System and method for joint MIMO transmission and compression for interference mitigation with cooperative relay
US9998190B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Sep 29, 2015 |
| Grant date | Jun 12, 2018 |
| Priority date | — |
| Expiry date | Mar 17, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W88/04
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
System and method embodiments are provided for interference mitigation and signal enhancement in downlink wireless communications for MIMO systems with device-to-device communications across cooperating user terminals. In an embodiment, a network controller initializes a transmit covariance for beam-forming a transmit signal of the MIMO transmission from a base-station to a destination terminal and a relay terminal, and initializes a quantization noise covariance used for compressing a relay signal from the relay terminal to the destination. The transmit covariance and the quantization noise covariance are initialized in accordance with known channel state information and with statistics of noise and interference for transmit and relay channels. The transmit covariance and the quantization noise covariance are then jointly optimized using an iterative algorithm in accordance with a capacity constraint on a relay link between the relay terminal and the destination terminal and a transmit signal power constraint of the base-station.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.