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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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  • Description
  • Claims
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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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