5G mobile communication systems Bacteria Biodegradation, Environmental Bit error rate Bit-error rate Channel estimation Channel estimation algorithms Degradation Errors Fading channels Frequency selective fading Frequency-selective fading channels Glycine Glyphosate Herbicides MATLAB Mean square error Minimum mean square error algorithms OFDM systems Optimization Optimization algorithms Response surface methodology Rhodococcus Sarcosine Soil Soil Microbiology Statistical characteristics Under frequencies Wireless channel Wireless communication system