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Method and equipment for detecting information packet

A detection device and information packet technology, applied in the field of information packet detection, can solve the problems of indistinguishable information packets and noise, loss of important information, etc.

Inactive Publication Date: 2006-02-01
SILICON INTEGRATED SYSTEMS
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  • Description
  • Claims
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Problems solved by technology

Also in the case that the pseudo-noise code is short, the result of the correlation coefficient is easily affected by noise and the multi-path transmission process (multi-path effect), making it difficult to distinguish the information packet from the noise
Therefore, the known information packet detection method cannot effectively and accurately judge and detect the shorter pseudo-noise code in the previous code, resulting in the loss of important information in some information packets

Method used

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  • Method and equipment for detecting information packet
  • Method and equipment for detecting information packet
  • Method and equipment for detecting information packet

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Embodiment Construction

[0024] Please refer to figure 2 . figure 2 It is a flow chart of the packet detection method of the present invention. In step 100, an input signal r(n) is received. The input signal r(n) contains multiple packets. And each information packet contains the preamble code that is used for information packet detection. As mentioned before, the front-end code includes several periodic pseudo-noise codes, or called a pseudo-noise code sequence. Therefore, the front segment code of a packet can be expressed as follows:

[0025] x ( n ) = Σ k s ( k ) c ( n - Nk )

[0026] Where x(n) represents the preceding code, s(k) represents the PSK (Phase Shift Keying) signal, and c(n) represents the pseudo-noise code with a length...

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Abstract

The method includes steps: obtaining correlation coefficient of input message received by receiver; detecting peak energy of the input message; based on the said correlation coefficient and the peak energy, determining whether a information packet is detected. The disclosed method raises quality of detecting information packet, and reduces of error for detecting information packet effectively.

Description

technical field [0001] The invention relates to a detection method, in particular to an information package detection method. Background technique [0002] In today's communication systems, data is often transmitted in the form of packets. However, when a signal is transmitted over a transmission medium such as a transmission line or in the air, the signal is subject to noise and multipath interference. Therefore, the signal received at the receiver is a distorted communication signal plus a lot of noise. In order to correctly interpret the received signal, the operation of packet detection must be performed. [0003] In order to distinguish the information packet from the noise, a known method is to place a preamble code in front of the information packet as a basis for judging the information packet detection. Usually, this front-end code is a string of pseudo-noise codes (pseudo-noise code). Please refer to figure 1 . figure 1 is a schematic diagram of a packet detec...

Claims

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Application Information

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IPC IPC(8): H04L1/20
Inventor 侯文生林建成
Owner SILICON INTEGRATED SYSTEMS
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