Method, apparatuses and system for asynchronous spread-spectrum communication
| 542 - Abstract of the offer: |
| The European Space Agency (ESA) has developed means to perform asynchronous spread-spectrum communication. This technology can be used for a wide range of communication systems such as: mobile broadband data services, public safety, emergency alerting, traffic monitoring, environmental monitoring, vehicle information or location-awareness services. Licence agreement collaboration is sought. |
Description of the offer:
The offered technology includes the method, several apparatuses and a system for asynchronous spread-spectrum communication.
The developed method of receiving data packets asynchronously transmitted by a plurality of user terminals is characterized by including a step for cancelling interferences:
- Storing received signal samples in a processing memory
- Performing packet identification on the signals stored in the processing memory within a sliding processing window
- Selecting one among the identified packets, and cancelling the interference of the packet with the other received data inside the sliding processing window
- Repeating step c) for all or part of the packets identified at step b)
- Shifting the processing window by a shifting step which is shorter than the overall length of said processing window
Part of the technology is a gateway receiver for receiving data packets asynchronously transmitted by a plurality of user terminals, comprising:
- A front-end unit for demodulating and digitising the received signals
- A data processing unit for performing spread-spectrum demodulation, decoding and interference cancellation
Innovations and advantages:
The developed technology provides a way to very efficiently and reliably transmit small size data packets with low duty cycle in quasi real-time, thereby supporting a large user community of low-cost fixed and mobile terminals, minimising the associated signaling overhead and reusing as much as possible existing waveform standards for mass-market applications.
Domain of application:
This technology has a wide domain of application; in particular, the proposed communication technique has a high potential in applications for L/S-bands such as:
- Vehicle telemetry services (road tax, insurance, road assistance)
- Data services
- Mobile satellite two-way communication
- Mobile broadband
- Public safety and first-responder services
- Issue of distress beacons in the event of an accident
- Emergency alerting
- Monitoring of traffic flows
- Environmental monitoring
- Combination with GNSS applications
- Location-aware services
- Delivering of real time information on the road traffic
- Automatic paying of highway or city toll
- Telephone interconnect and other equipment
- Mobile communications, pagers and cellular radio
