Otfs reference signal transmission with improved resource utilization

Abstract

The invention relates to OTFS reference signal transmission with improved resource utilization. An OTFS communication method for communicating between a transmitting TX node and a receiving RX node by means of an orthogonal time-frequency space OTFS signal is provided. The OTFS communication method comprises the steps of: transmitting (101) an OTFS reference signal in the Nth time slot of the OTFS signal, where N is a first natural number; receiving (102) the OTFS signal; and using (103) the OTFS reference signal to process the Nth time slot up to the (N + M-1) th time slot of the corresponding received OTFS signal, where M is a second natural number greater than 1.

Description

TECHNICAL FIELD

[0001] The present invention relates to Orthogonal Time Frequency Space, OTFS, reference signal transmission with improved resource utilization. In particular, the present invention relates to an OTFS communication method, an OTFS transmitting device, an OTFS receiving device, an OTFS communication system, an OTFS transmitting device tester, an OTFS receiving device tester, and an OTFS communication system tester for communicating between a transmitting, TX, node and a receiving, RX, node by means of an OTFS signal. BACKGROUND

[0002] Generally, in case OTFS is adopted in an increasing number of communication applications, there is an increasing need to reduce data overheads that adversely affect resource utilization.

[0003] For example, WO 2023 / 155037 Al relates to wireless communication. In some aspects, a first user equipment (UE) can receive, from a network entity, a cross-link interference (CLI) sounding reference signal (SRS) measurement resource configuration indicating an orthogonal time frequency space (OTFS) modulated SRS associated with a second UE. The first UE can receive, from the second UE, the OTFS modulated SRS based at least in part on the CLI SRS measurement resource configuration. The first UE can perform a CLI measurement of one or more symbols in which the OTFS modulated SRS is transmitted. The first UE can transmit, to the network entity, a measurement report indicating the CLI measurement.

[0004] Further, WO 2023 / 137652 Al relates to wireless communication. In some aspects, a user equipment (UE) can receive, from a base station, a configuration of a control region in a delay-Doppler domain. The UE can receive, from the base station, a physical downlink control channel (PDCCH) communication with orthogonal time frequency space (OTFS) precoding. The UE can decode the PDCCH communication with the OTFS precoding based at least in part on the configuration of the control region in the delay-Doppler domain.

[0005] Further, WO 2023 / 280146 Al discloses a transmission method and apparatus, a communication device, and a storage medium. The transmission method comprises: determining, by a communication device, a communication frame for transmitting a target signal, the communication frame comprising a first part for transmitting the target signal and a second part for receiving a sensing signal, the sensing signal being a back echo signal of the target signal; transmitting, by the communication device, the target signal in the first part of the communication frame; and receiving, by the communication device, the sensing signal in the second part of the communication frame.

[0006] In addition thereto, US 2023 / 0246679 A1 relates to wireless communication. In some aspects, a user equipment (UE) can precode a sounding reference signal (SRS) transmission using a delay-Doppler precoder. After precoding the SRS transmission using the delay-Doppler precoder, the UE can transmit the SRS transmission in an SRS symbol in a slot. SUMMARY

[0007] Therefore, in particular in view of the above-mentioned disadvantageous data overhead, it is an object of the present application to provide an OTFS communication method for communicating between a transmitting (TX) node and a receiving (RX) node by means of an OTFS signal, an OTFS transmitting device, an OTFS receiving device, an OTFS communication system, an OTFS transmitting device tester, an OTFS receiving device tester, and an OTFS communication system tester, in which resource utilization can be increased in a particularly efficient and reliable manner.

[0008] This object is solved by the features of the present application of the OTFS communication method for communicating between a transmitting (TX) node and a receiving (RX) node by means of an OTFS signal, the OTFS transmitting device, the OTFS receiving device, and the OTFS communication system, the OTFS transmitting device tester, the OTFS receiving device tester, and the OTFS communication system tester. The present application contains further improvements.

