A time-domain super-Nyquist non-orthogonal transmission pilot design method
A pilot design, non-orthogonal technology, applied in the transmission system, digital transmission system, multiple use of transmission paths, etc., can solve the problem that the time-domain FTN non-orthogonal transmission cannot be directly expanded, and achieve the suppression of crosstalk between symbol blocks , the effect of suppressing crosstalk
Active Publication Date: 2018-03-23
SOUTH CHINA NORMAL UNIVERSITY
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Therefore, the traditional pilot design scheme under the Nyquist orthogonal transmission environment (including pilot pattern settings, such as comb and block pilots, and corresponding pilot parameter settings, such as pilot tone, power, phase etc.) will not be directly extended to time-domain FTN non-orthogonal transmission, and a new pilot design scheme is required
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[0024] see figure 1 , which is a flow chart of the steps of the pilot-related method of the present invention. The time domain super-Nyquist non-orthogonal transmission pilot design method of the present invention comprises the following steps:
[0025] Step S1: Before sending data, select two periods before and after the symbol block as Insert the data block before the symbol block behind the symbol block, and insert the data block after the symbol block before the symbol block. Among them, the cycle , the constant It is greater than the maximum path number L of symbol blocks in multipath fading channel transmission.
[0026] Step S2: When receiving data, the period before and after removing the symbol block is data block;
[0027] Step S3: perform truncated approximation on the symbol block;
[0028] Step S4: Analyze the mean square error to obtain the optimal pilot frequency. Specifically, in this embodiment, the mean square error of channel estimation is obtain...
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The present invention relates to a kind of non-orthogonal transmission pilot design method of super-Nyquist (FTN) in time domain, comprising the following steps: Step 1: before sending data, select two sections of period data blocks before and after the symbol block, and The data block located before the symbol block is inserted behind the symbol block, and the data block located behind the symbol block is inserted in front of the symbol block; Step 2: When receiving data, remove the data with a period of block; Step 3: perform truncated approximation on the symbol block; Step 4: analyze the mean square error to obtain the optimal pilot frequency. Compared with the prior art, the present invention can better suppress crosstalk between symbol blocks caused by FTN by adding a cyclic prefix (CP) of length L to the front and back of the symbol block, and reasonably setting the period of the CP.
Description
technical field [0001] The invention relates to a pilot frequency design method, in particular to a time domain super-Nyquist non-orthogonal transmission pilot frequency design method. Background technique [0002] In recent years, research on non-orthogonal transmission schemes based on Faster-than-Nyquist (FTN) rates has attracted widespread attention from scholars at home and abroad. Under the conditions of equal bandwidth, equal power and bit error rate, this scheme can provide a higher rate than traditional Nyquist orthogonal transmission. Compared with the traditional quadrature pulse or Nyquist linear modulation, the modulation pulse rate of the FTN scheme is faster, which means that more data will be transmitted in the time domain per unit time. Therefore, the FTN transmission scheme inevitably causes longer inter-symbol interference (Inter-symbol interference, ISI) while providing higher transmission efficiency, which makes the receiver have to use a more complex d...
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IPC IPC(8): H04L25/03H04L5/00
Inventor 张涵高山伍先达王雪飞
Owner SOUTH CHINA NORMAL UNIVERSITY