SC-FDE system synchronization method and system under high multipath time delay

A SC-FDE and multi-path delay technology, applied in the field of communication, can solve the problems of low transmission efficiency, high computational complexity, and poor synchronization performance, and achieve good synchronization performance, high transmission efficiency, and low computational complexity.

Active Publication Date: 2021-04-09
上海微波技术研究所(中国电子科技集团公司第五十研究所)
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Problems solved by technology

[0005] The synchronization algorithms in existing documents 1 and 2 are only designed for OFDM systems. The traditional SC-FDE system synchronization algorithms in the prior art have poor synchronization performance, high computational complexity, long training sequence period length, and low transmission efficiency.

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  • SC-FDE system synchronization method and system under high multipath time delay
  • SC-FDE system synchronization method and system under high multipath time delay
  • SC-FDE system synchronization method and system under high multipath time delay

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Embodiment Construction

[0072] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0073] Such as Figure 1 to Figure 8 As shown, the present invention provides an SC-FDE system synchronization method and a synchronization system. The synchronization method includes: the sending end sends a part including the first training sequence A, the second training sequence B, the cyclic prefix CP and the data symbol DATA. figure 1 It is a schematic diagram of the frame structure adopted in the SC-FDE system synchronization method of the present invention. Such as figure 1 As shown, in the p...

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Abstract

The invention provides an SC-FDE system synchronization method and system under high multipath time delay. The method comprises the following steps: a frame capturing step: carrying out the detection of a data frame through employing a first training sequence A and an autocorrelation time delay algorithm, carrying out the frame capturing, and determining the data range of the frame; a fine synchronization step: performing cross-correlation function operation by using the first training sequence A, the local training sequence A and the received training sequence A in the determined data range of the frame, and performing timing synchronization; and a correction step of performing frequency offset correction and channel equalization by using the second training sequence B. The synchronization system provided by the invention specially for the SC-FDE system is short in calculation time and low in complexity; The method is high in synchronization precision in a multipath environment, and is better in robustness.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a SC-FDE system synchronization method and system under high multipath time delay. Background technique [0002] In recent years, SC-FDE system has attracted extensive attention for its excellent performance against frequency selective fading channels. The system has the same low computational complexity as the OFDM system, but it does not have an excessively high peak-to-average power ratio, and is less sensitive to frequency deviation and phase deviation. [0003] For the SC-FDE system, it is very important to determine the initial position of the FFT / IFFT window to perform equalization in the frequency domain. Therefore, an accurate timing synchronization algorithm is crucial to the performance of the SC-FDE system. [0004] The patent document CN101547174A provides a symbol synchronization method for the SC-FDE system. The method is to insert a synchronizatio...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26H04L25/03
CPCH04L27/2656H04L25/03159Y02D30/70
Inventor 王紫涵贾斌张锐陈海军
Owner 上海微波技术研究所(中国电子科技集团公司第五十研究所)
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