[0009] According to a first aspect of the present application, an OTFS communication method for communicating between a transmitting (TX) node and a receiving (RX) node by means of an orthogonal time frequency space (OTFS) signal is provided. The OTFS communication method comprises the following steps: transmitting an OTFS reference signal in an Nth time slot of the OTFS signal, wherein N is a first natural number; receiving the OTFS signal; and processing the Nth time slot up to an (N+M-1)th time slot of the respective received OTFS signal using the OTFS reference signal, wherein M is a second natural number being greater than 1.

[0010] Advantageously, resource utilization can be increased in a particularly efficient and reliable manner. Further advantageously, reference signal overhead can be significantly reduced in a particularly efficient manner.

[0011] According to an implementation form of the first aspect of the present application, the TX node comprises or is a user equipment. Additionally or alternatively, the RX node comprises or is a base station. Advantageously, the OTFS communication method can be flexibly adapted to many different mobile communication applications, for example.

[0012] According to an implementation form of the first aspect of the application, processing the Nth time slot until the (N+M-1)th time slot comprises or is demodulating the Nth time slot until the (N+M-1)th time slot. Advantageously, for example, efficiency can be further improved.

[0013] According to an implementation form of the first aspect of the application, the OTFS communication method further comprises the step of determining M based on a measurement, in particular a measurement by the RX node. Advantageously, for example, resource utilization can be further improved.

[0014] According to an implementation form of the first aspect of the application, the measurement comprises or is a measurement on a communication channel quality and / or a communication channel noise. Advantageously, for example, the reduction of reference signal overhead can be optimized based on environmental conditions.

[0015] According to an implementation form of the first aspect of the application, the OTFS communication method further comprises the step of defining M based on an implementation, in particular an implementation of a mobile network operator (MNO). Advantageously, for example, complexity can be reduced, thereby improving efficiency.

[0016] According to an implementation form of the first aspect of the application, M is between 2 and 10, preferably between 3 and 9, more preferably between 4 and 8, most preferably between 4 and 7. Advantageously, for example, efficiency can be further improved.

[0017] According to an implementation form of the first aspect of the application, M is semi-static or dynamic. Advantageously, for example, inefficiencies can be further reduced.

[0018] According to an implementation form of the first aspect of the application, the OTFS communication method further comprises the step of changing N and / or M and / or the OTFS reference signal based on a respective control message, in particular a radio resource control (RRC) message, and / or changing N and / or M and / or the OTFS reference signal between different transmissions. Advantageously, for example, resource utilization can be further improved.

[0019] According to a second aspect of the application, an OTFS transmitting device is provided, the OTFS transmitting device being configured to transmit an OTFS reference signal in an Nth time slot of an OTFS signal, wherein N is a first natural number, and wherein the OTFS reference signal is valid for the Nth time slot until an (N+M-1)th time slot of the OTFS signal, wherein M is a second natural number greater than 1.

[0020] Advantageously, resource utilization can be improved in a particularly efficient and reliable manner. Further advantageously, reference signal overhead can be significantly reduced in a particularly efficient manner.

[0021] According to a third aspect of the present application, an OTFS receiving device is provided, the OTFS receiving device being configured to receive an OTFS signal and to process an Nth time slot of the OTFS signal using an OTFS reference signal transmitted in the Nth time slot of the OTFS signal, wherein N is a first natural number and M is a second natural number greater than one.

[0022] Advantageously, resource utilization can be increased in a particularly effective and reliable way. Further advantageously, reference signal overhead can be significantly reduced in a particularly effective way.

[0023] According to a fourth aspect of the present application, an OTFS communication system is provided, the OTFS communication system comprising an OTFS transmitting device, in particular an OTFS transmitting device according to the second aspect of the present application, and an OTFS receiving device, in particular an OTFS receiving device according to the third aspect of the present application. In this case, the OTFS transmitting device is configured to transmit an OTFS reference signal in an Nth time slot of an OTFS signal, wherein N is a first natural number. Further, the OTFS receiving device is configured to receive the OTFS signal. Further, the OTFS receiving device is configured to process the Nth time slot up to an (N+M-1)th time slot of the respective received OTFS signal using the OTFS reference signal, wherein M is a second natural number greater than one.

