Exact(4)
This joint approach relies on a threshold to identify the first significant tap using the estimated channel impulse responses (CIR).
Previously reported approaches for sparse channel estimation can broadly be categorized into two types, namely the most significant tap (MST) detection and compressed channel sensing (CCS).
For this reason, we also implement the Most Significant Tap (MST) channel estimation [48], applied to [26], where we only take the most significant taps.
While all the chromosomes are under significant TAP, a portion of them is under no or little RAP.
Similar(55)
The first 6 most significant taps are used to calculate the minimum-phase pre-filter.
Then, we choose the most significant taps from and reserve it as, by formula (18).
Next, the most significant taps are kept (i.e., the first values), this way avoiding noise caused by nonexistent taps.
Secondly, the most significant taps (MSTs) algorithm [21] has been proposed to obtain the refined channel estimation in time domain.
Then we choose the most significant taps from and reserve the indeces of them into a set.
The numerator of (2) is the signal power scaled by the power of the μ significant taps in c, and the denominator contains the total received signal power.
Subsequently, optimal rank reduction is applied to obtain significant taps resulting in a smaller computational load on the proposed estimation algorithm.
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