Process for decoding ALAMOUTI block code in an OFDM system, and receiver for the same
US8842755B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 25, 2010 |
| Grant date | Sep 23, 2014 |
| Priority date | — |
| Expiry date | Jan 2, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L5/0007
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A process for decoding a signal being representative of a Space Time or Frequency Block coding during two signaling periods (STBC) or two parallel channels (SFBC) is provided. The process receives an OFDM signal received from at least one antenna. The process also performs an OFDM demodulation in order to generate N frequency domain representations of the received signal. Then the process performs a decoding process on said OFDM demodulated signal and groups the received signal in word code, Y=(y1, y2), to represent the signal that was received during two signaling periods (STBC) or two parallel channels (SFBC). The word code is then decoded into a matrix after which a lattice reduction algorithm is applied to the matrix in order to transform the matrix into a reduced matrix having a near orthogonal vector. Then it performs a detection process on the reduced matrix to improve noise and interference immunity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.