Short-term burst spread spectrum signal transmitting and receiving method

A technology of burst spread spectrum signal and receiving method, applied in the field of spread spectrum, can solve the problems of not considering the application of unique code, the length of the preamble sequence, and the reduction of transmission efficiency.

Inactive Publication Date: 2012-01-25
SHANGHAI JIAO TONG UNIV
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These algorithms either do not use the preamble sequence of the burst frame, or only use the all "1" or all "0" part of the preamble sequence in the burst frame, and do not consider the application of the unique code

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  • Short-term burst spread spectrum signal transmitting and receiving method
  • Short-term burst spread spectrum signal transmitting and receiving method
  • Short-term burst spread spectrum signal transmitting and receiving method

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Embodiment Construction

[0049] The present invention will be further explained below in conjunction with the drawings.

[0050] figure 1 It is a burst spread spectrum signal frame structure provided by the present invention. The burst spread spectrum signal frame structure is composed of a unique code and carrying data, and the unique code is used as a preamble sequence. The framed data and spreading code are subjected to spreading processing, and then shaping filtering and BPSK modulation are performed. Wherein, the use of the unique code as the preamble sequence should be understood as: the present invention only uses the unique code in the burst preamble sequence, and does not use all "1" or all "0" sequences.

[0051] figure 2 It is the short-time burst spread spectrum signal receiving method provided by the present invention. The receiver adopts a burst signal receiving method based on differential operation, which can quickly complete tasks such as burst signal detection, PN code capture, freque...

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Abstract

The invention provides a short-term burst spread spectrum signal transmitting and receiving method which comprises the following steps of: 1) enabling unique codes and carrying data to constitute a burst spread spectrum signal frame structure, wherein the unique codes play a role of a leader sequence; and 2) enabling a receiving machine to adopt a burst signal receiving method based on differential operation, and simultaneously and quickly completing burst signal detection, PN (pseudo noise) code acquisition, frequency offset estimation, frame synchronization detection and symbol timing acquisition tasks. In the method provided by the invention, only the unique codes are used in the burst leader sequence, and the all-1 or all-0 sequence is not used, so that the transmission efficiency is improved. Simultaneously, the invention further provides a burst signal receiving method based on the differential operation, which can simultaneously and quickly complete the burst signal detection, PN code acquisition, frequency offset estimation, frame synchronization detection, symbol timing acquisition and other tasks.

Description

technical field [0001] The invention relates to the spread spectrum technology in wireless communication, in particular to a short-time burst spread spectrum signal transmission and reception method. Background technique [0002] Spread spectrum communication technology is widely used in civil and military fields due to its advantages of anti-interference, anti-multipath, good confidentiality, and difficult to intercept. During the communication process of the wireless channel, the channel parameters often show relatively drastic changes over time, so the burst mode is usually used. [0003] The difficulty of burst mode transmission lies in the rapid estimation of synchronization parameters and channel parameters, and the burst signal reception using direct sequence spread spectrum technology makes it more difficult to quickly capture and estimate quickly. The burst transmission mode is to transmit data in units of a single data packet, and the data packet unit can be sent ...

Claims

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Application Information

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IPC IPC(8): H04B1/7075H04L25/02
Inventor 吴团锋徐友云归琳熊箭马文峰徐胤
Owner SHANGHAI JIAO TONG UNIV
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