS and the DMRS in the PRB pairs for bearing the PSS and/or the SSS to jointly demodulate data, the problem of poor demodulation performance of a processing method of the synchronization signals in the related technology is solved, and the data demodulation performance in the PRB pairs is improved.

As a preferred embodiment, the network side may map PSS and/or SSS to port signals on a physical resource block pair by one of the following methods:

the first method is as follows: the network side maps the PSS to a signal of one of the following DMRS ports on the physical resource block pair: port 7, port 8, port 9, port 10.

The second method comprises the following steps: the network side maps the SSS to a signal of one of the following DMRS ports on the physical resource block pair: the port 7, the port 8, the port 9, the port 10.

The third method comprises the following steps: the network side maps the PSS and the SSS on the physical resource block pair as signals of one of the following DMRS ports, or as signals of two of the following DMRS ports: the port 7, the port 8, the port 9, the port 10.

Preferably, the network side directly or indirectly indicates a preset port corresponding to the primary synchronization signal and the secondary synchronization signal at a receiving end. Preferably, the preset port corresponding to the primary synchronization signal is a port 7, and the preset port corresponding to the secondary synchronization signal is a port 8; or the preset port corresponding to the primary synchronization signal is port 8, and the preset port corresponding to the secondary synchronization signal is port 7.

As a preferred embodiment, when the PSS and/or SSS are used as reference signals of a DMRS port on a physical resource block pair carrying the PSS and/or the SSS, REs occupied by the DMRS port is resource element RE occupied by the PSS and/or the SSS, and a sequence used by the DMRS port is a sequence used by the PSS and/or the SSS, and the DMRS port is one of the following: port 7, port 8, port 9, port 10.

As another preferred embodiment, on the physical resource block pair carrying the PSS and/or the SSS, when the PSS and/or the SSS are used as reference signals of DMRS port M and port N,

RE occupied by the DMRS port M is resource element RE occupied by the PSS or the SSS, and a sequence used by the port M is a sequence used by the PSS or the SSS;

RE occupied by the DMRS port N is resource element RE occupied by the PSS or the SSS, and a sequence used by the port M is a sequence used by the PSS or the SSS;

the DMRS port M and the DMRS port N are both one of the following: port 7, port 8, port 9, port 10, the sequence used by the PSS or the SSS being the sequence used by the DMRS port M.

As still another preferred embodiment, when the PSS and/or the SSS are used as DMRS signals of the DMRS port M and/or the port N, the PRB pairs carrying the PSS and/or the SSS are precoded using the same weight.

Preferably, on a physical resource block pair carrying the PSS and/or the SSS, in single-user transmission, the maximum number of layers for scheduling user data transmission is less than or equal to 2; and when the multi-user multiplexing transmission is carried out, the number of layers for scheduling user data transmission is 1, and the data of the multi-user multiplexing transmission is transmitted based on the PSS or the SSS as DMRS ports.

As another preferred embodiment, the network side indicates the DMRS ports and the number of layers to be allocated through a downlink control channel; or, the network side notifies the receiving end through a high-level signaling, and the assignment of the weight information, the DMRS port, and the number of layers used by the PSS or the SSS; or, when an enhanced physical downlink control channel is sent in a PRB pair carrying the PSS and/or the SSS, the port number is preset.

The present preferred embodiment provides a channel estimation method, and fig. 9 is a flowchart of the channel estimation method according to the embodiment of the present invention, and as shown in fig. 9, the method includes the following steps (step S902 and step S904).

Step S902: the receiving end receives the PSS and/or the SSS.

Step S904: the receiving end uses the PSS and/or the SSS to carry out channel estimation; the PSS and/or the SSS are/is a signal mapped into a DMRS port by the network side, and the DMRS port is a port carrying DMRS of a physical resource block pair of the PSS and/or the SSS.

Through the steps, a receiving end uses the PSS and/or the SSS to perform channel estimation, the PSS and/or the SSS are/is mapped to signals of DMRS ports by the network side, the DMRS ports are/is ports carrying DMRSs of physical resource block pairs of the PSS and/or the SSS, namely precoding processing is adopted for the PSS and/or the SSS, and the precoding matrix is used by the DMRS of one or more antenna ports carrying one or more PRB pairs of the PSS and/or the SSS, so that a receiving end can use the PSS and/or the SSS and the DMRS in the PRB pairs carrying the PSS and/or the SSS to jointly demodulate data, the problem that the demodulation performance of a processing method of synchronous signals in the related technology is poor is solved, and the data demodulation performance in the PRB pairs is improved.

In implementation, the receiving end may perform channel estimation using the PSS and/or the SSS in a plurality of manners, for example, one of the following manners:

the first method is as follows: the receiving end uses the PSS to perform channel estimation on one of the following DMRS ports: port 7, port 8, port 9, port 10.

The second method comprises the following steps: the receiving end uses the SSS to perform channel estimation on one of the following DMRS ports: the port 7, the port 8, the port 9, the port 10.

The third method comprises the following steps: the receiving end uses the PSS and the SSS to perform channel estimation of one of the following DMRS ports, or two of the following DMRS ports: the port 7, the port 8, the port 9, the port 10.

The method is as follows: the receiving end uses the PSS or the SSS for channel estimation of the port 7.

The fifth mode is as follows: the receiving end uses the PSS or the SSS for channel estimation of the port 8.

The method six: the receiving end performs channel estimation of the port 7 using the PSS or the SSS, and performs channel estimation of the port 8 using the PSS or the SSS.

As another preferred embodiment, the receiving end determines the preset ports corresponding to the primary synchronization signal and the secondary synchronization signal according to the direct or indirect indication of the network side. Preferably, a preset port corresponding to the primary synchronization signal is a port 7, and a preset port corresponding to the secondary synchronization signal is a port 8; or the preset port corresponding to the primary synchronization signal is port 8, and the preset port corresponding to the secondary synchronization signal is port 7.

As another preferred embodiment, when performing channel estimation on a physical resource block pair carrying the PSS and/or the SSS using a port of a DMRS, an RE occupied by the port of the DMRS desired by the receiving end is a resource element RE occupied by the PSS and/or the SSS, a sequence used by the port of the DMRS is a sequence used by the PSS and/or the SSS, and the port of the DMRS is one of the following: port 7, port 8, port 9, port 10.

Preferably, when a DMRS port M and a DMRS port N are used for channel estimation on a physical resource block pair carrying the PSS and/or the SSS, REs occupied by the DMRS port M are resource elements RE occupied by the PSS or the SSS, and a sequence used by the port M is a sequence used by the PSS or the SSS; RE occupied by the DMRS port N is resource element RE occupied by the PSS or the SSS, and a sequence used by the port M is a sequence used by the PSS or the SSS; the sequence used by the PSS or the SSS is the sequence used by the DMRS port M, and the DMRS port M and the DMRS port N are both one of the following: port 7, port 8, port 9, port 10.

Preferably, when the PSS and/or the SSS are used to perform channel estimation on the DMRS port M and the port N, the receiving end expects that the precoding weights corresponding to the DMRS on the physical resource block pair carrying the PSS and/or the SSS are the same.

As a preferred embodiment, on a physical resource block pair carrying the PSS and/or the SSS, in single-user transmission, the maximum number of layers for scheduling user data transmission is less than or equal to 2; and when the multi-user multiplexing transmission is carried out, the number of layers for scheduling user data transmission is 1, and the data of the multi-user multiplexing transmission is transmitted based on the PSS or the SSS as DMRS ports.

Preferably, the receiving end obtains the DMRS port and the allocation of the number of layers by receiving downlink control information of a downlink control channel; or, the receiving end acquires, through a high-level signaling, a distribution condition of weight information used by the PSS or the SSS, the DMRS port, and the number of layers; or, when an enhanced physical downlink control channel is sent in a PRB pair carrying the PSS and/or the SSS, the port number is preset.

Fig. 10 is a block diagram of a third structure of a device for processing a synchronization channel according to an embodiment of the present invention, as shown in fig. 10, the device including: the fifth determining module 102 and the first mapping module 104 are described in detail below.

A fifth determining module 102, configured to determine a port of a demodulation reference signal DMRS of a physical resource block pair carrying a primary synchronization signal PSS and/or a secondary synchronization signal SSS; a first mapping module 104, connected to the fifth determining module 102, for mapping the PSS and/or the SSS on the physical resource block pair to signals of the port determined by the fifth determining module 102.

Fig. 11 is a third preferred block diagram of a device for processing a synchronization channel according to an embodiment of the present invention, and as shown in fig. 11, the first mapping module 104 includes one of the following modules: a second mapping module 1041, a third mapping module 1042, a fourth mapping module 1043; the above-mentioned device still includes: a first indication module 112, a second indication module 114, a notification module 116, and a third processing module 118, which are described in detail below.

