Using a precomputed Pascal's triangle table, the OFDM-IM index selector runs in O(N) time with Θ(N²) space instead of O(N²) time or exponential LUT space.
What is the cost of the index selector task for ofdm with index modulation?
1 Pith paper cite this work. Polarity classification is still indexing.
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Maximal Spectral Efficiency of OFDM with Index Modulation under Polynomial Space Complexity
Using a precomputed Pascal's triangle table, the OFDM-IM index selector runs in O(N) time with Θ(N²) space instead of O(N²) time or exponential LUT space.