[0024] Advantageously, resource utilization can be increased in a particularly effective and reliable way. Further advantageously, reference signal overhead can be significantly reduced in a particularly effective way.

[0025] According to a fifth aspect of the present application, an OTFS transmitting device tester is provided, the OTFS transmitting device tester being configured to vary a communication channel property, in particular a communication channel quality and / or a communication channel noise, with respect to an OTFS signal, wherein an OTFS reference signal, in particular transmitted by an OTFS transmitting device, is transmitted in an Nth time slot of the OTFS signal, wherein N is a first natural number, and wherein the OTFS reference signal is valid for the Nth time slot up to an (N+M-1)th time slot of the OTFS signal, wherein M is a second natural number greater than one, and to monitor a variation of M.

[0026] Advantageously, an efficient and reliable increase of resource utilization, in particular in the sense of a significant reduction of reference signal overhead, can be effectively verified.

[0027] According to a sixth aspect of the present application, an OTFS receiving device tester is provided, the OTFS receiving device tester being configured to change a communication channel property, in particular a communication channel quality and / or a communication channel noise, with respect to a received OTFS signal, in particular a OTFS signal received by an OTFS receiving device, wherein an Nth time slot of the OTFS signal is processed using, in particular by the OTFS receiving device, an OTFS reference signal transmitted in the Nth time slot of the OTFS signal up to an (N+M-1)th time slot of the OTFS signal, wherein N is a first natural number and wherein M is a second natural number greater than 1 ; and to monitor a change of M.

[0028] Advantageously, an efficient and reliable resource utilization increase can be effectively verified, in particular in the sense of a significant reduction of reference signal overhead.

[0029] According to a seventh aspect of the present application, an OTFS communication system tester for testing an OTFS communication system according to the fourth aspect of the present application is provided, the OTFS communication system tester being configured to change a communication channel property, in particular a communication channel quality and / or a communication channel noise, with respect to an OTFS signal and to monitor a change of M.

[0030] Advantageously, an efficient and reliable resource utilization increase can be effectively verified, in particular in the sense of a significant reduction of reference signal overhead. BRIEF DESCRIPTION OF DRAWINGS

[0031] Example embodiments of the present application will now be further explained by way of example only, and without limitation, with reference to the accompanying drawings. In the drawings:

[0032] Figure 1 a flow chart illustrating an embodiment of an OTFS communication method is shown;

[0033] Figure 2 a block diagram illustrating an embodiment of an OTFS communication system having an OTFS transmitting device and an OTFS receiving device is shown;

[0034] Figure 3 a block diagram illustrating an embodiment of an OTFS communication system tester testing a system according to Figure 2 a block diagram illustrating an embodiment of an OTFS communication system tester testing a system according to

[0035] Figure 4 an exemplary OTFS signal having a reduced reference signal overhead is shown. DETAILED DESCRIPTION

[0036] Reference is made to Figure 1Fig. 1 shows a flowchart illustrating an embodiment of an OTFS communication method for communicating by means of an Orthogonal Time Frequency Space, OTFS, signal between a transmitting, TX, node and a receiving, RX, node.

[0037] According to the OTFS communication method Figure 1 The first step 101 comprises exemplarily transmitting, by the TX node, an OTFS reference signal in an Nth time slot of an OTFS signal, wherein N is a first natural number. The second step 102 comprises exemplarily receiving, by the RX node, the OTFS signal. The third step 103 comprises exemplarily processing, by the RX node, the Nth time slot up to an (N+M-1)th time slot of the respective received OTFS signal using the OTFS reference signal, wherein M is a second natural number greater than 1.

[0038] With respect to the TX node, it is noted that it can be particularly advantageous if the TX node comprises or is a user equipment. Additionally or alternatively, with respect to the RX node, it is noted that it can be particularly advantageous if the RX node comprises or is a base station.

