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MOCZ for Blind Short-Packet Communication: Practical Aspects

Walk, Philipp and Jung, Peter and Hassibi, Babak and Jafarkhani, Hamid (2020) MOCZ for Blind Short-Packet Communication: Practical Aspects. IEEE Transactions on Wireless Communications, 19 (10). pp. 6675-6692. ISSN 1536-1276.

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We investigate practical aspects of a recently introduced blind (noncoherent) communication scheme, called modulation on conjugate-reciprocal zeros (MOCZ). MOCZ is suitable for a reliable transmission of sporadic and short-packets at ultra-low latency and high spectral efficiency via unknown multipath channels, which are assumed to be static over the receive duration of one packet. The information is modulated on the zeros of the transmitted discrete-time baseband signal’s z− transform. Because of ubiquitous impairments between the transmitter and receiver clocks, a carrier frequency offset occurs after down-conversion to the baseband. This 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 determine by cyclically permutable codes (CPC). Additionally, the embedding of CPCs into cyclic codes, enables additive error-correction which reduces the bit-error-rate tremendously. Furthermore, we exploit the trident structure in the signal’s autocorrelation for an energy based detector to estimate timing offsets and the effective channel delay spread. We finally demonstrate how this joint data and channel estimation can be largely improved by receive antenna diversity at low SNR.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Walk, Philipp0000-0002-8476-3464
Jung, Peter0000-0001-7679-9697
Jafarkhani, Hamid0000-0001-6838-8038
Alternate Title:MOCZ for Blind Short-Packet Communication: Some Practical Aspects
Additional Information:© 2020 IEEE. Manuscript received May 30, 2019; revised November 9, 2019 and May 4, 2020; accepted June 15, 2020. Date of publication July 15, 2020; date of current version October 9, 2020. The work of Peter Jung was supported by Deutsche Forschungsgemeinschaft (DFG) under Grant JU 2795/3. The associate editor coordinating the review of this article and approving it for publication was K. Huang. The authors would like to thank Richard Kueng and Urbashi Mitra for many helpful discussions.
Funding AgencyGrant Number
Deutsche Forschungsgemeinschaft (DFG)JU 2795/3
Subject Keywords:BMOCZ, carrier-frequency offset, single-input multiple-output (SIMO), timing offset
Issue or Number:10
Record Number:CaltechAUTHORS:20190402-083621511
Persistent URL:
Official Citation:P. Walk, P. Jung, B. Hassibi and H. Jafarkhani, "MOCZ for Blind Short-Packet Communication: Practical Aspects," in IEEE Transactions on Wireless Communications, vol. 19, no. 10, pp. 6675-6692, Oct. 2020, doi: 10.1109/TWC.2020.3004588
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:21 Oct 2020 16:52

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