WO2016115904A1 - 发射方法及装置 - Google Patents

发射方法及装置 Download PDF

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Publication number
WO2016115904A1
WO2016115904A1 PCT/CN2015/088514 CN2015088514W WO2016115904A1 WO 2016115904 A1 WO2016115904 A1 WO 2016115904A1 CN 2015088514 W CN2015088514 W CN 2015088514W WO 2016115904 A1 WO2016115904 A1 WO 2016115904A1
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time domain
domain signal
primary synchronization
synchronization time
signal
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PCT/CN2015/088514
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English (en)
French (fr)
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袁红峰
李�杰
张文峰
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中兴通讯股份有限公司
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Publication of WO2016115904A1 publication Critical patent/WO2016115904A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/001—Synchronization between nodes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2602—Signal structure
    • H04L27/261—Details of reference signals
    • H04L27/2613—Structure of the reference signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2626—Arrangements specific to the transmitter only
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2647—Arrangements specific to the receiver only
    • H04L27/2655—Synchronisation arrangements
    • H04L27/2668—Details of algorithms
    • H04L27/2669—Details of algorithms characterised by the domain of operation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2647—Arrangements specific to the receiver only
    • H04L27/2655—Synchronisation arrangements
    • H04L27/2689—Link with other circuits, i.e. special connections between synchronisation arrangements and other circuits for achieving synchronisation
    • H04L27/2692—Link with other circuits, i.e. special connections between synchronisation arrangements and other circuits for achieving synchronisation with preamble design, i.e. with negotiation of the synchronisation sequence with transmitter or sequence linked to the algorithm used at the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/003—Arrangements to increase tolerance to errors in transmission or reception timing

Definitions

  • the present invention relates to the field of communications, and in particular to a transmitting method and apparatus.
  • Synchronization signal detection is required before the synchronization between the system side and the user equipment (UE) in the wireless communication.
  • the synchronization signal needs to have strong autocorrelation and low cross-correlation characteristics, so as to ensure the terminal equipment.
  • the base station can be accessed in the case of a low SINR (Signal to Interference plus Noise Ratio).
  • SINR Signal to Interference plus Noise Ratio
  • a primary synchronization signal and a secondary synchronization signal are designed.
  • the primary synchronization signal is used for coarse synchronization
  • the secondary synchronization signal is used to accurately determine the position of frame synchronization.
  • the base station transmits a signal the synchronization signal is processed online together with other non-synchronized signals, and the synchronization signal is relatively simple.
  • the embodiment of the invention provides a transmitting method and device, so as to at least solve the problem that the signal transmitting manner in the related art is relatively simple.
  • a method for transmitting includes: acquiring a time domain signal corresponding to a frequency domain signal other than a primary synchronization frequency domain signal; and storing from at least two primary synchronization time domain signals stored in advance Determining a primary synchronization time domain signal for weighting processing; adding the time domain signal and the weighted one of the primary synchronization time domain signals to transmit.
  • acquiring a time domain signal corresponding to the frequency domain signal other than the primary synchronization frequency domain signal includes: generating a frequency domain signal other than the primary synchronization frequency domain signal, and acquiring a time domain of converting the generated frequency domain signal signal.
  • the method further includes: converting the primary synchronization frequency domain signal into the primary synchronization time domain signal; and storing the conversion The latter primary synchronization time domain signal.
  • determining, by the pre-stored at least two primary synchronization time domain signals, a primary synchronization time domain signal for performing weighting processing comprises: selecting one primary from the pre-stored at least two primary synchronization time domain signals according to the cell identification ID Synchronous time domain signals are processed for power and phase weighting.
  • selecting one of the at least two primary synchronization time domain signals stored in advance according to the cell identifier ID Performing power and phase weighting processing on the primary synchronization time domain signals includes: selecting one primary synchronization time domain signal from the pre-stored at least two primary synchronization time domain signals according to the cell identification ID, by using the one primary synchronization time domain signal Multiplying with a complex number adjusts the power of the one primary synchronous time domain signal and the initial phase of the one primary synchronous time domain signal.
