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. 12, 2008
Filed:
Jun. 13, 2003
Philippe Leclair, Verrieres le Buisson, FR;
Philippe Leclair, Verrieres le Buisson, FR;
Comsis, Paris, FR;
Abstract
An iterative method and a decoder for decoding space-time codes in a communication system with multiple transmission and reception antennae, strikes a compromise between techniques based on interference cancellation algorithms such as BLAST, which show faulty performance concerning error rate based on signal-to-noise ratio and techniques based on maximum likelihood algorithms which are optimal in terms of performance, but highly complex in implantation such as the sphere decoder. Therefor the method includes using a first matrix product between the received signal (Y) and a shaping matrix (B), and a second matrix product between a subtraction matrix (D) and the vector of the estimated symbols (S) during the preceding iteration. The estimated symbols during the current iteration are generated by a subtractor () receiving the results (rz) of the two matrix products. The role of the matrix Dis to subtract from the current information symbol Sthe interference caused by the other information symbols.