Multicarrier waveforms with I/Q staggering: uniform and nonuniform FBMC formats

Starting from the well-known uniform filter bank multicarrier (FBMC) format with Nyquist spectral shaping of frequency-limited orthogonal (FLO) subchannels and its dual time-frequency, time-limited orthogonal (TLO) form, we introduce an orthogonal frequency division multiplex of nonuniformly spaced subchannels with unequal width.The orthogonality conditions for nonuniform FBMC (Nu-FBMC) were evaluated through simulations using the ‘extended orthogonal frequency division multiplexing (OFDM)’ framework, as well as through analytical derivation in a rather pragmatic manner. The referent filter bank impulse responses were defined in frequency domain by straightforward aggregations of the pertaining uniform filter bank subchannels spectral shapes for FLO and by transforming the frequency domain of appropriately aggregated time-limited referent impulse responses of uniform TLO configuration. Nonsymmetrical spectral shaping of subchannels in the FLO case format has also been proposed. The spectral efficiency has been evaluated in the presence of nonlinear distortions caused by high power amplifier (HPA), and results have been given in accordance with power spectral density (PSD) constraints defined by IEEE 802.11a standard.

[1]  Markus Gerald Konrad,et al.  Interference Robust Transmission for the Downlink of an OFDM-Based Mobile Communications System , 2008, EURASIP J. Wirel. Commun. Netw..

[2]  Lars Wanhammar,et al.  Tree-structured IIR/FIR octave-band filter banks with very low-complexity analysis filters , 2001, ISCAS 2001. The 2001 IEEE International Symposium on Circuits and Systems (Cat. No.01CH37196).

[3]  John Princen.  The design of nonuniform modulated filterbanks , 1995, IEEE Trans. Signal Process..

[4]  Claude Berrou,et al.  Coded orthogonal frequency division multiplex [TV broadcasting] , 1995, Proc. IEEE.

[5]  B. Farhang-Boroujeny,et al.  FILTER BANK MULTITONE : A PHYSICAL LAYER CANDIDATE FOR COGNITIVE RADIOS , 2005 .

[6]  Juha Yli-Kaakinen,et al.  Fast-convolution filter bank approach for non-contiguous spectrum use , 2013, 2013 Future Network & Mobile Summit.

[7]  Shing-Chow Chan,et al.  Theory and design of a class of cosine-modulated non-uniform filter banks , 2000, 2000 IEEE International Conference on Acoustics, Speech, and Signal Processing. Proceedings (Cat. No.00CH37100).

[8]  Håkan Johansson,et al.  Reconfigurable Nonuniform Transmultiplexers Using Uniform Modulated Filter Banks , 2011, IEEE Transactions on Circuits and Systems I: Regular Papers.

[9]  C. Rapp,et al.  Effects of HPA-Nonlinearity on a 4-DPSK/OFDM-Signal for a Digital Sound Broadcasting System. , 1991 .

[10]  Zoran Cvetkovic,et al.  Nonuniform oversampled filter banks for audio signal processing , 2003, IEEE Trans. Speech Audio Process..

[11]  S. Nedic.  An unified approach to equalization and echo cancellation in OQAM-based multi-carrier data transmission , 1997, GLOBECOM 97. IEEE Global Telecommunications Conference. Conference Record.

[12]  Robert Vallet,et al.  Interference cancellation in coded OFDM/OQAM , 2012, 2012 International Symposium on Wireless Communication Systems (ISWCS).

[13]  Pascal Chevalier,et al.  New insights into optimal widely linear array receivers for the demodulation of BPSK, MSK, and GMSK signals corrupted by noncircular interferences-application to SAIC , 2006, IEEE Transactions on Signal Processing.

[14]  Konstantinos N. Plataniotis,et al.  An enhanced widely linear CDMA receiver with OQPSK modulation , 2006, IEEE Transactions on Communications.

[15]  G. Stette,et al.  Time-limited orthogonal multicarrier modulation schemes , 1995, IEEE Trans. Commun..