Coded Energy-Efficient Beam-Alignment for Millimeter-Wave Networks

TL;DR

This paper introduces a coded, energy-efficient beam-alignment method for millimeter-wave networks that enhances robustness against detection errors and improves energy efficiency, achieving significant performance gains over traditional schemes.

Contribution

It proposes a novel coded beam-alignment scheme with error correction, optimized beam-to-codeword assignment, and a water-filling solution for energy efficiency, addressing detection errors in millimeter-wave communications.

Findings

Achieves up to 4dB gain over exhaustive schemes

Achieves up to 8dB gain over uncoded schemes

Demonstrates robustness against detection errors

Abstract

Millimeter-wave communications rely on narrow-beam transmissions to cope with the strong signal attenuation at these frequencies, thus demanding precise alignment between transmitter and receiver. However, the beam-alignment procedure may entail a huge overhead and its performance may be degraded by detection errors. This paper proposes a coded energy-efficient beam-alignment scheme, robust against detection errors. Specifically, the beam-alignment sequence is designed such that the error-free feedback sequences are generated from a codebook with the desired error correction capabilities. Therefore, in the presence of detection errors, the error-free feedback sequences can be recovered with high probability. The assignment of beams to codewords is designed to optimize energy efficiency, and a water-filling solution is proved. The numerical results with analog beams depict up to 4dB and 8dB gains over exhaustive and uncoded beam-alignment schemes, respectively.