  • a transmitting apparatus including: an acquiring module, configured to acquire a time domain signal corresponding to a frequency domain signal other than a primary synchronization frequency domain signal; and a weighting processing module, configured to Determining, in a pre-stored at least two primary synchronization time domain signals, a primary synchronization time domain signal for weighting; and a transmitting module configured to add the time domain signal and the weighted one of the primary synchronization time domain signals Launch.
  • the acquiring module includes: an acquiring submodule, configured to generate a frequency domain signal other than the main synchronization frequency domain signal, and acquire a time domain signal that is to be converted by the generated frequency domain signal.
  • the apparatus further includes: a conversion module configured to convert the primary synchronization frequency domain signal into the primary synchronization time domain signal; and a storage module configured to store the converted primary synchronization time domain signal.
  • the weighting processing module includes: a weighting processing sub-module, configured to perform power and phase weighting processing by selecting one primary synchronization time domain signal from the pre-stored at least two primary synchronization time domain signals according to the cell identification ID.
  • the weighting processing sub-module includes: a processing unit configured to select one primary synchronization time domain signal from the pre-stored at least two primary synchronization time domain signals according to the cell identification ID, by using the one primary synchronization time Multiplying the domain signal by a complex number adjusts the power of the one primary synchronous time domain signal and the initial phase of the one primary synchronous time domain signal.
  • a time domain signal corresponding to a frequency domain signal other than the primary synchronization frequency domain signal is acquired; and a primary synchronization time domain signal is determined from the pre-stored at least two primary synchronization time domain signals for weighting processing; The time domain signal is added to the weighted and processed one of the main synchronous time domain signals to be transmitted, which solves the problem that the signal transmission mode is relatively simple in the related art, and the transmission mode is diversified.
  • FIG. 1 is a flow chart of a method of transmitting in accordance with an embodiment of the present invention
  • FIG. 2 is a block diagram of a transmitting device in accordance with an embodiment of the present invention.
  • FIG. 3 is a block diagram 1 of a transmitting device in accordance with a preferred embodiment of the present invention.
  • FIG. 4 is a block diagram 2 of a transmitting device in accordance with a preferred embodiment of the present invention.
  • FIG. 5 is a block diagram 3 of a transmitting device in accordance with a preferred embodiment of the present invention.
  • FIG. 6 is a block diagram 4 of a transmitting device in accordance with a preferred embodiment of the present invention.
  • FIG. 7 is a flow chart of LTE primary synchronization signal transmission in accordance with an embodiment of the present invention.
  • FIG. 1 is a flowchart of a transmitting method according to an embodiment of the present invention. As shown in FIG. 1, the process includes the following steps:
  • Step S102 acquiring a time domain signal corresponding to a frequency domain signal other than the primary synchronization frequency domain signal
  • Step S104 Determine a primary synchronization time domain signal from at least two primary synchronization time domain signals stored in advance for performing weighting processing
  • Step S106 adding the time domain signal and the one-master synchronization time domain signal subjected to the weighting process, and transmitting.
  • a frequency domain signal other than the primary synchronization frequency domain signal is generated, and the acquisition will generate The time domain signal of the frequency domain signal conversion.
  • Determining a primary synchronization time domain signal from the pre-stored at least two primary synchronization time domain signals for performing weighting processing In an optional embodiment, at least two mains are stored in advance according to the cell identification ID. A primary synchronous time domain signal is selected in the synchronous time domain signal for power and phase weighting.
  • one primary synchronization time domain signal is selected from the pre-stored at least two primary synchronization time domain signals according to the cell identification ID. And multiplying the primary synchronous time domain signal by a complex number to adjust the power of the one primary synchronous time domain signal and the initial phase of the one primary synchronous time domain signal.
  • the embodiment of the present invention further provides a transmitting device, which is used to implement the foregoing embodiments and preferred embodiments, and has not been described again.
