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Timing tracking apparatus, receiver, timing tracking and regulating method

A timing tracking and timing error technology, applied in the direction of synchronization devices, digital transmission systems, electrical components, etc., can solve the problems of large phase jitter, slow adjustment speed, etc., achieve small phase jitter, fast speed, and avoid system communication quality degradation Effect

Inactive Publication Date: 2008-11-26
ST ERICSSON SEMICON BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this commonly used synchronous tracking method is that the adjustment speed and phase jitter are a pair of contradictory quantities
If the adjustment speed is required to be fast, there will be a relatively large phase jitter; if a small phase jitter is required, the corresponding adjustment speed will also be slow

Method used

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  • Timing tracking apparatus, receiver, timing tracking and regulating method
  • Timing tracking apparatus, receiver, timing tracking and regulating method
  • Timing tracking apparatus, receiver, timing tracking and regulating method

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Embodiment Construction

[0022] Such as figure 2 As shown, the receiving device according to the present invention includes a radio frequency front end 21, an automatic gain controller 22, an analog-to-digital converter 23, a raw cosine filter 24, a receiver 26 and timing tracking means 25. The structures and functions of the radio frequency front end 21, the automatic gain controller 22, the analog-to-digital converter 23, the root cosine filter 24 and the receiver 26 are the same as those of the prior art, and their structures will not be described in detail here. The timing tracking device 25 receives two channels of data of the late sampling point and the early sampling point from the root-derived cosine filter 24, and estimates the timing error according to the received data. Here, the late and early sampling points are for ideal sampling points. The timing error obtained by the timing tracking device 25 is input to the analog-to-digital converter 23 to adjust the timing. The estimation of the...

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Abstract

This invention provides a timed tracker, a receiving device and timed tracking and regulating method. Said tracker utilizes data of early sampling point and late sampling point to compute the timed error. Said tracker includes a data separator for separating the data of early and late sampling points of the learn series from the received data, a computer, an average device and a timed error computer for computing timed errors based on the average value output by the average device.

Description

technical field [0001] The present invention relates to a timing tracking device in a wireless communication system, a receiving device, and a timing tracking and adjustment method, in particular to a timing tracking device and a receiving device in a Time Division Synchronous Code Division Multiple Access (TD-SCDMA) mobile terminal, Timing tracking and adjustment methods. Background technique [0002] In the digital mobile communication system, in order to correctly receive the information sent by the base station (BS), the mobile terminal (UE) must use the correct clock information to periodically sample the received signal and analyze the data frame, that is, to realize the locally generated PN code and receive The PN code in the received signal is synchronized, that is, the downlink synchronization with the base station needs to be realized. The downlink synchronization of the mobile terminal is divided into two stages: synchronization establishment and synchronization ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L7/033
Inventor 牟秀红
Owner ST ERICSSON SEMICON BEIJING
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