Data sending, receiving and transmission method, device and system

A technology for a data transmission system and a receiving end, applied in the field of communication, can solve the problem of not being able to use CPs of different lengths, and achieve the effect of avoiding inter-symbol interference

Active Publication Date: 2015-09-16
苏州医疗器械产业发展集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The main purpose of the present invention is to provide a method for sending, receiving and transmitting data, a transmitting end, a receiving end and a data transmission system, so as to at least solve the problem that users in the same cell in the above-mentioned system cannot use CPs of different lengths

Method used

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  • Data sending, receiving and transmission method, device and system
  • Data sending, receiving and transmission method, device and system
  • Data sending, receiving and transmission method, device and system

Examples

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Embodiment 1

[0029] figure 1 is a schematic structural diagram of a data transmission system according to Embodiment 1 of the present invention, such as figure 1 As shown, the system includes: multiple transmitting terminals 2 and one receiving terminal 4 . Wherein, each of the multiple transmitting ends 2 is respectively located in one user equipment, and in the embodiment of the present invention, the cycle lengths used by each user equipment may be different.

[0030] Wherein, each transmitting end 2 is used to map the user data information and pilot bit information to be transmitted to the frequency domain resources allocated for the transmitting end (that is, the user equipment where the transmitting end is located) according to the length of the cyclic prefix used by it. Above, obtain the frequency domain signal, and convert the frequency domain signal into a time domain signal, add CP to the time domain signal and send it; wherein, the transmitter 2 using the preset length CP conve...

Embodiment 2

[0037] figure 2 is a schematic structural diagram of the transmitting end 2 according to Embodiment 2 of the present invention, the transmitting end is located in the user equipment, such as figure 2 As shown, in the embodiment of the present invention, the transmitting end 2 may include: a pilot code generation module 20 , a user data generation module 22 , a resource mapping module 24 and a time domain signal generation module 26 . Among them, the pilot code generating module 20 is used to generate pilot bit information according to the resource length allocated for the transmitting end (that is, the user equipment where the transmitting end is located), and input it into the resource mapping module, for example, assigning the transmitting end The length of the resource is 2M, if the CP length used by the transmitting end is a preset length (that is, the transmitting end is the first type of transmitting end), the length of the pilot bit information generated by the pilot ...

Embodiment 3

[0042] image 3 It is a schematic structural diagram of the receiving end 4 according to the third embodiment of the present invention, and the receiving end can be used in cooperation with the transmitting end 2 of the second embodiment. like image 3 As shown, the receiving end mainly includes: a cyclic prefix removal module 40 , a time-frequency domain conversion module 42 and a frequency domain separation module 44 . Among them, the cyclic prefix removal module 40 is used to receive time-domain signals sent by multiple transmitting ends 2 through wireless channels, and remove the CP of a preset length from the time-domain signals; the time-frequency domain conversion module 42 is used to convert The time-domain signal with the CP removed is converted to the frequency domain and input to the frequency-domain separation module 44; the frequency-domain separation module 44 is used to extract the received transmission end 2 transmissions according to the frequency domain reso...

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Abstract

A method, an apparatus and a system for transmitting, receiving and delivering data are disclosed in the present invention. The method for transmitting data comprises: according to the used cyclic prefix (CP) length, each transmission end maps user data information and pilot bit information, which are to be transmitted, to the frequency domain resources assigned to it, and obtains a frequency domain signal; wherein, the transmission end using the CP with a preset length maps the user data information and the pilot information to the frequency domain resources continuously, and the transmission end using the CP with a non-preset length maps the user data information and the pilot information to the frequency domain resources discontinuously; each transmission end transforms the frequency domain signal into a time domain signal, and transmits the time domain signal after adding the CP to it; wherein, before adding the CP to the time domain signal, the transmission end using the CP with the non-preset length removes a part of the time domain signal, and the length and the location of the removed time domain signal correspond to the CP length used by the transmission end. With the present invention, the coexistence of users with different delays in the same sub-frame can be supported.

Description

technical field [0001] The present invention relates to the communication field, in particular, to a method for sending, receiving and transmitting data, a transmitting end, a receiving end and a data transmission system. Background technique [0002] The downlink of Long Term Evolution (referred to as LTE) adopts Orthogonal Frequency Division Multiplexing (referred to as OFDM) technology. OFDM has the characteristics of high spectrum utilization and anti-multipath interference. OFDM system It can effectively resist the influence brought by the wireless channel. The LTE uplink transmission scheme adopts a single-carrier frequency division multiple access system (SC-FDMA) with a cyclic prefix. , referred to as DFT) to obtain the frequency domain signal, and then insert zero symbols for spectrum shifting, and the shifted signal passes through IFFT (so, the SC-FDMA system is also called DFT-S-OFDM system), which can reduce the peak-average power of the transmitting terminal C...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L25/03H04L1/00
CPCH04L5/0048H04L5/0044H04L27/2607H04L5/0037
Inventor 李萍
Owner 苏州医疗器械产业发展集团有限公司
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