CN116774151A - Signal transmitting method and device - Google Patents

Abstract

The application provides a signal transmitting method and a signal transmitting device, which can enable a communication device to transmit different sequences in different periods, so that the perception performance is improved. The method comprises the following steps: the first communication device determines N sequence transmission modes including a first sequence transmission mode and transmits a first signal according to the first sequence transmission mode. Wherein the sequence transmission mode indicates a transmission order of N sequences for transmission by the first communication apparatus in N periods, N being a positive integer greater than 1. The cyclic shift amount between the transmission orders of any two adjacent sequence transmission mode indications is 1. The first sequence transmission mode is determined according to K second sequence transmission modes and N sequence transmission modes, the second sequence transmission modes are sequence transmission modes corresponding to the second communication device, and K is a positive integer.

Description

Signal transmitting method and device

The present application claims priority from the national intellectual property agency, application number 202210235295.5, application name "a perceived sequence delivery method" filed on day 11 of 2022, the entire contents of which are incorporated herein by reference.

Technical Field

The embodiment of the application relates to the field of communication, in particular to a signal sending method and device.

Background

Wireless detection and ranging (radio detection and ranging, radar) technology is currently one of the most commonly used wireless sensing technologies. The principle is as follows: the radar transmits a sensing signal to a specific space, the sensing signal is reflected after encountering a target to form an echo signal, the radar receives the echo signal, and the correlation operation is carried out on the echo signal and the sensing signal to obtain the space information of the target.

A single carrier waveform is a commonly used radar-aware waveform. When using single carrier waveforms for sensing, the radar generates single carrier sensing signals based on the sequences, the correlation properties of which are determined by the correlation properties of the sequences. In order to improve the perceived accuracy, it is often required that the radar generates a single carrier perceived signal using sequences with good autocorrelation properties. In addition, in order to reduce interference between multiple radars, it is desirable to have better cross-correlation properties between different sequences used by different radars.

However, no sequence having both perfect auto-correlation properties and perfect cross-correlation properties has been found yet. Generally, the autocorrelation property of a sequence is good, and the cross-correlation property of the sequence and other sequences is relatively poor; the cross-correlation properties of a sequence with other sequences are good, and the autocorrelation properties of the sequence are relatively poor.

Therefore, when generating a perceptual signal based on an existing sequence, it is necessary to design a reasonable signaling scheme to improve perceptual performance.

Disclosure of Invention

The application provides a signal transmitting method and a signal transmitting device, which can enable a communication device to transmit different sequences in different periods, so that the perception performance is improved.

In a first aspect, a signal transmission method is provided, which may be performed by a first communication device, or a component of the first communication device, for example, a processor, a chip, or a chip system of the first communication device, or a logic module or software capable of implementing all or part of the functions of the first communication device. The method comprises the following steps: n sequence transmission modes are determined, the first signal is transmitted according to the first sequence transmission mode, and the N sequence transmission modes comprise the first sequence transmission mode. Wherein the sequence transmission mode indicates a transmission order of N sequences for transmission by the first communication apparatus in N periods, N being a positive integer greater than 1. The cyclic shift amount between the transmission orders of any two adjacent sequence transmission mode indications is 1. The first sequence transmission mode is determined according to K second sequence transmission modes and N sequence transmission modes, the N sequence transmission modes comprise K second sequence transmission modes, the second sequence transmission modes are sequence transmission modes corresponding to the second communication device, and K is a positive integer.

Based on the above-described scheme, the first communication apparatus transmits the first signal according to a first sequence transmission mode of the N sequence transmission modes, and since the sequence transmission mode may indicate a transmission order of the N sequences, transmitting the first signal according to the first sequence transmission mode may cause the first signal to carry (or include) N different sequences. In the case that the first signal is used for sensing, when the N sequences are not perfect autocorrelation sequences, the ratio of autocorrelation sidelobes to autocorrelation peaks can be reduced, thereby improving sensing accuracy. When the N sequences are relatively poor in cross correlation, the ratio of the cross correlation result to the autocorrelation peak can be reduced, so that interference among different communication devices is reduced. In addition, the first sequence transmission mode may be determined according to at least one second sequence transmission mode corresponding to the second communication device, so that different communication devices may use different sequences in the same period, thereby further reducing interference between different communication devices. That is, the scheme provided by the application can improve the perception performance in terms of improving the perception precision or reducing the interference among different communication devices.

In one possible design, the amount of cyclic shift between the first sequence transmission mode and one of the second sequence transmission modes is greatest when K is equal to 1. Based on this possible design, the interference between the first communication apparatus and the second communication apparatus can be reduced as much as possible by selecting the first sequence transmission mode having the largest cyclic shift amount from the second sequence transmission mode.

In one possible design, when K is greater than 1, the sum of the cyclic shift amounts between the first sequence transmission mode and each of the second sequence transmission modes is maximum. Based on this possible design, the interference between the first communication device and the plurality of second communication devices can be reduced as much as possible.

In one possible design, when K is greater than 1, the cyclic shift amount between the first sequence transmission mode and the target second sequence transmission mode is the largest, and the target second sequence transmission mode is a sequence transmission mode with the strongest interference power, which corresponds to the K second sequence transmission modes.

Based on the possible design, the corresponding sequence transmission mode with the strongest interference power causes the largest interference to the first communication device, so that the first sequence transmission mode with the largest cyclic shift amount with the target second sequence transmission mode is selected, the interference degree can be reduced as much as possible, and the perception performance is improved.

In one possible design, the first signal includes N cycles of sub-signals, the sub-signals within the N th cycle being generated by an N-th sequence indicated by the first sequence transmission mode, n=0, 1.

In one possible design, the N sequences are of a first type, the nth sequence comprising P repeated sequences of the first type, P being a positive integer greater than 1.

Based on the possible design, when the first type sequence has good periodic autocorrelation property, the correlation operation performed on the first signal and the echo signal of the first signal can be the periodic autocorrelation operation, so that the perfect or good periodic autocorrelation property of the first type sequence is reasonably utilized, and the perception performance is further improved.

In one possible design, the N sequences are second class sequences, the nth sequence includes P repeated second class sequences, a transmission interval between the P repeated second class sequences is greater than or equal to a duration occupied by transmitting the second class sequences, and P is a positive integer greater than 1.

Based on the possible design, when the second type sequence has better aperiodic autocorrelation property, the correlation operation performed on the first signal and the echo signal of the first signal can be the aperiodic autocorrelation operation, so that the perfect or better aperiodic autocorrelation property of the first type sequence is reasonably utilized, and the perception performance is further improved.

In one possible design, before transmitting the first signal according to the first sequence transmission mode, the method further includes: and receiving the first sequence sent by the second communication device, and determining a second sequence sending mode according to the first sequence. Wherein the first sequence is one of the N sequences. The first sequence of the second sequence transmission mode indication is the first sequence.

In one possible design, receiving a first sequence transmitted by a second communication device includes: and monitoring a sequence sent by the second communication device according to the first period, wherein the first sequence is the sequence monitored in the first period. Wherein the first period is greater than or equal to a transmission duration of the first signal. The first period is the interval between two adjacent listens.

In one possible design, the second sequence transmission mode is a sequence transmission mode corresponding to the second communication device, including: the second sequence transmission mode is a sequence transmission mode used by the second communication device; alternatively, the second sequence transmission mode is a sequence transmission mode in which the sequence transmission mode used by the second communication apparatus is cyclically shifted.

In one possible design, the method further comprises: and receiving an echo signal of the first signal, performing autocorrelation operation according to the echo signal and the first signal, and determining the distance between the first communication device and the target object according to the result of the autocorrelation operation.

In one possible design, the first communication device is a radar, or the first communication device is a terminal device or a network device with radar functionality.

In one possible design, the first signal is a signal for radar ranging.

In one possible design, the N sequences include one of the following: an M sequence, a Gold sequence, a golay complementary pair GCP sequence, or an ipatv sequence.

In a second aspect, a communication device is provided for implementing the various methods described above. The communication device may be the first communication device or a device comprised in the first communication device, such as a chip. The communication device comprises corresponding modules, units or means (means) for realizing the method, and the modules, units or means can be realized by hardware, software or realized by executing corresponding software by hardware. The hardware or software includes one or more modules or units corresponding to the functions described above.

In some possible designs, the communication device may include a processing module and include a transceiver module. The transceiver module, which may also be referred to as a transceiver unit, is configured to implement the transmitting and/or receiving functions of any of the above aspects and any possible implementation thereof. The transceiver module may be formed by a transceiver circuit, transceiver or communication interface. The processing module may be configured to implement the processing functions of any of the aspects described above and any possible implementation thereof.

In some possible designs, the transceiver module includes a transmitting module and a receiving module for implementing the transmitting and receiving functions in any of the above aspects and any possible implementation thereof, respectively.

In a third aspect, there is provided a communication apparatus comprising: a processor and a memory; the memory is configured to store computer instructions that, when executed by the processor, cause the communication device to perform the method of any of the above aspects. The communication device may be a first communication device or a device comprised in the first communication device, such as a chip.

In a fourth aspect, there is provided a communication apparatus comprising: a processor and a communication interface; the communication interface is used for communicating with a module outside the communication device; the processor is configured to execute a computer program or instructions to cause the communication device to perform the method of any of the above aspects. The communication device may be a first communication device or a device comprised in the first communication device, such as a chip.

In a fifth aspect, there is provided a communication apparatus comprising: interface circuitry and a processor, the interface circuitry being code/data read-write interface circuitry for receiving computer-executable instructions (the computer-executable instructions being stored in memory, possibly read directly from the memory, or possibly via other devices) and transmitting to the processor; the processor is configured to execute computer-executable instructions to cause the communication device to perform the method of any of the above aspects. The communication device may be a first communication device or a device comprised in the first communication device, such as a chip.

In a sixth aspect, there is provided a communication apparatus comprising: at least one processor; the processor is configured to execute a computer program or instructions to cause the communication device to perform the method of any of the above aspects. The communication device may be a first communication device or a device comprised in the first communication device, such as a chip.

In some possible designs, the communication device includes a memory for holding necessary program instructions and data. The memory may be coupled to the processor or may be separate from the processor.

In some possible designs, the communication device may be a chip or a system-on-chip. When the device is a chip system, the device can be formed by a chip, and can also comprise the chip and other discrete devices.

In a seventh aspect, there is provided a computer readable storage medium having instructions stored therein which, when run on a communications device, cause the communications device to perform the method of any of the above aspects.

In an eighth aspect, there is provided a computer program product comprising instructions which, when run on a communications apparatus, cause the communications apparatus to perform the method of any of the above aspects.

It will be appreciated that when the communication device provided in any one of the second to eighth aspects is a chip, the above-mentioned transmitting action/function may be understood as outputting information, and the above-mentioned receiving action/function may be understood as inputting information.