  • a transmitting device which is used to implement the foregoing embodiments and preferred embodiments, and has not been described again.
  • module may implement a combination of software and/or hardware of a predetermined function.
  • the apparatus described in the following embodiments is preferably implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated.
  • FIG. 2 is a block diagram of a transmitting apparatus according to an embodiment of the present invention. As shown in FIG. 2, the method includes: an obtaining module 22, a weighting processing module 24, and a transmitting module 26. The following briefly describes each module.
  • the obtaining module 22 is configured to acquire a time domain signal corresponding to the frequency domain signal other than the primary synchronization frequency domain signal;
  • the weighting processing module 24 is configured to determine a primary synchronization time domain signal from the pre-stored at least two primary synchronization time domain signals for weighting processing;
  • the transmitting module 26 is configured to add the time domain signal and the weighted one of the main synchronous time domain signals to transmit.
  • the obtaining module 22 includes:
  • the obtaining sub-module 32 is configured to generate a frequency domain signal other than the primary synchronization frequency domain signal, and acquire a time domain signal to be converted by the generated frequency domain signal.
  • FIG. 4 is a block diagram 2 of a transmitting apparatus according to a preferred embodiment of the present invention. As shown in FIG. 4, the apparatus further includes:
  • the conversion module 42 is configured to convert the primary synchronization frequency domain signal into the primary synchronization time domain signal
  • the storage module 44 is configured to store the converted primary synchronization time domain signal.
  • FIG. 5 is a block diagram 3 of a transmitting apparatus according to a preferred embodiment of the present invention.
  • the weighting processing module 24 includes:
  • the weighting processing sub-module 52 is configured to perform power and phase weighting processing by selecting one primary synchronization time domain signal from at least two primary synchronization time domain signals stored in advance according to the cell identification ID.
  • FIG. 6 is a block diagram 4 of a transmitting apparatus according to a preferred embodiment of the present invention.
  • the weighting processing sub-module 52 includes:
  • the processing unit 62 is configured to: store the at least two primary synchronization time domain signals stored in advance according to the cell identifier ID A primary synchronous time domain signal is selected, and the power of one primary synchronous time domain signal and the initial phase of the one primary synchronous time domain signal are adjusted by multiplying the primary synchronous time domain signal by a complex number.
  • the present invention provides a method for transmitting an LTE primary synchronization signal, including: pre-storing three time series sequences of primary synchronization signals in advance; generating a physical time domain signal other than the primary synchronization signal according to the 3GPP LTE protocol; The cell ID selects one primary synchronization signal from the local three time domain primary synchronization signals to perform correlation power and phase weighting; and the time domain signal except the primary synchronization signal and the primary synchronization signal are in time After the fields are added, they are transmitted through the air interface.
  • the 3GPP LTE protocol includes 36.211 to 36.213, and the foregoing physical cell Can be expressed as
  • the above-mentioned weighting of the power and phase of the main synchronizing signal refers to the adjustment of the power of the synchronizing signal sequence and the adjustment of the initial phase of the sequence, and the implementation thereof is not limited to one, and can be realized by multiplying by a complex number.
  • FIG. 7 is a flowchart of LTE primary synchronization signal transmission according to an embodiment of the present invention. As shown in FIG. 7, the method includes the following steps:
  • Step S702 first storing three primary synchronization time domain signals locally, and the signal does not include a Cyclic Prefix (CP);
  • the frequency domain primary synchronization signal d u (n) is generated by the following formula:
  • u has three values, namely 25, 29 and 34.
  • the frequency domain primary synchronization signal resource mapping is implemented by the following formula:
  • N is the number of samples in an OFDM symbol, excluding the CP.
  • Step S704 generating a physical time domain signal other than the primary synchronization signal according to the 3GPP LTE protocol, and the time domain signal The number does not include the CP part.
  • Step S706 selecting a local time domain primary synchronization signal according to the cell ID, and performing related power and phase weighting.
