In this paper, we study hierarchical codebook design for channel estimation in millimeter-
wave (mmWave) communications with a hybrid precoding structure. Due to the limited …

The existing channel estimation methods for millimeter-wave communications, eg,
hierarchical search and compressed sensing, either acquire only one single multipath …

The digital or analog precoders are not carried the optimal energy efficiency in the mm-wave
massive MIMO and so, every antenna is needed with one radio frequency chain in the …

There is growing interest in using millimeter wave (mmWave) communication for fifth
generation (5G) wireless systems because of the large bandwidth available in these …

Millimeter wave (mmWave) technologies can enable current mobile communication systems
to achieve higher data rates. However, wireless channels at mmWave frequencies …

Millimeter wave (mmWave) cellular systems will enable gigabit-per-second data rates
thanks to the large bandwidth available at mmWave frequencies. To realize sufficient link …

The use of the millimeter (mm) wave spectrum for next generation (5G) mobile
communication has gained significant attention recently. The small carrier wavelengths at …

This paper is concerned with the channel estimation problem in millimeter wave (mmWave)
wireless systems with large antenna arrays. By exploiting the inherent sparse nature of the …

In millimeter-wave communication, large antenna arrays are required to achieve high power
gain by steering toward each other with narrow beams, which poses the problem to …

Due to the spatial sparsity caused by severe propagation loss, mm-wave channel estimation
can be performed by estimating the directions and gains of the paths that have significant …