The technical effects of any one of the second to eighth aspects may be referred to the technical effects of the different designs in the first aspect, and are not described herein.

Drawings

Fig. 1 is a schematic diagram of a single carrier sensing signal according to the present application;

FIG. 2 is a schematic diagram of interference among a plurality of radars according to the present application;

fig. 3 is a timing diagram of a repeated transmission sequence S according to the present application;

FIG. 4a is a schematic diagram of a periodic autocorrelation result of a Gold sequence according to the present application;

FIG. 4b is a schematic diagram of the periodic autocorrelation result of another Gold sequence provided by the present application;

FIG. 4c is a schematic diagram of a periodic autocorrelation result of another Gold sequence provided by the present application;

FIG. 5a is a schematic diagram of a periodic cross-correlation result of Gold sequences according to the present application;

FIG. 5b is a schematic diagram of a periodic cross-correlation result of another Gold sequence according to the present application;

FIG. 5c is a schematic diagram of a periodic cross-correlation result of another Gold sequence according to the present application;

fig. 6 is a schematic structural diagram of a communication system according to the present application;

fig. 7a is a schematic structural diagram of a communication device according to the present application;

fig. 7b is a schematic structural diagram of another communication device according to the present application;

fig. 7c is a schematic structural diagram of another communication device according to the present application;

fig. 8 is a schematic flow chart of a signal sending method provided by the application;

FIG. 9 is a schematic diagram of a listening period according to the present application;

fig. 10a is a schematic diagram of a sequence transmission duration provided in the present application;

fig. 10b is a schematic diagram of another sequence transmission duration provided in the present application;

FIG. 11a is a schematic diagram of a sequence repeat transmission provided by the present application;

FIG. 11b is a schematic diagram of another sequence repeat transmission provided by the present application;

fig. 12 is a flow chart of another signal transmission method according to the present application;

fig. 13a is a schematic diagram of GCP sequence repeat transmission according to the present application;

fig. 13b is a schematic diagram of another GCP seed sequence repeat transmission provided by the present application;

fig. 14 is a schematic structural diagram of a first communication device according to the present application.

Detailed Description

In the description of the present application, unless otherwise indicated, "/" means that the objects associated in tandem are in a "or" relationship, e.g., A/B may represent A or B; the "and/or" in the present application is merely an association relationship describing the association object, and indicates that three relationships may exist, for example, a and/or B may indicate: there are three cases, a alone, a and B together, and B alone, wherein a, B may be singular or plural.

In the description of the present application, unless otherwise indicated, "a plurality" means two or more than two. "at least one of" or the like means any combination of these items, including any combination of single item(s) or plural items(s). For example, at least one (one) of a, b, or c may represent: a, b, c, a and b, a and c, b and c, a and b and c, wherein a, b and c can be single or multiple.

In addition, in order to facilitate the clear description of the technical solution of the embodiments of the present application, in the embodiments of the present application, the words "first", "second", etc. are used to distinguish the same item or similar items having substantially the same function and effect. It will be appreciated by those of skill in the art that the words "first," "second," and the like do not limit the amount and order of execution, and that the words "first," "second," and the like do not necessarily differ.

In embodiments of the application, words such as "exemplary" or "such as" are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "e.g." in an embodiment should not be taken as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete fashion that may be readily understood.

It is appreciated that reference throughout this specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Thus, the various embodiments are not necessarily all referring to the same embodiment throughout the specification. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. It should be understood that, in various embodiments of the present application, the sequence number of each process does not mean that the execution sequence of each process should be determined by the function and the internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

It can be appreciated that some optional features of the embodiments of the present application may be implemented independently in some scenarios, independent of other features, such as the scheme on which they are currently based, to solve corresponding technical problems, achieve corresponding effects, or may be combined with other features according to requirements in some scenarios. Accordingly, the device provided in the embodiment of the present application may also implement these features or functions accordingly, which will not be described herein.

In the present application, the same or similar parts between the embodiments may be referred to each other unless specifically stated otherwise. In the various embodiments of the application, if there is no specific description or logical conflict, terms and/or descriptions between the various embodiments will be consistent and will reference each other. The embodiments of the present application described below do not limit the scope of the present application.

In order to facilitate understanding of the technical solutions of the embodiments of the present application, a brief description of the related art of the present application is given below.

(1) Sequence: a sequence may include a plurality of discrete data, one of which may be referred to as an element of the sequence. Sequences can be generally classified into binary sequences (element values of 1 or-1), ternary sequences (element values of 1, -1, or 0), and multiple sequences (element values greater than three) according to the value of the element.

(2) Correlation operation: correlation operation refers to multiplication and addition of corresponding elements of two sequences. For example, assume the sequence a= [ a ] ₁ ,a ₂ ,a ₃ ]Sequence b= [ b ] ₁ ,b ₂ ,b ₃ ]Then the correlation of the two is: a, a ₁ ×b ₁ +a ₂ ×b ₂ +a ₃ ×b ₃ 。

(3) Cycle correlation operation: when performing correlation operation of sequences, correlation values of two sequences are calculated based on relative cyclic shift between the sequences. If the sequence length is L, then the relative cyclic shift between sequences may be: -l+1, -l+2, …, -1,0,1, …, L-2, L-1 total 2L-1 cases, so the periodic correlation operation of the sequence total 2L-1 values.

For example, assume the sequence a= [ a ] ₁ ,a ₂ ,a ₃ ]Sequence b= [ b ] ₁ ,b ₂ ,b ₃ ]Then the relative cyclic shift between the two is totally-2, -1,0,1,2, and correspondingly, there are five results of the cycle correlation operation of the two:

when the relative cyclic displacement is-2, the following situation is corresponded:

a ₂ ,a ₃ ,a ₁

b ₁ ,b ₂ ,b ₃

at this time, the cycle correlation result is: a, a ₂ ×b ₁ +a ₃ ×b ₂ +a ₁ ×b ₃ ；

When the relative cyclic displacement is-1, the following situation is corresponded:

a ₃ ,a ₁ ,a ₂

b ₁ ,b ₂ ,b ₃

at this time, the cycle correlation result is: a, a ₃ ×b ₁ +a ₁ ×b ₂ +a ₂ ×b ₃ ；

When the relative cyclic displacement is 0, the following situation is corresponded:

a ₁ ,a ₂ ,a ₃

b ₁ ,b ₂ ,b ₃

at this time, the cycle correlation result is: a, a ₁ ×b ₁ +a ₂ ×b ₂ +a ₃ ×b ₃ ；

When the relative cyclic displacement is 1, the following situation is corresponded:

a ₂ ,a ₃ ,a ₁

b ₁ ,b ₂ ,b ₃

at this time, the cycle correlation result is: a, a ₂ ×b ₁ +a ₃ ×b ₂ +a ₁ ×b ₃ ；

When the relative cyclic displacement is 2, the following situation is corresponded:

a ₃ ,a ₁ ,a ₂

b ₁ ,b ₂ ,b ₃

at this time, the cycle correlation result is: a, a ₃ ×b ₁ +a ₁ ×b ₂ +a ₂ ×b ₃ 。

(4) Aperiodic correlation operation: when the correlation operation of the sequences is carried out, the correlation value of the two sequence coincidence elements is calculated based on the relative displacement between the sequences. If the sequence length is L, then the relative displacement between the sequences may be: -l+1, -l+2, …, -1,0,1, …, L-2, L-1 total 2L-1 cases, so that the aperiodic correlation operation of the sequence total 2L-1 values.

For example, assume the sequence a= [ a ] ₁ ,a ₂ ,a ₃ ]Sequence b= [ b ] ₁ ,b ₂ ,b ₃ ]Then the relative cyclic displacement between the two is-2, -1,0,1 2, there are five possibilities, corresponding to the two, of which there are five results:

when the relative displacement is-2, the following situation is corresponded:

a ₁ ,a ₂ ,a ₃

b ₁ ,b ₂ ,b ₃

at this time, the aperiodic correlation result is: a, a ₁ ×b ₃ ；

When the relative displacement is-1, the following situation is corresponded:

a ₁ ,a ₂ ,a ₃

b ₁ ,b ₂ ,b ₃

at this time, the aperiodic correlation result is: a, a ₁ ×b ₂ +a ₂ ×b ₃ ；

When the relative displacement is 0, the following situation is corresponded:

a ₁ ,a ₂ ,a ₃

b ₁ ,b ₂ ,b ₃

at this time, the aperiodic correlation result is: a, a ₁ ×b ₁ +a ₂ ×b ₂ +a ₃ ×b ₃ ；

When the relative displacement is 1, the following situation is corresponded:

a ₁ ,a ₂ ,a ₃

b ₁ ,b ₂ ,b ₃

at this time, the aperiodic correlation result is: a, a ₂ ×b ₁ +a ₃ ×b ₂ ；

When the relative displacement is 2, the following situation is corresponded:

a ₁ ,a ₂ ,a ₃

b ₁ ,b ₂ ,b ₃

at this time, the aperiodic correlation result is: a, a ₃ ×b ₁ 。

It can be understood that, for two sequences, if one of the sequences is cyclically shifted at the same time during the relative displacement, so that the number of the coincident elements of the two sequences is always equal to the sequence length, the correlation operation of the two sequences is a periodic correlation operation. If no cyclic shift occurs during the relative displacement, that is, the number of the coincident elements of the two sequences decreases with the positive two of the relative displacement, the correlation operation of the two sequences is an aperiodic correlation operation.

(5) Periodic autocorrelation: if the two sequences are identical, the periodic correlation operation between them is called periodic autocorrelation.

(6) Periodic cross-correlation: if the two sequences are different, then the periodic correlation operation between them is called periodic cross correlation.

(7) Aperiodic autocorrelation: if the two sequences are identical, the aperiodic correlation operation between them is called aperiodic autocorrelation.

(8) Non-periodic cross-correlation: if the two sequences are different, then the aperiodic correlation operation between them is called aperiodic cross correlation.

(9) Perfect periodic autocorrelation: if the result of the periodic autocorrelation of the sequence is 0 at a shift other than 0, the sequence has perfect periodic autocorrelation properties. If the other shifts are not 0 in addition to the 0 shift, but the values at the other shifts are very small compared to the peak at the 0 shift, the sequence has better periodic autocorrelation properties.

(10) Perfect periodic cross-correlation: if the result of the periodic cross-correlation of two sequences is 0 at all displacements, then the two sequences have perfect periodic cross-correlation properties, or are said to be mutually orthogonal. If the periodic cross-correlation result of two sequences remains small at all displacements, then the two sequences are said to have good periodic cross-correlation properties.

(11) Perfect aperiodic autocorrelation: if the result of the aperiodic autocorrelation of the sequence is 0 at a shift other than 0, the sequence has perfect aperiodic autocorrelation properties. If the other shifts are not 0 in addition to the 0 shift, but the values at the other shifts are very small compared to the peak at the 0 shift, the sequence has better aperiodic autocorrelation properties.

