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Synchronization method and apparatus for digital audio broadcast receiver

A digital audio broadcasting and receiver technology, applied in broadcasting devices, broadcasting system reception, multi-frequency code systems, etc., can solve the problems of accuracy influence, influence on mobile phone reception effect, etc., and achieve the effect of improving reception effect

Inactive Publication Date: 2008-12-24
安凡微电子(上海)有限公司
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Problems solved by technology

However, for a mobile terminal such as a mobile phone, since it is not a fixed receiver, the strength of the signal will change with the movement of the mobile phone. ), the accuracy of FFO, IFO and TO estimation will be seriously affected, which in turn will affect the reception effect of the mobile phone

Method used

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  • Synchronization method and apparatus for digital audio broadcast receiver
  • Synchronization method and apparatus for digital audio broadcast receiver
  • Synchronization method and apparatus for digital audio broadcast receiver

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no. 1 example

[0045] In this embodiment, the synchronization method for the DAB receiver performs FFO estimation, FFO correction, IFO estimation and TO estimation on the received data in the acquisition phase, performs frequency offset correction according to FFO estimation and IFO estimation, and performs frequency offset correction according to TO estimation. Time offset correction, thereby completing accurate frequency offset and time offset estimation and compensation; in the tracking phase, FFO estimation and TO estimation are performed on the received data, frequency offset correction is performed according to FFO estimation, and TO estimation is carried out Time offset correction, so as to estimate and compensate frequency offset and time offset in real time. Wherein, the TO estimation is estimated according to the signal-to-noise ratio, that is, the TO estimation is adaptive according to the strength of the signal strength.

[0046] The DAB receiver is used to receive a data transmi...

no. 2 example

[0094] The difference between this embodiment and the synchronization method described in the first embodiment is that the synchronization method in the first embodiment is divided into an acquisition phase and a tracking phase. Perform FFO estimation, FFO correction, IFO estimation and TO estimation on the data, perform frequency offset correction based on FFO estimation and IFO estimation, and perform time offset correction based on TO estimation, thereby completing accurate frequency offset and time offset estimation and Compensation; the tracking stage is to perform FFO estimation and TO estimation on the received data when receiving each data transmission frame after the first data transmission frame, perform frequency offset correction according to FFO estimation, and perform time offset correction according to TO estimation, In this way, frequency offset and time offset are estimated and compensated in real time. Wherein, the TO estimation is estimated according to the ...

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Abstract

The invention relates to a synchronous method used for a digital audio broadcasting receiver. The method comprises the following steps: fractional frequency offset estimation, fractional frequency offset correction, integer frequency offset estimation and timing offset estimation are performed to data received at the acquisition phase, frequency offset correction is performed according to the fractional frequency offset estimation and the integer frequency offset estimation, and time offset correction is performed according to the timing offset estimation; the fractional frequency offset estimation and the timing offset estimation are performed to data received at the tracking phase, frequency offset correction is performed according to the fractional frequency offset estimation, time offset correction is performed according to the timing offset estimation, and the timing offset estimation is selfadaptive according to the signal-to-noise ratio. The method is applied to the digital audio broadcasting receiver of a mobile terminal, when the signal is weaker, the program is received at the mobile terminal for a long term, or the acceleration motion and the deceleration motion are performed at the mobile terminal suddenly at high speed, high quality audio broadcasting signals can be demodulated, and further the satisfying reception effect can be obtained.

Description

technical field [0001] The invention relates to mobile communication technology, in particular to a synchronization method and device for a digital audio broadcasting receiver. Background technique [0002] Mobile communication is the most dynamic and promising communication method in the field of communication, and is the most personalized wireless communication means in today's information society. With the development of mobile communication technology, the functions of mobile communication terminals represented by mobile phones are increasing day by day. In June 2006, China formally implemented the National Standard for Digital Audio Broadcast (DAB, Digital Audio Broadcast) (GY / T214.2006), and has launched DAB / Digital Multimedia Broadcasting (DAB / T-DMB) programs, mobile phones can already receive audio and video programs that meet the Chinese DAB mobile TV standard. [0003] However, at present, the existing domestic mobile phones cannot meet the requirements of the D...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26H04B1/707H04B1/16H04H40/27
Inventor 熊学泉王吉健陈正一赵小勇李新兵张平山
Owner 安凡微电子(上海)有限公司
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