Fixed time acquiring method under continuous system multipath channel

A timing acquisition, continuous system technology, applied in transmission systems, multi-carrier systems, digital transmission systems, etc., can solve the problems of unstable acquisition performance, less obvious LOS path, etc., to improve robustness, high acquisition probability, The effect of low false alarm probability

Inactive Publication Date: 2013-08-07
TSINGHUA UNIV
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Problems solved by technology

[0006] The traditional timing acquisition method works better when the auxiliary sequence is long, the channel is a single-path channel or a multi-path channel with obvious LOS paths, but this method has defects: firstly, when the LOS path is not obvious, that is, the multipath component When the diameter energy is

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  • Fixed time acquiring method under continuous system multipath channel
  • Fixed time acquiring method under continuous system multipath channel
  • Fixed time acquiring method under continuous system multipath channel

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Embodiment Construction

[0029] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0030] In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Orientation or position indicated by "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. The relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the descrip...

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Abstract

The invention provides a fixed time acquiring method under a continuous system multipath channel. The method comprises steps of acquiring a main peak through maximum likelihood searching; and acquiring a first arrival diameter through generalized likelihood ratio and peak detection. According to the fixed time acquiring method under the continuous system multipath channel, the maximum likelihood searching and the generalized likelihood ratio and peak detection are adopted at the same time to avoid using an absolute threshold, so that the robustness of a search algorithm is obviously improved, and the system can work in occasions with larger signal to noise ratio dynamic range.

Description

technical field [0001] The invention belongs to the technical field of mobile communication, and in particular relates to a timing acquisition method under a continuous system multipath channel. Background technique [0002] Timing acquisition is one of the most critical technologies in communication systems, also known as coarse synchronization. The purpose of timing acquisition is to roughly estimate the phase of the received data block, and obtain basic timing information, such as the starting moment of the data block, to realize subsequent estimation of related parameters and demodulation and decoding. Therefore, timing capture is the basis for the normal operation of the entire communication system. [0003] The entire uncertain phase region of timing capture is composed of several in-phase phases (H 1 ) and out-of-phase phase (H 0 )composition. h 1 The phase indicates the phase of the local sequence within 1 chip of the phase difference from the receiving timing a...

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Application Information

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IPC IPC(8): H04L27/38H04L7/00
Inventor 肖振宇张昌明金德鹏李长兴李萍郁光辉袁志锋刘向宇刘颖
Owner TSINGHUA UNIV
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