Recherche dans les collections de brevets nationales et internationales
Certains contenus de cette application ne sont pas disponibles pour le moment.
Si cette situation persiste, veuillez nous contacter àObservations et contact
1. (CN107046514) Generating method of frequency domain OFDM symbol

Office : Chine
Numéro de la demande : 201611079633.1 Date de la demande : 05.05.2014
Numéro de publication : 107046514 Date de publication : 15.08.2017
Type de publication : A
CIB :
H04L 27/26
H ÉLECTRICITÉ
04
TECHNIQUE DE LA COMMUNICATION ÉLECTRIQUE
L
TRANSMISSION D'INFORMATION NUMÉRIQUE, p.ex. COMMUNICATION TÉLÉGRAPHIQUE
27
Systèmes à porteuse modulée
26
Systèmes utilisant des codes à fréquences multiples
Déposants : SHANGHAI NATIONAL ENGINEERING RESEARCH CENTER OF DIGITAL TELEVISION CO., LTD.
Inventeurs : ZHANG WENJUN
XU HONGLIANG
HUANG GE
Données relatives à la priorité : 2014101829623 30.04.2014 CN
Titre : (EN) Generating method of frequency domain OFDM symbol
(ZH) 频域OFDM符号的生成方法
Abrégé : front page image
(EN) The invention discloses a generating method of a frequency domain OFDM symbol. The generating method of the frequency domain OFDM comprises the following steps: respectively generating fixed sequences and signaling sequences on a frequency domain; filling the fixed sequences and the signaling sequences to an effective subcarrier, wherein the fixed sequences and the signaling sequences are in odd-even stagger arrangement; respectively filing zero sequence sub-carriers at two sides of the effective sub-carrier so as to form a frequency domain OFDM system with a predetermined length, wherein CAZAC sequences are generated through a predetermined sequence generating rule; performing cyclic shift on each CAZAC sequence, selecting the signaling sequence from all CAZAC sequences according to the determined number of the signaling sequence; a condition that the produced signaling sequence has cyclic shift or cyclic shift and phase shift characteristics in the time domain is avoided, and a problem that the estimation performance of the frequency domain channel is reduced is solved; furthermore, the situation that a receiving end further can process the receiving signal when the carrier frequency deviation is in the range of -500kHz to 500kHz is guaranteed.
(ZH) 本发明公开了一种频域OFDM符号的生成方法,其中,频域OFDM符号的生成方法包括:在频域上分别生成固定序列和信令序列;将固定序列和信令序列填充至有效子载波上,且所述固定序列和信令序列之间呈奇偶交错排列;在所述有效子载波两侧分别填充零序列子载波以形成预定长度的频域OFDM符号,其中,由预定序列生成规则生成CAZAC序列,对该CAZAC序列经过循环移位,根据所确定的信令序列的个数从所有的CAZAC序列中选取所述信令序列,避免了产生的信令序列在时域有循环移位或者循环移位加相移的特性,并且解决了频域信道估计性能下降的问题,进一步地,保证了载波频率偏差在‑500kHz至500kHz范围内接收端仍可以处理接收信号。
Également publié sous:
CN106992951