Spread spectrum signal receiving apparatus
US5222099A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 16, 1992 |
| Grant date | Jun 22, 1993 |
| Priority date | — |
| Expiry date | Jan 16, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S19/30
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A spread spectrum signal receiving apparatus comprising: a radio frequency processing circuit for converting a spread spectrum signal into an intermediate frequency signal; a binary encoder for encoding the intermediate frequency signal; a pseudo-random noise code generator; a code driver for controlling the phase and the chip speed of the output of the code generator; a first multiplier for multiplying the binary signal by the output of the code generator; a numerical controlled oscillator for outputting first and second carrier signals; second and third multipliers for multiplying the output signal of the first multiplier respectively by the first and second carrier signals; first and second low-pass filters supplied with the output signals of the second and third multipliers respectively; and a microcomputer having functions to produce signals for controlling the numerical controlled oscillator, and functions to produce signals for controlling the code driver.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.