(12) Perfect aperiodic cross-correlation: if the result of the aperiodic cross-correlation of two sequences is 0 at all displacements, then the two sequences have perfect aperiodic cross-correlation properties, or are said to be orthogonal to each other. If the result of the aperiodic cross-correlation of two sequences remains small at all displacements, then the two sequences are said to have good aperiodic cross-correlation properties.

(13) Periodic cross correlation peak: for two sequences of length L, the maximum of the absolute values of the 2L-1 periodic cross-correlation results of the two is called the periodic cross-correlation peak.

(14) Non-periodic cross correlation peaks: for two sequences of length L, the largest of the absolute values of the 2L-1 aperiodic cross-correlation results for both is called the aperiodic cross-correlation peak.

In the present application, when specific sequences are not specified, periodic autocorrelation or aperiodic autocorrelation is collectively referred to as autocorrelation, and periodic cross-correlation or aperiodic cross-correlation is collectively referred to as cross-correlation. In addition, for the autocorrelation, the present application refers to the autocorrelation result when the displacement is not 0 as an autocorrelation side lobe.

Currently, radars can generate single carrier sense signals by means of phase modulation. For example, as shown in fig. 1, the radar may send pulse signals with corresponding phases according to elements in the sequence, for example, when an element in the sequence is 1, a positive pulse is sent, when an element in the sequence is-1, a negative pulse is sent, and the pulses corresponding to each element in the sequence are overlapped to obtain a wide pulse. The pulse may be a rectangular pulse, a gaussian pulse, a root raised cosine pulse, etc., without limitation. Based on the generation mode, the shapes of the pulses corresponding to different sequence elements are the same, so that the correlation property of the single carrier sensing signal is determined by the sequence.

The radar can send a sensing signal and receive an echo signal of the sensing signal, perform autocorrelation calculation on the sensing signal and the echo signal, and determine information such as the distance of a target by searching the position where the maximum autocorrelation peak appears. If the autocorrelation properties of the sequence used in generating the perceptual signal are poor, autocorrelation sidelobes may be large, resulting in a decrease in perceptual accuracy. Therefore, in order to improve the perceived accuracy, the sequences are required to have good autocorrelation properties.

In addition, when there are a plurality of radars to sense, mutual interference exists between the radars. Illustratively, as shown in fig. 2, the sensing signal 1 sent by the radar 1 interferes with the radar 2, and the echo of the sensing signal 1 reflected by the target in the direction of the radar 2 also interferes with the radar 2. Similarly, the sensing signal 2 sent by the radar 2 interferes with the radar 1, and the echo of the sensing signal 2 reflected by the target in the direction of the radar 1 also interferes with the radar 1.

In order to reduce interference between multiple radars, different radars typically use different sequences to generate the perceived signal, at which time the nature of the cross-correlation between the different sequences will determine the level of the interfering signal. Therefore, in order to further reduce the interference between radars, it is required to have better cross-correlation properties between different sequences used by different radars.

However, no sequence having both perfect auto-correlation properties and perfect cross-correlation properties has been found yet. Generally, the autocorrelation property of a sequence is good, and the cross-correlation property of the sequence and other sequences is relatively poor; alternatively, the cross-correlation properties of a sequence with other sequences are better, and the autocorrelation properties of the sequence are relatively worse.

For example, for commonly used M-sequences, ipatv sequences, gold sequences, and golay complementary pair (golay complementary pairs, GCP) sequences, etc., the M-sequences, ipatv sequences, and GCP sequences have good auto-correlation properties, but relatively poor cross-correlation properties. The cross-correlation properties of Gold sequences are better, but the autocorrelation properties are relatively worse. Therefore, when generating a single carrier sensing signal using an existing sequence, a transmission mode of the sequence needs to be designed to improve sensing performance.

Wherein GCP is a two-channel sequence with perfect aperiodic autocorrelation properties, defined as: a pair of sequences x and y of code length L, which are one (pair) GCP if the sum of their non-periodic autocorrelation functions (aperiodic auto correlation function, AACF) is 0 everywhere except for the 0 shift.

In order to improve the signal-to-noise ratio (signal to noise ratio, SNR) of the receiving end, in the conventional scheme, the perceived signal generally includes a signal that is repeatedly transmitted in a plurality of periods, or the transmitting end repeatedly transmits a certain sequence in a plurality of periods. Illustratively, as shown in fig. 3, the radar transmits a signal generated according to the sequence S at each of N periods. In each period, the radar may transmit a pulse signal with a corresponding phase according to the element of the sequence S, which will be described with reference to fig. 1, and will not be described herein.

At the receiving end, the radar performs autocorrelation operation of the received signal (including echo signal and noise) and the perceived signal for N periods, respectively, obtains N autocorrelation results, and accumulates the N autocorrelation results. Because the total duration of the N periods is very small, generally in the nanosecond or microsecond order, the position of the perception target in the N periods can be considered unchanged, so that when the autocorrelation operation is performed on the N periods respectively, the positions of the maximum autocorrelation peak in each period are the same, and after the N autocorrelation results are accumulated, the maximum autocorrelation peak can be increased by N times. And because the noise is randomly distributed, the noise is not increased after accumulation, so that the SNR of the receiving end can be improved by the transmitting mode.

In the present application, the correlation operation on the signal can be also understood as: and carrying out correlation operation on the sequence generating the signal or carrying out correlation operation on the sequence carried by the signal. Transmitting a signal generated based on a sequence can also be understood as: and transmitting the sequence.

Based on the thought, for sequences with better cross-correlation properties such as Gold sequences, the self-correlation side lobes of different Gold sequences appear randomly, namely, at the same displacement, the self-correlation side lobes of different Gold sequences are different in size and positive and negative, so if signals generated based on different Gold sequences are sent in N periods, and the self-correlation results of the N periods are accumulated at a receiving end, the maximum self-correlation peak can still be increased by N times. But since the autocorrelation sidelobes occur randomly, they do not increase by a factor of N.

If signals generated based on the same Gold sequence are transmitted in N periods according to the conventional scheme, and the autocorrelation results of the N periods are accumulated at the receiving end, since the autocorrelation results in each period are the same, the autocorrelation peak and the autocorrelation side lobe after superposition are increased by N times, and compared with the signals generated based on the Gold sequence once transmitted in one period, the ratio of the autocorrelation side lobe to the autocorrelation peak is unchanged.

That is, signals generated based on different Gold sequences are transmitted in N periods, and after the autocorrelation results of the N periods are accumulated at the receiving end, the ratio of the autocorrelation sidelobes to the autocorrelation peaks becomes smaller than that of the conventional scheme.

Fig. 4a to 4c show exemplary simulation diagrams of the periodic autocorrelation results of Gold sequence 1, gold sequence 2, and Gold sequence 3, respectively. As can be seen from fig. 4a to fig. 4c, the positions (0 shift positions), the sizes of the autocorrelation peaks of the Gold sequence 1, the Gold sequence 2 and the Gold sequence 3 are equal, and the sizes and the positive and negative of the autocorrelation sidelobes at other shifts are irregular, so if the periodic autocorrelation results of the three Gold sequences are accumulated, the autocorrelation peak is increased by three times, and the autocorrelation sidelobes at other shifts are increased or reduced. As the number of Gold sequences increases, it can be considered that autocorrelation sidelobes at other shifts after accumulation tend to be unchanged according to the law of large numbers. Therefore, after the periodic autocorrelation results of the N Gold sequences are accumulated, the autocorrelation peak is increased by N times, the autocorrelation side lobe is unchanged, and the ratio of the autocorrelation side lobe to the autocorrelation peak is reduced.

In addition, for sequences with better cross-correlation properties, such as Gold sequences, the periodic cross-correlation results of two pairs of different Gold sequences can also be considered to occur randomly. Fig. 5a to 5c show, for example, the result of the periodic cross-correlation of Gold sequence 1 and Gold sequence 2, the result of the periodic cross-correlation of Gold sequence 1 and Gold sequence 3, and the result of the periodic cross-correlation of Gold sequence 2 and Gold sequence 3, respectively. As can be seen from fig. 5a to 5c, the periodic cross-correlation results for three pairs of sequences are each different.

Thus, after accumulating the periodic cross-correlation results of the three pairs of sequences, the value of the periodic cross-correlation may increase or decrease at each shift. With the increase of the number of Gold sequences, the accumulated periodic cross-correlation result can be considered to be unchanged relative to the accumulated periodic cross-correlation result according to the law of large numbers.

That is, when a plurality of radars perform sensing, each radar transmits a signal generated based on a different Gold sequence in N periods, and the period cross-correlation result is unchanged in the case of accumulating the cross-correlation results in N periods. And the autocorrelation peak is increased by N times under the scene, so that the ratio of the value of the periodic cross correlation to the autocorrelation peak can be reduced, namely the interference between radars is reduced.

If according to the conventional scheme, for example, the radar 1 transmits a signal generated based on the Gold sequence 1 in N periods, and the radar 2 transmits a signal generated based on the Gold sequence 2 in N periods, then since the sequences performing the cross-correlation operation in each period are the same (both the Gold sequence 1 and the Gold sequence 2), the cross-correlation result in N periods is added up, and then the cross-correlation result is increased by N times. Also, in this scenario, since the autocorrelation peak is also increased by N times, the ratio of the cross-correlation result to the autocorrelation peak does not change, and the interference between radars does not decrease, compared to a signal generated based on Gold sequences once transmitted in one period.

In summary, for sequences with better cross-correlation properties, such as Gold sequences, signals generated based on different Gold sequences are sent in N periods, so that the ratio of autocorrelation sidelobes to autocorrelation peaks can be reduced, the perception precision is improved, the ratio of cross-correlation results to autocorrelation peaks can be reduced, and interference among different radars is reduced.

The Gold sequence 1, gold sequence 2, and Gold sequence 3 are respectively:

gold sequence 1:1,1,1,1,1,1,1,1,1,1, -1,1,1,1,1,1, -1,1,1,1, -1,1, -1,1, -1,1,1, -1, -1,1,1,1, -1, -1, -1,1, -1,1, -1,1,1,1,1,1,1,1, -1, -1,1,1,1, -1,1, -1, -1, -1, -1, -1, -1, -1, -1,1, -1,1,1, -1,1,1,1,1, -1,1, -1, -1,1, -1, -1,1, -1,1, -1, -1, -1, -1,1,1, -1, -1, -1, -1,1,1, -1, -1, -1, -1, -1,1,1,1, -1,1, -1,1,1,1,1,1, -1, -1,1,1,1, -1,1,1,1, -1,1,1, -1, -1, -1,1, -1, -1, -1.

