Wireless multicarrier digital transmission via frames: Capacity analysis and optimization design

Abstract

By treating information transmission as tiling over the time-frequency plane, we propose a digital signal transmission scheme employing overcomplete frames as modulation pulses. The new scheme can achieve a signaling rate larger than the Nyquist rate. We first analyze the capacity performance of the frame transmission scheme over additive white Gaussian noise (AWGN) channels. It proves that the proposed scheme can achieve the Shannon capacity asymptotically. Next, we design the Gabor frame system parameters in time-frequency dispersive channels. It is shown that the pulses shape and the time-frequency separation should be matched to the channel dispersion parameters to achieve the minimum energy perturbation. Numerical results are presented to verify the theoretical findings.

Keywords

overcomplete / frame / Nyquist rate / signaling efficiency / capacity

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Acknowledgements

This work was supported in part by the National Natural Science Foundation of China (Grant Nos. 60975041, 61071067, and 61033004).

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2014 Higher Education Press and Springer-Verlag Berlin Heidelberg