Pilot signal in an FDMA communication system
US8000228B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 24, 2010 |
| Grant date | Aug 16, 2011 |
| Priority date | — |
| Expiry date | Aug 24, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/2672
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Methods (500, 800) and corresponding systems (100, 200, 300, 400, 900) for generating a pilot symbol (330) include providing an M-point parallel transform sequence that is a discrete Fourier transform of a CAZAC sequence (312, 504-508). The M-point parallel transform sequence (312) is distributed (316, 510) to a set of M subcarriers among N subcarriers to form an N-point frequency-domain sequence (318) wherein the M subcarriers are evenly spaced apart. An N-point inverse fast Fourier transform (320, 512) is performed to convert the N-point frequency-domain sequence to an N-point time-domain sequence (322). The N-point time-domain sequence is converted (324, 514) to a serial sequence (326), and a cyclic prefix is added (328, 516) to the serial sequence to form a pilot symbol (330).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.