Method and apparatus for digital correlation in pseudorandom noise coded systems
US5646626A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 30, 1996 |
| Grant date | Jul 8, 1997 |
| Priority date | — |
| Expiry date | Jan 30, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S7/356
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A pseudorandom noise coded system (100) compensates for imperfections, improving out of range rejection, and includes a digital correlator (200) having a first complex multiplier (202) receiving a sequence of sampled data words and a sequence of precomputed complex data words and producing a sequence of first complex product words. A second complex multiplier (204) receives the sequence of first complex product words and a precomputed constant word and produces a sequence of second complex product words. A complex multiplexer (206) receives a sequence of binary code states, and the sequences of first and second complex product words and produces a sequence of complex multiplexer output words formed as a replica of either the first or the second complex product words, depending on the binary code. A complex accumulator (208) receives the sequence of complex multiplexer output words and produces a complex accumulated sum word formed as a complex sum of the complex multiplexer output words.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.