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Data enhancement transmitting and receiving method based on planisphere extension

A technology of a receiving method and a transmission method, which is applied in the field of enhanced data transmission and reception based on constellation diagram expansion, can solve the problem that the channel capacity is not fully utilized, and achieve the effect of improving the spectrum utilization rate

Active Publication Date: 2013-05-01
TSINGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the downlink of traditional digital terrestrial broadcasting and broadband wireless mobile communication, especially in the broadcast and multicast modes, the maximum transmission rate of the system is consistent with the minimum channel capacity of users within the coverage area, that is, all users within the coverage area have The same data transmission rate, so that the channel capacity of users with better channel conditions is not fully utilized

Method used

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  • Data enhancement transmitting and receiving method based on planisphere extension
  • Data enhancement transmitting and receiving method based on planisphere extension
  • Data enhancement transmitting and receiving method based on planisphere extension

Examples

Experimental program
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Effect test

Embodiment 1

[0045] The present invention proposes a data enhancement transmission method based on constellation extension, such as figure 1 shown, including the following steps:

[0046] S1. Add enhanced data on the basis of retaining the basic data of the original system to obtain the current system including the basic data and the enhanced data; independently perform channel coding and bit interleaving on the information bits of the basic data and the enhanced data to obtain Coded bits for basic data and coded bits for enhanced data;

[0047] S2. Obtain an extended constellation diagram and an extended constellation map;

[0048] S3. Using the extended constellation mapping, perform constellation mapping on the coded bits of the basic data and the coded bits of the enhanced data to obtain a transmission symbol sequence;

[0049] S4. After processing the transmitted symbol sequence, send it to the receiving end via a channel.

[0050] Among them, the basic data is data provided for al...

Embodiment 2

[0077] This embodiment has specifically described the application of the backward compatibility mode of the transmission method in the embodiment 1 in the DTMB system, and its flow chart is as follows figure 2 shown, including:

[0078] SA1. Add enhanced data on the basis of retaining the basic data of the original system to obtain the current system including the basic data and the enhanced data; independently perform channel coding and bit interleaving on the information bits of the basic data and the enhanced data to obtain Coded bits for basic data and coded bits for enhanced data;

[0079] SA2, use one The order constellation diagram replaces the original system's For each constellation point in the order constellation diagram, get Order extended constellation diagram and extended constellation map, where m A and m O is a positive integer, m E for m A and m O the sum of m E =m O +m A ;

[0080] SA3. Using the extended constellation mapping, perform constel...

Embodiment 3

[0098] This embodiment specifically describes the use of the backward incompatible mode of the transmission method in Embodiment 1 in the DTMB system, and its flow chart is as follows Figure 5 shown, including:

[0099] SB1. Add enhanced data on the basis of retaining the basic data of the original system to obtain the current system including the basic data and the enhanced data; independently perform channel coding and bit interleaving on the information bits of the basic data and the enhanced data to obtain Coded bits for basic data and coded bits for enhanced data;

[0100] SB2, with a redesigned The order constellation diagram replaces the original system's order constellation diagram, and use it as an extended constellation diagram to obtain an extended constellation map, where m E and m O is a positive integer, m E greater than m O ;

[0101] SB3. Using the extended constellation mapping, perform constellation mapping on the coded bits of the basic data and the...

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Abstract

The invention provides a data enhancement transmitting method based on planisphere extension. The method comprises the following steps of S1, respectively and independently performing channel encoding and bit interleaving on information bits of basic data and enhanced data to obtain encoding bits of the basic data and the enhanced data; S2, acquiring expanded planisphere and expanded constellation mapping of the current system; S3, performing constellation mapping on the encoding bits of the basic data and the enhanced data by using the expanded constellation mapping to obtain a transmitting mark sequence; and S4, after performing subsequent processing on the transmitting mark sequence, transmitting the transmitting mark sequence to a receiving end. Additional data transmission rate is provided to a user with better channel state, in a backward compatible way, generally, the data rate of a user is kept unchanged and the receiving performance is relatively low in loss, and in a backward incompatible way, generally, the data rate and the receiving performance of the user are kept unchanged or are improved. The invention also provides a data enhancement receiving method based on planisphere extension.

Description

technical field [0001] The invention relates to the technical field of digital information transmission, in particular to a data enhanced transmission and reception method based on constellation diagram expansion. Background technique [0002] In the downlink of digital terrestrial broadcasting or broadband wireless mobile communication, because the received signal power decreases with the increase of the distance from the transmitting base station, and the received noise power is almost constant, therefore, the receiver input signal-to-noise ratio increases with the The distance from the transmitting base station decreases, that is, the channel capacity of the user decreases as the distance from the transmitting base station increases. [0003] In the downlink of traditional digital terrestrial broadcasting and broadband wireless mobile communication, especially in the broadcast and multicast modes, the maximum transmission rate of the system is consistent with the minimum ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00
Inventor 宋健金黄平彭克武程涛杨知行
Owner TSINGHUA UNIV
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