[0039] It is further noted that it can be particularly advantageous if the above-mentioned processing the Nth time slot up to the (N+M-1)th time slot comprises or is demodulating the Nth time slot up to the (N+M-1)th time slot. Thus, the above-mentioned third step 103 can be replaced by the following step: exemplarily demodulating, by the RX node, the Nth time slot up to the (N+M-1)th time slot of the respective received OTFS signal using the OTFS reference signal, wherein M is a second natural number greater than 1.

[0040] Further, it is particularly advantageous if the OTFS communication method further comprises the step of determining M based on a measurement, in particular a measurement by the RX node. It is noted that the OTFS communication method can alternatively comprise the step of determining M based on a measurement, in particular a measurement by the TX node and / or the RX node, exemplarily preferably a measurement by the TX node together with the RX node in the sense of a complementary measurement.

[0041] With respect to the above-mentioned measurement, in particular a measurement by the RX node, or the TX node and / or the RX node, it can be particularly advantageous if the measurement comprises or is a measurement with respect to a communication channel quality and / or a communication channel noise.

[0042] It is further noted that it can be particularly advantageous if the OTFS communication method further comprises the step of defining M based on an implementation, in particular an implementation of a Mobile Network Operator, MNO. The implementation can comprise or be a predefined value of M.

[0043] Furthermore, it can be particularly advantageous if M is between 2 and 10, preferably between 3 and 9, more preferably between 4 and 8, most preferably between 4 and 7. Additionally or alternatively, it can be particularly advantageous if M is semi-static or dynamic.

[0044] Especially in case of semi-static M, it is noted that it can be particularly advantageous if the OTFS communication method further comprises the step of changing N and / or M and / or the OTFS reference signal based on a respective control message, in particular a Radio Resource Control (RRC) message.

[0045] Additionally or alternatively, especially in case of dynamic M, it is noted that it can be particularly advantageous if the OTFS communication method further comprises the step of changing N and / or M and / or the OTFS reference signal between different transmissions.

[0046] With regard to the above-mentioned term "between different transmissions", it is noted that the term "transmission" can particularly be understood as a transmission of time slots N to N+M-1 of an OTFS signal.

[0047] Now, referring to Figure 2 a block diagram of an embodiment of an OTFS communication system 13 is depicted. The OTFS communication system 13 comprises an OTFS transmitting device (OTFS TX) 11 (e.g. the above-mentioned TX node) and an OTFS receiving device (OTFS RX) 12 (e.g. the above-mentioned RX node).

[0048] In this case, the OTFS transmitting device 11 is configured to transmit an OTFS reference signal in a Nth time slot of an OTFS signal, wherein N is a first natural number. Furthermore, the OTFS receiving device 12 is configured to receive the OTFS signal. Moreover, the OTFS receiving device 12 is configured to process the Nth time slot up to a (N+M-1)th time slot of a respective received OTFS signal using the OTFS reference signal, wherein M is a second natural number greater than 1.

[0049] It is noted that it can be particularly advantageous if the above-mentioned processing the Nth time slot up to the (N+M-1)th time slot comprises or is demodulating the Nth time slot up to the (N+M-1)th time slot. Thus, the OTFS receiving device 12 can be configured to demodulate the Nth time slot up to the (N+M-1)th time slot of a respective received OTFS signal using the OTFS reference signal, wherein M is a second natural number greater than 1.

[0050] Furthermore, it can be particularly advantageous if the OTFS transmitting device 11 and / or the OTFS receiving device 12 is configured to determine M based on a measurement, in particular a measurement by the OTFS transmitting device 11 and / or the OTFS receiving device 12, exemplarily preferably a measurement by the OTFS transmitting device 11 together with the OTFS receiving device 12 in the sense of a complementary measurement.

[0051] With respect to the above-mentioned measurement, in particular a measurement by the OTFS transmitting device 11 and / or the OTFS receiving device 12, it can be particularly advantageous if said measurement comprises or is a measurement with respect to a communication channel quality and / or a communication channel noise.

