Spread spectrum communication device
US5291515A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 11, 1991 |
| Grant date | Mar 1, 1994 |
| Priority date | — |
| Expiry date | Jun 11, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04J13/0074
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
On the transmitter side, data to be transmitted are converted into a plurality of parallel data sets by a serial-parallel converter 101 and spread spectrum modulation is effected by means of PN code generators 105 and selectors 102. Each of the modulated outputs is delayed by a delaying circuit 103 with reference to a sounder channel and the phase thereof. The output thus delayed and the output of the sounder channel are added by an adder 104 to be multiplexed and transmitted. On the receiver side, correlation between a received signal and a reference signal is formed by a correlator 201 to obtain a correlation pulse from the correlation output thus obtained. Data demodulation is effected by means of a sounder detecting circuit 209, a sampling pulse generating circuit 210 and an information detecting circuit 211, starting from this correlation pulse. According to the structure described above, in SS communication, data demodulation can be effected with a high efficiency by using a single correlator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.