MATRIX Software-Defined Radio
Multichannel Adaptive TRansceiver Information eXtractor (MATRIX) is a state-of-the-art, specialized software-defined radio (SDR). MATRIX treats all ambient signals in the environment, most of which are not intended as positioning or navigation sources, as potential signals of opportunity. Examples of these signals include audio (e.g., AM, FM), television (e.g., HDTV), cellular (e.g., CDMA, GSM, LTE), and satellite communication (e.g., Iridium). MATRIX continuously searches for opportune signals from which it draws navigation and timing information, employing signal characterization on-the-fly as necessary.
Our research in this thrust focuses on modeling signals of opportunity at a high level of granularity and designing appropriate MATRIX SDR modules for such signals, which are capable of producing accurate navigation observables.
- A joint TOA and DOA approach for positioning with LTE signals
- Pseudorange and multipath analysis of positioning with LTE secondary synchronization signals
- Exploiting LTE signals for navigation: theory to implementation
- Computationally efficient receiver design for mitigating multipath for positioning with LTE signals
- Ranging precision analysis of LTE signals
- Comparative results for positioning with secondary synchronization signal versus cell specific reference signal in LTE systems
- Performance characterization of positioning in LTE systems
- Navigation with cellular CDMA signals - Part II: performance analysis and experimental results
- Navigation with cellular CDMA signals - Part I: signal modeling and software-defined receiver design
- Evaluation of relative clock stability in cellular networks
- Characterization of sector clock biases in cellular CDMA systems
- A software-defined receiver architecture for cellular CDMA-based navigation