Method and apparatus for performing digital communicatons

一种信号、码字的技术，应用在多路复用通信、数字传输系统、正交多路复用系统等方向，能够解决降低系统性能、突发错误等问题

Inactive Publication Date: 2004-05-19
SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Also, if the side information has errors during transmission, it can cause burst errors, thus greatly degrading the performance of the system

Method used

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  • Method and apparatus for performing digital communicatons
  • Method and apparatus for performing digital communicatons
  • Method and apparatus for performing digital communicatons

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Embodiment Construction

[0054] Now, a technique for reducing PAPR according to the present invention will be described in detail with reference to FIGS. 3 , 4A, and 4B.

[0055] Fig. 3 is a table illustrating a standard matrix of an (n, k) block code according to the present invention. Here, c i A vector has length n. First, the standard matrix of the linear block code based method for reducing PAPR according to the present invention will be described in detail.

[0056] If the noise on the channel is denoted by e when sending a codeword c of a (n,k) linear block code, the received vector is defined as r=c+e or r i = c i +e i , where i=1, 2, . . . , n. If H is a (n-k)×n supervision matrix, then Hc t =0, where t is the transpose matrix. The syndrome s of the received vector r is defined as follows.

[0057] [Equation 8]

[0058] s=(s 1 ,s 2 ,...,s n-k ) t =Hr t

[0059] =H(c+e) t =Hc t +He t

[0060] =He t

[0061] The syndrome is affected by errors induced on the channel rather t...

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Abstract

A wired and wireless communication method and apparatus for reducing a PAPR Peak to Average Power Ratio in an OFDM Orthogonal Frequency Division Multiplexing system. A transmitter of the OFDM system designates, as a coset leader, a vector capable of minimizing a PAPR in a general standard array of n, k linear block codes and transmits a sequence having a minimum PAPR by adding each coset leader to an n-bit codeword corresponding to k-bit information and producing U<=2n-k number of vectors. Then, a receiver of the OFDM system can easily recover an original transmission signal using a syndrome of a received vector if the receiver identifies information of the syndrome and the coset leader.

Description

technical field [0001] The present invention relates to a wired or wireless communication method, in particular to a method and device for reducing PAPR (peak to average power ratio) in an OFDM (orthogonal frequency division multiplexing) system. Background technique [0002] In a general parallel data processing system, the overall signal frequency band is divided into N frequency sub-channels that do not overlap each other. Each symbol is modulated by subchannels, and frequency division multiplexing is applied to N subchannels. [0003] FIG. 1 is a view illustrating a configuration of conventional OFDM (Orthogonal Frequency Division Multiplexing). Referring to Fig. 1, a conventional OFDM system utilizes DFT (Discrete Fourier Transform) to modulate and demodulate parallel data. [0004] Hereinafter, the operation of a conventional OFDM system will be described with reference to FIG. 1 . First, if a serial data stream of a predetermined size (eg, X bits) is input to the d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J11/00H04L27/26H04L27/34
CPCH04L27/2617H04L27/3411H04L27/2614H04J11/00
Inventor 孙廷旼
Owner SAMSUNG ELECTRONICS CO LTD
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