Primary synchronization signal generation method and device and computer readable storage medium

Abstract

The invention discloses a primary synchronization signal generation method and device, and a computer readable storage medium. The method comprises the steps: acquiring ZC sequences corresponding to three root indexes, wherein the three ZC sequences have the same length; carrying out the discrete Fourier transform on the three ZC sequences to obtain frequency domain sequences in one-to-one correspondence with the three ZC sequences; respectively expanding the three frequency domain sequences to obtain expanded sequences in one-to-one correspondence with the frequency domain sequences; carryingout the inverse discrete Fourier transform on the three extended sequences to obtain time domain sequences in one-to-one correspondence with the extended sequences; and combining the three time domain sequences to obtain a main synchronization signal. The main synchronization signal generated by the scheme can balance the autocorrelation performance and the frequency offset resisting performance,and the time-frequency synchronization between the user terminal and the base station can be realized quickly.

Description

technical field [0001] The present invention relates to the field of wireless communication, in particular to a method and device for generating a master synchronization signal, and a computer-readable storage medium. Background technique [0002] Since the ZC sequence (Zadoff-Chu sequence) has good autocorrelation properties, a single ZC sequence is usually used when designing the main synchronization signal sequence. In narrowband low signal-to-noise ratio communication systems, such as IoT systems, it is usually necessary to design a longer master synchronization signal sequence. Since there may be a frequency offset between the transmitting end of the base station (eNB) and the receiving end of the user terminal, a single ZC sequence will cause the phase rotation of the received signal in the time domain, resulting in a sharp deterioration of the autocorrelation characteristics. For example, when the user terminal uses the local sequence for correlation detection, if th...

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Problems solved by technology

However, too many ZC sequences lead to poor autocorrelation performance of the generated master sync signal sequence

[0005] The existing schemes for generating the main synchronization signal sequence are difficult to balance the autocorrelation performance and the performance against frequency offset, and cannot resist the influence of frequency offset, so that the user terminal cannot quickly achieve time-frequency synchronization with the base station

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