WP2: Antenna design and RF architecture
The goal of this work package is to design a 60GHz RF front-end allowing digital and/or analog beamforming (figure 1) with the following specifications:
- Input frequency: 57GHz-60GHz
- Output frequency: 0GHz- 12GHz
- Bandwidth: 2GHz
- Angular scan: 90° (±45°)
- Beamwidth: 10°
- Side lobes level: <-13dB
- Polarisation: linear
- Simultaneous acquisition: 8 RX parallel in a plane
Two applications are focused:
- The first is for channel sounding at 60GHz in quasi 3D (360° in the azimuthal plane and 90° in the elevation plane). The system will be interconnected with a channel sounder in FI (FrequencyIntermediary) band
- The second application is for a proof of concept of a simultaneous 60GHz communication in a context of multi-users. The system will be integrated in the B-COM plateform presented in the WP5
Constraints:
- Compact system
- Interconnection to classic channel sounder or vector analyser network (output frequency between 1GHz and 10GHz)
- Compatible with a full digital beamforming or a mix analog/digital beamforming
WP3: Propagation channel modelling
- Channel characterization (Indoor and Outdoor) for a better knowledge of the mmW MIMO channel
- Developing a mmW M-MIMO channel simulator based on measurements data for helping specific algorithmic simulations
WP4: Baseband signal processing
This work package aims at leading investigations on the theoretical performance of mm wave MU-MIMO systems and propose signal processing algorithms offering a good performance/complexity trade-off in the perspective of the platform developments in WP5.
Main objectives:
- Assess the performance of various beamforming schemes for MU-MIMO systems taking into account
the specificities of mm waves in terms of propagation conditions and radio-frequency front-end
- Explore the potential of hybrid digital/analogue transmitter structures in mm waves for spatial-based multi-user multiplexing (see Fig 2.)
- Study the overall downlink/uplink capacity maximization of MU-MIMO mm wave transmission systems, taking into account channel estimation costs.
WP5: Baseband implementation & Platform Integration
- System design and specification based on the selected use case and HW platform capabilities
- RF front-end integration regarding to the antenna array specifications coming from WP2 and the b<>com platform capabilitiesBase-band signal processing and FPGA IP developments coming from the system specified by WP4
- Integration and validation of analogue RF and digital base-band components
- Demonstration and proof of concept validation