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A frequency hopping communication method based on orthogonal frequency division multiplexing

An orthogonal frequency division and frequency hopping communication technology, applied in the field of wireless communication, can solve the problems of different statistical characteristics, communication quality and reliability degradation, etc., to achieve the effect of improving security and reliability

Active Publication Date: 2010-10-13
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, frequency selective channel fading will make OFDM sub-carrier channels present different statistical characteristics. When the number of sub-channels with relatively poor quality increases, the quality and reliability of communication will decrease.

Method used

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  • A frequency hopping communication method based on orthogonal frequency division multiplexing
  • A frequency hopping communication method based on orthogonal frequency division multiplexing
  • A frequency hopping communication method based on orthogonal frequency division multiplexing

Examples

Experimental program
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Embodiment Construction

[0022] refer to figure 1 , is a flow block diagram of an OFDM-based frequency hopping communication method according to an embodiment of the present invention. The process is as follows:

[0023] Step 110: Setting a frequency hopping pattern.

[0024] The frequency hopping pattern can be known in advance by both the sending and receiving ends, or can be notified to the receiving end by the sending end. Let one or a group of subcarriers of all subcarriers in the OFDM system carry and transmit data, and the subcarriers or subcarriers in the subcarrier group are selected according to the frequency hopping pattern, and the design of the frequency hopping pattern can be a pseudo-random sequence or a non-random sequence sequence. According to the assignment of the frequency hopping pattern, the subcarriers carrying data in two adjacent OFDM symbols, the subcarrier group or the subcarriers in the subcarrier group can be different, and the transmitting end configures subcarriers fo...

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Abstract

The invention discloses a jump-frequncy communication method which is based on orthogonal frequency division complexing, firstly setting jump-frequncy pattern, the jump-frequncy pattern can be known to receiving and sending, and sending end can inform the receiving end in mode of message; then sending end sends data based on the jump-frequncy pattern, OFDM system of the sending end loads data to be sent to corresponding sub carrier or sub carrier set according to the jump-frequncy pattern; at last the receiving end receives data based on the jump-frequncy pattern, OFDM system of the receivingend receives based on known in advance or informed jump-frequncy pattern in mode of message. With the method of the invention, safety and reliability of data can be increased, at the same time multiple address transmission capability can be increased.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a frequency hopping communication method based on Orthogonal Frequency Division Multiplexing (OFDM). Background technique [0002] Frequency hopping communication is to send information by making the operating frequency of the transmitter hop according to a certain frequency hopping pattern, and the receiver captures and synchronizes the sending frequency to receive data from the transmitter with the corresponding frequency hopping pattern. Frequency hopping communication has good confidentiality, strong anti-interference ability, frequency diversity function, can be easily compatible with narrowband communication system, and has no near-far effect, which is very suitable for military communication applications. The pseudo-randomness of the frequency hopping pattern and the key amount of the frequency hopping pattern make the frequency hopping system confidential. When the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26H04B1/713
CPCH04L27/2602
Inventor 李峰何钢王彬刘巧艳李杰
Owner ZTE CORP