Apparatus and method for modifying an M-sequence with arbitrary phase shift
US6816876B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 29, 2001 |
| Grant date | Nov 9, 2004 |
| Priority date | — |
| Expiry date | Sep 12, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2207/583
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An embodiment of the invention described in the specification and drawings is an apparatus and method of generating a phase-shifted maximum length pseudo-random noise (PN) sequence without resorting to complicated counters and clocking schemes. The apparatus includes a linear feedback shift register (LFSR) that has N stages and the ability to generate a first PN sequence at an output of its last stage. The LFSR is coupled to a first mask circuit and a second mask circuit for generating a second PN sequence and a third PN sequence. The apparatus further includes logic for selectively outputting bits from the second and third PN sequences to form a fourth PN sequence, which has a phase shift relative to the first PN sequence.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.