Brazil’s
telecom industry,
in focus.

Wireless Sensor Network Beamforming Issues

21.0% of this theme group

Researchers highlight challenges in distributed beamforming, connectivity, and energy use for sensor networks.

Beamforming (166) · Wireless (55) · Channel (24) · Computer network (23)

Distributed and Collaborative Beamforming in Wireless Sensor Networks: Classifications, Trends, and Research Directions

Distributed Beamforming for Wireless Sensor Networks With Improved Graph Connectivity and Energy Efficiency

Acoustic Beamforming Limitations

16.4% of this theme group

Papers discuss noise, transducer constraints, and signal-loss effects that hinder acoustic beamforming performance.

Beamforming (118) · Acoustics (20) · Transducer (6) · Noise (9)

APPLICATION OF PLANAR BEAMFORMING METHOD TO IDENTIFICATION OF SPINNING ACOUSTIC MODES

Improved beamforming by accounting for multiple domain shifts and sources of signal loss

Massive MIMO Deployment Barriers

16.3% of this theme group

Studies identify scalability, interference, and hardware obstacles in next‑generation multi‑user MIMO systems.

MIMO (130) · 3G MIMO (35) · Multi-user MIMO (24) · Telecommunications (39)

Massive MIMO for next generation wireless systems

Mobile Cell-Free Massive MIMO: Challenges, Solutions, and Future Directions

Coordinated Beamforming for 5G

13.0% of this theme group

Works examine practical difficulties in coordinated multipoint and large‑scale antenna deployments for cellular networks.

MIMO (52) · Beamforming (55) · Telecommunications (30) · Software deployment (14)

Exploring Coordinated Multipoint Beamforming Strategies for 5G Cellular

Practical Large Scale Antenna Systems for 5G cellular networks

Spectral Efficiency and Interference

12.4% of this theme group

Research points to lattice‑based techniques and full‑duplex interference as key efficiency challenges.

Spectral efficiency (20) · Lattice reduction (6) · Lattice (6) · Interference (15)

Full-Duplex Cellular Networks

A Review of Techniques and Challenges in Green Communication

MIMO Radar Integration Challenges

11.7% of this theme group

Papers address mutual interference and control complexities when merging MIMO radar with communication links.

MIMO (88) · Radar (20) · Control theory (13) · Electronic engineering (26)

MIMO OFDM Radar-Communication System with Mutual Interference Cancellation

A Survey on Over-The-Air Linearization Methods for MIMO Systems

Phased‑Array Scaling Obstacles

9.2% of this theme group

Studies focus on antenna array design, sensitivity, and millimeter‑wave scaling problems.

Phased array (30) · Antenna array (15) · Beamforming (60) · Antenna (24)

High-Sensitivity Phased Array Receivers for Radio Astronomy

Scaling Millimeter-Wave Phased Arrays: Challenges and Solutions

Beamforming Implementation Risks

19.5% of this theme group

Authors caution about practical limits, network integration, and performance gaps in distributed beamforming.

Beamforming (218) · Base station (38) · Computer network (25) · Wireless (28)

Distributed transmit beamforming: challenges and recent progress

Design and experimental evaluation of multi-user beamforming in wireless LANs

MIMO Precoding Hardware Impairments

18.1% of this theme group

Works warn of transceiver imperfections, phase noise, and capacity losses affecting MIMO precoding.

MIMO (191) · Telecommunications link (61) · Electronic engineering (65) · Precoding (34)

MIMO capacities and outage probabilities in spatially multiplexed optical transport systems

Massive MIMO with Transceiver Hardware Impairments: Performance Analysis and Phase Noise Error Minimization

Adaptive Acoustic Beamforming Uncertainties

17.7% of this theme group

Research highlights sensitivity to localization errors and environmental noise in adaptive acoustic beamforming.

Beamforming (179) · Adaptive beamformer (26) · Acoustics (27) · Noise (18)

An analysis of beamforming algorithms for passive bottom reflection-loss estimation

On the Impact of Localization Errors on HRTF-based Robust Least-Squares\n Beamforming

Hybrid Beamforming Power Constraints

14.9% of this theme group

Papers note energy inefficiencies and nonlinear amplifier effects in hybrid MIMO beamforming for millimeter‑wave.

MIMO (152) · Beamforming (113) · Radar (20) · Waveform (10)

On the Energy Efficiency of MIMO Hybrid Beamforming for Millimeter-Wave Systems With Nonlinear Power Amplifiers

Performance Evaluation of Analog Beamforming with Hardware Impairments for mmW Massive MIMO Communication in an Urban Scenario

Interference Management Complexity

11.7% of this theme group

Studies caution about the difficulty of aligning and harvesting interference in dense full‑duplex networks.

Spectral efficiency (35) · Interference (32) · Lattice reduction (5) · Electronic engineering (25)

Harvesting the (Self-)Interference in Heterogeneous Full-Duplex Networks For Joint Rate-Energy Optimization.