  • the corresponding relationship of the local primary synchronization signal selected according to the cell ID is as follows, and is calculated according to the cell ID. according to The root sequence u is determined to determine the time series sequence of the primary synchronization signal, as shown in Table 1.
  • the above-mentioned weighting of the power and phase of the synchronization signal means that the weighting factor of the synchronization signal and the synchronization signal are multiplied by a complex number.
  • the weighting factor is represented by w, and w may be different between different transmitting antennas.
  • Step S708 the LTE time domain signal obtained in step S704 and the main synchronization time domain signal obtained in step S706 are added and transmitted through the air interface.
  • the time domain overlay is completed by adding the cyclic prefix CP to transmit the signal through the air interface.
  • N cp,l represents the length of the cyclic prefix of the OFDM symbol 1, and its value is specified in the LTE protocol 36.211.
  • the transmission of the synchronization signal in the LTE base station is realized, so that the terminal device can synchronize with the base station in the wireless channel, and meets the requirements of the system.
  • the frequency domain primary synchronization signal d u (n) is generated by the following formula:
  • u has three values, namely 25, 29 and 34.
  • the frequency domain primary synchronization signal resource mapping is implemented by the following formula:
  • N is the number of samples in an OFDM symbol, excluding the CP.
  • IFFT represents the inverse Fourier transform.
  • l represents an index of the OFDM symbol of the primary synchronization signal mapping specified in the 3GPP protocol, where N cp,l represents the length of the cyclic prefix of the OFDM symbol 1, the value of which is specified in the LTE protocol 36.211.
  • a physical time domain signal other than the primary synchronization signal is generated according to the 3GPP LTE protocol, and the time domain signal includes a CP portion.
