EP-4740373-A1 - SYSTEM AND METHODS FOR MULTIPLEXING WITH MODULATION ON ZEROS

Abstract

A first aspect of the present disclosure is related to a device for providing a communication signal, configured to: - provide a base signal, wherein the base signal is based on modulation on zeros, MOZ, wherein a zero-vector is chosen from a zero-constellation vector-set, to encode data into a data zero-vector, and in particular a guard zero-vector, to provide control information or to shape properties of the base signal.

Inventors

• DEHKORDI, Saeid
• JUNG, PETER
• WALK, Philipp
• HEUERMANN, Kai
• WIERUCH, DENNIS

Assignees

• MOXZ GmbH

Dates

Publication Date

20260513

Application Date

20240704

Claims (19)

1. 1 . A device for providing a communication signal, configured to: - provide a base signal, wherein the base signal is based on modulation on zeros, MOZ, wherein a zero-vector is chosen from a zero-constellation vector- set, to encode data into a data zero-vector, and in particular a guard zero- vector, to provide control information or to shape properties of the base signal.
2. 2. The device according to the preceding claim, configured to: - provide the MOZ base signal is based on a guard zero-vector that comprises one or more guard-zeros, wherein, in particular, the one or more guard zeros are characterized by one or more of the following characteristics in a complex plane: - being placed on/near the unit-circle; - being located as a contiguous block such that its phases are near a given phase; - being placed at "1".
3. 3. The device according to one of the two preceding claims, configured to: - provide a MOZ base signal of order K that comprises a zero-vector with K zeros; wherein a phase distance for each zero to its two next-neighbor zeros is 2TT/K in the complex plane.
4. 4. A device for providing communication signal, configured to: - obtain and/or determine multiple MOZ base signals; - provide a further signal based on one or more convolutions and/or correlations between individual linear transformations of the multiple MOZ base signals.
5. 5. The device according to the preceding claim, wherein the multiple MOZ base signals comprise individual zero-constellation vector-sets of pre-defined size.
6. 6. The device according to one of the preceding claims 4 to 5, wherein one or more of the linear transformations are a composition of multiple linear transformations.
7. 7. The device according to one of the preceding claims 4 to 6, wherein one or more of the linear transformations are a deterministic or random filter g combined with an expander E.
8. 8. The device according to one of the preceding claims 4 or 7, wherein one or more of the linear transformations are based on a deterministic and/or random time-frequency transformation.
9. 9. The device according to one of the preceding claims 4 or 8, wherein a linear transformation is a mapping D_£ based on a weighted repetition of a vector.
10. 10. The device according to one of the preceding claims 4 or 9, wherein a linear transformation is comprised in a sum of time-frequency transformation of weighted repetitions applied on one or more MOZ base signals.
11. 11 . The device according to one of the preceding claims 4 or 10, configured to: - provide a MOZ signal with a fingerprinting that encodes additional pre- determined information.
12. 12. A device for providing, in particular relaying, a communication signal, configured to: - obtain and/or determine a base signal; - add to the obtained and/or determined base signal an additional MOZ base signal by a third party or by itself, wherein the adding is based on a convolution and/or a correlation of the base signal with the MOZ base signal.
13. 13. The device according to the preceding claim, wherein the obtained and/or determined signal is a MOZ base signal using a zero-constellation-vector set which has no common zero to the zero- constellation-vector-set used by the added MOZ signal.
14. 14. The device according to one of the preceding two claims, wherein the convolution and/or correlation is based on a baseband and/or a passband.
15. 15. A device for providing a communication signal, configured to: - provide a MOZ base signal; wherein the zeros of the MOZ base signal are based on at least two different zero-constellation vector-sets for encoding different control and/or data payloads.
16. 16. A receiver for obtaining a communication signal, configured to: - obtain information on one or more used zero-constellation-vector-sets, each comprising a data zero-constellation-vector-set and a control zero- constellation-vector-set; - obtain a MOZ signal comprising a zero-constellation-vector that comprises a data zero-constellation-vector and a control zero-constellation-vector; - extract data from the obtained MOZ signal based the data zero-constellation- vector, on the control zero-constellation-vector, and on the data zero- constellation-vector-sets and the control zero-constellation-vector-sets.
17. 17. The receiver according to the preceding claim, configured to: - obtain a MOZ base signal comprising data zeros and control zeros; - determine a control MOZ-base signal based on known control zeros of the control zero-constellation vector sets; - convolve and/or correlate the obtained MOZ base signal with the determined control MOZ-base signal to determine a data signal from the MOZ base signal.
18. 18. A device for integrated communication and sensing, configured to: - provide a first signal comprising communication data, wherein the first signal is based on a MOZ; - obtain a second signal which is based on a reflection of the first signal; - correlate a third signal, based on characteristics of the first signal, with the second signal; - determine a time-based, a position-based, phase-based, and/or Doppler- based parameter based on a similarity measure, for example correlation.
19. 19. A device for providing a communication signal, configured to: - provide a first signal based on a MOZ and based on a first spatial and/or temporal characteristic; - provide a second signal based on a MOZ and on a second spatial and/or temporal characteristic; - identify a reflection based on the first signal and a reflection based on the second signal, wherein the identification is based on one or more correlations.

