Meta-carrier embedding technique with improved performance for BPSK, MSK, and O-QPSK modulation
US8675751B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 26, 2011 |
| Grant date | Mar 18, 2014 |
| Priority date | — |
| Expiry date | Aug 21, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B2201/70716
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method of embedding information within a burst carrier signal, the method comprising modulating meta-data using a modulator such that a meta-carrier signal results, lowering a Power Spectral Density (PSD) of the meta-carrier signal by Direct Sequence Spread Spectrum (DSSS) chipping the meta-carrier signal using a linear Pseudo-Random Number (PRN) sequence, embedding one or more modulated symbols of the meta-carrier signal within an unused portion of one or more quadrants of a modulation constellation of a burst carrier signal such that a composite carrier signal results, and synchronously transmitting the composite carrier signal using a transmitter such that symbols of the meta-carrier signal are synchronized with symbols of the burst carrier signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.