The first mapping module 104 includes one of the following:

a second mapping module 1041, configured to map the PSS on the pair of physical resource blocks to a signal of one of the following DMRS ports: port 7, port 8, port 9, port 10;

a third mapping module 1042 for mapping the SSS on the physical resource block pair to a signal of one of the following DMRS ports: the port 7, the port 8, the port 9, the port 10;

a fourth mapping module 1043 to map the PSS and the SSS on the physical resource block pair to signals of one of the following DMRS ports, or to signals of two of the following DMRS ports: the port 7, the port 8, the port 9, the port 10.

Preferably, the above apparatus further comprises: a first indicating module 112, connected to the fifth determining module 102, configured to directly or indirectly indicate preset ports corresponding to the primary synchronization signal and the secondary synchronization signal at a receiving end.

Preferably, the preset port corresponding to the primary synchronization signal is a port 7, and the preset port corresponding to the secondary synchronization signal is a port 8; or, the preset port corresponding to the primary synchronization signal is a port 8, and the preset port corresponding to the secondary synchronization signal is a port 7.

Preferably, when the PSS and/or SSS are used as reference signals of a DMRS port on a physical resource block pair carrying the PSS and/or the SSS, REs occupied by the DMRS port are resource elements RE occupied by the PSS and/or the SSS, and a sequence used by the DMRS port is a sequence used by the PSS and/or the SSS, and the DMRS port is one of the following: port 7, port 8, port 9, port 10.

Preferably, on a physical resource block pair carrying the PSS and/or the SSS, which are used as reference signals for DMRS port M, port N,

Preferably, when the PSS and/or the SSS are used as DMRS signals of the DMRS port M and/or the port N, PRB pairs carrying the PSS and/or the SSS are precoded using the same weight.

Preferably, the PSS and/or SSS are carried on a physical resource block pair,

and when the multi-user multiplexing transmission is carried out, the number of layers for scheduling user data transmission is 1, and the data of the multi-user multiplexing transmission is transmitted based on the PSS or the SSS as DMRS ports.

Preferably, the above apparatus further comprises: a second indicating module 114, connected to the fifth determining module 102, configured to indicate the DMRS ports and the allocation of the number of layers through a downlink control channel; or the like, or, alternatively,

a notifying module 116, connected to the fifth determining module 102, configured to notify, through a higher layer signaling, the receiving end of the assignment of the weight information used by the PSS or the SSS, the DMRS port, and the number of layers; or the like, or, alternatively,

a third processing module 118, connected to the fifth determining module 102, configured to preset the port number when an enhanced physical downlink control channel is sent in a PRB pair carrying the PSS and/or the SSS.

In another embodiment, a channel estimation software is provided, which is used to implement the technical solutions described in the above embodiments and the preferred embodiments.

In another embodiment, a storage medium is provided, in which the channel estimation software is stored, and the storage medium includes but is not limited to: optical disks, floppy disks, hard disks, erasable memory, etc.

The embodiment of the present invention further provides a channel estimation device, which is applied to a receiving end, and the processing device of the synchronization signal can be used to implement the processing method and the preferred embodiment of the synchronization signal, which have been described and are not described again, and the modules involved in the channel estimation device are described below. As used below, the term "module" may be a combination of software and/or hardware that implements a predetermined function. While the systems and methods described in the following embodiments are preferably implemented in software, implementations in hardware, or a combination of software and hardware are also possible and contemplated.

Fig. 12 is a block diagram of a channel estimation apparatus according to an embodiment of the present invention, as shown in fig. 12, the apparatus including: the third receiving module 122 and the first channel estimating module 124, which will be described in detail below.

A third receiving module 122, configured to receive a primary synchronization signal PSS and/or a secondary synchronization signal SSS; a first channel estimation module 124 connected to the third receiving module 122, configured to perform channel estimation using the PSS and/or SSS received by the third receiving module 122; the PSS and/or the SSS are/is a signal mapped into a DMRS port by the network side, and the DMRS port is a port carrying DMRS of a physical resource block pair of the PSS and/or the SSS.

Fig. 13 is a block diagram of a preferred structure of a channel estimation device according to an embodiment of the present invention, and as shown in fig. 13, the first channel estimation module 124 includes one of the following modules: a second channel estimation module 1241, a third channel estimation module 1242, a fourth channel estimation module 1243, a fifth channel estimation module 1244, a sixth channel estimation module 1245, and an eighth channel estimation module 1246, where the apparatus further includes: a first obtaining module 134, a second obtaining module 136, and a presetting module 138, which are described in detail below.

The first channel estimation module 124 includes one of:

a second channel estimation module 1241 to use the PSS for channel estimation of one of the following DMRS ports:

port 7, port 8, port 9, port 10;

a third channel estimation module 1242 to use the SSS for channel estimation of one of the following DMRS ports:

the port 7, the port 8, the port 9, the port 10;

a fourth channel estimation module 1243 to use the PSS and the SSS for channel estimation of one of the following DMRS ports, or of two of the following DMRS ports:

the port 7, the port 8, the port 9, the port 10;

a fifth channel estimation module 1244 to perform channel estimation for port 7 using the PSS or the SSS;

a sixth channel estimation module 1245 to perform channel estimation for port 8 using the PSS or the SSS;

an eighth channel estimation module 1246 is configured to perform channel estimation for the port 7 using the PSS or the SSS, and to perform channel estimation for the port 8 using the PSS or the SSS.

Preferably, the above apparatus further comprises: a sixth determining module 132, configured to determine, according to the direct or indirect indication of the network side, preset ports corresponding to the primary synchronization signal and the secondary synchronization signal.

Preferably, the preset port corresponding to the primary synchronization signal is a port 7, and the preset port corresponding to the secondary synchronization signal is a port 8; or the preset port corresponding to the primary synchronization signal is port 8, and the preset port corresponding to the secondary synchronization signal is port 7.

Preferably, when channel estimation is performed on a physical resource block pair carrying the PSS and/or the SSS using a port of a DMRS, REs occupied by the port of the DMRS expected by the receiving end is resource elements RE occupied by the PSS and/or the SSS, and a sequence used by the port of the DMRS is a sequence used by the PSS and/or the SSS, where the port of the DMRS is one of: port 7, port 8, port 9, port 10.

Preferably, when channel estimation is performed using DMRS port M and DMRS port N on a physical resource block pair carrying the PSS and/or the SSS,

the sequence used by the PSS or the SSS is the sequence used by the DMRS port M, and the DMRS port M and the DMRS port N are both one of the following: port 7, port 8, port 9, port 10.

Preferably, the above apparatus further comprises:

a first obtaining module 134, connected to the third receiving module 122, configured to obtain, by receiving downlink control information of a downlink control channel, the DMRS port and the allocation of the number of layers; or the like, or, alternatively,

a second obtaining module 136, connected to the third receiving module 122, configured to obtain, through a high-level signaling, allocation conditions of weight information used by the PSS or the SSS, the DMRS port, and the number of layers; or the like, or, alternatively,

a presetting module 138, connected to the third receiving module 122, configured to preset the port number when an enhanced physical downlink control channel is sent in a PRB pair carrying the PSS and/or the SSS.

This embodiment provides a synchronization system, fig. 14 is a second structural block diagram of a synchronization signal processing system according to an embodiment of the present invention, and as shown in fig. 14, the synchronization system includes: a network side 6 and a receiving end 8, wherein the structure of the network side 6 is shown in fig. 10 or 11, and the structure of the receiving end 8 is shown in fig. 12 or 13, which are not described herein again.

Preferred embodiment 1

The preferred embodiment provides a configuration and transmission method of a synchronization signal, which implements transmission of the synchronization signal, and describes a case of a single antenna port.

In the preferred embodiment, the base station side performs the following steps: and the network side precodes the PSS and/or the SSS and then transmits the precoded PSS and/or the precoded SSS. In this step, the precoding matrix used for precoding is: and a precoding matrix used by the DMRS of 1 antenna port in a plurality of antenna ports in a plurality of PRB pairs carrying the PSS and/or the SSS, wherein the DMRS of the 1 antenna port is used in the plurality of PRB pairs.

Preferably, the precoding matrices used by the DMRSs for the 1 antenna port are the same in the plurality of PRB pairs.

As a preferred embodiment, in order to achieve compatibility of signal processing, the 1 antenna port includes port 7, port 8, port 9 or port 10.

In implementation, in order to improve the accuracy of transmission, the PSS and/or the SSS may be processed in different manners corresponding to different duplex manners.

Example 1: in the FDD scheme, in the normal CP configuration, the network side transmits the PSS in the precoding process in symbol #6 of subframes #0 and #5, and transmits the SSS in the precoding process in symbol #5 of subframes #0 and # 5.

(2) In the TDD scheme, in the normal CP configuration, the network side transmits the SSS subjected to precoding processing in symbol #13 of subframes #0 and #5, and transmits the PSS subjected to precoding processing in symbol #2 of subframes #1 and # 6.

Preferably, in example 1, corresponding to different duplexing methods, the following processing may be performed on the subframe #0 or # 5: in an FDD mode and in a standard CP configuration, a network side stops configuring and transmitting the DMRS in OFDM symbol #5 and #6 resources in a PRB pair carrying the PSS and/or the SSS; in TDD scheme and standard CP configuration, the network side stops configuring and transmitting DMRSs in OFDM symbol #13 resource in PRB pair carrying SSS.

