Direct sequence spread spectrum system
US5661750A · kind A · utility
59Cited by
8References
37Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 6, 1995 |
| Grant date | Aug 26, 1997 |
| Priority date | — |
| Expiry date | Jun 6, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/707
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A direct-sequence spread spectrum communication system using a high power transmitter and a short spreading sequence which still satisfies FCC Rule 15.247 regarding power density. In addition to the spreading sequence, the carrier signal is modulated with a phase reversal sequence. Typically, each period of the phase reversal sequence has a duration equal to the total duration of the spreading sequence. The phase reversal sequence reduces the maximum power density of the signal, but is transparent to a receiver.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.