Soft copper wire : 20 gauge ( wire diameter 0.8mm ) : cut the segments 1.5cm ( 0.6 inch) , 3cm ( 1.2 inch), 4cm ( 1.6 inch), 5cm ( 2 inch), 10cm ( 4 inch) Beads : 4mm ( crystal abacus ) ...

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Abstract: Multiple access (MA) is a crucial part of any wireless system and refers to techniques that make use of the resource dimensions (e.g., time, frequency, power, antenna, code, and message) to ...