Constant envelope multiplexing method, device and receiving method of dual-frequency four-component spread-spectrum signal

A spread spectrum signal, constant envelope technology, applied in the field of satellite positioning and navigation, can solve problems such as reducing the flexibility of AltBOC

Active Publication Date: 2016-03-30
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This limitation reduces the flexibility of AltBOC usage

Method used

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  • Constant envelope multiplexing method, device and receiving method of dual-frequency four-component spread-spectrum signal
  • Constant envelope multiplexing method, device and receiving method of dual-frequency four-component spread-spectrum signal
  • Constant envelope multiplexing method, device and receiving method of dual-frequency four-component spread-spectrum signal

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Embodiment Construction

[0053] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0054] In the satellite navigation system, the receiver needs to use the frequently reversed phase of the spreading code for ranging, and also needs to demodulate the message information modulated in the signal to obtain ephemeris information and other information broadcast by the system. Therefore, each signal component transmitted contains a binary data stream and a spreading code. For some service signals in practical applications, there may be no modulation message on it. This situation is equivalent to the data stream on the signal component of this channel is a constant value of 0 or 1. In the following, we will refer to this no modulation message information The channel is called the pilot channel.

[0055] The invention can realize constant envelope multiplexing of four signal components at two frequency points. Note that these two frequency points ...

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Abstract

The constant-envelope multiplexing method of dual-frequency four-component spread-spectrum signals generates four signal components into corresponding baseband spread-spectrum signals, and obtains corresponding additional phases according to the value combination state of baseband spread-spectrum signals in the current time period; The additional phase is passed through the trigonometric function generator to generate a pair of components whose phases are orthogonal to each other; then the carrier generator generates two carrier waves whose phases are orthogonal to each other, and are multiplied and subtracted by the generated components respectively to obtain a constant envelope Conditional radio frequency signal, the present invention provides the generation device of this constant-envelope multiplexing signal at the same time, and its receiving method, the present invention synthesizes four signal components of two frequency points into a constant-envelope signal, makes low-end The receiver can process the signal with a narrower receiving bandwidth and lower baseband processing complexity to obtain basic ranging performance. High-end receivers exchange wider receiving bandwidth and higher processing complexity for more excellent ranging performance The range accuracy is improved, and the ranging performance when each signal component is received separately is improved.

Description

technical field [0001] The invention is applied in the field of satellite positioning and navigation completed by radio, and is especially suitable for the global navigation satellite system (GNSS) using DSSS signals as ranging signals, and specifically relates to the constant envelope multiplexing method of dual-frequency four-component spread spectrum signals, device and receiving method. Background technique [0002] With the continuous construction of the Global Navigation Satellite System (GNSS), the demand for navigation services continues to expand. The number of signals broadcast by various satellite navigation systems on the same frequency band is increasing, which makes the original limited satellite navigation spectrum more and more crowded. As the number of signals broadcast by the same system in the same frequency band increases, the complexity of satellite payloads continues to increase. [0003] For some specific system construction requirements and applicat...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26H04J13/12H04L25/02H04L5/00G01S19/37
CPCG01S19/02H04B1/707G01S19/30G01S19/37H04J13/0003H04J13/18
Inventor 姚铮陆明泉
Owner TSINGHUA UNIV
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