A method and device for determining the starting position of an access preamble
A start position and preamble technology, applied in the field of determining the start position of the access preamble, can solve the problems of large amount of computation and reduced detection efficiency, and achieve the effect of reducing computational complexity and improving wireless communication performance
Inactive Publication Date: 2016-08-10
HISILICON TECH
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[0006] From the above description, it can be seen that the detection scheme of the above-mentioned Preamble start position has the disadvantage of a huge amount of calculation, which leads to a decrease in detection efficiency.
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[0047]The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0048] Embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0049] A method for determining the starting position of the access preamble provided by an embodiment of the present invention, such as figure 2 As shown, can include:
[0050] Step 21, dividing the received antenna data into a plurality of equal-length sub-pilot signals;
[0051] Step 22, converting the data for...
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The invention discloses a method for determining a starting position of a preamble. The method comprises the following steps: dividing received antenna data into multiple equilong sub-pilot signals, and converting data consisting of the two adjacent sub-pilot signals into multiple equilong frequency-domain sub-pilot signals; filling zero behind each scrambled pilot signal in multiple locally-generated scrambled pilot signals to obtain zero-filled data with the length equal to the total length of the two sub-pilot signals, and converting the zero-filled data into multiple frequency-domain zero-filled data, wherein the length of the scrambled pilot signal is equal to the that of the sub-pilot signal; and based on the multiple equilong frequency-domain sub-pilot signals and the multiple frequency-domain zero-filled data, determining the starting position of the preamble. By the embodiment of the invention, the calculating complexity in the process of determining the starting position of the preamble in a wireless communication system can be effectively reduced and the wireless communication performance can be improved.
Description
technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a method and a device for determining the starting position of an access preamble. Background technique [0002] In UMTS (Universal Mobile Telecommunications System, which means universal mobile communication system), wireless terminals such as mobile phones need to implement the access process with the base station through the Preamble (access preamble) sent first. Moreover, the corresponding base station also needs to perform preamble detection in the entire cell range to confirm whether there are wireless terminals such as mobile phones accessing the network. [0003] When the Preamble is sent, it needs to be scrambled according to the scrambling code provided by the base station. Therefore, the energy value after the correlation detection can be obtained by performing a correlation operation on the received antenna data and the known scrambling code. B...
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IPC IPC(8): H04W74/08
Inventor 梅楠楠
Owner HISILICON TECH