Example 2: in the FDD scheme or TDD scheme, in the standard CP configuration, the network side transmits the PSS in the symbol #3 of the subframes #0 and #5 and transmits the SSS in the precoding process in the symbol #2 of the subframes #0 and # 5.

Example 3: in the FDD scheme or TDD scheme, when configuring the normal CP, the network side transmits the PSS for precoding processing in symbol #8 of subframes #0 and #5, and transmits the SSS for precoding processing in symbol #1 of subframes #0 and # 5.

Example 4: in the FDD scheme, in the case of standard CP configuration, the network side transmits a precoding PSS in symbol #8 of subframes #0 and #5 and a precoding SSS in symbol #3 of subframes #0 and # 5; in the TDD scheme, in the normal CP configuration, the network side transmits the SSS subjected to precoding processing in symbol #8 of subframes #0 and #5, and transmits the PSS subjected to precoding processing in symbol #0 of subframes #1 and # 6.

As another preferred embodiment, the receiving end (UE) determines the PRB pair allocated by the network side for itself to transmit data, and if the PRB pair to transmit data is in the PRB pair carrying the PSS and/or SSS, the receiving end receives its data from the PRB pair to transmit data, and simultaneously receives the DMRS and the synchronization signal (PSS and/or SSS) in the PRB pair to transmit data, and simultaneously uses the synchronization signal (PSS and/or SSS) and the DMRS received in the PRB pair to transmit data to demodulate data.

Preferably, the precoding matrix may be determined by one of the following methods: (1) the receiving end defaults that a precoding matrix used by the PSS and/or the SSS received from the PRB pair is the same as that of the DMRS received from the PRB pair; (2) the receiving end defaults that the antenna port used by the PSS and/or the SSS received from the PRB pair is the same as the antenna port used by the DMRS received from the PRB pair; (3) the receiving end defaults PSS and/or SSS received in the OFDM symbol to carry out precoding by using the precoding matrix of the DMRS which is stopped to be transmitted in the OFDM symbol.

Preferably, the receiving end jointly decodes the received data and the received synchronization signals (PSS and/or SSS) and DMRS.

In the preferred embodiment, corresponding to the steps executed by the base station side, the UE side executes the following steps: and the receiving end (UE) receives the PSS and/or the SSS which are subjected to precoding processing in the allocated PRB pair and is used for demodulating the downlink data in the allocated PRB pair.

In order to improve the demodulation accuracy, the allocated PRB pair refers to a PRB pair allocated by the network side for the UE to transmit downlink data or control signaling, and the PRB pair carries a PSS and/or a SSS.

As a preferred embodiment, the receiving end uses a single antenna port for receiving, where the single antenna port is predetermined and may be one of port 7, port 8, port 9, or port 10.

Preferably, the precoding matrix used for the precoding is: a precoding matrix used by a DMRS of 1 antenna port of a plurality of antenna ports of a plurality of PRB pairs carrying the PSS and/or SSS. Preferably, the DMRSs for the 1 antenna port are used in a plurality of PRB pairs, and the used precoding matrices are the same.

In implementation, in order to improve the efficiency of data processing, the downlink data includes user plane data and control signaling.

As another preferred embodiment, the receiving end determines the PRB pair allocated by the network side for transmitting data, and if the PRB pair for transmitting data is in the PRB pair carrying the PSS and/or SSS, the receiving end receives data of itself from the PRB pair for transmitting data, and simultaneously receives the synchronization signal (PSS and/or SSS) and DMRS in the PRB pair for transmitting data, and simultaneously uses the synchronization signal (PSS and/or SSS) and DMRS received in the PRB pair for transmitting data for data demodulation.

Preferred embodiment two

The preferred embodiment provides a configuration and transmission method of a synchronization signal, which implements transmission of the synchronization signal, and describes a case of multiple antenna ports.

In the preferred embodiment, the base station side performs the following steps: and the network side precodes the PSS and/or the SSS and then transmits the PSS and/or the SSS. The precoding matrix adopted by precoding is a precoding matrix used by the DMRS of at least 2 antenna ports in a plurality of PRB pairs for bearing the PSS and/or the SSS. Wherein the DMRS of the at least 2 antenna ports are used in the plurality of PRB pairs.

Preferably, the precoding matrices used by the DMRSs for the at least 2 antenna ports are the same in the plurality of PRB pairs.

As a preferred embodiment, in order to achieve compatibility of signal processing, the at least 2 antenna ports include a combination of at least 2 of the ports 7, 8, 9 and 10.

Example 5: in the FDD scheme, in the normal CP configuration, the network side transmits the PSS in the precoding process in symbol #6 of subframes #0 and #5, and transmits the SSS in the precoding process in symbol #5 of subframes #0 and # 5.

Preferably, in example 5, corresponding to different duplexing methods, the following processing may be performed on the subframe #0 or # 5: in an FDD mode and in a standard CP configuration, a network side stops configuring and transmitting the DMRS in OFDM symbol #5 and #6 resources in a PRB pair carrying the PSS and/or the SSS; in TDD scheme and standard CP configuration, the network side stops configuring and transmitting DMRSs in OFDM symbol #13 resource in PRB pair carrying SSS.

Example 6: in the FDD scheme or TDD scheme, in the standard CP configuration, the network side transmits the PSS in the symbol #3 of the subframes #0 and #5 and transmits the SSS in the precoding process in the symbol #2 of the subframes #0 and # 5.

Example 7: in the FDD scheme or TDD scheme, when configuring the normal CP, the network side transmits the PSS for precoding processing in symbol #8 of subframes #0 and #5, and transmits the SSS for precoding processing in symbol #1 of subframes #0 and # 5.

Example 8: in the FDD scheme, in the case of standard CP configuration, the network side transmits a precoding PSS in symbol #8 of subframes #0 and #5 and a precoding SSS in symbol #3 of subframes #0 and # 5; in the TDD scheme, in the normal CP configuration, the network side transmits the SSS subjected to precoding processing in symbol #8 of subframes #0 and #5, and transmits the PSS subjected to precoding processing in symbol #0 of subframes #1 and # 6.

As another preferred embodiment, the receiving end determines the PRB pair for transmitting data allocated by the network side, and if the PRB pair for transmitting data is in the PRB pair carrying the PSS and/or SSS, the receiving end receives its data from the PRB pair for transmitting data, and simultaneously receives the synchronization signal (PSS and/or SSS) and the DMRS in the PRB pair for transmitting data, and simultaneously uses the synchronization signal (PSS and/or SSS) and the DMRS received in the PRB pair for transmitting data to demodulate data.

Preferably, for a receiving end, a precoding matrix used by the PSS and/or the SSS received from a port in the PRB pair is the same as a precoding matrix used by the DMRS received from the port in the PRB pair.

As another preferred embodiment, before precoding PSS and/or SSS, the method further includes: grouping subcarriers carrying the PSS and/or the SSS, wherein the subcarriers of each group use different antenna ports for transmission, and precoding the PSS and/or the SSS transmitted by the group by using a precoding matrix corresponding to the DMRS of the antenna port. Preferably, the number of packets is equal to the number of antenna ports used for transmitting PSS and/or SSS.

Preferably, the grouping can be done in a variety of ways.

For example: the first method is as follows: grouping by subcarrier number, and dividing the subcarriers bearing the PSS and/or SSS into a plurality of groups, wherein the subcarriers with odd subcarrier numbers are divided into one group, and the subcarriers with even subcarrier numbers are divided into one group;

the second method comprises the following steps: and grouping the PRBs in the unit of PRB pair, and dividing the PRBs carrying the PSS and/or the SSS into a plurality of groups.

In the preferred embodiment, corresponding to the steps executed by the base station side, the UE side executes the following steps: a receiving end (UE) receives the precoded PSS and/or SSS from the allocated PRB pair using 2 or more antenna ports and demodulates downlink data in the allocated PRB pair.

Preferably, the precoding matrix used for the precoding is: a precoding matrix used by a DMRS of at least 2 antenna ports of a plurality of PRB pairs carrying the PSS and/or SSS. Preferably, the DMRSs for at least 2 antenna ports are used in the plurality of PRB pairs, and the precoding matrices used are the same.

In order to improve the efficiency of data processing, the downlink data includes: user plane data and control class signaling.

As another preferred embodiment, the receiving end determines the PRB pair allocated by the network side for transmitting data, and if the PRB pair for transmitting data is in the PRB pair carrying the PSS and/or SSS, the receiving end receives data of itself from the PRB pair for transmitting data, and simultaneously receives the synchronization signal (PSS and/or SSS) and DMRS in the PRB pair for transmitting data, and simultaneously uses the synchronization signal (PSS and/or SSS) and DMRS received in the PRB pair for transmitting data for data demodulation. Preferably, on the receiving end, the precoding matrix used by the PSS and/or the SSS received from different ports in the PRB pair is the same as the precoding matrix used by the DMRS received from the corresponding port in the PRB pair.

