The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 27, 2015
Filed:
Nov. 01, 2010
Jing Xu, Beijing, CN;
Deshan Miao, Beijing, CN;
Shaohui Sun, Beijing, CN;
Yu Ding, Beijing, CN;
Guojun Xiao, Beijing, CN;
Jun Chen, Beijing, CN;
Jing Xu, Beijing, CN;
Deshan Miao, Beijing, CN;
Shaohui Sun, Beijing, CN;
Yu Ding, Beijing, CN;
Guojun Xiao, Beijing, CN;
Jun Chen, Beijing, CN;
CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY, Beijing, CN;
Abstract
A method, apparatus and system for downlink pilot transmission solve the problem of power differences among OFDM symbols caused by Walsh Codes. The transmission method is that dedicated pilots are transmitted in the manner of code division multiplexing (CDM) or hybrid of CDM and frequency division multiplexing (FDM), wherein the dedicated pilots are configured with orthogonal sequence sets according to a preset frequency-domain granularity and rules on the resources for transmitting the dedicated pilots, and the same orthogonal sequence set is employed for the dedicated pilots in each frequency-domain granularity.