Gold sequence 2: -1,1,1,1,1,1, -1, -1,1,1, -1,1, -1,1, -1,1, -1,1, -1, -1,1, -1, -1,1,1,1,1, -1,1,1, -1, -1, -1, -1,1, -1,1,1,1,1, -1,1,1, -1, -1, -1,1,1,1, -1,1, -1,1, -1,1,1,1, -1, -1, -1,1,1, -1, -1,1, -1, -1, -1,1, -1,1,1,1, -1, -1,1, -1, -1,1, -1,1, -1,1,1,1,1, -1,1,1, -1, -1,1, -1,1, -1,1,1, -1,1, -1,1, -1, -1,1, -1, -1,1,1,1, -1, -1,1, -1, -1, -1, -1, -1,1, -1, -1,1, -1, -1,1, -1, -1, -1.

Gold sequence 3: -1,1,1,1,1, -1,1, -1,1,1, -1, -1, -1, -1, -1,1, -1, -1,1,1, -1, -1, -1, -1,1,1,1,1,1, -1,1, -1, -1,1, -1,1,1, -1,1, -1, -1,1, -1,1,1,1, -1,1, -1, -1,1, -1,1,1, -1, -1,1, -1, -1,1,1,1,1, -1,1,1,1, -1, -1,1,1, -1,1,1,1,1,1,1, -1,1,1,1, -1,1,1,1,1, -1,1,1, -1,1,1,1,1, -1, -1, -1, -1,1, -1, -1, -1, -1,1, -1,1, -1,1,1, -1, -1, -1,1,1,1,1, -1,1,1,1, -1, -1,1, -1, -1,1.

For sequences with fixed autocorrelation side lobes (for example, fixed absolute size of 0 or 1) such as M sequence, ipatv sequence, and GCP sequence, signals generated based on different sequences are transmitted in N periods, and the ratio of the cross correlation result with respect to the autocorrelation peak can be reduced.

Based on the analysis, the perceptual performance can be improved by transmitting signals generated based on different sequences in different periods, or transmitting different sequences in different periods. However, existing sequence transmission methods may not enable different sequences to be transmitted in different periods.

Illustratively, a Group hopping (Group hopping) and Sequence hopping (Sequence hopping) scheme is defined in the existing fifth generation (5th generation,5G) New Radio (NR) protocol to facilitate User Equipment (UE) to use different sequences in different time slots. For example, in the channel sounding reference signal (sounding reference signal, SRS) of NR, the following set of hopping schemes is employed to transmit sequences:

UE in nth _s Within a time slot, the transmitted sequence is numberedWhere c (n) is a pseudo-random sequence, which may be represented by two pseudo-random sequences x ₁ (n) and x ₂ (n) is generated as follows:

c(n)＝(x ₁ (n+1600)+x ₂ (n+1600))mod2

x ₁ (n) can be generated by: initializing x ₁ (0)＝1,x ₁ (n) =0, n=1, 2,..30. After initialization is completed, x ₁ Other results of (n) may be represented by x ₁ (n+31)＝(x ₁ (n+3)+x ₁ (n)) mod2 recurrence.

x ₂ (n) can be generated by: according to a given c _init Initializing x ₂ (n) =0, n=0, 1,2,..30, e.g.I.e. decimal c _init Represented by 31-bit binary numbers, which correspond to x in sequence from low to high ₂ (n) =0, n=0, 1,2,..30. Wherein c _init The number of the UE determines that c can be set in practical application _init Equal to the UE number.

After initialization is completed, x ₂ Other results of (n) may be represented by x ₂ (n+31)＝(x ₂ (n+3)+x ₂ (n+2)+x ₂ (n)) mod2 recurrence.

Currently, the group hopping scheme and the sequence hopping scheme in the above NR protocol are generally adaptively modified to be suitable for sequence transmission in a perceptual scenario. For example, n _s Representing time slots in NR protocol, representing nth in perceptual scenarios _s A cycle. c _init In the NR protocol, the number of the UE, the number of the radar in the perceptual scenario, etc.

In the above sequence transmission method in the NR protocol-based sensing scenario, the radar determines the sequence used in each period based on a pseudo-random sequence, and thus is essentially a random sequence selection method. Therefore, the scheme has a certain probability that the same radar uses the same sequence in different periods, and also has a certain probability that different radars use the same sequence in the same period.

Based on the above, the application provides a signal sending method, which enables the same device to send different sequences in different periods, and simultaneously enables different devices to use different sequences in the same period, thereby reducing the ratio of an autocorrelation sidelobe to an autocorrelation peak, improving the perception precision, or reducing the ratio of a cross-correlation result to the autocorrelation peak, and reducing the interference among different radars.

The technical solution of the embodiment of the present application may be used in various communication systems, which may be a third generation partnership project (3rd generation partnership project,3GPP) communication system, for example, a 5G or sixth generation (6G) mobile communication system, a Side Link (SL) system, an ultra-wideband (UWB) system, a vehicle networking (vehicle to everything, V2X) system, or a device-to-device (D2D) communication system, a machine-to-machine (machine to machine, M2M) communication system, an internet of things (internet of things, ioT), and other next generation communication systems. The communication system may also be a non-3 GPP communication system, such as a wireless local area network (wireless local area network, WLAN) system, e.g., wi-Fi, without limitation.

The technical scheme of the embodiment of the application can be applied to various communication scenes, for example, one or more of the following communication scenes: smart home, D2D, V2X, and IoT, among other communication scenarios.

The above communication system and communication scenario to which the present application is applied are merely examples, and the communication system and communication scenario to which the present application is applied are not limited thereto, and are collectively described herein, and are not repeated herein.

Referring to fig. 6, a communication system is provided in an embodiment of the present application. The communication system comprises at least two communication devices, which are illustrated in fig. 6 by way of example as comprising a first communication device and a second communication device. Wherein the communication device may transmit the signal based on the sequence.

Alternatively, the communication device may be a radar, or a terminal device or a network device having a radar function. Further, the communication system may further comprise at least two target objects, which are illustrated in fig. 6 by way of example comprising target object 1 and target object 2. The signal transmitted by the communication device may be used to perceive the target object.

Illustratively, the first communication device may transmit the perception signal 1 to perceive the target object 1, and the second communication device may transmit the perception signal 2 to perceive the target object 2. In this process, the first communication device and the second communication device may interfere with each other.

Wherein the interference of one communication device to another communication device mainly comprises two parts: one part is interference caused by direct signals of the communication device, and the other part is interference caused by perceived signals reflected by the target object. Thus, the signal actually received by a communication device is a superposition of the echo signal of that communication device and the interference signal caused by another communication device. In the solution of the application, the interference between the two communication devices is low.

Alternatively, for the first communication apparatus and the second communication apparatus in the present application, one may be a terminal device having a radar function, and the other may be a network device having a radar function; or may be terminal devices having radar functions.

Alternatively, the terminal device may be a device having a wireless transceiving function. A network device is a device that accesses a terminal device to a wireless network.

The network device may be a next generation node B (next generation node B, gnob or gNB) in a 5G system or a 6G system; or may be a transmission reception point (transmission reception point, TRP); or may be a base station in a future evolved public land mobile network (public land mobile network, PLMN), to which embodiments of the present application are not limited in detail.

A terminal device may also be called a UE, a terminal, an access terminal, a subscriber unit, a subscriber station, a Mobile Station (MS), a remote station, a remote terminal, a Mobile Terminal (MT), a user terminal, a wireless communication device, a user agent, a user equipment, or the like. The terminal device may be, for example, a wireless terminal in an IoT, V2X, D2D, M M, 5G network, 6G network, or future evolved PLMN. The terminal device may be deployed on land, including indoors or outdoors, hand-held or vehicle-mounted; can also be deployed on the water surface (such as ships, etc.); but may also be deployed in the air (e.g., on aircraft, balloon, satellite, etc.).

By way of example, the terminal device may be an unmanned aerial vehicle, an IoT device (e.g., sensor, electricity meter, water meter, etc.), a V2X device, a Station (ST) in a wireless local area network (wireless local area networks, WLAN), a cellular telephone, a cordless telephone, a session initiation protocol (session initiation protocol, SIP) phone, a wireless local loop (wireless local loop, WLL) station, a personal digital assistant (personal digital assistant, PDA) device, a handheld device with wireless communication functionality, a computing device or other processing device connected to a wireless modem, an on-board device, a wearable device (which may also be referred to as a wearable smart device), a tablet or a computer with wireless transceiver functionality, a Virtual Reality (VR) terminal, a terminal in an industrial control (industrial control), a terminal in an unmanned-drive (self-driving), a terminal in a remote medical system (smart) system (transportation safety), a terminal in a smart city (smart city) terminal, a smart to-vehicle, a vehicle-to-vehicle with communication capability of an unmanned aerial vehicle, an unmanned aerial vehicle-to a UAV 2, an unmanned aerial vehicle, or the like.

The related functions of the first communication apparatus or the second communication apparatus according to the present application may be implemented by one device, or may be implemented by a plurality of devices together, or may be implemented by one or more functional modules in one device, or may be one or more chips, or may be a System On Chip (SOC) or a chip system, where the chip system may be formed by a chip, or may include a chip and other discrete devices, and embodiments of the present application are not limited in this regard.

It will be appreciated that the above described functionality may be either a network element in a hardware device, or a software functionality running on dedicated hardware, or a combination of hardware and software, or a virtualized functionality instantiated on a platform (e.g., a cloud platform).

For example, the related functions of the first communication device or the second communication device according to the present application may be implemented by the communication device 700 in fig. 7 a. Fig. 7a is a schematic structural diagram of a communication device 700 according to an embodiment of the present application. The communication device 700 comprises one or more processors 701 and at least one communication interface (shown in fig. 7a by way of example only as comprising a communication interface 704 and one processor 701), optionally together with communication lines 702 and a memory 703.

The processor 701 may be a general purpose central processing unit (central processing unit, CPU), microprocessor, application-specific integrated circuit (ASIC), or one or more integrated circuits for controlling the execution of the program of the present application.

In a particular implementation, as one embodiment, the processor 701 may include one or more CPUs, such as CPU0 and CPU1 in FIG. 7 a.

In a particular implementation, as one embodiment, the communications apparatus 700 can include a plurality of processors. Each of these processors may be a single-core processor or a multi-core processor. The processor herein may include, but is not limited to, at least one of: a central processing unit (central processing unit, CPU), microprocessor, digital Signal Processor (DSP), microcontroller (microcontroller unit, MCU), or artificial intelligence processor, each of which may include one or more cores for executing software instructions to perform operations or processes.

The communication line 702 may be used for communication between different components included in the communication device 700.

Communication interface 704 may be used to communicate with other devices or communication networks such as ethernet, radio access network (wireless access networks, RAN), WLAN, etc. The communication interface 704 may be a device such as a transceiver, or may be an input-output interface. Alternatively, the communication interface 704 may be a transceiver circuit located in the processor 701, so as to implement signal input and signal output of the processor.

