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Synchronous detection method for burst broadband communication

A technology of synchronous detection and broadband communication, which is applied in wireless communication, synchronous devices, electrical components, etc., and can solve the problems that the synchronization method cannot solve the synchronization problem of sudden broadband communication well

Active Publication Date: 2019-12-06
BEIJING GUODIANTONG NETWORK TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Existing synchronization methods cannot solve the synchronization problem of bursty broadband communication well, therefore, there is an urgent need for a method that can better synchronize bursty broadband communication

Method used

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  • Synchronous detection method for burst broadband communication
  • Synchronous detection method for burst broadband communication
  • Synchronous detection method for burst broadband communication

Examples

Experimental program
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Effect test

Embodiment 1

[0081] Data frame structure like Figure 5 As shown, in the TDD frame structure of broadband burst communication, in the uplink and downlink subframes, the synchronization word is not at the beginning of the frame, the first time slot is the frame control time slot, followed by synchronization word 1, synchronization word 2, Synchronization word 3, followed by the data time slot. The length of the sync word is 32 bits.

[0082] The structure of the double sliding window frame is as follows Figure 6 As shown, the first sliding window A and the second sliding window B are arranged sequentially from the direction of signal transmission, and the length of window A and window B is the same, both of which are 16 bits.

[0083] see Figure 7 As shown in the flow chart, the double sliding window frame is always in the working state, and the time is calculated by the formula and the formula Calculate the signal energy values ​​in window A and window B respectively, and pass the...

Embodiment 2

[0095] see Figure 10 , for the specific workflow of the receiver. A four-state state machine is designed in the receiver for synchronization processing. After power-on, during the initialization period, the state machine enters the Idle (idle mode) state. After detecting the first peak value, it enters state a. In state a, Continue to detect the peak value, if the second peak value is found, and the time difference is 32 bits from the first peak value, it is considered that the second synchronization word has been detected, and enters state b, otherwise enters the Idle state; in state b, continue to detect correlation Peak value, if the third peak value is detected, and the distance between the third peak value and the second peak value is 32 bits different, then enter state c, in state c, output the judgment success flag, otherwise, enter the idle state.

[0096] In this embodiment, the receiver starts only when frame_flag=1 is received, and when frame_flag=1 is not detecte...

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Abstract

The invention discloses a synchronous detection method for burst broadband communication. The synchronous detection method comprises the following steps: detecting the arrival state of a data frame ina burst communication signal in a channel; when the arrival state is that the data frame arrives, removing useless signals, wherein the useless signals comprise signals before the arrival time of thedata frame; reserving a useful signal, wherein the useful signal comprises a data frame arrival time and a signal after the data frame arrival time; and detecting the synchronization state of the synchronization word in the data frame of the useful signal and the synchronization word in the local data frame. The invention also provides a synchronous detection device for burst broadband communication. The synchronous detection device comprises a frame synchronous detection module; a signal processing module; and a bit synchronization detection module.

Description

technical field [0001] The invention relates to the technical field of broadband communication, in particular to a synchronous detection method for burst broadband communication. Background technique [0002] In broadband burst wireless communication, the quality of synchronization performance directly determines the level of system performance. Once out-of-synchronization occurs in any communication system, the entire communication will inevitably be interrupted. [0003] In broadband systems, synchronization technology is difficult to implement and the technology is complex. The main reason is that the communication speed is fast. For example, when the communication rate reaches 100Mbps, the synchronization module handles such a high data flow. For some complex processing, it is necessary to use a clock several times the communication rate. To deal with it, and currently the fastest FPGA device, the operating frequency cannot exceed 300MHZ, otherwise there will be serious ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W24/02H04W56/00
CPCH04W24/02H04W56/001Y02D30/70
Inventor 周寒冰张传远薛青山齐永忠徐成梅王国松王光磊宿剑飞
Owner BEIJING GUODIANTONG NETWORK TECH CO LTD
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