Guard Interval Per Symbol (Custom OFDM)
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Default: 0.25
Range: 0 to 1 (array of values)
Guard Interval Per Symbol specifies the Guard Intervals (also referred to as the cyclic prefix) as an array of values, one value for each symbol in the signal. The array is constrained to always contain at least one value. The default value is an array of length equal to one, with a value equal to 0.25.
Guard Interval is specified as a fraction of the OFDM Orthogonal Frequency Division Multiplexing: OFDM employs multiple overlapping radio frequency carriers, each operating at a carefully chosen frequency that is Orthogonal to the others, to produce a transmission scheme that supports higher bit rates due to parallel channel operation. OFDM is an alternative tranmission scheme to DSSS and FHSS. FFT Fast Fourier Transform: A mathematical operation performed on a time-domain signal to yield the individual spectral components that constitute the signal. See Spectrum. length. The value is unitless (not as percent). Guard intervals are used to ensure that distinct transmissions do not interfere with one another. The purpose of the guard interval is to introduce immunity to propagation delays, echoes and reflections, to which digital data is normally very sensitive.
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