The memory 703 may be a device having a memory function. For example, but not limited to, a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a random access memory (random access memory, RAM) or other type of dynamic storage device that can store information and instructions, an electrically erasable programmable read-only memory (electrically erasable programmable read-only memory, EEPROM), a compact disc read-only memory (compact disc read-only memory) or other optical disk storage, optical disk storage (including compact discs, laser discs, optical discs, digital versatile discs, blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. The memory may be self-contained and coupled to the processor via communication line 702. The memory may also be integrated with the processor.

Alternatively, the memory 703 may be used for storing computer-executable instructions for executing the aspects of the present application, and the execution is controlled by the processor 701, thereby implementing the methods provided in the embodiments of the present application.

Alternatively, in the embodiment of the present application, the processor 701 may perform a function related to processing in a method provided in the embodiment of the present application, and the communication interface 704 is responsible for a function of communicating with other devices or communication networks in the method provided in the embodiment of the present application, which is not limited in detail herein.

Alternatively, the computer-executable instructions in the embodiments of the present application may be referred to as application program codes, which are not particularly limited in the embodiments of the present application.

In a specific implementation, as an embodiment, the communication apparatus 700 may further include an output device 705 and an input device 706. The output device 705 communicates with the processor 701 and may display information in a variety of ways. For example, the output device 705 may be a liquid crystal display (liquid crystal display, LCD), a light emitting diode (light emitting diode, LED) display device, a Cathode Ray Tube (CRT) display device, or a projector (projector), or the like. The input device 706 is in communication with the processor 701 and may receive input from a user in a variety of ways. For example, the input device 706 may be a mouse, keyboard, touch screen device, or sensing device, among others.

Taking the communication interface 704 as a transceiver, as shown in fig. 7b, another schematic structure of a communication device 700 according to an embodiment of the present application is provided, where the communication device 700 includes a processor 701 and the transceiver 704. Fig. 7b shows only the main components of the communication device 700. The communication device may further comprise a memory 703, and input-output means (not shown) in addition to the processor 701 and the transceiver 704.

The processor 701 is mainly configured to process a communication protocol and communication data, control the entire communication device, execute a software program, and process data of the software program. The memory 703 is mainly used for storing software programs and data. The transceiver 704 may include radio frequency circuitry and an antenna, the radio frequency circuitry being primarily used for conversion of baseband signals to radio frequency signals and processing of radio frequency signals. The antenna is mainly used for receiving and transmitting radio frequency signals in the form of electromagnetic waves.

When the communication device is powered on, the processor 701 may read the software program in the memory 703, interpret and execute instructions of the software program, and process data of the software program. When data needs to be transmitted wirelessly, the processor 701 performs baseband processing on the data to be transmitted, and outputs a baseband signal to the radio frequency circuit, and the radio frequency circuit performs radio frequency processing on the baseband signal and then transmits the radio frequency signal outwards in the form of electromagnetic waves through the antenna. When data is transmitted to the communication device, the radio frequency circuit receives a radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor 701, and the processor 701 converts the baseband signal into data and processes the data.

In another implementation, the radio frequency circuitry and antenna may be provided separately from the processor performing the baseband processing, e.g., in a distributed scenario, the radio frequency circuitry and antenna may be in a remote arrangement from the communication device.

For example, as shown in fig. 7c, the processor 701 in fig. 7b may include a digital signal processor, a signal generator, and an analog-to-digital converter. The radio frequency circuit for signal transmission may include an up-converter and a power amplifier, and the radio frequency circuit for signal reception may include a down-converter and a power amplifier. The antennas may include a transmit antenna and a receive antenna.

As a possible implementation, a signal generator may be used to generate the signal. The up-converter and down-converter are used to modulate signals onto and demodulate signals from, respectively, high frequency carriers. The power amplifier is used for amplifying the power of the signal. The analog-to-digital converter is used for converting a digital signal and an analog signal. The digital signal processor is arranged to generate the perceptual sequence and to perform autocorrelation and/or cross-correlation operations.

It should be noted that the constituent structure shown in fig. 7a or 7b or 7c does not constitute a limitation of the communication apparatus, and the communication apparatus may include more or less components than those shown in fig. 7a or 7b or 7c, or may combine some components, or may be arranged differently. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

The method provided by the application will be explained in the following with reference to the accompanying drawings. In the embodiment of the present application, the execution body may perform some or all of the steps in the embodiment of the present application, these steps or operations are only examples, and the embodiment of the present application may also perform other operations or variations of various operations. Furthermore, the various steps may be performed in a different order presented in accordance with embodiments of the application, and it is possible that not all of the operations in the embodiments of the application may be performed.

As shown in fig. 8, for a signal transmission method provided by the present application, referring to fig. 8, the signal transmission method includes the following steps:

s801, the first communication device determines N sequence transmission modes, wherein N is a positive integer greater than 1.

Wherein the sequence transmission mode indicates a transmission order of the N sequences, i.e., each sequence transmission mode indicates one transmission order of the N sequences. The transmission order of the N sequences indicated by the different sequence transmission modes is different.

In the present application, the transmission order of the N sequences indicated by the sequence transmission mode may be understood as the arrangement order of the N sequences. The transmission order and the arrangement order may be replaced with each other.

Wherein the N sequences are for transmission by the first communication device in N periods. For example, the first communication device may transmit an nth sequence of sequence transmission mode indications in an nth period, n=0, 1.

Among the N sequence transmission modes, the cyclic shift amount between the transmission orders indicated by any two adjacent sequence transmission modes is 1. That is, in any adjacent sequence transmission mode, the transmission order indicated by one sequence transmission mode is cyclically shifted by 1 bit, and the transmission order indicated by the other sequence transmission mode can be obtained.

Illustratively, taking the N sequences numbered 1,2,3, respectively, as an example, the transmission order of the 1 st sequence transmission mode indication in the N sequence transmission modes may be: 1,2, 3., N, i.e., sequence 1, sequence 2, sequence 3, …, sequence N are sequentially transmitted over N cycles. The transmission order of the 2 nd sequence transmission mode indication of the N sequence transmission modes may be 2, 3..n, 1, i.e. sequence 2, sequence 3, …, sequence N, sequence 1 are transmitted sequentially in N cycles. The transmission order indicated by the 3 rd sequence transmission mode of the N sequence transmission modes may be 3..n, 1,2, i.e., sequence 3, sequence 4, …, sequence N, sequence 1, sequence 2 are transmitted sequentially in N cycles. And so on, the transmission sequence of the N sequence transmission mode indications is respectively as follows:

sequence transmission mode 1:1,2,3,4,..n-2, N-1, N.

Sequence transmission mode 2:2,3,4, &, N-2, N-1, N,1.

Sequence transmission mode 3:3, 4., N-2, N-1, N,1,2.

Sequence transmission mode N-2: n-2, N-1, N,1,2, & gt, N-5,N-4, N-3.

Sequence transmission mode N-1: n-1, N,1,2, & N-4, N-3, N-2.

Sequence transmission mode N: n,1,2,3, &, N-3, N-2, N-1.

In the above example, cyclically shifting the transmission order indicated by the sequence transmission mode 1 to the left by 1 bit may result in the transmission order indicated by the sequence transmission mode 2. The transmission order indicated by the sequence transmission mode 2 may be cyclically shifted to the right by 1 bit to obtain the transmission order indicated by the sequence transmission mode 1. Further, the transmission order indicated by the sequence transmission mode 2 may be shifted to the left by 1 bit to obtain the transmission order indicated by the sequence transmission mode 3, and the transmission order indicated by the sequence transmission mode 1 may be shifted to the left by 2 bits to obtain the transmission order indicated by the sequence transmission mode 3.

Alternatively, in the N sequence transmission modes, the cyclic shift amount between any two sequence transmission modes may be understood as a distance between the any two sequence transmission modes, that is, a distance between any two sequence transmission modes is defined as a cyclic shift amount between transmission orders indicated by the any two sequence transmission modes. Therefore, the cyclic shift amount and the distance in the present application can be replaced with each other. For example, in the above example, the cyclic shift amount between the sequence transmission mode 1 and the sequence transmission mode 2 is 1, and the distance between the sequence transmission mode 1 and the sequence transmission mode 2 is 1. The cyclic shift amount between the sequence transmission mode 1 and the sequence transmission mode 3 is 2, and the distance between the sequence transmission mode 1 and the sequence transmission mode 3 is 2.

The transmission order indicated by the sequence transmission pattern 1 is shifted by 1 bit to the right in a cyclic manner to obtain the transmission order indicated by the sequence transmission pattern N, and the transmission order indicated by the sequence transmission pattern N-1 is shifted by 2 bits to the right in a cyclic manner. Therefore, when N is an even number, the maximum cyclic shift amount (or maximum distance) between the sequence transmission modes is equal to N/2.

Illustratively, taking N equal to 10 as an example, for the N sequence transmission modes shown above, the amount of cyclic shift (or distance) between the respective sequence transmission modes may be as shown in table 1 below.

TABLE 1

Alternatively, the N sequences may include one of the following: an M sequence, a Gold sequence, a GCP sequence, or an Itatov sequence. Of course, the N sequences may be other types of sequences, and the type of the N sequences is not particularly limited in the present application.

The types of different sequences in the N sequences are the same, for example, the N sequences may be N M sequences, or N Gold sequences, or N (pairs of) GCP sequences, or N ipatv sequences.

Alternatively, a sequence in the present application may refer to a sequence, for example, a sequence may refer to an M sequence, or, alternatively, may refer to a Gold sequence; alternatively, a sequence in the present application may refer to a plurality of sequences used as a whole, for example, a sequence may refer to two sequences included in a GCP sequence, or may refer to other sequences used as a whole including a plurality of sequences.

Alternatively, the N sequences may be all sequences of a certain type defined by the protocol, for example, 10M sequences are defined by the standard, and then the N sequences are the 10M sequences defined by the standard.

Alternatively, the N sequences may be partial sequences in a certain type of sequence defined by the protocol, for example, 10M sequences are defined by the standard, and then the N sequences may be partial M sequences in the 10M sequences defined by the standard, where the partial M sequences are M sequences supported by the first communication device.

Alternatively, the N sequence transmission modes may be protocol-defined. At this time, the N sequence transmission modes may be stored in the first communication apparatus in advance. The first communication apparatus determines N sequence transmission modes, which can be understood as: the first communication device reads its stored N sequence transmission modes.

Alternatively, the N sequence transmission modes may be autonomously determined by the first communication apparatus. For example, assuming that N sequences are stored in the first communication apparatus, the first communication apparatus may determine N sequence transmission modes from the N sequences.

S802, the first communication device transmits a first signal according to a first sequence transmission mode.

Wherein the N sequence transmission modes include the first sequence transmission mode.