  • the above-mentioned weighting of the power and phase of the synchronization signal refers to the weighting factor and synchronization of the synchronization signal.
  • the signal is multiplied by a complex number.
  • the LTE time domain signal obtained above and the main synchronization time domain signal are added and transmitted through the air interface.
  • the foregoing embodiments of the present invention can be applied to the field of communications, and solve the problem that the manner of signal transmission in the related art is relatively simple, so that the transmission mode is diversified.

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Abstract

本发明公开了一种发射方法及装置，其中，该方法包括：获取除主同步频域信号之外的频域信号对应的时域信号；从预先储存的至少两个主同步时域信号中确定一个主同步时域信号进行加权处理；将该时域信号和经过加权处理的该一个主同步时域信号相加后进行发射。通过本发明，解决了相关技术中信号发射的方式比较单一的问题，使得发射方式多样化。

Description

发射方法及装置 技术领域
本发明涉及通信领域，具体而言，涉及一种发射方法及装置。
背景技术
无线通信中系统侧和终端设备(user equipment，简称为UE)之间建立同步之前需进行同步信号检测，同步信号需有较强的自相关性和较低的互相关特性，这样才能保证终端设备能在低的SINR(Signal to Interference plus Noise Ratio)情况下接入基站。一般设计同步信号的时候都会设计一个主同步信号以及一个辅同步信号。主同步信号用于粗同步，辅同步信号用于精确确定帧同步的位置。目前基站发射信号时同步信号和其他非同步信号一起进行在线处理，同步信号比较单一。
针对相关技术中信号发射的方式比较单一的问题，目前尚未提出有效的解决方案。
发明内容
本发明实施例提供了一种发射方法及装置，以至少解决相关技术中信号发射的方式比较单一的问题。
根据本发明实施例的一个方面，提供了一种发射方法，包括：获取除主同步频域信号之外的频域信号对应的时域信号；从预先储存的至少两个主同步时域信号中确定一个主同步时域信号进行加权处理；将所述时域信号和经过加权处理的所述一个主同步时域信号相加后进行发射。
进一步地，获取除主同步频域信号之外的频域信号对应的时域信号包括：生成除主同步频域信号之外的频域信号，获取将生成的所述频域信号转换的时域信号。
进一步地，在从预先储存的至少两个主同步时域信号中确定一个主同步时域信号进行加权处理之前，还包括：将主同步频域信号转换为所述主同步时域信号；储存转换后的所述主同步时域信号。
进一步地，从预先储存的至少两个主同步时域信号中确定一个主同步时域信号进行加权处理包括：根据小区标识ID从预先储存的所述至少两个主同步时域信号中选择一个主同步时域信号进行功率和相位加权处理。
进一步地，根据小区标识ID从预先储存的所述至少两个主同步时域信号中选择一 个主同步时域信号进行功率和相位加权处理包括：根据小区标识ID从预先储存的所述至少两个主同步时域信号中选择一个主同步时域信号，通过所述一个主同步时域信号与一个复数相乘对所述一个主同步时域信号的功率以及所述一个主同步时域信号的初相进行调整。
根据本发明实施例的另一方面，提供了一种发射装置，包括：获取模块，设置为获取除主同步频域信号之外的频域信号对应的时域信号；加权处理模块，设置为从预先储存的至少两个主同步时域信号中确定一个主同步时域信号进行加权处理；发射模块，设置为将所述时域信号和经过加权处理的所述一个主同步时域信号相加后进行发射。
进一步地，所述获取模块包括：获取子模块，设置为生成除主同步频域信号之外的频域信号，获取将生成的所述频域信号转换的时域信号。
进一步地，所述装置还包括：转换模块，设置为将主同步频域信号转换为所述主同步时域信号；储存模块，设置为储存转换后的所述主同步时域信号。
