Excess-Bandwidth Transmit Filtering Based on Minimization of Variance of Instantaneous Transmit Power for Low-PAPR SC-FDE

Amnart BOONKAJAY  Tatsunori OBARA  Tetsuya YAMAMOTO  Fumiyuki ADACHI  

Publication
IEICE TRANSACTIONS on Communications   Vol.E98-B   No.4   pp.673-685
Publication Date: 2015/04/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E98.B.673
Type of Manuscript: PAPER
Category: Wireless Communication Technologies
Keyword: 
single-carrier transmission,  transmit filtering,  peak-to-average power ratio (PAPR),  

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Summary: 
Square-root Nyquist transmit filtering is typically used in single-carrier (SC) transmission. By changing the filter roll-off factor, the bit-error rate (BER), peak-to-average power ratio (PAPR), and spectrum efficiency (SE) changes, resulting in a tradeoff among these performance indicators. In this paper, assuming SC with frequency-domain equalization (SC-FDE), we design a new transmit filtering based on the minimum variance of instantaneous transmit power (VIP) criterion in order to reduce the PAPR of the transmit signal of SC-FDE. Performance evaluation of SC-FDE using the proposed transmit filtering is done by computer simulation, and shows that the proposed transmit filtering contributes lower transmit PAPR, while there exists only a small degradation in BER performance compared to SC-FDE using square-root Nyquist filtering.