Papers for

automotive wireless system engineers

Papers whose findings have a practical use for this group, as judged from the abstract. Open a paper to read what it means in practice.

Capacity limits and beam patterns boosted by location based communications

Capacity Analysis and Joint Gaussian Beam Pattern Optimization for Positioning-Assisted Communications

Abstract: Positioning-assisted beamforming is a novel enabling technology for massive multiple-input multiple-output in modern wireless communications, as it provides reliable beam steering without requiring explicit channel state information. However, the channel capacity analysis under positioning error remains mathematically intractable, which limits both performance characterization and beamforming design. In this work, we derive instantaneous and ergodic channel capacity approximations in closed forms for both two-dimensional and three-dimensional positioning-assisted beamforming systems. Based on the new expressions, we provide closed-form optimal joint Gaussian beam pattern that maximizes the asymptotic ergodic capacity. Numerical results verify the theoretical capacity expressions and the optimal beam pattern. The derived expressions enable efficient beam design to maximize channel capacity and provide a theoretical basis for positioning-assisted beamforming design.

Wed 23 SeptInformation Theory
The gist
Wireless devices send signals that bounce around, and to steer those signals well, devices often need to know exactly how the signals travel. This paper tackles the problem of improving signal steering by using the device’s position, even if the position information has some error. The authors provide new mathematical formulas that estimate how much data can be sent under these conditions and how to shape the signal beams optimally. This helps build better wireless systems that rely on location information without needing perfect knowledge of the signal environment.
Open → 2609.28196v1