Alternatively, the first sequence transmission mode may be any one of the above-described N sequence transmission modes. Alternatively, the first sequence transmission mode may be determined according to K second sequence transmission modes and N sequence transmission modes. K is a positive integer. The second sequence transmission mode is a sequence transmission mode corresponding to the second communication device. The second communication device may be any communication device other than the first communication device, for example.

As a possible implementation, before step S802, the first communication device may receive the sequence sent by the second communication device. For example, the first communication device may monitor the sequence transmitted by the second communication device for a transmission duration of one sequence according to the first period. The transmission duration of a sequence can be understood as the duration of a single interception. The first period may be understood as the interval between two adjacent listens. The first period is greater than or equal to a transmission duration of the first signal. Alternatively, the first period is greater than or equal to the transmission duration (or transmission period) of the N sequences. That is, it is assumed that the transmission duration of each of the above N sequences is T ₁ The first period is T ₂ T is then ₂ ≥NT ₁ 。

Exemplary, as shown in FIG. 9, prior to time T, the first communication device is at T ₁ The listening is performed for a duration, and then the N sequences may be transmitted. Thereafter, it may continue at T ₁ And monitoring in the duration, and continuing to transmit N sequences after the monitoring is finished, and the like until the first communication device does not need to transmit the sequences.

Illustratively, the first communication device listening may include: the first communication device is at a T ₁ And receiving the interference signal, performing autocorrelation calculation with the N sequences respectively by using the interference signal, and if no autocorrelation peak appears, indicating that the sequence transmitted by the second communication device is not monitored, or indicating that the second communication device does not transmit the sequence. If an autocorrelation peak occurs, it indicates that a sequence sent by the second communication device is monitored, or indicates that the second communication device sends a sequence, and the first communication device can determine the sequence sent by the second communication device according to the autocorrelation peak. Wherein the first sequence is one of the N sequences.

If the first communication device does not monitor the sequence transmitted by the second communication device within the transmission duration of one sequence, the first communication device may arbitrarily select one sequence transmission mode from the N sequence transmission modes as the first sequence transmission mode. Exemplary, as shown in FIG. 9, assume that a first communication device is at a first T ₁ If no sequence transmitted by the second communication apparatus is monitored, the first communication apparatus may transmit N sequences in the order indicated by the arbitrary sequence transmission mode.

If the first communication device monitors the first sequences transmitted by the K second communication devices within the transmission duration of one sequence, the first communication device may determine K second sequence transmission modes according to the monitored K first sequences, and determine the first sequence transmission mode according to the K second sequence transmission modes and the N sequence transmission modes. For example, the first communication apparatus may determine the sequence transmission mode in which the indicated first sequence is the first sequence as the second sequence transmission mode, that is, the first sequence indicated by the second sequence transmission mode is the first sequence. For example, taking K equal to 1 as an example, assuming that the first sequence monitored by the first communication device is sequence 2, the corresponding second sequence transmission mode may be the sequence transmission mode 2.

Optionally, between the N sequencesThe transmission interval may or may not be present. Exemplary, as shown in FIG. 10a, at S _n The N-th sequence of the N sequences is represented, n=0, 1,..n-1 is exemplified by the transmission duration T of one sequence when there is a transmission interval ₁ Including the duration and transmission interval occupied by the sequence. As shown in fig. 10b, when there is no transmission interval, the transmission duration T of one sequence ₁ Equal to the duration of the sequence occupation.

Alternatively, the second sequence transmission mode may be a sequence transmission mode used by the second communication apparatus. Alternatively, the second sequence transmission mode may be a sequence transmission mode in which the sequence transmission mode used by the second communication apparatus is cyclically shifted. For example, when the first sequence is a first sequence indicated by a sequence transmission mode used by the second communication apparatus, the second sequence transmission mode is a sequence transmission mode used by the second communication apparatus; when the first sequence is not the first sequence indicated by the sequence transmission mode used by the second communication apparatus, the second sequence transmission mode is a sequence transmission mode in which the sequence transmission mode used by the second communication apparatus is cyclically shifted.

It will be appreciated that, whether the second sequence transmission mode is the sequence transmission mode used by the second communication device or not, since there is a transmission delay between the second communication device and the first communication device, the sequence actually interfering with the first communication device is monitored by the first communication device after the delay, and there is a delay between the transmission of the first sequence by the second communication device and the monitoring of the first sequence by the first communication device, and the sequence after the delay is the sequence interfering with the first communication device, so that the sequence actually interfering with the first communication device transmitted by the second communication device conforms to the second sequence transmission mode. Thus, the first communication apparatus determines the first sequence transmission mode according to the second sequence transmission mode, and interference of the second communication apparatus to the first communication apparatus can be reduced.

As a possible implementation, when K is equal to 1, the first sequence transmission mode may be: and a sequence transmission mode having the largest cyclic shift amount (or distance) from the one second sequence transmission mode among the N sequence transmission modes.

For example, assuming that N is equal to 10 and the cyclic shift amount between 10 sequence transmission modes is as shown in table 1 above as an example, assuming that the second sequence transmission mode is sequence transmission mode 2, the sequence transmission mode having the largest cyclic shift amount with sequence transmission mode 2 is sequence transmission mode 7, and thus, the first sequence transmission mode is sequence transmission mode 7.

As another possible implementation, when K is greater than 1, the first sequence transmission mode may be: and a sequence transmission mode having a largest sum of cyclic shift amounts (or distances) between each of the K second sequence transmission modes among the N sequence transmission modes.

Illustratively, taking N equal to 10 and the cyclic shift amount between 10 sequence transmission modes as shown in table 1 above, K equal to 2 as an example, assuming that K second sequence transmission modes are sequence transmission mode 2 and sequence transmission mode 3, then:

for sequence transmission mode 1: the cyclic shift amount between the sequence transmission mode 2 and the sequence transmission mode 3 is 1, and the cyclic shift amount between the sequence transmission mode 3 is 2, so that the sum of the cyclic shift amounts is 3;

For sequence transmission mode 4: the cyclic shift amount between the sequence transmission mode 2 and the sequence transmission mode 3 is 1, and thus the sum of the cyclic shift amounts is 3;

for sequence transmission mode 5: the cyclic shift amount between the sequence transmission mode 2 and the cyclic shift amount between the sequence transmission mode 3 is 3, and the cyclic shift amount between the sequence transmission mode 3 is 2, so that the sum of the cyclic shift amounts is 5;

for sequence transmission mode 6: the cyclic shift amount between the sequence transmission mode 2 and the sequence transmission mode 3 is 4, and the cyclic shift amount between the sequence transmission mode 3 is 3, so that the sum of the cyclic shift amounts is 7;

for sequence transmission mode 7: the cyclic shift amount between the sequence transmission mode 2 and the sequence transmission mode 3 is 5, and the cyclic shift amount between the sequence transmission mode 3 is 4, so that the sum of the cyclic shift amounts is 9;

for sequence transmission mode 8: the cyclic shift amount between the sequence transmission mode 2 and the sequence transmission mode 3 is 4, and the cyclic shift amount between the sequence transmission mode 3 is 5, so that the sum of the cyclic shift amounts is 9;

for sequence transmission mode 9: the cyclic shift amount between the sequence transmission mode 2 is 3, and the cyclic shift amount between the sequence transmission mode 3 is 4, so that the sum of the cyclic shift amounts is 7;

For sequence transmission mode 10: the cyclic shift amount between the sequence transmission mode 2 and the sequence transmission mode 3 is 2, and the cyclic shift amount between the sequence transmission mode 3 is 3, so that the sum of the cyclic shift amounts is 5.

Wherein the cyclic shift amounts between the sequence transmission mode 7 and the sequence transmission mode 8 and the two second sequence transmission modes are maximized, and thus, the first sequence transmission mode may be one of the sequence transmission mode 7 and the sequence transmission mode 8.

As yet another possible implementation, when K is greater than 1, the first sequence transmission mode is: and a sequence transmission mode with the largest cyclic shift amount between the N sequence transmission modes and the target second sequence transmission mode. The target second sequence sending mode is a sequence sending mode with the strongest interference power corresponding to the K second sequence sending modes. For example, the interference power corresponding to the second sequence transmission mode may be the received signal strength or the received signal power of the first sequence.

For example, taking N equal to 10 and the cyclic shift amount between 10 sequence transmission modes as shown in table 1 above, K equal to 2 as an example, assuming that K second sequence transmission modes are sequence transmission mode 2 and sequence transmission mode 3 and the interference power corresponding to sequence transmission mode 3 is greater than the interference power corresponding to sequence transmission mode 2, then the target second sequence transmission mode is sequence transmission mode 3. The first sequence transmission mode is a sequence transmission mode having the largest cyclic shift amount from the sequence transmission mode 3, i.e., a sequence transmission mode 8, among the N sequence transmission modes.

Alternatively, the first signal may be used for sensing. For example, the first signal may be a signal for radar ranging, or the first signal may be a signal for sensing distance.

For example, in the 5G or 6G mobile communication system, the first signal may be one of a synchronization signal (synchronization signal, SS), an SRS, a Random Access (RA) signal, a channel state information reference signal (channel state information reference signal, CSI-RS), a demodulation reference signal (demodulation reference signal, DMRS), or a positioning reference signal (positioning reference signal, PRS); alternatively, the first signal may be a reference signal dedicated to sensing. In UWB, the first signal may be a preamble signal.

Alternatively, the first signal may include N periods of sub-signals. Wherein the sub-signal in the nth period is generated by the nth sequence indicated by the first sequence transmission mode. n=0, 1,..n-1.

For example, taking the first sequence transmission mode as the sequence transmission mode 3, the 0 th sequence indicated by the sequence transmission mode 3 is the sequence 3, the 1 st sequence is the sequence 4, the 2 nd sequence is the sequence 5, …, the N-3 th sequence is the sequence N, the N-2 nd sequence is the sequence 1, and the N-1 st sequence is the sequence 2. Thus, the first signal comprises the sub-signal in the 0 th period generated by the sequence 3, the sub-signal in the 1 st period generated by the sequence 4, the sub-signal in the 2 nd period generated by the sequence 5, …, the sub-signal in the N-3 rd period generated by the sequence N, the sub-signal in the N-2 th period generated by the sequence 1, the sub-signal in the N-1 th period generated by the sequence 2.

As a possible implementation, the N sequences may be sequences of a first type. The first type of sequence may be a sequence with perfect periodic autocorrelation characteristics, or may be a sequence with better periodic autocorrelation characteristics. At this time, the nth sequence indicated by the first sequence transmission mode may include P repeated first-type sequences, or, the sub-signal in the nth period is repeatedly generated P times by the nth sequence (the first-type sequence) indicated by the first sequence transmission mode. Further, there may be no transmission interval between the first type sequences of the P repetitions, i.e., the nth sequence indicated by the transmission mode of the first sequence may be repeatedly transmitted without an interval. P is a positive integer greater than 1.

