Method for sending synchronous signal sequence

Abstract

The invention discloses a method for sending a synchronous signal sequence. The method comprises the following steps: for each ordinary frequency point in a synchronous frame, generating a primary synchronous signal sequence and a secondary synchronous signal sequence occupying the ordinary frequency point according to an absolute frequency point index number and a cell identifier of the ordinary frequency point; mapping the primary synchronous signal sequence onto a primary synchronous time-frequency resource corresponding to the ordinary frequency point in the synchronous frame; mapping the secondary synchronous signal sequence onto a secondary synchronous time-frequency resource corresponding to the ordinary frequency point in the synchronous frame; and for each ordinary frequency point, generating a time domain continuous signal of the ordinary frequency point transmitted by corresponding OFDM symbols in the synchronous frame on a single antenna port by means of sequence symbols mapped onto the synchronous time-frequency resources, and carrying out corresponding transmission. The method disclosed by the invention can be used for effectively avoiding the problem of a high peak-to-average ratio due to superposition of synchronous signals, and is suitable for private network wireless communication systems with carrier aggregation characteristics.

Description

technical field [0001] The invention relates to mobile communication technology, in particular to a method for sending a synchronous signal sequence. Background technique [0002] The synchronization of the TD-LTE system adopts two specially designed physical signals, which are broadcast in each cell, and they are respectively the Primary Synchronization Signal (PSS) and the Secondary Synchronization Signal (SSS). The detection of these two signals not only synchronizes the time and frequency, but also provides the UE physical layer cell identity and cyclic prefix length, and informs the UE whether the cell is using Frequency Division Duplex (FDD) or Time Division Duplex (TDD). [0003] In a TDD cell, regardless of the system bandwidth, the time domain and frequency domain positions of the PSS and SSS are fixed, and the PSS is located in the middle 72 subcarriers of the third Orthogonal Frequency Division Multiplexing (OFDM) symbol of time slot 2 and time slot 12. , the SSS...

AI Technical Summary

Problems solved by technology

If each frequency point of this type of private network wireless communication system adopts the TD-LTE synchronization signal generation method, then before IFFT conversion, multiple frequency points will generate the same frequency domain signal (f 1 ,f 2 ... f N ), then after IFFT, filter filtering, and modulation to their respective carrier frequencies, when signals of multiple carrier frequencies are superimposed, if the phases of multiple signals are consistent, the instantaneous power of the superimposed signal obtained will be much higher than The average power of the signal, which can cause high peak-to-average ratio (PAPR) problems

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