Preferably, the grouping can be done in a variety of ways.

Preferred embodiment three

The preferred embodiment provides a method for configuring and transmitting a synchronization signal used as a demodulation reference signal, which comprises the following steps: and the network side maps the main synchronous signal and/or the auxiliary synchronous signal into a port of a demodulation reference signal on a physical resource block which transmits the sub-frame and carries the synchronous signal.

In practice, the synchronization signal may be mapped to the demodulation reference signal in various ways. For example, the method for mapping the primary synchronization signal and/or the secondary synchronization signal to the demodulation reference signal includes at least one of the following ways:

the master synchronization signal is mapped to one of demodulation reference signal ports 7, 8, 9, and 10.

The secondary synchronization signal is mapped to one of demodulation reference signal ports 7, 8, 9, and 10.

The primary and secondary synchronization signals are mapped to some two of the demodulation reference signal ports 7, 8, 9, 10.

The primary synchronization signal and the secondary synchronization signal are simultaneously mapped to one of demodulation reference signal ports 7, 8, 9, and 10.

The receiving end determines the ports used by the primary synchronization signal and the secondary synchronization signal based on the indication information sent by the network side or the standard default configuration. The port 7 is preferred to be a main synchronous signal in the default configuration; preferably port 8 is a secondary synchronization signal.

As a preferred embodiment, in the above synchronization signal transmission subframe and the physical resource block carrying the synchronization signal, when transmitting on the basis of the demodulation reference signal port, the RE occupied by the demodulation reference signal port is the RE used for the primary or secondary synchronization signal, and the sequence used by the port is the sequence corresponding to the primary or secondary synchronization signal. Wherein the demodulation reference signal port is one of slave ports 7, 8, 9, 10.

As another preferred embodiment, in the above-mentioned synchronization signal transmission subframe, and the physical resource block carrying the synchronization signal, when transmitting based on the demodulation reference signal port M and the port N, the RE occupied by the demodulation reference signal port M is the RE used for the primary synchronization signal (or the secondary synchronization signal), and the sequence used by the port M is the sequence corresponding to the primary synchronization signal (or the secondary synchronization signal). The RE occupied by the demodulation reference signal port N is the RE used for the secondary synchronization signal (or the primary synchronization signal), and the sequence used by the port N is the sequence corresponding to the secondary synchronization signal (or the primary synchronization signal). Where M and N are each selected from one of ports 7, 8, 9, 10, and may be the same.

In implementation, in order to improve the accuracy of signal processing, when the primary and/or secondary synchronization signals are used as demodulation reference signals of the port M and/or the port N, the same weight value is used for precoding between the physical resource blocks carrying the synchronization signals and the synchronization signals.

As another preferred embodiment, when a single user transmits on a physical resource block carrying a synchronization signal and a synchronization signal transmission subframe, the maximum number of layers for scheduling user data transmission is limited not to exceed 2. And on a physical resource block which transmits the sub-frame and carries the synchronous signal, limiting the number of each scheduling user layer to be 1 during multi-user multiplexing transmission, and respectively transmitting the physical resource block based on the main synchronous signal and the auxiliary synchronous signal as a demodulation reference signal port.

In the above preferred embodiment, the network side indicates the allocation of the ports and the number of layers through the downlink control information of the downlink control channel. And the network side informs the UE of the weight information, the ports and the distribution condition of the layer number used by the PSS/SSS through a high-level signaling. When an enhanced physical downlink control channel (ePDCCH) is sent in a PRB pair carrying a primary or secondary synchronization signal, the port number may be agreed in advance to be fixed.

Preferred embodiment four

The present preferred embodiment provides a UE side (receiving side) receiving processing method for configuration in which a synchronization signal is used as a demodulation reference signal, the method corresponds to the network side in the third preferred embodiment, and for the receiving side, the following operations are performed: on a physical resource block where a synchronization signal is transmitted in a subframe and carries the synchronization signal, a terminal (receiving side or UE) performs channel estimation required for data demodulation based on primary and/or secondary synchronization signals.

As a preferred embodiment, the channel estimation required for data demodulation by using the primary synchronization signal and/or the secondary synchronization signal is at least one of the following ways:

using the primary (or secondary) synchronization signal as a channel estimate for the demodulation reference signal port 7;

using the secondary (or primary) synchronization signal as a channel estimate for the demodulation reference signal port 8;

the primary (or secondary) synchronization signal is used as the channel estimation of the demodulation reference signal port 7, and the secondary (or primary) synchronization signal is used as the channel estimation of the demodulation reference signal port 8;

using the primary synchronization signal as a channel estimate for one of demodulation reference signal ports 7, 8, 9, 10;

using the primary synchronization signal and the secondary synchronization signal as channel estimation of two of the demodulation reference signal ports 7, 8, 9 and 10;

the primary synchronization signal and the secondary synchronization signal are simultaneously used as channel estimation of one of demodulation reference signal ports 7, 8, 9 and 10;

the receiving end determines the ports used by the primary synchronization signal and the secondary synchronization signal based on the indication information sent by the network side or the standard default configuration. The port 7 is preferably selected as a main synchronizing signal during the default configuration; preferably port 8 is a secondary synchronization signal.

As a preferred embodiment, on a synchronization signal transmission subframe and a physical resource block carrying a synchronization signal, when performing channel estimation based on a demodulation reference signal port, a UE expects that REs occupied by the demodulation reference signal port are REs used for a primary synchronization signal (or a secondary synchronization signal), and a sequence used by the port is a sequence corresponding to the primary synchronization signal (or the secondary synchronization signal). Wherein, the demodulation reference signal port is one of slave ports 7, 8, 9 and 10.

As another preferred embodiment, in the above-mentioned synchronization signal transmission subframe, and the physical resource block carrying the synchronization signal, when performing channel estimation based on the demodulation reference signal port M and the port N, the RE occupied by the demodulation reference signal port M is expected by the UE to be the RE used for the primary synchronization signal (or the secondary synchronization signal), and the sequence used by the port M is the sequence corresponding to the primary synchronization signal (or the secondary synchronization signal). The RE occupied by the demodulation reference signal port N is the RE used for the secondary synchronization signal (or the primary synchronization signal), and the sequence used by the port N is the sequence corresponding to the secondary synchronization signal (or the primary synchronization signal). Where M and N are each selected from one of ports 7, 8, 9, 10, and may be the same.

Preferably, on the above-mentioned synchronization signal transmission subframe and on the physical resource block carrying the synchronization signal, when the UE uses the primary and/or secondary synchronization signal as the channel estimation of the port M and/or the port N, the UE expects the precoding weights corresponding to the demodulation reference signals on the above-mentioned physical resource block to be the same. Where M and N are each selected from one of ports 7, 8, 9, 10, and may be the same.

In a preferred embodiment, the number of layers that the UE desires to transmit data in the physical resource block carrying the synchronization signal is 2 or less in the synchronization signal transmission subframe.

Preferably, the terminal (receiving end) receives the downlink control information through the downlink control channel, and obtains the number of layers and the use mode of the demodulation reference signal port; or, the network side informs the UE of the weight information, the port and the layer number distribution condition used by the PSS/SSS through a high-level signaling; or, when the ePDCCH is transmitted in a PRB pair carrying a primary or secondary synchronization signal, the port number may be agreed in advance.

Preferred embodiment five

In the preferred embodiment, the network side precodes the PSS, SSS or (PSS and SSS) to be transmitted and then transmits using a single antenna port. The matrix adopted during precoding is a precoding matrix used by a DMRS of one antenna port in a plurality of PRB pairs for bearing a PSS and/or a SSS; the DMRS for the 1 antenna port is configured and used in all of the PRB pairs, and the precoding matrices used in the PRB pairs are the same (the precoding matrices and the precoding weights are equivalent).

As a preferred embodiment, for the transmitted PSS or SSS or PSS and SSS to be precoded, one of the antenna ports 7, 8, 9, and 10 may be selected. Or, the network side and the receiving side may agree in advance, for example, agree through a standardized protocol to use one of the ports.

As another preferred embodiment, the configuration may also be performed through signaling, for example, when the network side schedules and uses a PRB pair carrying the PSS and/or the SSS as the receiving end, the network side may notify the receiving end of the antenna port information and the precoding matrix information used by the PRB pair scheduled by the receiving end, and at this time, configure the precoding matrix, the antenna port, and the DMRS information according to the PSS and/or the SSS, so that the antenna port and the precoding matrix used in the PSS and/or the SSS transmission may be known.

In implementation, when a PRB pair for transmitting data allocated by a network side for a receiving end is a PRB pair carrying a PSS and/or a SSS, the receiving end receives its own data from the PRB pair for transmitting data, receives the PSS and/or the SSS and the DMRS in the PRB pair for transmitting data, and demodulates the data using the received PSS and/or the SSS and the DMRS. At this time, the receiving end defaults that the precoding matrix used by the PSS and/or the SSS received in the PRB pair is the same as the DMRS precoding matrix received in the PRB pair. The receiving end defaults that the PSS and/or SSS received in the PRB pair uses the same antenna port as the DMRS received from the PRB pair.

