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:
Feb. 10, 2015
Filed:
Nov. 02, 2012
Applicant:
Nec Laboratories America, Inc., Princeton, NJ (US);
Inventors:
Shaoliang Zhang, Princeton, NJ (US);
Dayou Qian, Princeton, NJ (US);
Junqiang Hu, Princeton, NJ (US);
Lei Xu, Princeton, NJ (US);
Ting Wang, Princeton, NJ (US);
Assignee:
NEC Laboratories America, Inc., Princeton, NJ (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04J 14/06 (2006.01); H04B 10/04 (2006.01); H04B 10/12 (2006.01); H04B 10/50 (2013.01);
U.S. Cl.
CPC ...
H04J 14/06 (2013.01); H04B 10/5055 (2013.01);
Abstract
Disclosed are universal QPSK transmitter structures and methods for generating different QPSK signals exhibiting different polarization schemes, namely PolMux, PolMod and PolSw. The bit rate of the generated signals is variable, thereby allowing the transmitter to adjust to varying network traffic conditions. Advantageously, the generated signals may be detected by analog receivers (PolSw-QPSK) and coherent receivers (PolMux-QPSK, PolMod-QPSK, and PolSw-QPSK).