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MOCZ for Blind Short-Packet Communication: Some Practical Aspects

Walk, Philipp and Jung, Peter and Hassibi, Babak and Jafarkhani, Hamid (2019) MOCZ for Blind Short-Packet Communication: Some Practical Aspects. . (Unpublished)

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We will investigate practical aspects for a recently introduced blind (noncoherent) communication scheme, called modulation on conjugate-reciprocal zeros (MOCZ), which enables reliable transmission of sporadic and short-packets at ultra-low latency in unknown wireless multipath channels, which are static over the receive duration of one packet. Here the information is modulated on the zeros of the transmitted discrete-time baseband signal's z−transform. Due to ubiquitous impairments between transmitter and receiver clocks a carrier frequency offset (CFO) will occur after a down-conversion to the baseband, which results in a common rotation of the zeros. To identify fractional rotations of the base angle in the zero-pattern, we propose an oversampled direct zero testing decoder to identify the most likely one. Integer rotations correspond to cyclic shifts of the binary message, which we compensate by a cyclically permutable code (CPC). Additionally, the embedding of CPCs into cyclic codes, allows to exploit additive error correction which reduces the bit-error-rate tremendously. Furthermore, we use the trident structure in the signals autocorrelation to estimate timing offsets and the channels effective delay spread. We finally demonstrate how these impairment estimations can be largely improved by receive antenna diversity, which enables extreme bursty reliable communication at low latency and SNR.

Item Type:Report or Paper (Discussion Paper)
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Additional Information:The authors would like to thank Richard Kueng, Anatoly Khina, and Urbashi Mitra for many helpful discussions. Peter Jung is supported by DFG grant JU 2795/3.
Funding AgencyGrant Number
Deutsche Forschungsgemeinschaft (DFG)JU 2795/3
Record Number:CaltechAUTHORS:20190402-083621511
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:94354
Deposited By: Tony Diaz
Deposited On:02 Apr 2019 17:15
Last Modified:03 Oct 2019 21:03

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