Preferably, the network side and the receiving end are in a PRB pair carrying the PSS and/or the SSS, when the DMRS in the OFDM symbol conflicts with the PSS and/or SSS resources, the network side stops transmitting the DMRS, and the receiving end considers that the network side does not transmit the DMRS in the resources.

Preferably, the PSS and/or SSS, DMRS received by the receiving end in the PRB pair carrying the PSS and/or SSS are jointly used for demodulation of user data and control signaling. For example: the receiving end may regard the PSS and/or SSS as being used by the DMRS whose transmission was stopped. In particular, only the PSS and/or SSS on the same subcarrier as the DMRS received from the PRB pair carrying the PSS and/or SSS may be used, which is the same as the DMRS transmission stop. Or the received PSS and/or SSS are all used for data demodulation.

Preferred embodiment six

In the preferred embodiment, the network side precodes the PSS or the SSS to be transmitted, or the PSS and the SSS, and then transmits using a single antenna port. The matrix adopted during precoding is a precoding matrix used by a DMRS of one antenna port in a plurality of PRB pairs for bearing a PSS and/or a SSS. Wherein the DMRS of the 1 antenna port is configured and used in the plurality of PRB pairs, and the precoding matrix used in the plurality of PRB pairs is different.

For the above method, different precoding matrices used in the plurality of PRB pairs inevitably affect the performance of UE for sounding PSS and/or SSS, but if the values of the precoding matrices are relatively close, the impact on the performance of UE for sounding PSS and/or SSS is also relatively small, which may also be implemented at this time. At this time, the performance of the UE for jointly demodulating data by using the PSS and/or the SSS and the DMRS is improved, and the network side can configure a proper precoding matrix in the plurality of PRB pairs according to the actual situation, so that the demodulation performance of the UE is improved.

In practice, the location at which the PSS and/or SSS are sent may be determined according to the system configuration, for example:

the first method is as follows: for the LTE FDD system, if the standard CP configuration is used, the network side transmits the PSS subjected to precoding processing on symbol #6 of subframes #0 and #5 (symbol numbers within the subframes start from # 0), and/or transmits the SSS subjected to precoding processing on symbol #5 of subframes #0 and # 5. The frequency domain of PSS and/or SSS still performs according to the existing LTE R8 protocol. At this time, the DMRS is stopped from being transmitted in symbols #5 and #6 in the PRB pair carrying the PSS and/or SSS. For the LTE TDD system, if the standard CP configuration is used, the network side transmits the precoded SSS on symbol #13 of subframes #0 and #5 and/or on symbol #2 of subframes #1 and # 6. At this time, the DMRS in symbol #13 in the PRB pair carrying the PSS stops being transmitted, and similarly, if the DMRS is originally configured in the PRB pair carrying the SSS, the DMRS also needs to stop being transmitted.

The second method comprises the following steps: in an LTE FDD or TDD system, and when a standard CP is configured, the network transmits a precoding processed PSS on symbols (referred to as OFDM symbols) #3 of subframes #0 and #5 and/or a precoding processed SSS on symbols #2 of subframes #0 and # 5. At this time, for FDD systems, DMRS is transmitted on symbols #5 and #6 of PRB pairs carrying PSS and/or SSS. DMRS is transmitted on symbol #13 of a PRB pair carrying SSS for TDD systems.

The third method comprises the following steps: in the LTE FDD or TDD system, when configuring the standard CP, the network side transmits the precoded PSS on symbol #8 of subframes #0 and #5 and/or the precoded SSS on symbol #1 of subframes #0 and # 5. At this time, for FDD systems, the network side transmits DMRS on symbols #5 and #6 of PRB pairs carrying PSS and/or SSS. For the TDD system network side, DMRS is transmitted in symbol #13 of the PRB pair carrying SSS.

The method is as follows: in the LTE FDD system, when configuring the standard CP, the network side transmits the PSS for precoding processing on symbol #8 of subframes #0 and #5 and/or transmits the SSS for precoding processing on symbol #3 of subframes #0 and # 5. The DMRS is transmitted at this time in symbols #5 and #6 in the PRB pair carrying the PSS and/or SSS. In the LTE TDD system, when configuring the standard CP, the network side transmits the SSS processed by precoding on symbol #8 of subframes #0 and #5 and/or transmits the PSS processed by precoding on symbol #0 of subframes #1 and # 6. At this time, the DMRS is transmitted in symbol #13 in a PRB pair carrying SSS.

Preferred embodiment seven

The preferred embodiment provides a configuration and transmission method of a synchronization signal, which implements transmission of the synchronization signal, and describes a case of a single antenna port. In this embodiment, a processing method of a receiving end is described, where the receiving end includes a device for receiving a network side synchronization signal, for example: mobile phones, relay nodes, small cells, and the like.

In this embodiment, a receiving end receives a PSS and/or a SSS that is precoded in an allocated PRB pair and is used to demodulate downlink data in the allocated PRB pair. The allocated PRB pair refers to an RPB pair allocated by the network side for the UE to transmit downlink data or control signaling, and the PRB pair has PSS and/or SSS configuration for transmission. The data is transmitted through the PDSCH, and the control signaling mainly refers to ePDCCH signaling. The receiving end uses a single antenna port for receiving, wherein the single antenna port can be predetermined, and is specifically port 7 or port 8 or port 9 or port 10.

In this embodiment, a receiving end considers that, for a PSS and/or a SSS subjected to precoding processing, a used precoding matrix is a precoding matrix used by DMRs of one antenna port in multiple PRB pairs carrying the PSS and/or the SSS, and the DMRs of this port is used in the PRB pair carrying the PSS and/or the SSS, and the used precoding matrices are the same.

Preferably, if the PRB pair is a PRB pair carrying the PSS and/or SSS, the receiving end receives the PSS and/or SSS and DMRS therein at the same time when receiving the downlink data from the PRB pair, and demodulates the downlink data using the received PSS and/or SSS and DMRS at the same time. And the receiving end defaults that a precoding matrix used by the PSS and/or the SSS received from the PRB pair is the same as that of the DMRS received from the PRB pair, antenna ports are the same, and the OFDM symbols bearing the PSS and/or the SSS in the PRB pair stop transmitting the DMRS.

Preferred embodiment eight

The preferred embodiment provides a configuration and transmission method of a synchronization signal, which realizes transmission of the synchronization signal, and describes a case where a PSS and/or an SSS is transmitted using 2 or more than 2 antenna ports.

The method in the preferred embodiment comprises: and the network side precodes the PSS and/or the SSS and then transmits the PSS and/or the SSS, wherein the precoding matrix adopted by the precoding is used by the DMRS of certain 2 or more than 2 proposed ports in a plurality of PRB pairs for bearing the PSS and/or the SSS. Wherein the DMRSs of the certain 2 or more than 2 day ports are used in the plurality of PRB pairs and the precoding matrices in the plurality of PRB pairs are the same. The 2 or more than 2 antenna ports are formed by configuring and combining a port 7, a port 8, a port 9 and a port 10.

For a receiving end, determining (considering) that a precoding matrix used by a PSS and/or a SSS received from a port in the PRB pair is the same as a precoding matrix of a DMRS received from the port in the PRB pair. For example, the receiving end uses the same precoding matrix for PSS and/or SSS received from port 7 in the PRB pair as the DMRS received from port 7 in the PRB pair.

Preferably, for the PSS and/or the SSS precoding, subcarriers carrying the PSS and/or the SSS may be grouped, subcarriers of each group are transmitted using different antenna ports, and a precoding matrix corresponding to a DMRS of the antenna port is used to precode the PSS and/or the SSS transmitted in the group of subcarriers. For a particular grouping, the subcarriers carrying the PSS and/or SSS are grouped into groups, where the subcarriers are numbered odd and even. Or grouping the PRBs in PRB pair units, and dividing the PRBs carrying the PSS and/or the SSS into a plurality of groups. The packets, wherein the number of packets is less than or equal to the number of antenna ports used and/or transmitting the PSS.

Preferably, for the case of PSS and/or SSS of a multi-day port, the receiving end determines a PRB pair allocated for itself by the network side for transmitting data, and if the PRB pair carries the PSS and/or SSS, the receiving end receives its data from the PRB pair, and simultaneously receives PSS and/or SSS, DMRS in the PRB pair, and simultaneously demodulates data using the PSS and/or SSS, DMRS.

As another preferred embodiment, the following implementation may also be implemented for the case where PSS and/or SSS are transmitted using multiple antenna ports.

And the network side precodes the PSS and/or the SSS and then transmits the PSS and/or the SSS, wherein the precoding matrix is used by the DMRS of certain 2 or more than 2 proposed ports in a plurality of PRB pairs for bearing the PSS and/or the SSS. Wherein the DMRS of the certain 2 or more antenna ports are used in the plurality of PRB pairs and the precoding matrices in the plurality of PRB pairs are different. For this case, different precoding matrices used in the plurality of PRB pairs necessarily affect the performance of UE sounding PSS and/or SSS, but if the values of the precoding matrices are relatively close, the impact on the performance of UE sounding PSS and/or SSS is also relatively small, which may also be implemented. At this time, the performance of the UE for jointly demodulating data by using the PSS and/or the SSS and the DMRS is improved, and the network side can configure a proper precoding matrix in the plurality of PRB pairs according to the actual situation, so that the demodulation performance of the UE is improved.

