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Published November 2019 | public
Journal Article

MOCZ for Blind Short-Packet Communication: Basic Principles

Abstract

We introduce a novel blind (noncoherent) communication scheme, called modulation on conjugate-reciprocal zeros (MOCZ), pronounced as "Moxie," to reliably transmit sporadic short-packets over unknown wireless multipath channels. In MOCZ, the information is modulated onto the zeros of the transmitted discrete-time baseband signal's z-transform, which yields to a codebook of non-orthogonal signals. In the absence of additive noise, the zero structure of the signal is perfectly preserved at the receiver, no matter what the channel impulse response (CIR) is. Furthermore, by a proper selection of the zeros, we show that MOCZ is not only invariant to the CIR but also robust against additive noise. Starting with the maximum-likelihood estimator, we define a low complexity and reliable decoder and compare it to various state-of-the-art noncoherent multipath schemes, such as OFDM index-modulation (IM), OFDM pilot-aided, OFDM differential-modulation, and pulse-position-modulation. Our scheme outperforms all schemes and maintains its performance even if the length becomes shorter than the CIR.

Additional Information

© 2019 IEEE. Manuscript received October 3, 2018; revised February 1, 2019 and June 4, 2019; accepted July 18, 2019. Date of publication August 8, 2019; date of current version November 11, 2019. The work of P. Walk was supported by the Deutsche Forschungsgemeinschaft (DFG) under Project WA 3390/1. The work of P. Jung was supported by DFG under Grant JU 2795/3. The work of B. Hassibi was supported in part by the National Science Foundation under Grant CNS-0932428, Grant CCF-1018927, Grant CCF-1423663, and Grant CCF-1409204, in part by the Grant from Qualcomm Inc., in part by the NASA's Jet Propulsion Laboratory through the President and Director's Fund, and in part by the King Abdullah University of Science and Technology. The authors would like to thank Richard Kueng, Anatoly Khina, Hamid Jafarkhani, and Urbashi Mitra for many helpful discussions. They like to thank Mattia Carrera for his work during a summer program (SURF) at Caltech. Moreover, they want to thank the anonymous reviewers and editor for their constructive feedback which helped significantly to improve the presentation of our novel scheme.

Additional details

Created:
August 19, 2023
Modified:
March 5, 2024