Methods and devices for estimating QAM symbol sequences over flat fading channels using multiple offset sequences
US6487254B1 · kind B1 · utility
2Cited by
5References
36Claims
0Family size
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Key dates
| Filing date | May 7, 1999 |
| Grant date | Nov 26, 2002 |
| Priority date | — |
| Expiry date | May 7, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/03178
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A sequence of Quadrature Amplitude Modulated (“QAM”) data symbols is received and its' fading process estimated. The estimated fading process is then used to generate estimates of the identity of the symbols themselves. Instead of using the single, received sequence to complete the fading process estimates, multiple offset sequences are used. For a given signal-to-noise ratio, the resulting fading process estimates and data symbol estimates provide for reduced bit error rates.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.