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Method and device for improving selective mapping of phase sequences by using superimposed training sequences

A technology of training sequences and mapping methods, applied in multi-frequency code systems and other directions, can solve the problems of reduced performance and high system computational complexity, and achieve the effect of reducing the peak-to-average power ratio

Inactive Publication Date: 2010-11-10
UNIV OF ELECTRONICS SCI & TECH OF CHINA ZHONGSHAN INST
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Problems solved by technology

It has good PAPR reduction performance for signal scrambling technology, but it obtains good PAPR performance at the cost of higher system computational complexity

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  • Method and device for improving selective mapping of phase sequences by using superimposed training sequences
  • Method and device for improving selective mapping of phase sequences by using superimposed training sequences
  • Method and device for improving selective mapping of phase sequences by using superimposed training sequences

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Embodiment Construction

[0017] The main realization principles, specific implementation methods, etc. of the technical solution of the present invention will be described in detail below with reference to the accompanying drawings.

[0018] Please refer to figure 2 , this figure is a flow chart of the main implementation principle of processing the transmitted signal by using the superposition training sequence selective mapping method proposed by the present invention, and its main implementation process is as follows: Step A1, the sending end performs serial parallel processing on the input signal sequence; Step A2 , for the parallel transmission signal sequence after serial-to-parallel conversion, select part of the signal sequence for the following steps: step T1, superimpose the training sequence r [N] Superimpose on the selected part of the signal sequence according to a certain power distribution factor b; step T2, wherein the setting of the power ratio factor b of the superimposed training s...

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Abstract

The invention discloses a method for improving selective mapping and a device for improving the selective mapping of phase sequences by using superimposed training sequences. The method comprises the following steps of: performing serial / parallel conversion on input signal sequences by a sending terminal and extracting partial parallel signal sequences from the converted signal sequences for execution; adding the parallel signal sequences to the superimposed training sequences in a one-to-one manner in consideration of power distribution; processing the addition result and the remaining parallel signal sequences after the extraction in parallel; multiplying all the parallel signals with an element corresponding to a sequence in an N-cluster phase sequence group and performing Fast Fourier Transform on the multiplied result; computing the corresponding own peak-to-average power ratio (PAPR) by the sending terminal, and selecting the phase sequence as the relatively optimum phase sequence, namely, suboptimum phase sequence once the PAPR is less than or equal to the preset threshold, or selecting the phase sequence corresponding to the minimum PAPR as the suboptimum phase sequence; and finally, using the parallel signal corresponding to the minimum PAPR in the suboptimum phase sequence as the result and sending the result.

Description

technical field [0001] The present invention relates to the technical field of improving OFDM signals in an Orthogonal Frequency Division Multiplexing (OFDM) mobile communication system, in particular to a selective mapping method and device for improving phase sequences using superimposed training sequences . Background technique [0002] Because Orthogonal Frequency Division Multiplexing (OFDM) system has the characteristics of high spectrum efficiency and strong anti-multipath fading ability, it has been widely used in mobile communication systems. However, an inherent disadvantage of OFDM signals is the high peak-to-average power ratio (Peak-to-Average Power Ratio, PAPR), which requires the power amplifier of the transmitter in the mobile communication system to have a large dynamic range, otherwise it will produce Linear distortion, thereby affecting OFDM system performance, will also increase the equipment cost of the transmitter. [0003] In the existing OFDM system...

Claims

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Application Information

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IPC IPC(8): H04L27/26
Inventor 罗仁泽伍晓琼刘盈黄家盛高頔
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA ZHONGSHAN INST
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