Method and system for implementing multiple timing domains for primary and secondary synchronization detection in EUTRA/LTE

摘要

A mobile device receives a signal, from a base station, comprising a primary synchronization sequence (PSS) and a secondary synchronization sequence (SSS). The mobile device utilizes two different sampling rates to perform the PSS synchronization and the SSS detection individually. For example, the mobile device synchronizes to the received PSS at a first sampling rate such as 0.96 MHz, which is determined based on the PSS transmission rate and/or the length of the received PSS. The mobile device detects the received SSS at a second sampling rate such as 1.92 MHz, which equals to the sampling rate for an analog-to-digital conversion at the mobile device. The received PSS and associated symbol timing are detected through the PSS synchronization to support the SSS detection. The detected SSS is used to acquire cell-specific parameters such as cell ID. The acquired cell-specific parameters ensure proper communications between the mobile device and the base station.

主权项

1. A method, comprising:
receiving a primary synchronization signal (PSS) and a secondary synchronization signal (SSS); sampling the PSS at a first sampling rate; downsampling the sampled PSS by a decimation factor to reduce a sampling rate of the sampled PSS from the first sampling rate to a second sampling rate; correlating the downsampled PSS with each of a plurality of correlation reference sequences at the second sampling rate to provide a plurality of correlation values; accumulating the plurality of correlation values to determine a plurality of peak correlation magnitudes; determining a maximum peak correlation magnitude from among the plurality of peak correlation magnitudes; determining symbol timing based on a position of the maximum peak correlation magnitude; and performing SSS detection at the first sampling rate utilizing the symbol timing.