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Synchronization signal sending method, synchronization signal detection method, base station and terminals

A technology of synchronization signal and transmission method, applied in the fields of base station and terminal, synchronization, synchronization signal transmission and detection method, can solve the problems of increasing the power consumption and synchronization time of the receiving end, the limited energy of synchronization signal, and reducing the efficiency of narrowband system.

Active Publication Date: 2017-05-10
ZTE CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method requires that the synchronization signal can only be sent in one OFDM symbol within the slot
For the aforementioned NB-LTE system, its bandwidth can be only 180kHz. If the synchronization signal can only be sent in one OFDM symbol in the time slot, the energy of the synchronization signal received by the receiving end will be very limited, and the receiving end often needs Synchronization with the system can only be achieved by accumulatively receiving synchronization signals of many time slots. Compared with the existing LTE system, this will significantly increase the power consumption and synchronization time of the receiving end, and also reduce the efficiency of the aforementioned narrowband system

Method used

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  • Synchronization signal sending method, synchronization signal detection method, base station and terminals
  • Synchronization signal sending method, synchronization signal detection method, base station and terminals
  • Synchronization signal sending method, synchronization signal detection method, base station and terminals

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Embodiment 1

[0121] Such as figure 1 As shown, this embodiment provides a synchronization signal transmission method, the method comprising:

[0122] Step S110: sending a synchronization signal or a part of the synchronization signal on consecutive M transmission symbols;

[0123] Wherein, the M is an integer not less than 2;

[0124] The transmission symbol includes a cyclic prefix and a useful symbol part; the content carried in the cyclic prefix is ​​the last part of content carried by the useful symbol.

[0125] The synchronization signal sending method described in this embodiment can be applied to a base station. The method described in this embodiment is especially applicable to narrowband transmission. In this embodiment, the synchronization signal or a part of the synchronization signal is sent in M ​​transmission symbols. In this way, the receiving end can receive synchronization signals from at least M transmission symbols, which can improve the receiving gain, thereby impro...

Embodiment 2

[0155] Such as figure 2 As shown, this embodiment provides a synchronization signal detection method, the method includes:

[0156] Step S210: Receive the synchronization signal or a part of the synchronization signal sent by the transmitting end in consecutive M transmission symbols; wherein, the M is an integer not less than 2; the transmission symbol includes a cyclic prefix and a useful symbol part; The content carried in the cyclic prefix is ​​the last part of the content carried by the useful symbol;

[0157] Step S220: Detect the synchronization signal by using sample sequence correlation.

[0158] The method for detecting a synchronization signal described in this embodiment is applied to a receiving end, and is usually applied to a terminal such as a mobile phone. In this embodiment, the receiving end in step S210 will continuously receive M transmission symbols at one time. And from the received M transmission symbols, the synchronization signal is detected throu...

example 1

[0182] Figure 3A with Figure 3B A schematic diagram of sending a synchronization signal on consecutive M=3 transmission symbols is given in , and the contents of the three transmission symbols are the same; the content of the cyclic prefix and the useful symbol part of the three transmission symbols are respectively consistent. Figure 3A The cyclic prefix length of the transmitted symbols shown in Figure 3B The transmission symbols shown are prefixed differently. Assume that at a specific sampling frequency, the useful symbol part of all transmission symbols in transmission mode 1 includes N=7 samples (a, b, c, d, e, f, g), and the cyclic prefix part includes L=2 samples point, both are (f,g). In transmission mode 2, the useful symbol part of all transmission symbols includes N=7 samples (a, b, c, d, e, f, g), and the cyclic prefix part includes L=3 samples, both of which are (e , f, g).

[0183] For the above synchronization signal transmission, the synchronization s...

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Abstract

The invention discloses a synchronization signal sending method, a synchronization signal detection method, a base station and terminals. The synchronization signal sending method comprises steps that a synchronization signal or a part of the synchronization signal is sent with continuous M transmission symbols; the M is an integer not smaller than 2; the transmission symbol comprises a cyclic prefix and a useful symbol portion; content contained by the cyclic prefix is the last part of content contained by the useful symbol portion.

Description

technical field [0001] The invention relates to a synchronization technology in the field of wireless communication, in particular to a method for sending and detecting a synchronization signal, a base station and a terminal. Background technique [0002] In an Orthogonal Frequency-Division Multiplexing (OFDM) system, each OFDM symbol includes two parts: a cyclic prefix (Cyclic Prefix, CP) and a useful symbol part. The cyclic prefix section is usually a repetition of a piece of data following the useful symbol section. In order to be applied to different channel environments, the cyclic prefix length of a communication system based on OFDM technology usually has multiple options. [0003] For example, in the Long Term Evolution (LTE) system using OFDM technology, two types of cyclic prefixes are supported: for the application scenarios of ultra-long coverage or multicast and broadcast information transmission, the system will use symbols with long cyclic prefixes . At thi...

Claims

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Application Information

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IPC IPC(8): H04W56/00H04W72/04H04L27/26
CPCH04L27/2601H04W56/0085H04W72/0446H04L27/2613H04L5/0048H04W56/0015H04L27/2607H04L27/2656
Inventor 韩祥辉夏树强张雯戴博戴谦石靖
Owner ZTE CORP
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