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Framing method and device for narrowband data broadcasting, and physical layer signal frame

A narrow-band data and framing technology, which is applied in the field of communication, can solve problems such as inappropriate transmission of differential data, and achieve the effect of improving transmission efficiency and high transmission efficiency

Pending Publication Date: 2022-02-25
湖南省时空基准科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] Although the three technologies of HDradio, CDR, and NBB are parasitic FM broadcasting technologies, HDradio and CDR are not suitable for transmitting differential data.

Method used

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  • Framing method and device for narrowband data broadcasting, and physical layer signal frame
  • Framing method and device for narrowband data broadcasting, and physical layer signal frame
  • Framing method and device for narrowband data broadcasting, and physical layer signal frame

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Embodiment Construction

[0093] The technical solutions in the present invention are clearly and completely described below in combination with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0094] The technical solution of the present application will be described in detail below with specific embodiments. The following specific embodiments may be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments.

[0095] Such as figure 2 The block diagram of the NBB system structure is shown. The business data to be transmitted by the upper layer enters the NBB system. In the NBB system, scrambling, channel coding...

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Abstract

The invention discloses a framing method and device for narrowband data broadcasting, and a physical layer signal frame. Two paths of pseudorandom sequences are subjected to a series of transformation to form a synchronous beacon, 32 MID sequences are subjected to a series of transformation to form a transmission mode beacon, the synchronous beacon and the transmission mode beacon form a beacon, a physical layer signal frame is formed by 58 OFDM symbols and beacons, and a superframe is formed by one or four physical layer signal frames. The method adopts a shorter frame structure and a smaller interleaving block structure, so that the delay ratio of modulation and demodulation of digital signals is small, and the requirement of differential data on high transmission delay is better met. Program information in an audio program does not need to be transmitted, a single transmission channel mode different from HDradio and CDR is adopted, all channel resources can be used for transmitting differential data, and the transmission efficiency is high.

Description

technical field [0001] The invention relates to the communication field, in particular to a narrowband data broadcasting framing method, equipment, and a physical layer signal frame. Background technique [0002] With the continuous development of global satellite navigation GNSS technology, the satellite navigation standard positioning accuracy of a few meters to more than ten meters can no longer meet the needs of users for high-precision positioning. Differential GNSS technology, which can effectively improve positioning accuracy by using the space and time correlation characteristics of GNSS observation errors, has been widely used. At present, differential GNSS equipment is mainly based on pseudo-range differential GNSS and carrier phase differential GNSS, and its positioning accuracy can reach sub-meter level and centimeter level respectively. With the rapid development of the field of differential satellite navigation and positioning, real-time dynamic carrier phase ...

Claims

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Application Information

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IPC IPC(8): H04L27/26H04L1/00
CPCH04L27/2655
Inventor 唐焰宫丰奎李果朱钧肖剑熊元希
Owner 湖南省时空基准科技有限公司
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