[0052] It is further noted that it can be particularly advantageous if the OTFS transmitting device 11 and / or the OTFS receiving device 12 is configured to allow defining M based on an implementation, in particular an implementation of a mobile network operator (MNO). Said implementation can comprise or be a predefined value for M.

[0053] Furthermore, it can be particularly advantageous if M is between 2 and 10, preferably between 3 and 9, more preferably between 4 and 8, most preferably between 4 and 7. Additionally or alternatively, it can be particularly advantageous if M is semi-static or dynamic.

[0054] In particular in case of a semi-static M, it is noted that it can be particularly advantageous if the OTFS transmitting device 11 and / or the OTFS receiving device 12 is configured to change N and / or M and / or the OTFS reference signal based on a respective control message, in particular a radio resource control (RRC) message.

[0055] Additionally or alternatively, in particular in case of a dynamic M, it is noted that it can be particularly advantageous if the OTFS transmitting device 11 and / or the OTFS receiving device 12 is configured to change N and / or M and / or the OTFS reference signal between different transmissions.

[0056] With respect to the above-mentioned term “between different transmissions”, it is noted that “transmission” of said term can in particular be understood as a transmission of a slot N to N+M-1 of an OTFS signal.

[0057] With respect to Figure 2 As mentioned above, said Figure 2 One embodiment of an OTFS transmitting device, namely the OTFS transmitting device 11, and one embodiment of an OTFS receiving device, namely the OTFS receiving device 12, are further shown.

[0058] With regard to the OTFS transmitting device 11, in particular taking into account the configuration of the OTFS communication system 13, it is noted that the OTFS transmitting device 11 is exemplarily configured to transmit an OTFS reference signal in an Nth time slot of an OTFS signal, wherein N is a first natural number, and wherein the OTFS reference signal is valid for the Nth time slot until an (N+M-1)th time slot of the OTFS signal, wherein M is a second natural number being greater than 1.

[0059] With regard to the OTFS receiving device 12, in particular taking into account the configuration of the OTFS communication system 13, it is noted that the OTFS receiving device 12 is exemplarily configured to receive an OTFS signal and to process, in particular to demodulate, the Nth time slot until the (N+M-1)th time slot of the OTFS signal using the OTFS reference signal transmitted in the Nth time slot of the OTFS signal, wherein N is a first natural number, and wherein M is a second natural number being greater than 1.

[0060] In particular, in order to verify that the OTFS communication system 13 improves the resource utilization or reduces the reference signal overhead, Figure 2 Figure 3 An embodiment of an OTFS transmitting device tester (TX tester) 21 is shown, which is configured to change a communication channel property, in particular a communication channel quality and / or a communication channel noise, with regard to an OTFS signal, and to monitor a change of M. Exemplarily, an OTFS reference signal is transmitted by the OTFS transmitting device 11 in an Nth time slot of the OTFS signal, wherein N is a first natural number, and wherein the OTFS reference signal is valid for the Nth time slot until an (N+M-1)th time slot of the OTFS signal, wherein M is a second natural number being greater than 1.

[0061] Thus, the OTFS transmitting device tester 21 is exemplarily configured to change a communication channel property, in particular a communication channel quality and / or a communication channel noise, with regard to a communication channel between the OTFS transmitting device 11 and the OTFS receiving device 12, and to monitor a change of M, in particular a change of M caused by the change of the communication channel property or the communication channel quality and / or the communication channel noise, exemplarily for the OTFS transmitting device 11.

[0062] In addition thereto, the OTFS transmitting device 11 is exemplarily configured to transmit an OTFS reference signal in an Nth time slot of an OTFS signal, wherein N is a first natural number, and wherein the OTFS reference signal is valid for the Nth time slot until an (N+M-1)th time slot of the OTFS signal, wherein M is a second natural number being greater than 1. Figure 3 ​An embodiment of an OTFS receiver tester (RX tester) 22 is also shown, which is configured to: change the communication channel characteristics, particularly the communication channel quality and / or communication channel noise, with respect to an OTFS signal received exemplary by an OTFS receiver 12, and monitor changes in M, wherein the OTFS receiver 12 exemplary processes, particularly demodulates, the OTFS reference signal transmitted in the Nth time slot of the OTFS signal up to the (N+M-1)th time slot of the OTFS signal using an OTFS reference signal transmitted in the Nth time slot of the OTFS signal, wherein N is a first natural number, and wherein M is a second natural number greater than 1.

