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Signal transmission and reception method capable of performing combined suppressing on peak-to-average power ratio and out-of-band power based on mixed carrier system

A hybrid carrier system, peak-to-average power ratio technology, applied in the field of communications

Active Publication Date: 2015-08-12
HARBIN INST OF TECH
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  • Abstract
  • Description
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Problems solved by technology

[0008] Document 3 proposes a windowing method for multi-carrier systems, but this method needs to be compensated at the receiving end

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  • Signal transmission and reception method capable of performing combined suppressing on peak-to-average power ratio and out-of-band power based on mixed carrier system
  • Signal transmission and reception method capable of performing combined suppressing on peak-to-average power ratio and out-of-band power based on mixed carrier system
  • Signal transmission and reception method capable of performing combined suppressing on peak-to-average power ratio and out-of-band power based on mixed carrier system

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specific Embodiment approach 1

[0043] Specific implementation mode 1. Combination figure 1 Describe this specific implementation mode, based on the joint suppression method of peak-to-average power ratio and out-of-band power of the mixed carrier system, its specific implementation steps are as follows:

[0044] Step 1: In the fractional domain, the QPSK modulated signal X=(X 1 ,X 2 …X M )X undergoes -α-order weighted fractional Fourier transform to the frequency domain, D=W -α X, D = (D 1 ,D 2 …D M ), firstly carry out frequency domain mapping in the frequency domain, allocate bandwidth for the different needs of different users, and utilize WFRFT transformations of different orders. In this patent, the user is set as a single user for the convenience of calculation;

[0045] Step 2: After the frequency domain mapping, copy the frequency domain data symbols, copy the Mβ / 2 data behind the data to the data front end, copy the Mβ / 2 symbols in front of the data to the data back end, and the frequency dom...

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Abstract

The invention relates to the field of communication, and provides a signal transmission and reception method capable of performing combined suppressing on a peak-to-average power ratio and out-of-band power based on a mixed carrier system. An object of the invention is to achieve combined suppressing on the peak-to-average power ratio and the out-of-band interference based on the mixed carrier system. The key points of the invention are that: 1. in a 4-WFRFT based mixed carrier wireless communication system, a time- and frequency-domain combined technique, in which time-domain windowing and frequency-domain shaping are combined, is used to simultaneously suppress the peak-to-average power ratio and the out-of-band power; 2. a windowing mode which does not influence the error rate is used for the time domain; and 3. in a mixed carrier mechanism, a method of analyzing the peak-to-average power ratio and the out-of-band power in a time- and frequency-domain combined manner is used. The signal transmission and reception method provided by the invention is applicable to transmission terminals and reception terminals of the 4-WFRFT based mixed carrier wireless communication system.

Description

technical field [0001] The invention relates to the communication field, in particular to a combined suppression technology based on peak-to-average power ratio and out-of-band power of a mixed carrier system. Background technique [0002] Traditional multi-carrier systems, such as OFDM systems, are extremely susceptible to the impact of the peak-to-average power ratio. At the same time, the OFDM system adds a rectangular window in the time domain. In the frequency domain, due to the slow attenuation of the sinc function, it will cause a large Out-of-band power radiation. Therefore, the peak-to-average power ratio and out-of-band radiation will have a great impact on the performance of the OFDM system. At present, there are many methods to suppress the peak-to-average power ratio of the multi-carrier system, such as peak clipping, phase selection and pulse shaping, etc., to suppress the multi-carrier system. The methods of out-of-band power include windowing in time domain,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26
CPCH04L27/2614
Inventor 梅林王震铎王晓鲁沙学军张乃通
Owner HARBIN INST OF TECH
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