进一步地，所述加权处理模块包括：加权处理子模块，设置为根据小区标识ID从预先储存的所述至少两个主同步时域信号中选择一个主同步时域信号进行功率和相位加权处理。
进一步地，所述加权处理子模块包括：处理单元，设置为根据小区标识ID从预先储存的所述至少两个主同步时域信号中选择一个主同步时域信号，通过所述一个主同步时域信号与一个复数相乘对所述一个主同步时域信号的功率以及所述一个主同步时域信号的初相进行调整。
通过本发明实施例，采用获取除主同步频域信号之外的频域信号对应的时域信号；从预先储存的至少两个主同步时域信号中确定一个主同步时域信号进行加权处理；将所述时域信号和经过加权处理的所述一个主同步时域信号相加后进行发射，解决了相关技术中信号发射的方式比较单一的问题，使得发射方式多样化。
附图说明
此处所说明的附图用来提供对本发明实施例的进一步理解，构成本申请的一部分，本发明的示意性实施例及其说明用于解释本发明，并不构成对本发明的不当限定。在附图中：
图1是根据本发明实施例的发射方法的流程图；
图2是根据本发明实施例的发射装置的框图；
图3是根据本发明优选实施例的发射装置的框图一；
图4是根据本发明优选实施例的发射装置的框图二；
图5是根据本发明优选实施例的发射装置的框图三；
图6是根据本发明优选实施例的发射装置的框图四；
图7是根据本发明实施例的LTE主同步信号发射的流程图。
具体实施方式
下文中将参考附图并结合实施例来详细说明本发明。需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互组合。
在本实施例中提供了一种发射方法，图1是根据本发明实施例的发射方法的流程图，如图1所示，该流程包括如下步骤：
步骤S102，获取除主同步频域信号之外的频域信号对应的时域信号；
步骤S104，从预先储存的至少两个主同步时域信号中确定一个主同步时域信号进行加权处理；
步骤S106，将该时域信号和经过加权处理的该一个主同步时域信号相加后进行发射。
通过上述步骤，获取除主同步频域信号之外的频域信号对应的时域信号；从预先储存的至少两个主同步时域信号中确定一个主同步时域信号进行加权处理；将该时域信号和经过加权处理的该一个主同步时域信号相加后进行发射，解决了相关技术中信号发射的方式比较单一的问题，使得发射方式多样化。
获取除主同步频域信号之外的频域信号对应的时域信号的方式有多种，在一个可选的实施例中，生成除主同步频域信号之外的频域信号，获取将生成的该频域信号转换的时域信号。
在从预先储存的至少两个主同步时域信号中确定一个主同步时域信号进行加权处理之前，将主同步频域信号转换为该主同步时域信号；储存转换后的该主同步时域信号，从而降低了基站侧的运算复杂度。
从预先储存的至少两个主同步时域信号中确定一个主同步时域信号进行加权处理的方式有多种，在一个可选的实施例中，根据小区标识ID从预先储存的至少两个主同步时域信号中选择一个主同步时域信号进行功率和相位加权处理。
对主同步时域信号进行功率和相位加权的方式有多种，在一个可选的实施例中，根据小区标识ID从预先储存的至少两个主同步时域信号中选择一个主同步时域信号，通过该一个主同步时域信号与一个复数相乘对该一个主同步时域信号的功率以及该一个主同步时域信号的初相进行调整。
本发明实施例还提供了一种发射装置，该装置用于实现上述实施例及优选实施方式，已经进行过说明的不再赘述。如以下所使用的，术语“模块”可以实现预定功能的软件和/或硬件的组合。尽管以下实施例所描述的装置较佳地以软件来实现，但是硬件，或者软件和硬件的组合的实现也是可能并被构想的。
图2是根据本发明实施例的发射装置的框图，如图2所示，包括：获取模块22、加权处理模块24和发射模块26，下面对各个模块进行简要说明。
获取模块22，设置为获取除主同步频域信号之外的频域信号对应的时域信号；
加权处理模块24，设置为从预先储存的至少两个主同步时域信号中确定一个主同步时域信号进行加权处理；
发射模块26，设置为将该时域信号和经过加权处理的该一个主同步时域信号相加后进行发射。
图3是根据本发明优选实施例的发射装置的框图一，如图3所示，该获取模块22包括：
获取子模块32，设置为生成除主同步频域信号之外的频域信号，获取将生成的该频域信号转换的时域信号。
图4是根据本发明优选实施例的发射装置的框图二，如图4所示，该装置还包括：
转换模块42，设置为将主同步频域信号转换为该主同步时域信号；
储存模块44，设置为储存转换后的该主同步时域信号。
图5是根据本发明优选实施例的发射装置的框图三，如图5所示，该加权处理模块24包括：
加权处理子模块52，设置为根据小区标识ID从预先储存的至少两个主同步时域信号中选择一个主同步时域信号进行功率和相位加权处理。
图6是根据本发明优选实施例的发射装置的框图四，如图6所示，该加权处理子模块52包括：
