Matrix analysis
The theory and practice of modem design
The theory and practice of modem design
Understanding digital subscriber line technology
Understanding digital subscriber line technology
Principles of Digital Transmission: With Wireless Applications
Principles of Digital Transmission: With Wireless Applications
Subspace-based blind channel identification of SISO-FIR systems with improper random inputs
Signal Processing - Signal processing in communications
A Constrained Maximum-SINR NBI-Resistant Receiver for OFDM Systems
IEEE Transactions on Signal Processing
Blind Frequency-Offset Estimation for OFDM/OQAM Systems
IEEE Transactions on Signal Processing
Redundant filterbank precoders and equalizers. I. Unification andoptimal designs
IEEE Transactions on Signal Processing
IEEE Transactions on Signal Processing
IEEE Transactions on Signal Processing
Blind channel identification and equalization withmodulation-induced cyclostationarity
IEEE Transactions on Signal Processing
A separability theorem for 2M conjugate-symmetric signals impingingon an M-element sensor array
IEEE Transactions on Signal Processing
Analysis and design of OFDM/OQAM systems based on filterbank theory
IEEE Transactions on Signal Processing
Second-order analysis of improper complex random vectors and processes
IEEE Transactions on Signal Processing
Widely linear estimation with complex data
IEEE Transactions on Signal Processing
A fine blind frequency offset estimator for OFDM/OQAM systems
IEEE Transactions on Signal Processing
Filterbank transceivers optimizing information rate in block transmissions over dispersive channels
IEEE Transactions on Information Theory
Complex random vectors and ICA models: identifiability, uniqueness, and separability
IEEE Transactions on Information Theory
Single-channel blind equalization for GSM cellular systems
IEEE Journal on Selected Areas in Communications
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In multicarrier (MC) systems, transmitter redundancy, which is introduced by means of finite-impulse response (FIR) linear precoders, allows for perfect or zero-forcing (ZF) equalization of FIR channels (in the absence of noise). Recently, it has been shown that the noncircular or improper nature of some symbol constellations offers an intrinsic source of redundancy, which can be exploited to design efficient FIR widely-linear (WL) receiving structures for MC systems operating in the presence of narrowband interference (NBI). With regard to both cyclic-prefixed and zero-padded transmission techniques, it is shown in this paper that, with appropriately designed precoders, it is possible to synthesize in both cases WL-ZF universal equalizers, which guarantee perfect symbol recovery for any FIR channel. Furthermore, it is theoretically shown that the intrinsic redundancy of the improper symbol sequence also enables WL-ZF equalization, based on the minimum mean output-energy criterion, with improved NBI suppression capabilities. Finally, results of numerical simulations are presented, which assess the merits of the proposed precoding designs and validate the theoretical analysis carried out.