Adjustment Method of Transmit Channel Delay in Satellite Navigation Digital Multi-beam System

A digital multi-beam, transmission channel technology, applied in satellite radio beacon positioning systems, radio wave measurement systems, measurement devices, etc., can solve the problems of inconsistent signal delay between channels, affecting the pointing accuracy of synthetic beams, and achieve adjustment accuracy. high effect

Active Publication Date: 2018-08-14
NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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  • Application Information

AI Technical Summary

Problems solved by technology

However, in practical applications, the software and hardware between different channels cannot be completely consistent, resulting in inconsistent signal delays between channels, which in turn affects the pointing accuracy of the synthesized beam

Method used

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  • Adjustment Method of Transmit Channel Delay in Satellite Navigation Digital Multi-beam System
  • Adjustment Method of Transmit Channel Delay in Satellite Navigation Digital Multi-beam System
  • Adjustment Method of Transmit Channel Delay in Satellite Navigation Digital Multi-beam System

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Embodiment Construction

[0038] The application flow chart of the satellite navigation digital multi-beam system transmission channel delay adjustment method of the present invention is as follows figure 1 As shown, this method adjusts the internal second pulse and pseudo-code clock by controlling the phase control word of the internal DDS of the digital multi-beam transmitting terminal, and realizes the adjustment of the transmission channel delay; this method can automatically implement multiple transmissions under software control. Channel delay is adjusted.

[0039] The specific steps are as follows:

[0040] (101) Measure the time interval between the rising edge of the second pulse externally provided and the initial phase rising edge of the pseudocode signal generated internally in the current transmission channel, and this time interval is the time delay value t of the current transmission channel 1 ; The digital multi-beam transmitting terminal generates a navigation spread spectrum signal, ...

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Abstract

The invention discloses a method for adjusting the time delay of a transmission channel of a satellite navigation digital multi-beam system. The method includes: measuring the time delay value of the transmission channel; calculating the time delay error; judging whether adjustment is required according to the time delay error; If the adjustment is completed or no adjustment is required, it is ready to adjust the delay of the next channel, otherwise, the delay adjustment amount is calculated according to the delay error; the delay is adjusted roughly; after the fine adjustment of the delay, the delay adjustment of the next channel is ready ;By controlling the phase control word of the internal DDS of the transmitting terminal, the high-precision adjustment of the pseudo-code clock and second synchronization pulse can be realized, so as to quickly and accurately adjust the delay of the transmission channel of the multi-beam system, and can realize automatic multi-beam under software control The delay of each transmit channel is adjusted.

Description

technical field [0001] The invention relates to a time delay adjustment method of a transmission channel. Satellite navigation digital multi-beam launch system has the function of uplink injection to multiple satellites at the same time. Background technique [0002] The digital multi-beam transmitting system combines array antenna and digital signal processing technology, and has the function of uplink injection to multiple satellites at the same time. The baseband signal generation and beam synthesis of the digital multi-beam system are both realized in the digital domain. The synthesized digital signal is transformed into an analog radio frequency signal through D / A and up-conversion, and is radiated by the antenna element to form a corresponding beam in the air. [0003] Since the entire transmission system requires multiple transmission channels to work together, all transmission channels are required to have the same time delay. However, in practical applications, th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S19/02
CPCG01S19/02
Inventor 韩双林尹继凯李刚董立桥王跃翟江鹏
Owner NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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