处理单元62，设置为根据小区标识ID从预先储存的该至少两个主同步时域信号 中选择一个主同步时域信号，通过该一个主同步时域信号与一个复数相乘对该一个主同步时域信号的功率以及该一个主同步时域信号的初相进行调整。
下面结合可选实施例对本发明实施例进行进一步说明。
本可选实施例提供一种LTE主同步信号的发射方法，包括：先离线在本地预先存储三个主同步信号时域序列；根据3GPP LTE协议生成除主同步信号以外的物理时域信号；根据小区ID从本地的三个时域主同步信号中选取一个主同步信号，进行相关的功率和相位加权；将所述的LTE除主同步信号以外的时域信号和所述的主同步信号在时域相加后通过空口发射出去。其中，3GPP LTE协议包括36.211～36.213，上述的物理小区
Figure PCTCN2015088514-appb-000001
可以表示成
Figure PCTCN2015088514-appb-000002
上述的对主同步信号进行的功率和相位的加权，是指对同步信号序列进行功率的调整以及对序列初相的调整，其实现的方式不只一种，可以通过乘以一个复数来实现。
实施例1
图7是根据本发明实施例的LTE主同步信号发射的流程图，如图7所示，包括以下步骤：
步骤S702，先在本地存储三个主同步时域信号，信号不包括循环前缀(Cyclic Prefix，简称为CP)；
通过以下公式生成频域主同步信号du(n)：
Figure PCTCN2015088514-appb-000003
其中，u的取值为三个，即25，29和34。
频域主同步信号资源映射通过以下公式实现：
Figure PCTCN2015088514-appb-000004
N是一个OFDM符号内的采样点数，不包括CP。
将频域主同步信号转换到时域且存储：
tu(m)＝IFFT(au,k),k＝0,...N-1,m＝0,...N-1
其中，IFFT表示的傅里叶逆变换。
步骤S704，根据3GPP LTE协议生成除主同步信号以外的物理时域信号，时域信 号不包括CP部分。
步骤S706，根据小区ID选择本地的时域主同步信号，进行相关的功率和相位加权。
所述的根据小区ID选择本地主同步信号对应关系如下，根据小区ID计算出
Figure PCTCN2015088514-appb-000005
Figure PCTCN2015088514-appb-000006
根据
Figure PCTCN2015088514-appb-000007
确定根序列u，即可确定主同步信号时域序列，如表1所示。
表1
Figure PCTCN2015088514-appb-000008
上述的对同步信号进行的功率和相位的加权，是指将同步信号的加权因子和同步信号进行复数相乘。用w表示加权因子，不同发射天线之间w可以不相同。在一个可选的实施例中，可以通过以下公式进行加权处理：tu(m)＝tu(m)·w。
步骤S708，将步骤S704得到的LTE时域信号和步骤S706得到的主同步时域信号相加后通过空口发射出去。
设步骤S704得到的除主同步信号以外的LTE时域信号为s(m)，则步骤S708所述的时域信号叠加可以用下面公式表述。s'(l,m)＝s(l,m)+tu(m),m＝0,1...N-1。其中l表示3GPP协议中规定的主同步信号映射的OFDM符号的索引。.
时域叠加完成需要增加循环前缀CP，才能将信号通过空口发射出去。
Figure PCTCN2015088514-appb-000009
其中Ncp,l表示OFDM符号l的循环前缀的长度，其取值在LTE协议36.211中规定。
通过上述步骤，实现了LTE基站中同步信号的发射，使得终端设备能在无线信道中和基站同步上，满足了系统的要求。
实施例2
先在本地存储三个主同步时域信号，包含循环前缀，包括：
通过以下公式生成频域主同步信号du(n)：
Figure PCTCN2015088514-appb-000010
其中，u的取值为三个，即25，29和34。
通过以下公式实现频域主同步信号资源映射：
Figure PCTCN2015088514-appb-000011
N是一个OFDM符号内的采样点数，不包括CP。
将频域主同步信号转换到时域且存储：
Figure PCTCN2015088514-appb-000012
其中，IFFT表示傅里叶逆变换。
对时域信号添加CP循环前缀：
Figure PCTCN2015088514-appb-000013
其中l表示3GPP协议中规定的主同步信号映射的OFDM符号的索引，其中Ncp,l表示OFDM符号l的循环前缀的长度，其取值在LTE协议36.211中规定。
根据3GPP LTE协议生成除主同步信号以外的物理时域信号，时域信号包括CP部分。
根据小区ID选择本地的时域主同步信号，进行相关的功率和相位加权；所述的根据小区ID选择本地主同步信号对应关系如下，根据小区ID计算出