In this embodiment, for transmitting the precoded PSS and/or SSS using 2 or more ports, the receiving end performs the following processing:

the receiving end receives the PSS and/or SSS which are processed by precoding from the allocated PRB pair by using (or through) 2 or more than 2 antenna ports, and is used for demodulating the downlink data in the allocated PRB pair. The allocated PRB pair refers to a PRB pair allocated by a network for the UE through downlink authorization signaling, and is used for transmitting downlink data, and PSS and/or SSS configuration transmission exists in the PRB pair. The use of 2 or more than 2 antenna ports means that the antenna ports are predetermined and are 2 or more than 2 combinations of the ports 7, 8, 9 and 9. And the precoding matrix used by precoding is a precoding matrix used by a DMRS of 2 or more than 2 antenna ports in a plurality of PRB pairs for bearing the PSS and/or the SSS. And the DMRSs of the certain 2 or more than 2 antenna ports are used in the plurality of PRB pairs, and the used precoding matrixes are the same.

Preferably, the downlink data includes user plane data and control plane signaling. The PSS and/or SSS received by the receiving end from different ports in the PRB pair uses the same precoding matrix as the DMRS received from the corresponding port in the PRB pair. For example, the PSS and/or SSS received from the PRB pair using port 7 by the receiving end uses the same precoding matrix as the DMRS received from the PRB pair using port 7.

As another preferred embodiment, if the network side groups the subcarriers carrying the PSS and/or the SSS, and different groups use one port and the corresponding precoding matrix to transmit the PSS and/or the SSS, the receiving end needs to determine the subcarriers of each group, the ports used by the subcarriers of each group, and the corresponding precoding matrix according to the agreed subcarrier grouping principle, and then demodulate the downlink data therein by combining the DMRSs in the PRB pair.

As another preferred embodiment, if the network side groups PRB pairs carrying the PSS and/or SSS, and different groups use one port and a corresponding precoding matrix to transmit the PSS and/or SSS, the receiving end needs to determine PRB pairs of each group, ports used by PRB pairs of each group, and a corresponding precoding matrix according to an agreed PRB pair grouping principle, and then demodulate downlink data in the PRB pairs by combining the DMRSs in the PRB pairs.

Preferred embodiment nine

The preferred embodiment provides a method for configuring and transmitting a synchronization signal used as a demodulation reference signal.

In the preferred embodiment, the method comprises: the network side maps a PSS (primary synchronization signal) and/or a SSS (secondary synchronization signal) to a port of a demodulation reference signal on a Physical Resource Block (PRB) pair carrying the synchronization signal. Thus, the UE can process the PSS/SSS signal transmitted by the network side according to the port of the demodulation reference signal, so as to demodulate the data in the PRB pair, including control signaling or user data.

In implementation, mapping PSS and/or SSS to demodulation reference signals may be performed in various ways, for example: the network side maps the PSS to one of the demodulation reference signal ports 7, 8, 9, and 10, for example, the network side is agreed to map the PSS to the demodulation reference signal port 7. Or mapping SSS to one of demodulation reference signal ports 7, 8, 9, 10, e.g. agreeing to map SSS to demodulation reference signal port 8. Or to map PSS and SSS to some two of ports 7, 8, 9, 10 for demodulation reference signals, e.g. to agree when two antenna ports are selected, to map PSS and SSS to demodulation reference signal port 7 and port 8. Or mapping PSS and SSS to one of demodulation reference signal ports 7, 8, 9, 10 at the same time, for example, it is agreed to map PSS and SSS to demodulation reference signal port 7 at the same time. The receiving end determines the ports used by the PSS and SSS based on the indication information sent by the network side or the default configuration of the standard (i.e. the prior agreement). In the default configuration, the port 7 is preferably selected to map the demodulation reference signal for the PSS; port 8 is preferred to map demodulation reference signals for SSS.

Preferably, when the PSS/SSS is transmitted based on the demodulation reference signal port, the RE (resource element) occupied by the demodulation reference signal port is the RE used for the PSS or SSS signal, and all sequences of the ports are the sequences corresponding to the PSS or SSS. Wherein, the demodulation reference signal port is one of 7, 8, 9 and 10. Such as the contract port 7.

As another preferred embodiment, a network side synchronization signal transmits a subframe, and in a PRB pair carrying a synchronization signal, when a PSS/SSS is transmitted based on a demodulation reference signal port M and a port N, an RE occupied by the demodulation reference signal port M is an RE used for the PSS (or SSS), and a sequence used by the port M is a sequence corresponding to the PSS (or SSS). RE occupied by a demodulation reference signal port N is RE used for SSS (or PSS), and the sequence used by the port N is a sequence corresponding to SSS (or PSS). Where M and N are each selected from one of ports 7, 8, 9, 10, and may be the same.

Preferably, when the primary and/or secondary synchronization signals are used as demodulation reference signals of the port M and/or the port N, the same weight values are used for precoding between the PRB pairs carrying the synchronization signals and the synchronization signals in the synchronization signal transmission subframe.

Preferably, when the synchronization signal is transmitted in a subframe and is carried on a PRB pair of the synchronization signal, but is used for transmission, the maximum number of layers scheduled for data transmission is limited to not exceed 2. And on a PRB pair which carries the synchronization signal and transmits the synchronization signal, limiting the number of each scheduling user layer to be 1 during multi-user multiplexing transmission, and respectively transmitting the synchronization signal based on a main synchronization signal and an auxiliary synchronization signal as a demodulation reference signal port.

As a preferred embodiment, the network side indicates the allocation condition of the ports and the number of layers through downlink control information of a downlink control channel; or, the network side informs the UE of the weight information, the port and the layer number distribution condition used by the PSS/SSS through a high-level signaling; or, when the ePDCCH is sent in a PRB pair carrying a primary or secondary synchronization signal, the port number may be agreed in advance to be fixed. In order to reduce the number of times the UE retrieves the ePDCCH.

In this embodiment, the UE side uses the synchronization signal as the demodulation reference signal in the following manner:

the first method is as follows: and on the PRB pair which carries the synchronization signal and is transmitted by the synchronization signal, the receiving end carries out channel estimation required by data demodulation based on the PSS and/or the SSS. Specifically, the channel estimation required for data demodulation using PSS and/or SSS is to use PSS (or SSS) as the channel estimation for demodulation reference signal port 7 (or port 8, or port 9, or port 10). Or SSS is used as channel estimate for demodulation reference signal port 8 (or port 7, or port 9, or port 10). Or the primary (or secondary) synchronization signal is used as the channel estimation of the demodulation reference signal port 7, and the secondary (or primary) synchronization signal is used as the channel estimation of the demodulation reference signal port 8.

The second method comprises the following steps: the primary synchronization signal is used as a channel estimate for one of the demodulation reference signal ports 7, 8, 9, 10. Or the primary synchronization signal and the secondary synchronization signal are used as channel estimates for two of the demodulation reference signal ports 7, 8, 9, 10. Or the primary synchronization signal and the secondary synchronization signal are simultaneously used as the channel estimation of one of the demodulation reference signal ports 7, 8, 9 and 10. The receiving end determines the ports used by the primary synchronization signal and the secondary synchronization signal based on the indication information sent by the network side or the standard default configuration. The port 7 is preferably selected as a main synchronous signal during the default configuration; preferably port 8 is a secondary synchronization signal.

The third method comprises the following steps: on a PRB pair carrying a synchronization signal and a synchronization signal in a synchronization signal transmission subframe, when performing channel estimation based on a demodulation reference signal port, an RE that a UE expects the demodulation reference signal port to occupy is an RE used for a primary synchronization signal (or a secondary synchronization signal), and a sequence used by the port is a sequence corresponding to the primary synchronization signal (or the secondary synchronization signal). Wherein the demodulation reference signal port is one of slave ports 7, 8, 9, 10. Such as port 7.

The method is as follows: in the synchronization signal transmission subframe and the PRB pair carrying the synchronization signal, when performing channel estimation based on the demodulation reference signal port M and the port N, the RE occupied by the demodulation reference signal port M is expected by the UE to be the RE used for the primary synchronization signal (or the secondary synchronization signal), and the sequence used by the port M is the sequence corresponding to the primary synchronization signal (or the secondary synchronization signal). The RE occupied by the demodulation reference signal port N is the RE used for the secondary synchronization signal (or the primary synchronization signal), and the sequence used by the port N is the sequence corresponding to the secondary synchronization signal (or the primary synchronization signal). Where M and N are each selected from one of ports 7, 8, 9, 10, and may be the same.

