Timing synchronous receiving method and device thereof

A technology of timing synchronization and receiving method, applied in the field of communication, can solve the problems of occupying a lot of storage space and a large amount of calculation, and achieve the effect of small calculation amount, simple calculation, and reduced calculation amount.

Active Publication Date: 2009-09-16
DATANG MICROELECTRONICS TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to propose a timing synchronization receiving method and its device, which are applied to the timing synchronization of

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  • Timing synchronous receiving method and device thereof
  • Timing synchronous receiving method and device thereof
  • Timing synchronous receiving method and device thereof

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[0052] After careful observation, the inventor noticed that in the multipath channel, the arrival of each path will change the delay autocorrelation value of the input signal. When the last path arrives, the autocorrelation value will reach the maximum and form A platform does not change anymore. Therefore, a timing synchronization receiving method and device according to an embodiment of the present invention are proposed to realize the timing synchronization receiving of the PN sequence-based OFDM system. The basic idea is to determine the normalization of the input signal. Whether the modified delay autocorrelation value reaches the peak, and whether it forms a platform to determine whether the last path has arrived.

[0053] The present invention will be described in detail below with reference to the drawings.

[0054] reference figure 1 This figure shows a timing synchronization receiving method according to an embodiment of the present invention, which specifically include...

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Abstract

The invention discloses a timing synchronous receiving method, comprising the steps of sustainedly receiving and buffering an input signal, making a delay self-correlation operation which delays the time of one PN sequence on the received input signal, carrying out the sliding calculation of correlation value and energy value in a preset correlation time, making a normalization operation on the correlation value and the energy value to obtain the normalized correlation value; determining whether the obtained normalized correlation value meets the condition of being greater than a correlation peak threshold or not, and determining whether the difference between the obtained normalized correlation value and the normalized correlation value which is relatively obtained before a period of time meets the condition of being less than a correlation peak slope threshold, if so, the conversion treatment from time domain to frequency domain is carried out on the input signal. The invention further discloses a timing synchronous receiving device which can greatly reduce the operation quantity for timing synchronous receiving and save the storage space.

Description

Technical field [0001] The present invention relates to the field of communications, and in particular to a method and device for timing synchronization receiving of an OFDM (Orthogonal Frequency Division Multiplexing) system based on a PN (Pseudorandom Noise) sequence. Background technique [0002] At present, OFDM technology has been successfully applied in communication devices and has been selected as the core modulation and demodulation technology for next-generation mobile communications. However, because the OFDM system is sensitive to timing deviations, if there are errors in slot synchronization and symbol synchronization, it will have a great impact on the performance of the entire device. Therefore, various synchronization algorithms need to be used to accurately obtain synchronization information to eliminate synchronization errors. [0003] In many OFDM systems, the timing synchronization algorithm requires coarse synchronization and fine synchronization. Specificall...

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Application Information

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IPC IPC(8): H04L27/26
Inventor 潘磊李峰郑继荣
Owner DATANG MICROELECTRONICS TECH CO LTD
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