Pilot frequency sequence generation method and system

A technology of pilot sequence and generation module, applied in the field of communication, can solve the problems of illegal user information eavesdropping and key breaking hidden dangers, and achieve the effect of randomness and enhanced security.

Active Publication Date: 2011-11-09
BEIJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

In the current wireless communication system, the pilot sequence and pilot pattern are determined according to the communication protocol. Therefore, both legitimate users and eavesdropping users can estimate the channel state information based on the known pilot sequence, so as to realize the coherent detection of the received signal. This leaves hidden dangers for illegal users' information eavesdropping and key cracking

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  • Pilot frequency sequence generation method and system
  • Pilot frequency sequence generation method and system
  • Pilot frequency sequence generation method and system

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Embodiment Construction

[0029] The main idea of ​​the present invention is to use the essential characteristics of the wireless channel such as randomness, privacy, and reciprocity to perform randomization operations on the pilot sequence, so that only authenticated legitimate users can learn the randomized pilot and achieve coherent Receiving, enhancing the communication security of legitimate users.

[0030] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0031] According to an embodiment of the present invention, a method for generating a pilot sequence is provided. refer to figure 1 , figure 1 It is a flow chart of the pilot sequence generation method of the embodiment of the present invention, including (steps 12-14):

[0032] In step 12, both communication parties obtain channel characteristics of the wirel...

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Abstract

The invention discloses a pilot frequency sequence generation method and system, wherein the method comprises the following steps that: both parties in communication respectively obtain the channel characteristic of a wireless channel; and the both parties in communication map an estimation value of the channel characteristic in real time to generate a random pilot frequency sequence. With the method and the system provided by the invention, both legal parties in communication can obtain consistent channel characteristics based on the reciprocity of uplink and downlink channels, and further generate the private and random pilot frequency sequence based on characters of physical layer information of a wireless communication system, wherein the generation process is free from transmitting related information in the wireless channel, so that communication security is improved.

Description

technical field [0001] The invention relates to the communication field, in particular to a method and system for generating a pilot sequence. Background technique [0002] With the rapid development of wireless communication technology and its deep penetration into various fields of society, due to the openness of wireless channels in wireless communication systems, the air interface is vulnerable to eavesdropping, tampering, deletion and other types of attacks, and has become a weak link in wireless communication systems. Therefore, it is necessary to design a more effective security guarantee mechanism for the broadcast characteristics of wireless channels. [0003] At present, the reception and detection methods of wireless communication usually adopt coherent reception assisted by channel state information, and the channel state acquisition methods usually include non-blind estimation method and blind estimation method based on pilot and / or training sequence assistance....

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L25/02H04L27/26
Inventor 彭岳星卢向雨马浩郑侃王文博
Owner BEIJING UNIV OF POSTS & TELECOMM
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