For example, taking the first sequence transmission mode as the sequence transmission mode 3 and the N sequences as the first type of sequences, it is assumed that the sequence 1 is represented as S ₁ Sequence 2 is denoted S ₂ … the sequence N is denoted S _N The sequence of the first signal bearing may be as shown in fig. 11 a.

When the first signal and the echo signal of the first signal are subjected to correlation operation, and the nth sequence indicated by the first sequence transmission mode is repeatedly transmitted without intervals, the correlation operation performed on the first signal and the echo signal of the first signal can be made to be periodic autocorrelation operation, so that perfect or better periodic autocorrelation properties of the first sequence are reasonably utilized, and further, the perception performance is improved.

In addition, when the first signal and the echo signal of the first signal are subjected to the periodic autocorrelation operation, in order to reduce interference, the last repeated transmission of the sequence n may be used as a guard interval, and does not participate in the periodic autocorrelation operation. Exemplary, as shown in FIG. 11a, the last S ₃ Last S ₄ Last S ₁ Last S ₂ As a guard interval.

As another possible implementation, the N sequences may be sequences of the second type. The second type of sequence may be a sequence with perfect aperiodic autocorrelation characteristics, or may be a sequence with better aperiodic autocorrelation characteristics. At this time, the nth sequence indicated by the first sequence transmission mode may include P repeated second class sequences, or, the sub-signal in the nth period is repeatedly generated P times by the nth sequence (the second class sequence) indicated by the first sequence transmission mode. Further, there is a transmission interval between the P repeated second class sequences, where the transmission interval is greater than or equal to a duration occupied by transmitting the second class sequences. P is a positive integer greater than 1.

For example, taking the first sequence transmission mode as the sequence transmission mode 3, N sequences as the second class sequences, and P as 3, it is assumed that the sequence 1 is represented as S ₁ Sequence 2 is denoted S ₂ … the sequence N is denoted S _N The sequence of the first signal bearing may be as shown in fig. 11 b.

Optionally, when there is a transmission interval between the P repeated second type sequences, the transmission interval between different sequences may be used as a guard interval, so as to reduce interference between sequences.

When the first signal and the echo signal of the first signal are subjected to correlation operation, a transmission interval exists between the n-th sequences of the P repetitions, so that the correlation operation performed on the first signal and the echo signal of the first signal is a non-periodic autocorrelation operation, and therefore perfect or better non-periodic autocorrelation properties of the first sequence are reasonably utilized, and further, the perception performance is improved.

Alternatively, in the case where the sub-signal in the nth period is repeatedly generated P times by the nth sequence indicated by the transmission mode of the first sequence, the transmission duration of the first signal may be NT ₁ P, first period T ₂ Can satisfy the following conditions: t (T) ₂ ≥NT ₁ P. Wherein T is ₁ Representing the duration of transmission of a sequence. The above-described fig. 10a and 10b can be understood as examples when the nth sequence is not repeated (i.e., P is equal to 1).

Alternatively, the first signal may be a single carrier signal, and the first communication device may generate the first signal based on the first sequence transmission mode by means of phase modulation. Of course, the first signal may also be a multi-carrier signal, which is not particularly limited in the present application.

Based on the above-described scheme, the first communication apparatus transmits the first signal according to a first sequence transmission mode of the N sequence transmission modes, and since the sequence transmission mode may indicate a transmission order of the N sequences, transmitting the first signal according to the first sequence transmission mode may cause the first signal to carry (or include) N different sequences. When the N sequences are not perfect autocorrelation sequences, the ratio of autocorrelation sidelobes to autocorrelation peaks can be reduced, thereby improving the perception precision. When the N sequences are in poor cross correlation, the ratio of the cross correlation result to the autocorrelation peak can be reduced, so that interference among different communication devices is reduced.

In addition, the first sequence transmission mode may be determined according to at least one second sequence transmission mode corresponding to the second communication device, so that different communication devices may use different sequences in the same period, thereby further reducing interference between different communication devices.

That is, the scheme provided by the application can improve the perception performance in terms of improving the perception precision or reducing the interference among different communication devices.

In some implementation scenarios, as shown in fig. 12, after step S802, the signaling method further includes the following steps S803-S805:

S803, the first communication device receives an echo signal of the first signal.

Optionally, the receiving antenna starts to receive the echo signal of the first signal in an omni-directional or directional manner after the first communication device starts to transmit the first signal.

Alternatively, the antenna used by the first communication device to transmit the first signal and the antenna to receive the echo signal of the first signal may be the same or different. The first communication device may be considered to operate in full duplex mode when the same.

S804, the first communication device performs autocorrelation operation according to the echo signal and the first signal.

Optionally, the first communication device may perform sub-correlation operations of the echo signal and the first signal for N periods, to obtain N autocorrelation results, and accumulate the N autocorrelation results to obtain a final autocorrelation operation result, that is, the autocorrelation operation result obtained after step S804 is a result obtained by accumulating the autocorrelation results for N periods.

S805, the first communication device determines the distance between the first communication device and the target object according to the result of the autocorrelation operation.

Optionally, the first communication device may determine a signal propagation delay between the first communication device and the target object according to a displacement corresponding to a maximum autocorrelation peak of the autocorrelation result obtained in step S804. And then, determining the distance between the first communication device and the target object according to the signal transmission delay. Taking the first signal as a single carrier signal as an example, assuming that the displacement corresponding to the maximum autocorrelation peak is l, the time delay is Is lT _C The distance between the target object and the first communication device is clT _C /2. Wherein c is the speed of light. T (T) _C Representing the pulse duration.

Alternatively, under non-ideal channel conditions, the echo signal may be accompanied by a noise signal. That is, the signal received by the first communication apparatus in step S803 may include a noise signal and an echo signal of the first signal, and at this time, the first communication apparatus may perform the above-described step S804 with the signal received in step S803 as a whole.

The embodiments of the present application have been described above. In the following, the case of cross-correlation between sequences and autocorrelation of sequences when the scheme of the present application is applied will be described by taking the scheme of the present application as an example, where the scheme of the present application is applied to an M sequence, an ipatv sequence, a GCP sequence, and a Gold sequence, respectively.

In some embodiments, the scheme of the present application may be applied to M sequences, i.e. the N sequences may be M sequences. Taking the length 127M sequence as an example, there are 18 total length 127M sequences, i.e., N is equal to 18. Based on the scheme of the application, the following 18 sequence transmission modes can be defined:

sequence transmission mode 1:1,2,3,4,...,16,17,18.

Sequence transmission mode 2:2,3,4,5,...,17,18,1.

Sequence transmission mode 3:3,4,5,6,...,18,1,2.

Sequence transmission mode 16:16,17,18,1,...,13,14,15.

Sequence transmission mode 17:17,18,1,2,...,14,15,16.

Sequence transmission mode 18:18,1,2,3,...,15,16,17.

For the 18 kinds of sequence transmission modes, the periodic cross-correlation result between every two sequence transmission modes can be calculated to represent interference between different communication devices. Illustratively, the periodic cross-correlation between sequence transmission mode 1 and sequence transmission mode 2 results in: the sum of the periodic cross-correlation results of the nth M-sequence indicated by the sequence transmission mode 1 and the nth M-sequence indicated by the sequence transmission mode 2, n=0, 1. That is, the periodic cross-correlation result between the sequence transmission mode 1 and the sequence transmission mode 2 is an accumulated value of the following 18 periodic cross-correlation results: the periodic cross-correlation results of M-sequence 1 and M-sequence 2, the periodic cross-correlation results of M-sequence 2 and M-sequence 3, the periodic cross-correlation results of M-sequence 3 and M-sequence 4, …, the periodic cross-correlation results of M-sequence 16 and M-sequence 17, the periodic cross-correlation results of M-sequence 17 and M-sequence 18, and the periodic cross-correlation results of M-sequence 18 and M-sequence 1.

Alternatively, the above-described periodic cross-correlation result may be a relative value in decibels (dB). Illustratively, the periodic cross-correlation result between two sequences may be equal to:

For example, the periodic cross-correlation result for M-sequence 1 and M-sequence 2 is equal to:

for M sequences of the same length, the periodic autocorrelation peaks of different M sequences are the same. For example, of 18M sequences of length 127, the periodic autocorrelation peaks of each M sequence are identical.

Assuming that the above 18M sequences of length 127 are applied to the conventional scheme, for a certain communication apparatus, the communication apparatus may repeatedly transmit one of the 18M sequences in different periods. At this time, interference between different communication apparatuses is determined by the periodic cross-correlation results of the M sequences transmitted respectively. Thus, for 18M sequences of length 127, the periodic cross correlation result between every two M sequences can be calculated to represent interference between different communication devices. The calculation of the periodic cross-correlation result between two sequences may refer to the above description of the correlation, and will not be repeated here.

Assuming that the 18M sequences with length 127 are applied to a sequence transmission scheme in a perceived scene based on an NR protocol, initializing c _init In the case of =1, 2,3,..18, the ratio of the total sum according to f (n _s ),n _s The calculation method of =0, 1, 2..17 also gives 18 kinds of sequence transmission modes. For 18 sequence transmission modes in this scenario, the periodic cross-correlation result between the two sequence transmission modes can also be calculated to represent the interference between different communication devices. By way of example, three of 18 sequence transmission modes based on the NR protocol are shown below, and the remaining sequence transmission modes are not shown:

Sequence transmission mode 1:10 16,0,4,2,7, 12, 16,0,4,6, 17,1,0,2, 10,6,3;

sequence transmission mode 2:11 17,1,5,3,8, 13, 17,1,5,7,0, 13,1,3, 11,7,4;

sequence transmission mode 3:10 10, 11, 10,5, 13,8,2, 11, 10,5,4, 17,2,7, 15, 12,6; … ….

Illustratively, as shown in table 2, M sequences of length 127 are shown, which are applied to the scheme of the present application, the conventional scheme, and the NR protocol-based sequence transmission scheme, respectively, to the maximum value, the minimum value, and the average value of the periodic cross-correlation result.

TABLE 2

It will be appreciated that the larger the value of the periodic cross-correlation result, the more likely interference between different communication devices will be indicated. Thus, as can be seen from table 2, for M sequences, the maximum value, the minimum value, and the average value of the periodic cross correlation result corresponding to the scheme of the present application are lower than those of the sequence transmission scheme and the conventional scheme based on the NR protocol, and thus, the scheme based on the present application can reduce interference between different communication apparatuses.

Optionally, in the scheme of the present application, when the first signal is generated by the M sequence, the M sequence has perfect periodic autocorrelation property, that is, the M sequence is the first type sequence, so the M sequence carried by the first signal, or the transmission manner of the M sequence may be as shown in fig. 11 a.

