A Novel Reduced Complexity MMSE-Based Receiver for OFDM Broadband Wireless Networks

Zero-Padding Orthogonal Frequency Division Multiplexing (ZP-OFDM) has been proposed as an alternative solution to coded-OFDM, which often incurs high decoding complexity. Various ZP-OFDM receivers have been proposed in the literature, exchanging performance with complexity. On the contrary, we propose in this paper a novel reduced-complexity minimum mean square error (MMSE)-based receiver for ZP-OFDM transmissions without sacrificing performance. We demonstrate that the proposed receiver enjoys a remarkably simple decoding scheme, while outperforming conventional ZP-OFDM-MMSE in terms of symbol error rate (SER) performance. We further show that, by incorporating linear processing techniques, our MMSE-based receiver is able to collect full antenna and multipath diversity gains.