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Transmission method of multi-carrier data

A data transmission method and multi-carrier technology, applied in the field of multi-carrier technology, can solve the problems such as the spectrum utilization rate cannot reach 1, the efficiency is low, and the peak average power is high.

Active Publication Date: 2013-08-21
董红飞
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is, its spectrum utilization rate cannot reach 1, and the efficiency is low compared with the required number of subcarriers according to the spectrum utilization rate, and the number of subcarriers is large and the peak average power is relatively large during parallel transmission.

Method used

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  • Transmission method of multi-carrier data

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Embodiment Construction

[0031] The lower delay Fourier series and the fractional code rate orthogonal function to be used in the invention of this technology are special types of orthogonal functions created and constructed by the inventor of the technology according to the method of constructing an orthogonal function. Now it is described as follows.

[0032] Use the following notation. represents the set of complex numbers, is the set of real numbers, is the set of natural numbers. The normed linear space formed by all absolute square integrable functions f(t) on the real number interval [-T / 2, T / 2] is denoted as or L 2 [-T / 2, T / 2]f(t) is a real-valued or complex-valued function is not difficult to distinguish according to the context, The inner product and norm defined above are

[0033] ∀ f , g ∈ L T 2 ; Inner product f ...

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Abstract

Provided is a transmission method of multi-carrier data. According to the transmission method, data are transmitted by means of at least two sub carriers and at least two component channels. The transmission method of the multi-carrier data is characterized in that each component channel for transmitting data comprises multilevel and multi-rate sub carriers which contain harmonic wave deviation modulation sub carriers. Carriers in the same layer are orthogonal in time domain, the spectrum of one sub carrier is overlapped with the spectrum of another sub carrier in the same layer, and the two sub carriers can not be isolated with a segmentation frequency spectrum and by a filter. Signals are combined in a multiply method through the sub carriers which are overlapped in spectrums in the same layer and the sub carriers which are overlapped in spectrums in an adjacent layer, orthogonal component channels or approximate orthogonal component channels can be distinguished through related demodulation, and the number of the component channels is the product of the number of sub carriers in each layer. The transmission method of the multi-carrier data is further characterized in that by means of the Fourier series and a fraction code rate orthogonal function, the number of the component channels with preset bandwidth and time width is increased, new component channels are added on the basis of the existing component channels, and similar performance is achieved with a smaller peak-to-average power ratio compared with the prior art.

Description

technical field [0001] The invention relates to multi-carrier technology in communication technology, and is a multi-carrier data transmission method, which uses at least two sub-carriers and sub-channels to transmit data. The sub-channel used to transmit data is composed of multi-level and multi-code-rate sub-carrier combinations including harmonic shift modulation sub-carriers. Background technique [0002] In the field of communication technology, the origin of multi-carrier technology can be traced back at least to the 1950s and 1960s, and the theoretical discussion can be traced back to an earlier period. OFDM technology is a typical multi-carrier technology. Since 1971, the OFDM system was proposed. The implementation methods of Fourier transform (FFT) and inverse transform (IFFT) have been developed rapidly since then, and have been widely used in the field of communication technology today. [0003] The main point of OFDM system data transmission is to divide the ch...

Claims

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Application Information

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IPC IPC(8): H04L5/00H04L27/26
Inventor 董红飞
Owner 董红飞
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