[0063] Therefore, the OTFS receiver tester 22 is exemplarily configured to change the communication channel characteristics, particularly the communication channel quality and / or communication channel noise, of the communication channel between the OTFS transmitter 11 and the OTFS receiver 12, and exemplarily for the receiver 12, to monitor changes in M, particularly changes caused by changes in the communication channel characteristics or communication channel quality and / or communication channel noise.

[0064] Furthermore, the Figure 3 An embodiment of an OTFS communication system tester 23 for testing an OTFS communication system 13 is also described, the OTFS communication system tester 23 being configured to change the communication channel characteristics with respect to the OTFS signal, particularly the communication channel quality and / or the communication channel noise, and to monitor changes in M.

[0065] Therefore, the OTFS communication system tester 23 is exemplarily configured to change the communication channel characteristics, particularly the communication channel quality and / or communication channel noise, of the communication channel between the OTFS transmitting device 11 and the OTFS receiving device 12, and exemplarily monitors changes in M, particularly changes in M ​​caused by changes in the communication channel characteristics or communication channel quality and / or communication channel noise, for the OTFS transmitting device 11 and / or the OTFS receiving device 12.

[0066] As from Figure 3 As can be further seen, the OTFS communication system tester 23 exemplarily includes the aforementioned OTFS transmitting device tester 21 and the aforementioned OTFS receiving device tester 22.

[0067] at last, Figure 4 An exemplary OTFS signal with reduced reference signal overhead is shown. In this case, time slots #3 to #6 of the OTFS signal are exemplarily shown in the time-frequency diagram.

[0068] As can be seen from the figure, each time slot comprises an OTFS resource grid, wherein in time slot #3 this OTFS resource grid is representatively labeled with reference sign 33. Further, each OTFS resource grid comprises data resources, wherein one of the data resources is representatively labeled with reference sign 32 in the OTFS resource grid 33 of time slot #3.

[0069] In this exemplary case, N = 3 and M = 4 apply. Thus, only time slot #3 or OTFS resource grid 33 comprises OTFS reference signals 31, in particular OTFS demodulation reference signals. Thus, the OTFS reference signals 31 transmitted in time slot #3 are used for time slots #3 to #6. In addition thereto, no reference signals are transmitted in time slots #4 to #6. In other words, all data resources of each of time slots #4 to #6 are used for data transmission, in particular for transmission of a payload.

[0070] While various embodiments of the present application have been described above, it should be understood that they have been presented by way of example only, and not limitation. Numerous changes to the disclosed embodiments can be made in accordance with the disclosure herein without departing from the spirit or scope of the application. Therefore, the breadth and scope of the present application should not be limited by any of the above described embodiments, but should be defined in accordance with the following claims and their equivalents.

[0071] While this application has been described in terms of one or more implementations, and in conjunction with specific embodiments thereof, it is to be understood that neither the description nor the application is limited to one or more implementations or to embodiments thereof. Other changes, modifications, alterations, and variations can be made in the details of the application without departing from the spirit and scope of the application as set forth in the following claims and their equivalents.

Claims

1. An OTFS communication method for communication between a transmitting TX node and a receiving RX node using orthogonal time-frequency space OTFS signals, comprising the following steps: In the Nth time slot of the OTFS signal, the (101) OTFS reference signal (31) is transmitted, where N is the first natural number; Receive (102) the OTFS signal; and The Nth time slot is processed using the OTFS reference signal (31) described in (103) up to the N+M-1th time slot of the corresponding received OTFS signal, where M is a second natural number greater than 1.

