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Optimal Precoders f...
Abstract
Ämnesord
Stäng
- In millimeter-wave channels, most of the received energy is carried by a few paths. Traditional precoders sweep the angle-of-departure (AoD) and angle-of-arrival (AoA) space with directional precoders to identify directions with largest power. Such precoders are heuristic and lead to suboptimal AoD/AoA estimation. We derive optimal precoders, minimizing the Cramér–Rao bound (CRB) of the AoD/AoA under a given uncertainty range, assuming a fully digital architecture at the transmitter and spatial filtering of a single path. The precoders are found by solving a suitable convex optimization problem. We demonstrate that the accuracy can be improved by at least a factor of two over traditional precoders, and show that there is an optimal number of distinct precoders beyond which the CRB does not improve.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Elektroteknik och elektronik -- Signalbehandling (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Electrical Engineering, Electronic Engineering, Information Engineering -- Signal Processing (hsv//eng)
Nyckelord
- antenna arrays
- array signal processing
- Uncertainty
- Transmitters
- precoding
- Millimeter wave communication
- Receivers
- Radar tracking
- optimization
- Signal to noise ratio
- Channel estimation
- Cramér–Rao bounds
- antenna radiation patterns
- Estimation
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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