System and method for modulating a signal at an antenna
US8340197B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 25, 2008 |
| Grant date | Dec 25, 2012 |
| Priority date | — |
| Expiry date | Oct 13, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/20
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A Direct Spatial Antenna Modulation (DSAM) antenna structure makes use of the instantaneous electromagnetic field state of a radiating antenna structure to achieve direct modulation of a transmitted signal within the antenna. In contrast to existing amplitude and phase-only based digital modulation techniques, this innovative technique utilizes an inherent spatial modulation component, mapping data spatially to different locations in the antenna structure, where each location has different transmitting and receiving properties. This spatial component of the modulation can enable, for example, a unique increase in data transmission speed in a fixed spectral bandwidth with no increase in bit error rate over current phase and amplitude only modulation techniques. Additionally, the DSAM antenna structure affords important benefits in reduced hardware complexity, reduced supply current consumption, and relaxed amplifier linearity requirements. This abstract is not to be considered limiting, since other embodiments may deviate from the features described in this Abstract.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.