Transmission and reception of reference preamble signals in OFDMA or OFDM communication systems
US8116195B2 · kind B2 · utility
54Cited by
8References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 27, 2005 |
| Grant date | Feb 14, 2012 |
| Priority date | — |
| Expiry date | Aug 21, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/2656
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Techniques for generating preamble sequences for OFDM and OFDMA communication systems based on CAZAC sequences with desired properties of constant amplitudes (CA) and zero autocorrelation (ZAC). Such preamble sequences may be used for synchronization and identification of individual transmitters. For example, the OFDMA symbol is constructed using a CAZAC sequence in the frequency-domain and the resulting time-domain waveform is a near-CAZAC sequence.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.