Abstract
The deployment of the Millimeter-Wave (mm-Wave) band in 5G and beyond wireless communications networks is one of the emerging fields owing to its potential of providing extensive bandwidth. Frequency Hopping (FH) has a high potential for use in wireless networks due to its key advantages of spreading the interference over wide bandwidth and of providing diversity gain in counteracting frequency-selective fading. Furthermore, Fast Frequency Hopping (FFH) intrinsically amalgamated with directional Beamforming (BF) may overcome the impairments because of the path-loss of mm-Wave communications. Thus, we propose FFH assisted base-band precoding aided BF for mitigating the mm-wave channel impairments imposed by both fading as well as path loss, whilst relying on a minimal range of radio frequency chains. The mathematical analysis and simulation results demonstrate that hybrid precoded FFH is indeed a promising high-capacity technique of attaining both time- and frequency-domain diversity gains for the mm-Wave communications.
Highlights
T HE rapid proliferation of mobile devices coupled with increased usage of high bandwidth multimedia application underpins the demand for supporting increased throughput in wireless communication networks [1]–[4]
In some of the Fast Frequency Hopping (FFH) systems the identical symbols are repeated during several hops, which are associated with a different frequency and a different time slot
We propose a novel implementation of FFH system in mm-Wave channel by using linear combination techniques
Summary
It is anticipated that all communication from mobile User Equipment (UE) is scheduled by the BS on the link which employs FFH-MFSK transmission [24], [58], [59]. Where the transmitted power signal is Ps, the carrier frequency is fc, the frequency tone is fl(k) which is calculated by utilizing the information of Xk and ak(l), and the normalised pulse waveform is p(t) having duration Th. φkl is the initial phase introduced by the MFSK. The response vector ar and at of Uniform Linear Array (ULA) having antenna elements
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