Improved algorithms for cancellation carrier optimization to suppress the OFDM OOB spectrum

Authors:
Takayuki Matsuura;Yasutaka Iida;Chenggao Han;Takeshi Hashimoto
Affiliations:
University of Electro-Communications, Chofu, Tokyo, Japan;University of Electro-Communications, Chofu, Tokyo, Japan;University of Electro-Communications, Chofu, Tokyo, Japan;University of Electro-Communications, Chofu, Tokyo, Japan
Venue:
IEEE Communications Letters
Year:
2009

Citing 2
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Abstract

Cancellation carriers (CCs) are known to be effective for suppressing the out-of-band (OOB) spectrum of an orthogonal frequency-division multiplexing (OFDM) signal and are useful to realize OFDM-based overlay systems. We show that the known minimum-mean-square-error (MMSE) algorithm is not sufficient to reduced the OOB spectral peaks in the vicinity of transmission band boundaries compared to a direct min-max algorithm and show that a weighted MMSE (WMMSE) algorithm can attain almost the same suppression performance as the direct min-max algorithm with the same computational cost as the MMSE algorithm.