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. 18, 2001
Filed:
Aug. 28, 1998
Wen-Chang Lin, Hsinchu, TW;
Yu T. Su, Chi-Yi, TW;
Abstract
A method of acquiring a transmitted pseudo noise (PN) code c(t) from a received signal r(t) that is data modulated. The method includes, for a BPSK modulated signal, multiplying the received signal r(t) by cos(&ohgr;,t) and sin(&ohgr;,t), respectively to produce in-phase and quadrature (I-Q) down converted signals. Then multiplying the I-Q down converted signals by the PN code c(t), having a second PN code phase, to produce f(t) and g(t) respectively. Thereafter, summing separate contiguous portions of f(t) and g(t) and multiplying the summed portions of f(t) and g(t) by a matrix. The matrix represents data patterns within an interval MT,that spans the separate contiguous portions of f(t) and g(t). Lastly, the results of the matrix multiplication are compared to a threshold value to determine if the first PN code phase is equal to the second PN code phase.