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TDCS multiple access method based on interleave multiple access

A technology of interleaving multiple access and access methods, applied in the field of multi-user transform domain communication systems, can solve problems such as insufficient use of spectrum, and achieve the effects of improving multiple access capabilities and flexible data transmission

Active Publication Date: 2018-06-05
NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP +1
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Problems solved by technology

However, spectrum in most bands is underutilized

Method used

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  • TDCS multiple access method based on interleave multiple access
  • TDCS multiple access method based on interleave multiple access
  • TDCS multiple access method based on interleave multiple access

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Embodiment Construction

[0026] In order to facilitate those skilled in the art to understand the technical content of the present invention, the content of the present invention will be further explained below in conjunction with the accompanying drawings.

[0027] The block diagrams of the transmitter and receiver of traditional bipolar modulation TDCS are as follows: figure 1 , figure 2 shown. The transmitter mainly includes a spectrum sensing and judgment module, a pseudo-random sequence generation module, an amplitude adjustment module, an inverse Fourier transform module, and a data modulation module. The receiver mainly includes a spectrum sensing and judgment module, a pseudo-random sequence generation module, a Fourier transform module, and a correlation receiving module. Based on the traditional TDCS structure, the present invention realizes the purpose of distinguishing different users by allocating unique random interleavers to different users. The transmitter and receiver block diagra...

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Abstract

The invention provides a transform domain communication system (Transform Domain Communication System, TDCS) multiple access method based on interleave multiple access (Interleave-Division Multiple Access) so as to improve the multiple access capability. According to the method, based on a traditional bipolar modulation conversion domain communication system, bipolar modulation is carried out on the transmitted data by using a basic modulation waveform at a transmitting end; and then, the data of each user enters a unique code chip-level interleaver for interleaving; the interleaved data are subjected to fourier inverse transformation to generate a sending signal; at a receiving end, the received signals are demodulated and judged according to a traditional IDMA demodulation method. According to the method in the invention, the concept and architecture of interleaving multiple access are introduced; the multiple access capability can be effectively improved on the premise that the advantages of the TDCS system are kept.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a multi-user Transform Domain Communication System (TDCS, Transform Domain Communication System) and an implementation method thereof. Background technique [0002] With the rapid growth of the new generation of wireless communication traffic, the problem of shortage of spectrum resources is becoming more and more serious, especially in the wireless frequency band below 6 GHz where the frequency demand is very tight. However, the spectrum in most bands is underutilized. Some unlicensed bands are crowded, while others are often vacant. The transform domain communication system provides a new idea for rational utilization of spectrum resources. [0003] In the transform domain communication system, in order to make full use of idle spectrum resources, the TDCS system decomposes the idle frequency band into a series of independent spectrums, and combines...

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Application Information

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IPC IPC(8): H04L5/00H04L1/00H04W72/04
CPCH04L1/0071H04L5/001H04L5/0098H04W72/0453
Inventor 王荆宁李帆胡苏雷霞
Owner NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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