The fifth mode is as follows: on the PRB pair carrying the synchronization signal and in which the synchronization signal is sent, when the UE uses the primary and/or secondary synchronization signal as the channel estimation of the port M and/or the port N, the UE expects the precoding weights corresponding to the demodulation reference signals on the resource block to be the same. Where M and N are each selected from one of ports 7, 8, 9, 10, and may be the same.

As a preferred embodiment, on the PRB pair carrying the synchronization signal and transmitting the subframe by the synchronization signal, the number of layers for which the UE expects data transmission is less than or equal to 2; or, the receiving end receives the downlink control information through the downlink control channel, and obtains the number of layers and the use mode of the demodulation reference signal port. Or the network side informs the UE of the weight information, the ports and the layer number distribution condition used by the PSS/SSS through a high-level signaling; or, when the ePDCCH is sent in a PRB pair carrying a primary or secondary synchronization signal, the port number may be agreed in advance to be fixed.

Preferred embodiment ten

In this embodiment, there is provided a method of transmitting PSS and/or SSS. The method comprises the following steps: the network side configuration can configure the transmit PSS and/or SSS in the following manner in the new carrier.

In the preferred embodiment, the network side configures the PSS and/or the SSS to use the same precoding matrix as the DMRS, and transmits the PSS and/or the SSS and the DMRS processed by using the precoding matrix using antenna port 7 (or port 8 or port 9 or port 10). The DMRS is used in PRB pairs carrying PSS and/or SSS, and precoding matrixes are the same.

For example, the network side and the UE agree to use a fixed antenna port, for example, agree to use a fixed port 7 (or port 8 or port 9 or port 10). The network side transmits PSS and/or SSS by using a port 7 (or a port 8 or a port 9 or a port 10), and precoding processing is adopted for the PSS and/or SSS, wherein the used precoding matrix is the precoding matrix of the DMRS corresponding to the port 7. The position corresponding to the PSS and/or the SSS refers to a PSS and/or a SSS mapping position specified in LTE R11 (the same as R8, R9, and R10 versions), and specifically, reference may be made to the LTE 36.211 protocol, which is not described herein again.

In implementation, preferably, the network side determines the number of ports and port numbers used by DMRSs in 6 middle RBs, and when the number of ports is determined to be 1 and the port number is determined to be 7, the network side performs precoding processing on PSS and/or SSS by using a precoding matrix corresponding to the DMRS of the port 7, and then transmits the precoded PSS and/or SSS by using the port 7. For FDD, at this time the PSS and/or SSS collide with the DMRS on OFDM symbols 5, 6 (coded from 0) of subframes #0 and #5, at this time the DMRS on OFDM symbols 5, 6 is no longer transmitted, but the precoded PSS and/or SSS data is transmitted. The receiving end and the network side have agreed in advance that the single antenna port is used and the precoding matrix which is the same as the DMRS of the port is used for precoding, so the receiving end can process the data in the following mode. According to different purposes, the receiving end is divided into a cell to search for synchronization and receives demodulation data.

Preferably, for a UE with cell search and synchronization, an old-version UE (assuming that the UE can access a new carrier) still receives PSS and/or SSS according to an original manner, and in the original manner, the UE does not know which port is specifically used by the network side to transmit PSS and/or SSS, so that all single ports can be probed one by one to receive, which obviously is not beneficial for the UE to receive PSS and/or SSS. When the UE tries to receive the PSS and/or SSS using port 7, the UE receives the PSS/SSS processed by precoding, but since the cell search and synchronization are only related to the PSS and/or SSS sequences, it determines whether the PSS and/or SSS sequences are synchronized, because the precoding does not affect the determination of the related operations of the PSS and/or SSS sequences. The operation of the legacy UE is not affected. For the new-version UE, only the PSS and/or SSS sequence is received according to the appointed port 7 to perform relevant operation, whether synchronization is needed to be judged, and other ports do not need to be detected and received, so that the UE can receive the new-version UE conveniently.

For the UE receiving the PSS and/or the SSS for demodulating data, the UE receives the PSS and/or the SSS at a port 7 according to a convention, then performs de-precoding matrix processing on the received PSS and/or the SSS, and then uses the received PSS and/or the SSS for demodulating corresponding data with the remaining DMRS.

Description of the preferred embodiment

In this embodiment, there is provided a method of transmitting PSS and/or SSS. The preferred embodiment describes the case of using 2 antenna ports to transmit PSS and/or SSS, and the method is as follows:

when the network side determines to use two ports to transmit the PSS and/or SSS, the network side groups the subcarriers carrying the PSS and/or SSS data, one antenna port is configured for each group of subcarriers, precoding processing is carried out on the PSS and/or SSS data carried on the group of subcarriers by using the precoding matrix of the DMRS of the antenna port configured by the group of subcarriers, and then the precoded PSS and/or SSS data are transmitted by using each group of antenna ports. The subcarriers carrying PSS and/or SSS data are specifically in the LTE related protocol (TS 36.211, and the mapping positions of the subcarriers of PSS and/or SSS in LTE R8 to R11 are the same), which is not described herein again.

Preferably, the candidate antenna ports are port 7, port 8, port 9 and port 10. The subcarriers may be grouped, and the grouping into 2 groups or 4 groups is proposed, for example, when the grouping into 2 groups, the grouping into odd groups and even groups is based on the subcarrier numbers.

For example, when the network side is to transmit PSS and/or SSS using two antenna ports, e.g., about fixed port 7 and port 8, the network side divides the subcarriers carrying PSS and/or SSS into 2 groups by odd and even numbers of the subcarriers, and each group uses one port, e.g., odd groups use port 7, even groups use port 8, and for PSS and/or SSS data carried in each group of subcarriers, the precoding matrix of the DMRS of the corresponding port of the group is used. And then after precoding processing, PSS and/or SSS data are transmitted in corresponding subcarriers by using corresponding ports.

In implementation, the network side determines the port number and the port number used by the DMRS in the middle 6 RBs, when the port number is determined to be 2 and the port numbers are 7 and 8, the network side divides the subcarriers carrying the PSS and/or the SSS into an odd group and an even group according to the numbers, the odd group is transmitted using the port 7, the even group is transmitted using the port 8, and the PSS and/or the SSS data carried in the odd group subcarriers are precoded using the DMRS precoding matrix of the port 7 corresponding to the odd group, the PSS and/or the SSS data carried in the even group subcarriers are precoded using the DMRS precoding matrix of the port 8 corresponding to the even group, and then the processed PSS and/or the SSS data are transmitted using the port 7 and the port 8, respectively. For FDD, at this time the PSS and/or SSS collide with the DMRS on OFDM symbols 5, 6 (numbered from 0) of subframes #0 and #5, at this time the DMRS on OFDM symbols 5, 6 is no longer transmitted, but the precoded PSS and/or SSS data is transmitted. The receiving end and the network side agree in advance to use the 2-antenna port to transmit the PSS and/or the SSS, and use the precoding matrix of the DMRS corresponding to the port to perform precoding processing, so the receiving end can process the data in the following way. The receiving end is divided into a cell search purpose, a synchronization purpose, and a purpose of receiving demodulated data according to different purposes.

For the new-version UE, the UE receives PSS and/or SSS data through a port 7 and a port 8, then according to the prearranged condition, the PSS and/or SSS data in the subcarriers with odd numbers use the precoding matrix of the DMRS corresponding to the port 7 to perform de-precoding processing, and the PSS and/or SSS data in the subcarriers with even numbers use the precoding matrix of the DMRS corresponding to the port 8 to perform de-precoding processing. The demodulation of data can also be performed by combining the PSS and/or SSS in odd subcarriers with the DMRS in the OFDM symbols 12, 13 in the RB. The specific demodulation process is the same as demodulation directly using the DMRS, and at this time, only the PSS and/or SSS data need to be treated as the DMRS.

Preferred embodiment twelve

In the present embodiment, a method of transmitting PSS and/or SSS is provided. In the preferred embodiment, the network side and the receiving end agree that the synchronization signal is sent by using the port 7 and the port 8, and the method is as follows: and the network side maps the PSS and the SSS into a port 7 and a port 8 of a demodulation reference signal respectively and transmits the demodulation reference signal on a PRB pair carrying the PSS/SSS signal in a synchronization signal transmission subframe. Meanwhile, the network side transmits the DMRS by using the port 7 and the port 8 in the PRB pair. At this time, the same weight value is used between the PRB pairs carrying the PSS and the SSS for precoding processing. The weight is the same as the weight of the DMRS in the PRB pair.

In this embodiment, the receiving end defaults to transmit PSS and SSS using port 7 and port 8, respectively, and takes PSS and SSS as channel estimates for demodulation reference signal port 7 and port 8. The receiving end expects (considers) that the RE occupied by the demodulation reference signal is the RE of the PSS and the SSS, and the used sequence is the corresponding sequence of the PSS and the SSS.

In this embodiment, the receiving end uses PSS and SSS received from port 7 and port 8 in conjunction with DMRS received from port 7 and port 8 in the PRB pair for channel estimation. And the PSS and SSS in the port 7 and the port 8 are the same in weight value used by the DMRS in the port 7 and the port 8 in the PRB pair respectively by default at the receiving end.

