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:
Dec. 25, 2012
Filed:
Jan. 28, 2010
Gerogios Karagiannidis, Thessaloniki, GR;
Athanasios Lioumpas, Thessaloniki, GR;
Diomidis Michalopoulos, Thessaloniki, GR;
Gerogios Karagiannidis, Thessaloniki, GR;
Athanasios Lioumpas, Thessaloniki, GR;
Diomidis Michalopoulos, Thessaloniki, GR;
Aristotle University Thessaloniki—Research Committee, Thessaloniki, GR;
Abstract
Signals transmitting symbols through a multi-paths channel are received by a diversity receiver using at least two branches. The signals are combined after their processing in individual branches, minimizing combining loss of EGC receivers, minimizing BER and optimizing the performance. Processing in individual branches includes estimation of the phase changes induced by the channel at each received signal, with reference to the transmitted signal, and weighting of each signal by a co-phasing coefficient based on said estimation, so that all received signals are co-phased. An optimization step includes estimation of mean value and variance of signal to noise ratio (SNR) in each branch, using sampling techniques, and weighting the received signals by an optimization coefficient calculated from the mean value and variance. The process avoids expensive hardware for continuous estimation of instantaneous channel gains at each branch.