Description

System and Methods for Multiplexing with Modulation on Zeros Technical Field This disclosure is related to devices for transmitting, receiving, and sensing signals in relation to Modulation on Zeros Background Modulation On Zeros (MOZ) is a recently developed communication technique (US 10,797,926 B2) used to modulate data by manipulating the positions of zeros of a polynomial of a base signal. Unlike traditional modulation schemes that map information to modulated IQ samples in time or frequency domain, MOZ maps information to zeros in a complex plane, which define a polynomial, and transforms them back to the polynomial coefficients which are the modulated IQ-samples in time domain. This method can provide advantages in certain communication environments, particularly in multipath- rich and/or high mobility scenarios. Further developments of this communication scheme are presented in the following. Summary An object of the present disclosure is to improve a communication based on Modulation on Zeros. This object is solved by the disclosed embodiments, which are defined in particular by the subject matter of the independent claims. The dependent claims provide information for further embodiments. Various aspects and embodiments of these aspects are also disclosed in the summary and description below, which provide additional features and advantages. In this disclosure, embodiments for a signaling scheme between host and target are presented, which use a recently disclosed non-coherent modulation scheme called Modulation on Zeros. MOZ is used here in combination with a spatial-temporal (ST) pulsed-beam-sweeping technique. The host and target can be vehicles or a mobile transceivers in general. The invention allows a reliable transmission of data from hosts to targets, in a given observable region, and at the same time the sensing of the 2D/3D MIMO channel at the hosts (mono-static radar where host transmitter and host receiver are co-located), i.e. sensing the channel in time by its paths delays, gains and phases and in space by its paths directions. In a modification of the target receiver, a sensing of the 2D/3D MIMO channel is also possible at the target. In a further modification, a third party could also sense the 2D/3D MIMO channel between the transmit host and target by receiving the reflection from the target as well. This passively receiving third party can identify a position of a target if it knows the position of a transmitting host (bi-static radar) and is properly synchronized with the transmitting host. Some of the disclosed embodiments based on the MOZ signaling scheme allow for a fast beam-sweeping of a given spatial-domain with higher accuracy in speed and position estimations of the targets, by utilizing shorter pulsed- radar signals with an Interference Suppression technique for signals of adjacent beams. The transmitted signals are hereby spread over a spatial- temporal-domain, given by the triple (Q, R, T). The observable Spatial-Domain O = Q A R, is defined for two dimensions in an azimuth plane by the angle <p in an angular area Q, which defines a direction of a target from a hosts driving direction, and by a distance d in the range region R. The temporal-domain T is separated in consecutive time-slots T n, in which a complete signal is transmitted in one direction. In a more particular case of MOZ called Modulation on Conjugate-reciprocal Zeros (MOCZ), improved radar properties and non-coherent data transmission can be achieved, since the signals can be kept extremely short in time, allowing an increased communication-radar performance. A first aspect of the present disclosure is related to a device for providing a communication signal, configured to: - provide a base signal, wherein the base signal is based on modulation on zeros, MOZ, wherein a zero-vector is chosen from a zero-constellation vector- set, to encode data into a data zero-vector, and in particular a guard zero- vector, to provide control information or to shape properties of the base signal. A base signal can be sequence of complex-numbers, e.g. representing the IQ samples of a time-discrete baseband signal. In particular a base signal can be a finite sequence of complex-numbers. For a base signal based on modulation on zeros (MOZ) the sequence of complex-numbers are the coefficients of a polynomial determined by its roots/zeros given by a zero-vector and a scaling factor. For a base signal x based on MOZ of order K the polynomial X(z) has K zeros a_1 , a_2, . . . , a_K, defined as the coefficient of the zero-vector a, and K +1 polynomial coefficients x_0, x_1 . . . , x_K, defined as the coefficient of the base signal x. As an example for K = 2 consider x_2*zA2 +x 1*z+x_0 = x_2*(z-a_1 )*(z-a_2 ) = X(z), where the complex-numbers x_0 , x_1 and x_2 are the coefficients of the polynomial X(z) and the coefficients of the zero-vector a = (a_1 , a_2 ) are its zeros/roots and x_2 its complex-valued scaling factor. A zer