Thirteen preferred embodiments

In the present embodiment, a method of transmitting PSS and/or SSS is provided. In the preferred embodiment, the network side and the receiving end agree, and the synchronization signal is sent by using the port 7, the method includes: in a synchronization signal transmission subframe, and on a PRB pair carrying a PSS/SSS signal, the network side maps the PSS and the SSS into a port 7 of a demodulation reference signal and transmits the demodulation reference signal. Meanwhile, the network side also transmits the DMRS using port 7 in the PRB pair. At this time, the same weight value is used between the PRB pairs carrying the PSS and the SSS for precoding processing. The weight is the same as the weight of the DMRS of the port 7 in the PRB pair.

In this embodiment, the receiving end defaults that PSS and SSS are transmitted using port 7, respectively, and uses PSS and SSS as channel estimation of demodulation reference signal port 7. The receiving end expects (considers) that the RE occupied by the demodulation reference signal is the RE of the PSS and the SSS, and the used sequence is the corresponding sequence of the PSS and the SSS.

In this embodiment, the receiving end uses PSS and SSS received from port 7 jointly with DMRS received from port 7 in the PRB pair for channel estimation. And the PSS and the SSS in the default port 7 of the receiving end respectively use the same weight value with the DMRS in the port 7 of the PRB pair.

It should be noted that, considering that the DMRS ports for demodulating PDSCH in the current protocol are defined as antenna port 7, antenna port 8, antenna port 9, and antenna port 10, the DMRS ports for demodulating ePDCCH are defined as antenna port 107, antenna port 108, antenna port 109, and antenna port 110. Therefore, the corresponding antenna port set is selected according to the PDSCH or ePDCCH transmitted in the PRB pair carrying the PSS and/or the SSS. The DMRS port definition corresponding to the PDSCH is taken as an example for explanation in the present application.

By the embodiments, the method, the device and the system for processing the synchronization signal, and the method and the device for estimating the channel are provided, the PSS and/or the SSS are subjected to precoding processing, so that the PSS and/or the SSS can be jointly used for demodulating data with the DMRS in the PRB pair carrying the PSS and/or the SSS, the data demodulation performance in the PRB pair is improved, and for a new carrier, when the DMRS on the OFDM symbol which collides with the PSS and/or the SSS is knocked out in the middle 6 PRB pairs of the new carrier, the problem of degradation of the demodulation performance caused by knocking out part of the DMRS can be solved by adopting the PSS and/or SSS transmission mode provided by the invention.

It will be apparent to those skilled in the art that the modules or steps of the present invention described above may be implemented by a general purpose computing device, they may be centralized on a single computing device or distributed across a network of multiple computing devices, and alternatively, they may be implemented by program code executable by a computing device, such that they may be stored in a storage device and executed by a computing device, and in some cases, the steps shown or described may be performed in an order different than that described herein, or they may be separately fabricated into individual integrated circuit modules, or multiple ones of them may be fabricated into a single integrated circuit module. Thus, the present invention is not limited to any specific combination of hardware and software.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for transmitting a synchronization signal, comprising:

a network side uses the same antenna port to send a demodulation reference signal (DMRS) and a Primary Synchronization Signal (PSS) and/or a Secondary Synchronization Signal (SSS) in a subcarrier or a physical resource block which carries the PSS and/or the SSS;

wherein an antenna port transmitting the PSS is the same as an antenna port transmitting the SSS.

2. The method of claim 1, wherein the network side transmits the DMRS and the PSS and/or the SSS in subcarriers or physical resource blocks carrying the PSS and/or the SSS using the same antenna port in the subcarriers or physical resource blocks comprises one of:

antenna port 7, antenna port 8, antenna port 9, antenna port 10;

3. The method of claim 1, wherein the network side directly or indirectly indicates preset antenna ports corresponding to the primary synchronization signal and the secondary synchronization signal at a receiving end.

4. The method of claim 3, wherein the predetermined antenna port corresponding to the primary synchronization signal is antenna port 7, and the predetermined antenna port corresponding to the secondary synchronization signal is antenna port 8; or the preset antenna port corresponding to the primary synchronization signal is an antenna port 8, and the preset antenna port corresponding to the secondary synchronization signal is an antenna port 7.

5. The method of claim 1, wherein, when the PSS and/or SSS is used as a reference signal for a DMRS antenna port on the subcarrier or physical resource block carrying the PSS and/or SSS, REs occupied by the antenna port of the DMRS are Resource Elements (REs) occupied by the PSS and/or SSS, and a sequence used by the antenna port of the DMRS is a sequence used by the PSS and/or SSS, the antenna port of the DMRS is one of: antenna port 7, antenna port 8, antenna port 9, antenna port 10.

6. The method according to claim 1, characterized in that, when the PSS and/or the SSS are used as reference signals for DMRS antenna port M, antenna port N on physical resource blocks carrying the PSS and/or the SSS,

7. The method of claim 1, wherein when the PSS and/or the SSS are used as DMRS signals for the DMRS antenna port M and/or the antenna port N, the subcarriers or physical resource blocks carrying the PSS and/or the SSS are precoded using the same weights.

8. The method of claim 1, wherein on the subcarriers or physical resource blocks carrying the PSS and/or the SSS,

9. The method of claim 8,

the network side indicates the DMRS antenna ports and the distribution condition of the number of the layers through a downlink control channel; or

10. The method according to any one of claims 1 to 9,

the antenna port is a DMRS antenna port appointed by a standardized protocol; alternatively, the first and second electrodes may be,

11. A method for receiving a synchronization signal, comprising:

when a receiving end receives a Primary Synchronization Signal (PSS) and/or a Secondary Synchronization Signal (SSS) in a subcarrier or a physical resource block (PHS) carrying the PSS and/or the SSS, an antenna port used by the PSS and/or the SSS received from the subcarrier or the physical resource block is the same as an antenna port used by a demodulation reference signal (DMRS) received from the subcarrier or the physical resource block;

12. The method of claim 11, wherein when the receiving end receives the PSS and/or the SSS in the subcarrier or physical resource block carrying the PSS and/or the SSS, after defaulting that the antenna port used by the PSS and/or the SSS received from the subcarrier or physical resource block is the same as the antenna port used by the DMRS received from the subcarrier or physical resource block, the method further comprises one of:

13. The method of claim 12, wherein the receiving end determines the preset antenna ports corresponding to the primary synchronization signal and the secondary synchronization signal according to a direct or indirect indication from a network side.

14. The method of claim 13, wherein the predetermined antenna port corresponding to the primary synchronization signal is antenna port 7, and the predetermined antenna port corresponding to the secondary synchronization signal is antenna port 8; or the preset antenna port corresponding to the primary synchronization signal is an antenna port 8, and the preset antenna port corresponding to the secondary synchronization signal is an antenna port 7.

15. The method of claim 11, wherein when channel estimation is performed on the subcarriers or physical resource blocks carrying the PSS and/or the SSS using antenna ports of DMRS, REs occupied by antenna ports of DMRS desired by the receiving end is resource element RE occupied by the PSS and/or the SSS, and sequence used by antenna ports of the DMRS is sequence used by the PSS and/or the SSS, and antenna ports of the DMRS are one of: antenna port 7, antenna port 8, antenna port 9, antenna port 10.

16. The method of claim 11, wherein, when channel estimation is performed using DMRS antenna port M and DMRS antenna port N on the subcarriers or physical resource blocks carrying the PSS and/or the SSS,

17. The method of claim 11, wherein when channel estimation is performed on the DMRS antenna port M and the antenna port N using the PSS and/or the SSS, the receiving end expects DMRS on the subcarriers or physical resource blocks carrying the PSS and/or the SSS to have the same precoding weights.

18. The method of claim 11, wherein on the subcarriers or physical resource blocks carrying the PSS and/or the SSS,

19. The method of claim 18,

the receiving end acquires the DMRS antenna port and the distribution condition of the number of layers by receiving downlink control information of a downlink control channel; or

20. The method according to any one of claims 11 to 19,

21. A device for transmitting a synchronization signal, applied to a network side, comprising:

a first mapping module, configured to send, in a subcarrier or a physical resource block carrying a primary synchronization signal PSS and/or a secondary synchronization signal SSS, a demodulation reference signal DMRS and the PSS and/or the SSS in the subcarrier or the physical resource block using a same antenna port;

22. The apparatus of claim 21,

23. A receiving device of a synchronization signal is applied to a receiving end, and is characterized by comprising:

a third receiving module, configured to, when receiving a primary synchronization signal PSS and/or a secondary synchronization signal SSS in a subcarrier or a physical resource block carrying the PSS and/or the SSS, default that an antenna port used by the PSS and/or the SSS received from the subcarrier or the physical resource block is the same as an antenna port used by a demodulation reference signal DMRS received from the subcarrier or the physical resource block;

24. The apparatus of claim 23,

25. A system for processing a synchronization signal, comprising: a transmitting apparatus of a synchronization signal according to claim 21 or 22 and a receiving apparatus of a synchronization signal according to claim 23 or 24.