TD-ALtBOC signal receiving method and device
The technology of a receiving method and a receiving device, which is applied in the field of global satellite navigation, can solve problems such as the complexity of the TD-AltBOC signal demodulation method, and achieve the effects of reducing the complexity of receiving, simplifying the implementation, and saving hardware resources
Inactive Publication Date: 2017-06-06
HUAZHONG UNIV OF SCI & TECH
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[0007] Aiming at the above defects or improvement needs of the prior art, the present invention provides a method and device for receiving TD-AltBOC signals, which aim at TD-AltBOC signal carrier, pseudo code synchronization and data demodulation, thereby solving the problem of existing TD -AltBOC signal demodulation method realizes complex technical issues
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[0038] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.
[0039] Such as figure 1 Shown, the inventive method comprises the following steps:
[0040] (1) Convert the TD-AltBOC radio frequency signal to an intermediate frequency, then band-pass filter and sample the signal, and use the local carrier to strip the carrier of the sampled signal to obtain a sampled baseband signal;
[0041] (2) Time-division correlation of the sampled baseband signal and ...
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The present invention discloses a TD-ALtBOC signal receiving method, belonging to the global satellite navigation field. The present invention comprises the following steps: converting TD-ALtBOC radio-frequency signals into intermediate frequency, performing band pass of filtering signals and performing sampling. The local carrier is configured to peel a sampling signal carrier to obtain a sampling baseband signals; performing time correlation of the local waveform and the sampling baseband signals chip by chip; performing modulation according to the related output signals, and obtaining a carrier phase deviation estimated value and a code phase deviation estimation value according to the related output signals; generating the local waveform according to the phase deviation estimation value; and generating the local carrier according to the carrier phase deviation estimation value. The present invention realizes a TD-ALtBOC signal receiving device. According to the technical scheme, the implement is simple, the receiving complexity is reduced, and the hardware resource is saved.
Description
technical field [0001] The invention belongs to the field of global satellite navigation, and more specifically relates to a method and device for receiving TD-AltBOC signals. Background technique [0002] The B2 frequency band of the Beidou navigation system includes two sub-bands, B2a and B2b: B2a is the lower sideband, with a center frequency at 1176.45MHz, which is the same as the GPS L5C carrier frequency; B2b is the upper sideband, with a center frequency at 1207.14MHz, which is the same as the B2 signal frequency of the Beidou navigation system . [0003] Because the AltBOC modulation method has the ability to carry different services on the upper and lower sidebands, it can receive and process single sideband signals independently to achieve the performance of traditional BPSK signals, and can also be processed jointly to achieve higher positioning accuracy. It is adopted as GalileoE5a and E5b frequency bands The modulation method of the navigation signal. The AltB...
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IPC IPC(8): H04L27/20G01S19/24G01S19/30
CPCG01S19/243G01S19/30H04L27/20G01S19/29H04L27/22H04L27/2278H04L2027/0028
Inventor 唐祖平魏蛟龙肖璇李天
Owner HUAZHONG UNIV OF SCI & TECH