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Transmitter, receiver and data transmission method

A transmitter and receiver technology, applied in the field of communication, can solve problems such as multi-user signal interference, and achieve the effect of solving multiple access interference

Active Publication Date: 2021-08-13
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Embodiments of the present invention provide a transmitter, a receiver, and a data transmission method to solve the problem of mutual interference between multi-user signals

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  • Transmitter, receiver and data transmission method
  • Transmitter, receiver and data transmission method
  • Transmitter, receiver and data transmission method

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Embodiment Construction

[0156] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. 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.

[0157] figure 1 It is a schematic diagram of the application scene of the present invention, such as figure 1 As shown, the application scenario of the embodiment of the present invention may specifically be a CDMA system accessed by multiple users, and multiple users access the CDMA system through the transmitter of the embodiment of the present...

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Abstract

Embodiments of the present invention provide a transmitter, a receiver and a data transmission method. The transmitter of the present invention includes: a time-frequency conversion module for performing time-frequency conversion on the original spreading code to obtain the original spreading code in the frequency domain; a frequency-domain cyclic prefix insertion module for inserting the frequency-domain cyclic prefix Into the original spread spectrum code of frequency domain, obtain the first spread spectrum code of frequency domain; ; An output module, configured to obtain an output signal according to the first spreading code in the time domain and the baseband digital signal, and send the output signal to the receiver. The embodiments of the present invention can realize compensation of relative frequency offsets of multiple users, and effectively solve the problem of multiple access interference among multiple users.

Description

technical field [0001] The embodiments of the present invention relate to communication technology, and in particular to a transmitter, a receiver and a data transmission method. Background technique [0002] Code Division Multiple Access (CDMA for short) is a multi-point-to-point communication technology developed on the spread spectrum communication technology. The principle of CDMA technology is based on spread spectrum technology, that is, the information data with a certain signal bandwidth to be transmitted is modulated with a high-speed spread spectrum code whose bandwidth is much larger than the signal bandwidth, so that the bandwidth of the original data signal is expanded, and then modulated by the carrier and combined with send it out. The receiving end uses exactly the same spread spectrum code to perform correlation processing with the received broadband signal, and convert the broadband signal into a narrowband signal of the original data signal, that is, desp...

Claims

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Application Information

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IPC IPC(8): H04L27/26
CPCH04L27/26H04B1/707
Inventor 黄远达王勰李良川
Owner HUAWEI TECH CO LTD