Non-coherent transmission and equalization in doubly-selective MIMO channels
US9088447B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 21, 2014 |
| Grant date | Jul 21, 2015 |
| Priority date | — |
| Expiry date | Mar 21, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2025/03426
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method and system realize reliable wireless communications in non-coherent multiple-input multiple-output (MIMO) doubly-selective channels. The method uses Grassmannian space-time-frequency block codes and an iterative generalized likelihood ratio test (GLRT) with a multi-dimensional basis expansion model (BEM), decision reordering, and a fixed number of surviving candidates. The computational complexity of a non-coherent MIMO equalizer becomes linear as a function of a code length and a size of a modulation alphabet. The codebook, the alphabet size, the bit labeling, and the block power are optimized using worst-case channel statistics or instantaneous channel states. The method can use soft-information feedback from error correction codes, such as low-density-parity-check codes to improve performance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.