2. The OTFS communication method according to claim 1, in, The TX node includes or is a user equipment, and / or The RX node may include or be a base station.

3. The OTFS communication method according to claim 1 or 2, wherein, Processing the Nth time slot up to the N+M-1th time slot includes or demodulating the Nth time slot up to the N+M-1th time slot.

4. The OTFS communication method according to any one of claims 1 to 3, wherein, The OTFS communication method further includes the following step: determining M based on measurements, particularly measurements performed by the RX node.

5. The OTFS communication method according to claim 4, wherein, The measurements include, or are related to, the quality of the communication channel and / or the noise of the communication channel.

6. The OTFS communication method according to any one of claims 1 to 5, wherein, The OTFS communication method further includes the following steps: defining M based on the implementation method, especially the implementation method of the mobile network operator (MNO).

7. The OTFS communication method according to any one of claims 1 to 6, wherein, M is between 2 and 10, preferably between 3 and 9, more preferably between 4 and 8, and most preferably between 4 and 7.

8. The OTFS communication method according to any one of claims 1 to 7, wherein, M can be semi-static or dynamic.

9. The OTFS communication method according to any one of claims 1 to 8, wherein, The OTFS communication method further includes the following steps: Based on the corresponding control messages, especially the Radio Resource Control (RRC) messages, change N and / or M and / or the OTFS reference signal (31), and / or Change N and / or M and / or the OTFS reference signal (31) between different transmissions.

10. An OTFS transmitting device (11), the OTFS transmitting device being configured to transmit an OTFS reference signal (31) in the Nth time slot of an OTFS signal, wherein, N is a first natural number, and the OTFS reference signal is valid for the Nth time slot up to the N+M-1th time slot of the OTFS signal, where M is a second natural number greater than 1.

11. An OTFS receiving device (12), the OTFS receiving device being configured to receive an OTFS signal and to process the Nth time slot up to the N+M-1th time slot of the OTFS signal using an OTFS reference signal (31) transmitted in the Nth time slot of the OTFS signal, wherein, N is the first natural number, and M is the second natural number greater than 1.

12. An OTFS communication system (13), comprising: OTFS sending device, particularly the OTFS sending device (11) according to claim 10, and OTFS receiving device, particularly the OTFS receiving device (12) according to claim 11, The OTFS transmitting device is configured to transmit an OTFS reference signal (31) in the Nth time slot of the OTFS signal, where N is a first natural number. The OTFS receiving device is configured to receive the OTFS signal, and The OTFS receiving device is configured to use the OTFS reference signal (31) to process the Nth time slot up to the N+M-1th time slot of the corresponding received OTFS signal, where M is a second natural number greater than 1.

13. An OTFS sender tester (21), the OTFS sender tester being configured to: Modifying the communication channel characteristics of the OTFS signal, particularly the communication channel quality and / or communication channel noise, wherein, In the Nth time slot of the OTFS signal, an OTFS reference signal (31) is transmitted, particularly by an OTFS transmitting device, where N is a first natural number, and where the OTFS reference signal (31) is valid for the Nth time slot up to the (N+M-1)th time slot of the OTFS signal, where M is a second natural number greater than 1, and Monitor changes in M.

14. An OTFS receiver tester (22), the OTFS receiver tester being configured to: This involves altering the communication channel characteristics of the received OTFS signal, particularly the OTFS signal received by the OTFS receiving device, especially the communication channel quality and / or communication channel noise. The OTFS reference signal (31) transmitted in the Nth time slot of the OTFS signal is used, in particular, by the OTFS receiving device, to process the Nth time slot up to the N+M-1th time slot of the OTFS signal, where N is a first natural number, and where M is a second natural number greater than 1, and Monitor changes in M.

15. An OTFS communication system tester (23) for testing the OTFS communication system (13) according to claim 12, said OTFS communication system tester (23) being configured to: Changing the communication channel characteristics of the OTFS signal, particularly the communication channel quality and / or communication channel noise, and Monitor changes in M.

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