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Data transmission method, device and system based on dual-carrier modulation (DCM)

A data transmission method and dual-carrier modulation technology, which is applied in the field of communication, can solve the problems of high bit error rate in data transmission and the inability to obtain bit data at the receiving end, so as to reduce the bit error rate and improve reliability

Active Publication Date: 2017-03-22
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Using the above technology for data transmission makes it impossible for the receiving end to obtain the bit data that was knocked out during the punching process, resulting in a high bit error rate for data transmission

Method used

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  • Data transmission method, device and system based on dual-carrier modulation (DCM)
  • Data transmission method, device and system based on dual-carrier modulation (DCM)
  • Data transmission method, device and system based on dual-carrier modulation (DCM)

Examples

Experimental program
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Effect test

Embodiment 1

[0179] Scenario: Wi-Fi wireless network outdoor channel, downlink, OFDM, single-user single-input single-output (Single-user Single-input Single-output, hereinafter referred to as: SU-SISO), that is, the AP serves one STA, and adopts the present invention The transmission mode provided by the embodiment sends a signal field B (signalfield B, SIGB for short) signal to the STA. The transmission bandwidth is 20MHZ, and the number of subcarriers is 64. The 64 sub-carriers are numbered as {-32,-31,...,-1,0,1,...,31}. Wherein, the available 52 sub-carrier numbers are {-26,-25,...,-1,1,...,25,26}. Among the 52 available subcarriers, subcarriers numbered {-21,-7,7,21} are used to carry pilot signals, and the remaining 48 subcarriers are used to carry useful data. At the same time, suppose the size of the data to be transmitted is 72 bits, denoted as {x 0 ,...,x 71}, and set the modulation and coding method of the sent data to QPSK 3 / 4. Figure 24 The sender flow of the proposed t...

Embodiment 2

[0186] The scenario and sending and receiving process are the same as those in Embodiment 1, the difference is:

[0187] Suppose the size of the data to be transmitted is 64 bits, denoted as {x 0 ,...,x 63}, and set the modulation and coding method of the sent data to QPSK 2 / 3.

[0188] On the AP side (transmitter), the AP first sends the data to be transmitted {x 0 ,...,x 63} Input a BCC encoder with a coding rate of 1 / 2 to perform BCC, and obtain encoded bits {X 0 ,...,X 127}, namely the first data; copy the first data to get the second data {Y 0 ,...,Y 127}, here, the first data {X 0 ,...,X 127} and second data and {y 0 ,...,Y 127} are the same, except that different letters are used for symbol representation; then, in order to obtain a sequence with a transmission code rate of 2 / 3, the AP uses different puncturing modes to process the first data {X 0 ,...,X 127} and the second data {Y 0 ,...,Y 127} to punch holes. For the first data {X 0 ,...,X 127}, the A...

Embodiment 3

[0190] The scenario and sending and receiving process are the same as those in Embodiment 1, the difference is:

[0191] Suppose the size of the data to be transmitted is 80 bits, denoted as {x 0 ,...,x 79}, and set the modulation and coding method of the sent data to QPSK 5 / 6.

[0192] On the AP side (transmitter), the AP first sends the data to be transmitted {x 0 ,...,x 79} Input a BCC encoder with a coding rate of 1 / 2 to perform BCC, and obtain encoded bits {X 0 ,...,X 159}, namely the first data; copy the first data to get the first data {Y 0 ,...,Y 159}, here, {X 0 ,...,X 159} and {y 0 ,...,Y 159} are the same, except that different letters are used for symbol representation; then, in order to obtain a sequence with a transmission code rate of 5 / 6, the AP uses different puncturing modes to process the first data {X 0 ,...,X 159} and first data {y 0 ,...,Y 159} to punch holes. For the first data {X 0 ,...,X 159}, AP adopts Figure 12 The existing 5 / 6 tra...

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Abstract

The embodiment of the invention provides a data transmission method, device and system based on dual-carrier modulation (DCM). In the embodiment of the invention, when binary convolutional coding is adopted and the transmission code rate is greater than a half, first data obtained by binary convolutional coding is punched by adoption of different punching modes, namely a first punching mode and a second punching mode; missed bits of the first punching mode and the second punching mode on two same data are different; but, the transmission code rates of obtained punched data, namely first punched data and second punched data, are same; therefore, a receiving end can obtain the missed bits of another data from one data; the coding gain is obtained; furthermore, compared with the existing DCM technology, the data transmission bit error rate based on DCM can be reduced; and the data transmission reliability can be increased.

Description

technical field [0001] Embodiments of the present invention relate to communication technologies, and in particular to a data transmission method, device and system based on dual-carrier modulation. Background technique [0002] Orthogonal Frequency Division Multiplexing (hereinafter referred to as: OFDM) technology is widely used in today's wireless communication networks. Its core idea is to divide the wireless channel into several mutually orthogonal It is converted into multiple parallel data streams and modulated onto each subcarrier for transmission. The bandwidth of each subcarrier is very small, which can be approximated as flat fading, so that Inter-symbol Interference (Inter-symbol Interference, hereinafter referred to as: ISI) can be weakened, and the complexity of the equalization algorithm can be reduced. [0003] With the continuous development of wireless technology, the network is becoming more and more dense, and the interference between cells has gradually...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00H04L27/26
CPCH04L1/0059H04L27/2601H04L27/26
Inventor 向铮铮徐正勳陈特彦刘晟庞继勇朱俊
Owner HUAWEI TECH CO LTD
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