Figure PCTCN2015088514-appb-000014
Figure PCTCN2015088514-appb-000015
根据
Figure PCTCN2015088514-appb-000016
确定根序列u，即可确定主同步信号时域序列如小3所示。
表3
Figure PCTCN2015088514-appb-000017
上述的对同步信号进行的功率和相位的加权，是指将同步信号的加权因子和同步 信号进行复数相乘。
将上述得到的LTE时域信号和主同步时域信号相加后通过空口发射出去。
设上述得到的除主同步信号以外的LTE时域信号为s(m)，则上述的时域信号叠加可以用下面公式表述。s'(l,m)＝s(l,m)+tu,cp(m),m＝0,1...N+Ncp,l-1其中l表示3GPP协议中规定的主同步信号映射的OFDM符号的索引。时域相加后才能将信号通过空口发射出去。
显然，本领域的技术人员应该明白，上述的本发明的各模块或各步骤可以用通用的计算装置来实现，它们可以集中在单个的计算装置上，或者分布在至少两个计算装置所组成的网络上，可选地，它们可以用计算装置可执行的程序代码来实现，从而，可以将它们存储在存储装置中由计算装置来执行，并且在某些情况下，可以以不同于此处的顺序执行所示出或描述的步骤，或者将它们分别制作成各个集成电路模块，或者将它们中的至少两个模块或步骤制作成单个集成电路模块来实现。这样，本发明不限制于任何特定的硬件和软件结合。
以上所述仅为本发明的优选实施例而已，并不用于限制本发明，对于本领域的技术人员来说，本发明可以有各种更改和变化。凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。
工业实用性
上述的本发明实施例，可以应用于通信领域，解决了相关技术中信号发射的方式比较单一的问题，使得发射方式多样化。

Claims (10)

  1. 一种发射方法，包括：
    获取除主同步频域信号之外的频域信号对应的时域信号；
    从预先储存的至少两个主同步时域信号中确定一个主同步时域信号进行加权处理；
    将所述时域信号和经过加权处理的所述一个主同步时域信号相加后进行发射。
  2. 根据权利要求1所述的方法，其中，获取除主同步频域信号之外的频域信号对应的时域信号包括：
    生成除主同步频域信号之外的频域信号，获取将生成的所述频域信号转换的时域信号。
  3. 根据权利要求1所述的方法，其中，在从预先储存的至少两个主同步时域信号中确定一个主同步时域信号进行加权处理之前，还包括：
    将主同步频域信号转换为所述主同步时域信号；
    储存转换后的所述主同步时域信号。
  4. 根据权利要求1所述的方法，其中，从预先储存的至少两个主同步时域信号中确定一个主同步时域信号进行加权处理包括：
    根据小区标识ID从预先储存的所述至少两个主同步时域信号中选择一个主同步时域信号进行功率和相位加权处理。
  5. 根据权利要求4所述的方法，其中，根据小区标识ID从预先储存的所述至少两个主同步时域信号中选择一个主同步时域信号进行功率和相位加权处理包括：
    根据小区标识ID从预先储存的所述至少两个主同步时域信号中选择一个主同步时域信号，通过所述一个主同步时域信号与一个复数相乘对所述一个主同步时域信号的功率以及所述一个主同步时域信号的初相进行调整。
  6. 一种发射装置，包括：
    获取模块，设置为获取除主同步频域信号之外的频域信号对应的时域信号；
    加权处理模块，设置为从预先储存的至少两个主同步时域信号中确定一个主同步时域信号进行加权处理；
    发射模块，设置为将所述时域信号和经过加权处理的所述一个主同步时域信 号相加后进行发射。
  7. 根据权利要求6所述的装置，其中，所述获取模块包括：
    获取子模块，设置为生成除主同步频域信号之外的频域信号，获取将生成的所述频域信号转换的时域信号。
  8. 根据权利要求6所述的装置，其中，所述装置还包括：
    转换模块，设置为将主同步频域信号转换为所述主同步时域信号；
    储存模块，设置为储存转换后的所述主同步时域信号。
  9. 根据权利要求6所述的装置，其中，所述加权处理模块包括：
    加权处理子模块，设置为根据小区标识ID从预先储存的所述至少两个主同步时域信号中选择一个主同步时域信号进行功率和相位加权处理。
  10. 根据权利要求9所述的装置，其中，所述加权处理子模块包括：
    处理单元，设置为根据小区标识ID从预先储存的所述至少两个主同步时域信号中选择一个主同步时域信号，通过所述一个主同步时域信号与一个复数相乘对所述一个主同步时域信号的功率以及所述一个主同步时域信号的初相进行调整。
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