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Generation method and device of quasi perfect period 16 QAM sequence

A sequential and perfect technology, applied in the field of mobile communication, can solve problems such as inability to generate

Inactive Publication Date: 2014-03-26
CHONGQING WIRELESS OASIS COMM TECHCO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, neither of the above two methods can produce a quasi-perfect M 2 -QAM sequence

Method used

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  • Generation method and device of quasi perfect period 16 QAM sequence
  • Generation method and device of quasi perfect period 16 QAM sequence
  • Generation method and device of quasi perfect period 16 QAM sequence

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Experimental program
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Embodiment Construction

[0036] figure 1 shows the basic structure of the invented quasi-perfect periodic 16QAM sequence generation device, such as figure 1 Shown, the generation device of quasi-perfect period 16QAM sequence of the present invention comprises:

[0037] A four-phase perfect sequence selection unit is used to select a four-phase perfect sequence;

[0038] A cyclic shift register, which performs cyclic shift processing on the four-phase perfect sequence to obtain a shifted equivalent sequence;

[0039] The first mapper performs mapping processing on the shifted equivalent sequence to obtain the first sequence;

[0040] The second mapper performs mapping processing on the four-phase perfect sequence to obtain the second sequence;

[0041] a four arithmetic processing unit, which respectively performs four arithmetic operations on the first sequence and the second sequence to obtain a third sequence and a fourth sequence;

[0042] The interleaver performs interleaving processing on the...

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Abstract

The invention discloses a generation method and a device of a quasi perfect period 16 QAM (Quadrature Amplitude Modulation) sequence. The device comprises: a four-phase perfect sequence selecting unit for selecting a four-phase perfect sequence; a cyclical shift register for processing the four-phase perfect sequence with cyclical shifting to obtain a shift equivalent sequence; a first mapper for mapping the shift equivalent sequence to obtain a first sequence; a second mapper for mapping the four-phase perfect sequence to get a third sequence and a fourth sequence; and an interleaver for interleaving the third sequence and the fourth sequence to get the quasi perfect period 16 QAM sequence. Non-zero self-correlation sidelobes of period self-correlation of the quasi perfect period 16 QAM sequence are four or two pure imaginary numbers, and positions where the non-zero self-correlation sidelobes can be predetermined and are variable within certain range.

Description

technical field [0001] The invention relates to the technical field of mobile communication, in particular to a method and a device for generating a quasi-perfect periodic 16QAM sequence. Background technique [0002] The fourth-generation mobile communication is developing rapidly towards high transmission rate, high transmission reliability, high spectral efficiency, large capacity and multimedia services. There are many technical problems to be overcome, one of which is how to efficiently increase the system transmission rate. Among the many alternatives, using M 2 -The method of transmitting information by QAM constellation has been highly valued by people, and the research shows that: under the same spread spectrum sequence length, M 2 -The spread spectrum sequence on the QAM constellation is several times higher than the traditional spread spectrum sequence transmission data bits (M.Anand and P.V.Kumar.Low-correlation sequences over the QAM constellation, IEEE Trans.o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/34
Inventor 曾凡鑫
Owner CHONGQING WIRELESS OASIS COMM TECHCO