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Coarse timing capture method, apparatus and mobile terminal

A mobile terminal and roughly defined technology, applied in digital transmission systems, electrical components, modulated carrier systems, etc., can solve problems such as inability to obtain better synchronization performance, failure, and different frame structures, and achieve effective and reliable algorithms

Active Publication Date: 2011-07-20
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For different communication standards, such as LTE, WiMAX, and DVB, due to their different frame structures, there are large differences in timing acquisition methods
[0003] In practical applications, due to the complexity of the wireless communication environment and the differences in various parameters in different systems, simply using traditional OFDM timing synchronization and frequency synchronization methods to obtain frame boundary and carrier frequency information cannot obtain better synchronization performance, and even complete failure

Method used

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  • Coarse timing capture method, apparatus and mobile terminal
  • Coarse timing capture method, apparatus and mobile terminal
  • Coarse timing capture method, apparatus and mobile terminal

Examples

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Embodiment Construction

[0021] In order to make the object, technical solution and advantages of the present invention more clearly, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0022] Such as figure 1 As shown, it is a coarse timing acquisition method according to an embodiment of the present invention, which may include:

[0023] S101. Receive at least N samples continuously.

[0024] Where N is the sum of the number of samples corresponding to the sum of the receiving and transmitting guard interval RTG (for example, the RTG of the BS in the Worldwide Interconnection for Microwave Access Time Division Duplex WiMAXTDD) system and the time of 5 milliseconds and the number of delayed samples. For example, N can be:

[0025] N=T frame_5ms / (T b / N fft )+RTG / (T b / N fft )+N delay

[0026] Among them, T b Represents the duration of an OFDMA (Orthogonal Frequency Division Multiple Access) symbol, in s, ...

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Abstract

The example of the invention discloses a coarse timing capturing method, which comprises searching valley value for the normalization cross-power after obtaining normalization cross-power according to sampling point which is received and a delayed sample, assuring the valley value which is searched to be coarse timing capturing sampling points, thereby using on initial time synchronization, and algorithm is effective and reliable. And meanwhile, the example of the invention also discloses a coarse timing capturing device and a moving terminal.

Description

technical field [0001] The invention relates to the field of mobile communication, in particular to a rough timing capture technology. Background technique [0002] In recent years, the multi-carrier modulation technology represented by Orthogonal Frequency Division Multiplexing (OFDM) has attracted more and more attention, and has been widely used in various wireless communication systems. For different communication standards, such as LTE, WiMAX, and DVB, due to their different frame structures, there are large differences in timing acquisition methods. [0003] In practical applications, due to the complexity of the wireless communication environment and the differences in various parameters in different systems, simply using traditional OFDM timing synchronization and frequency synchronization methods to obtain frame boundary and carrier frequency information cannot obtain better synchronization performance, and even There will be a complete failure. [0004] Therefore...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26
CPCH04L27/2656H04L27/2662
Inventor 邢丽娜胡宏杰
Owner HUAWEI TECH CO LTD