Multi-rate coexistence scheme in DSSS O-QPSK network
US8948230B1 · kind B1 · utility
3Cited by
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14Claims
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Key dates
| Filing date | Nov 28, 2013 |
| Grant date | Feb 3, 2015 |
| Priority date | — |
| Expiry date | Nov 28, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/2082
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
An IEEE 802.15.4 DSSS Offset-QPSK device is proposed that allows an existing system to transfer Offset-QPSK modulation signal into MSK modulation signal, then deliver the MSK modulation signal without DSSS to increase payload data transmission rate. On-the-fly detection of whether a low data rate or a high data rate encoding mode is used for a received frame is attained by the transmitter setting a predetermined bit in the frame length byte of a transmitting frame. Thus an extra high data rate transmission for IEEE 802.15.4 DSSS Offset-QPSK systems can be provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.