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Constant envelop multiplexing method, generating device and receiving method for navigation signal

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

Active Publication Date: 2014-05-14
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This technical limitation reduces the flexibility of the use of AltBOC and TD-AltBOC

Method used

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  • Constant envelop multiplexing method, generating device and receiving method for navigation signal
  • Constant envelop multiplexing method, generating device and receiving method for navigation signal
  • Constant envelop multiplexing method, generating device and receiving method for navigation signal

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Embodiment Construction

[0069] The present invention will be further described in detail below with reference to the drawings and embodiments.

[0070] In a satellite navigation system, the receiver needs to use the frequently inverted phase of the spreading code for ranging, and it also needs to demodulate the message information modulated in the signal to obtain ephemeris information and other information broadcast by the system. Therefore, every signal component transmitted contains binary data stream and spreading code. For some service signals, there may be a pilot channel without text modulation. In this case, the data stream on the signal component of this channel can be regarded as a constant value of 0 or 1.

[0071] The constant envelope multiplexing method of the navigation signal of the present invention can realize the constant envelope multiplexing of the four signal components at two frequency points at most, and these two frequency points are respectively denoted as f 1 And f 2 , And let f...

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Abstract

Provided are a satellite navigation signal and a generation method, generation device, receiving method and receiving device for a satellite navigation signal. The satellite navigation signal generation device comprises a baseband signal generator, a multiplexing signal generator and a modulator. The baseband signal generator generates a first baseband signal S1, a second baseband signal S2, a third baseband signal S3 and a fourth baseband signal S4. The multiplexing signal generator sets the amplitudes and phases of in-phase baseband components and quadrature baseband components of a multiplexing signal of the first baseband signal S1, the second baseband signal S2, the third baseband signal S3 and the fourth baseband signal S4, so as to generate a multiplexing signal having a constant envelope. The modulator modulates the multiplexing signal having the constant envelope to a radio frequency to generate a satellite navigation signal. The first baseband signal S1 and the second baseband signal S2 are modulated at a first carrier frequency f 1 and their carrier phases are orthogonal to each other, and the third baseband signal and the fourth baseband signal are modulated at a second carrier frequency f 2 and their carrier phases are orthogonal to each other.

Description

Technical field [0001] The invention belongs to the field of satellite positioning and navigation, and is particularly suitable for global navigation satellite systems using DSSS signals as ranging signals, and relates to a constant envelope multiplexing method, a generating device and a receiving method for navigation signals. 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, making the originally limited satellite navigation spectrum 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] If different service signals in a frequency band use independent transmitting antennas and amplifier links, the requirements for antenna design and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S19/02
CPCH04L5/12H04L27/366H04L5/06G01S19/01G01S19/24G01S19/35H04L27/362G01S19/31G01S19/02H04B1/7087H04B1/707G01S19/13H04L5/00H04L25/02H04L27/26H04B1/709H04L27/2627
Inventor 姚铮陆明泉
Owner TSINGHUA UNIV
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