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. 19, 2008
Filed:
Jun. 23, 2004
David E. Orr, Vancouver, WA (US);
David E. Orr, Vancouver, WA (US);
Xtendwave, Inc., Dallas, TX (US);
Abstract
A method for encoding, transmitting, and receiving signals utilizes adaptive wavelet packet trees. A transmitter accepts a binary data stream assumed to be random. At the transmitter the data is parsed from a serial bit stream into several parallel streams. Within each of the parallel bit streams symbols are formed from the bits. Signals are created from each symbol by up-sampling. These signals modulate low-pass and high-pass filters that are derived from a wavelet packet transform (the wavelet and scaling functions, or, equivalently the low-pass and high-pass analysis filters). The filters are paired—one high-pass with one low-pass. The steps recited above are recursively repeated logN times for a signal of length N. The resulting signal is transmitted to the receiver. At the receiver, the steps recited above are reversed at the receiver to recover symbols, with the up-sampled signal down-sampled to remove inserted zeroes.