System-level performance of interference alignment

Array Calibration and Frequency Errors

10.7% of this theme group

Works point to calibration challenges and frequency mismatches that weaken microphone and phased‑array performance.

Microphone array (17) · Beamforming (88) · Phased array (23) · Antenna array (16)

Evaluating seismic beamforming capabilities of distributed acoustic sensing arrays

On the Impact of Frequency Discrepancy on Beamforming Performance in Millimeter-Wave Phased Array Antenna Systems

Exposure and Deployment Safety

7.3% of this theme group

Research raises health exposure concerns and field‑test complexities for 5G beamforming and distributed MIMO.

Beamforming (48) · MIMO (35) · Antenna (18) · Base station (16)

Assessment of Human Exposure Levels Due to Mobile Phone Antennas in 5G Networks

Outdoor experiments on 5G radio access using distributed MIMO and beamforming in 28-GHz frequency band

Integrated Sensing and Communication Beamforming

24.3% of this theme group

Papers explore joint beamforming designs that combine wireless transmission with sensing capabilities.

Beamforming (1,396) · Wireless (256) · Base station (239) · Transmission (158)

Joint and Robust Beamforming Framework for Integrated Sensing and Communication Systems

3D Beamforming in Reconfigurable Intelligent Surfaces-assisted Wireless Communication Networks

Adaptive Acoustic Beamforming for Speech

18.6% of this theme group

Studies pursue adaptive techniques to improve target detection, surveillance, and speech enhancement.

Beamforming (891) · Adaptive beamformer (167) · Acoustics (134) · Speech recognition (71)

Adaptive Beamforming for Target Detection and Surveillance Based on Distributed Unmanned Aerial Vehicle Platforms

Performance evaluation of beamforming techniques for speech enhancement

Advanced Precoding for Full‑Duplex MIMO

17.9% of this theme group

Research targets low‑complexity precoding schemes that boost spectral and energy efficiency in full‑duplex systems.

MIMO (673) · Precoding (238) · Telecommunications link (199) · Electronic engineering (234)

Precoding for Full Duplex Multiuser MIMO Systems: Spectral and Energy Efficiency Maximization

A low-complexity linear precoding and power allocation scheme for downlink massive MIMO systems

Hybrid Beamforming for Massive MIMO

12.7% of this theme group

Works develop hybrid and regularized beamforming methods to support high‑capacity millimeter‑wave MIMO links.

MIMO (596) · Beamforming (727) · Telecommunications link (145) · Precoding (116)

Beamforming techniques for massive MIMO systems in 5G: overview, classification, and trends for future research

Hybrid Beamforming for Millimeter Wave Massive Multiuser MIMO Systems Using Regularized Channel Diagonalization

Real‑Time Digital Phased‑Array Techniques

10.9% of this theme group

Papers present adaptive strategies for simultaneous transmit/receive and rapid beam steering in phased arrays.

Phased array (216) · Beamforming (532) · Antenna array (94) · Phased-array optics (37)

Aperture-Level Simultaneous Transmit and Receive With Digital Phased Arrays

A Real-Time Adaptive Station Beamforming Strategy for Next Generation Phased Array Radio Telescopes

Compact Multi‑Band MIMO Antenna Designs

8.6% of this theme group

Research focuses on tightly spaced dual‑band antennas that reduce coupling while supporting diverse wireless standards.

MIMO (445) · Antenna (275) · Electronic engineering (231) · Decoupling (59)

Dual MIMO Antenna System for 5G Mobile Phones, 5.2 GHz WLAN, 5.5 GHz WiMAX and 5.8/6 GHz WiFi Applications

A CLOSELY SPACED DUAL-BAND MIMO PATCH ANTENNA WITH REDUCED MUTUAL COUPLING FOR 4G/5G APPLICATIONS

MIMO Radar Waveform Innovation

7.0% of this theme group

Studies investigate frequency‑diverse and joint direction estimation techniques to enhance radar imaging performance.

Radar (243) · MIMO (328) · Waveform (52) · Radar imaging (31)

MIMO Radar with Frequency Diversity

Joint direction-of-departure and direction-of-arrival estimation in an ultra-wideband MIMO radar system

Sao Paulo

46.0% across the displayed hubs

4 companies hiring · $658.6M disclosed funding

Rio De Janeiro

16.6% across the displayed hubs

3 companies hiring · $9.8M disclosed funding

Fortaleza

7.7% across the displayed hubs

1 companies hiring · $0 disclosed funding

Belo Horizonte

7.0% across the displayed hubs

1 companies hiring · $0 disclosed funding

Parana

6.4% across the displayed hubs

1 companies hiring · $0 disclosed funding

Curitiba

6.1% across the displayed hubs

0 companies hiring · $2.5M disclosed funding

Salvador

5.4% across the displayed hubs

0 companies hiring · $0 disclosed funding

Recife

4.8% across the displayed hubs

0 companies hiring · $0 disclosed funding