Iterative interference cancellation for high spectral efficiency satellite communications

2002 ◽  
Vol 50 (1) ◽  
pp. 31-36 ◽  
Author(s):  
B.F. Beidas ◽  
H. El Gamal ◽  
S. Kay
Keyword(s):  
Spectral Efficiency ◽  
Interference Cancellation ◽  
Satellite Communications ◽  
High Spectral Efficiency ◽  
Iterative Interference Cancellation

scholarly journals Densely Deployed Indoor Massive MIMO Experiment: From Small Cells to Spectrum Sharing to Cooperation

Sensors ◽  
2021 ◽  
Vol 21 (13) ◽  
pp. 4346
Author(s):  
Andrea P. Guevara ◽  
Sofie Pollin
Keyword(s):  
Spectral Efficiency ◽  
Interference Cancellation ◽  
Massive Mimo ◽  
Spectrum Sharing ◽  
Interference Suppression ◽  
Computational Cost ◽  
Small Cells ◽  
Optimal Capacity ◽  
High Spectral Efficiency ◽  
The Impact

Massive MIMO is a key 5G technology that achieves high spectral efficiency and capacity by significantly increasing the number of antennas per cell. Furthermore, due to precoding, massive MIMO allows co-channel interference cancellation across cells. In this work, based on experimental channel data for an indoor scenario, we analyse the impact of inter and intra-cell interference suppression in terms of spectral efficiency, capacity, user fairness and computational cost for three simulated systems under different cooperation levels. The first scenario assumes a cooperative case where eight neighbouring cells share the spectrum and infrastructure. This scenario provides the highest system performance; however, user fairness is achieved only when there is inter and intra-cell interference suppression. The second scenario considers eight cells that only share the spectrum; with full intra-cell and inter-cell interference cancellation, it is possible to achieve 32% of the optimal capacity with 20% of the computational cost in each distributed CPU, although the total computational cost per system is the highest. The third scenario considers eight independent cells operating in different frequency bands; in this case, intra-cell interference suppression leads to higher spectral efficiency compared to the cooperative case without intra-cell interference suppression.

scholarly journals Interference Cancellation for MIMO Systems Employing the Generalized Receiver with High Spectral Efficiency

2021 ◽  
Vol 17 ◽  
pp. 1-15
Author(s):  
Vyacheslav Tuzlukov
Keyword(s):  
Spectral Efficiency ◽  
Interference Cancellation ◽  
Rayleigh Fading ◽  
Mimo Systems ◽  
Coherent Detection ◽  
Symbol Error Probability ◽  
Receiving Antenna ◽  
High Spectral Efficiency ◽  
Approximate Expressions ◽  
Flat Rayleigh Fading

In this paper, we investigate the performan-ce in terms of symbol error probability (SEP) of multipleinput multiple-output (MIMO) systems employing the ge-neralized receiver with high spectral efficiency. In particular, we consider the coherent detection of M-PSK signals in a flat Rayleigh fading environment. We focus on spectrally efficient MIMO systems where after serial-to-parallel con-version, several sub-streams of symbols are simultaneously transmitted by using an antenna array, thereby increasing the spectral efficiency. The reception is based on linear mi-nimum mean-square-error (MMSE) combining, eventually followed by successive interference cancellation. Exact and approximate expressions are derived for an arbitrary nu-mber of transmitting and receiving antenna elements. Sim-ulation results confirm the validity of our analytical meth-odology.

Waveforms with High Spectral Efficiency for Terahertz Communications

2021 ◽  
Author(s):  
Mohamed Shehata ◽  
Ke Wang ◽  
Julian Webber ◽  
Masayuki Fujita ◽  
Tadao Nagatsuma ◽  
...  
Keyword(s):  
Spectral Efficiency ◽  
Terahertz Communications ◽  
High Spectral Efficiency
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