In other embodiments, the protocol of the present application may be applied to an ipatv sequence, i.e. the N sequences may be ipatv sequences. Taking 9 ipatv sequences with length 127 as an example, based on the scheme of the present application, the following 9 sequence transmission modes can be defined:

sequence transmission mode 1:1,2,3,4,...,7,8,9.

Sequence transmission mode 2:2,3,4,5,...,8,9,1.

Sequence transmission mode 3:3,4,5,6,...,9,1,2.

Sequence transmission mode 7:7,8,9,1,...,4,5,6.

Sequence transmission mode 8:8,9,1,2,...,5,6,7.

Sequence transmission mode 9:9,1,2,3,...,6,7,8.

For the above 9 sequence transmission modes, the periodic cross-correlation result between the two sequence transmission modes can be calculated to represent the interference between different communication devices. The result of the periodic cross-correlation between the two sequence transmission modes may refer to the description of the correlation of the M sequences, which is not described herein.

Assuming that the above 9 ipatv sequences of length 127 are applied to the conventional scheme, for a certain communication apparatus, the communication apparatus may repeatedly transmit one of the 9 ipatv sequences in different periods. At this time, interference between different communication apparatuses is determined by the result of the periodic cross-correlation of the ipatv sequences transmitted respectively. Thus, for 9 ipatv sequences of length 127, the periodic cross-correlation results between two ipatv sequences can be calculated to represent interference between different communication devices. The calculation of the periodic cross-correlation result between two sequences may refer to the above description of the correlation, and will not be repeated here.

Assuming that the above 9 length 127 ipatv sequences are applied to the sequence transmission scheme in the NR protocol-based perceptual scenario, initializing c _init In the case of =1, 2,3,..9, the above-described f (n _s ),n _s The calculation method of =0, 1,2,..8 can also obtain 9 kinds of sequence transmission modes. For the 9 sequence transmission modes in this scenario, the periodic cross-correlation result between the two sequence transmission modes can also be calculated to represent the interference between different communication devices. By way of example, three of 9 sequence transmission modes obtained based on the NR protocol are shown below, and the remaining sequence transmission modes are not shown:

sequence transmission mode 1:1,7,0,4,2,7,3,7,0;

sequence transmission mode 2:2,8,1,5,3,8,4,8,1;

sequence transmission mode 3:1,1,2,1,5,4,8,2,2; … ….

Illustratively, as shown in table 3, there are shown maximum, minimum, and average values of the periodic cross-correlation results when the length 127 ipatv sequence is applied to the scheme of the present application, the conventional scheme, and the NR protocol-based sequence transmission scheme, respectively.

TABLE 3 Table 3

As can be seen from table 3, for the ipatv sequence, the maximum value, the minimum value, and the average value of the periodic cross correlation result corresponding to the scheme of the present application are lower than those of the NR protocol-based sequence transmission scheme and the conventional scheme, and thus, the scheme based on the present application can reduce interference between different communication apparatuses.

Alternatively, the 9 length 127 ipatv sequences may be any random 9 length 127 ipatv sequences. In addition, for any 9 ipatv sequences of length 127, the maximum, minimum, and average values of the periodic cross correlation results corresponding to the scheme of the present application are lower compared to the NR protocol based sequence transmission scheme and the conventional scheme.

Alternatively, in the scheme of the present application, when the first signal is generated by the ipatv sequence, the ipatv sequence has perfect periodic auto-correlation property, that is, the ipatv sequence is the first type of sequence, so the ipatv sequence carried by the first signal, or the sending manner of the ipatv sequence, may be as shown in fig. 11 a.

In still other embodiments, the scheme of the present application may be applied to GCP sequences, i.e. the N sequences may be GCP sequences. Taking 40 GCP sequences with length of 128 as an example, based on the scheme of the present application, the following 40 sequence transmission modes can be defined:

sequence transmission mode 1:1,2,3,4,...,38,39,40.

Sequence transmission mode 2:2,3,4,5,...,39,40,1.

Sequence transmission mode 3:3,4,5,6,...,9,1,2.

Sequence transmission mode 38:38,39,40,1,...,35,36,37.

Sequence transmission mode 39:39,40,1,2,...,36,37,38.

Sequence transmission mode 40:40,1,2,3,...,37,38,39.

For the 40 sequence transmission modes, the periodic cross-correlation result between every two sequence transmission modes can be calculated to represent the interference between different communication devices. The calculation method of the periodic cross-correlation result between two sequence transmission modes is similar to the method of the periodic cross-correlation result between the transmission modes of the sequence M, and the difference is that: the periodic cross correlation peak between two GCP sequences is: the two GCP sequences include the sum of the periodic cross-correlation peak of the two x sequences and the periodic cross-correlation peak of the two y sequences.

Assuming that the above 40 GCP sequences of length 128 are applied to the conventional scheme, for a certain communication apparatus, the communication apparatus may repeatedly transmit one of the 40 GCP sequences in different periods. At this time, interference between different communication apparatuses is determined by the periodic cross-correlation results of the GCP sequences transmitted respectively. Thus, for 40 GCP sequences of length 128, the periodic cross correlation result between GCP sequences can be calculated to represent interference between different communication devices. The calculation of the periodic cross-correlation result between two sequences may refer to the above description of the correlation, and will not be repeated here.

Assuming that the 40 GCP sequences with length of 128 are applied to the sequence transmission scheme in the NR protocol-based perceptual scenario, initializing c _init In the case of =1, 2,3,..40, the above-described f (n _s ),n _s The calculation method of =0, 1, 2..39 also gives 40 sequential transmission modes. For 40 sequence transmission modes in this scenario, the periodic cross-correlation result between the two sequence transmission modes can also be calculated to represent the interference between different communication devices. By way of example, three of 40 sequence transmission modes based on the NR protocol are shown below, and the remaining sequence transmission modes are not shown:

sequence transmission mode 1:24,8, 32, 14,4,9, 32, 26, 32, 14,4, 19, 32, 34, 18,2,4, 19, 24, 36, 10, 16, 28, 16,0, 38, 12, 25, 38, 12, 25, 30, 12, 25, 38,6, 25, 38,6, 11;

sequence transmission mode 2:25,9, 33, 15,5, 10, 33, 27, 33, 15,5, 20, 33, 35, 19,3,5, 20, 25, 37, 11, 17, 29, 17,1, 39, 13, 26, 39, 13, 26, 31, 13, 26, 39,7, 26, 39,7, 12;

sequence transmission mode 3:4, 26, 13, 12, 23, 13,4, 16, 35, 10,7, 20, 37,2, 21, 13, 14, 12, 28, 14, 26,6, 12, 12, 26,2, 10, 21, 12, 10, 19, 12,8, 25, 20, 16, 31, 34, 15; … ….

Illustratively, as shown in table 4, there are shown maximum, minimum, and average values of the periodic cross-correlation results when GCP sequences of length 128 are applied to the scheme of the present application, the conventional scheme, and the NR protocol-based sequence transmission scheme, respectively.

TABLE 4 Table 4

As can be seen from table 4, for the GCP sequence, the maximum value, the minimum value, and the average value of the periodic cross correlation result corresponding to the scheme of the present application are lower than those of the NR protocol-based sequence transmission scheme and the conventional scheme, and thus, the scheme based on the present application can reduce interference between different communication apparatuses.

Alternatively, the 40 GCP sequences of length 128 may be any random 40 GCP sequences of length 128. In addition, for any 40 GCP sequences of length 128, the maximum, minimum, and average values of the periodic cross correlation results corresponding to the scheme of the present application are lower compared to the NR protocol based sequence transmission scheme and the conventional scheme.

Alternatively, in the scheme of the present application, when the first signal is generated by the GCP sequence, since the GCP sequence has perfect aperiodic autocorrelation property, that is, the GCP sequence is the second type sequence, there may be a transmission interval between GCP sequences repeatedly transmitted by the first communication device.

As a possible implementation, when a GCP sequence is repeatedly transmitted, as shown in fig. 13a, the GCP sequence may be repeated in the form of an x sequence, a y sequence, a …, an x sequence, a y sequence, an x sequence, and a y sequence. In addition, there may be a transmission interval between the x-sequence and the y-sequence. The transmission interval between two GCP sequences may be referred to as a guard interval.

As another possible implementation, when a GCP sequence is repeatedly transmitted, as shown in fig. 13b, the repetition may be performed in the form of x sequence, …, x sequence, y sequence, …, y sequence. In addition, transmission intervals may also exist between x-sequences and x-sequences, between y-sequences and y-sequences, and between x-sequences and y-sequences.

Of course, the GCP sequence may be repeatedly transmitted in other manners, for example, in the form of an x sequence, a y sequence, …, an x sequence, a y sequence, and a y sequence, which is not particularly limited in the present application.

In still other embodiments, the scheme of the present application may be applied to Gold sequences, i.e., the N sequences may be Gold sequences. Taking 40 Gold sequences with length of 127 as an example, based on the scheme of the present application, the following 40 sequence transmission modes can be defined:

Sequence transmission mode 1:1,2,3,4,...,38,39,40.

Sequence transmission mode 2:2,3,4,5,...,39,40,1.

Sequence transmission mode 3:3,4,5,6,...,9,1,2.

Sequence transmission mode 38:38,39,40,1,...,35,36,37.

Sequence transmission mode 39:39,40,1,2,...,36,37,38.

Sequence transmission mode 40:40,1,2,3,...,37,38,39.

For the 40 sequence transmission modes, the periodic cross-correlation result between every two sequence transmission modes can be calculated to represent the interference between different communication devices. The result of the periodic cross-correlation between the two sequence transmission modes may refer to the description of the correlation of the M sequences, which is not described herein.

Further, for the sequence transmission mode in the above 40, a periodic autocorrelation result corresponding to each sequence transmission mode may be calculated. For example, the periodic autocorrelation result corresponding to the sequence transmission mode 1 is: sequence transmission mode 1 indicates the sum of the periodic autocorrelation results of the nth Gold sequence, n=0, 1..39. That is, the periodic autocorrelation result corresponding to the sequence transmission mode 1 is the accumulated value of the following 40 periodic autocorrelation results: the result of the periodic autocorrelation of Gold sequence 1, the result of the periodic autocorrelation of Gold sequence 2, …, the result of the periodic autocorrelation of Gold sequence 39, the result of the periodic autocorrelation of Gold sequence 40.

Alternatively, the periodic autocorrelation result may be a relative value in dB. Illustratively, the periodic autocorrelation result of the sequence may be equal to:

for example, the periodic autocorrelation result of Gold sequence 1 is equal to:

note that, for Gold sequences of the same length, the periodic autocorrelation peaks of different Gold sequences are the same. For example, of 40 Gold sequences of length 127, the periodic autocorrelation peaks of the respective Gold sequences are the same.

Assuming that the above 40 Gold sequences of length 127 are applied to the conventional scheme, for a certain communication apparatus, the communication apparatus may repeatedly transmit one of the 40 Gold sequences in different periods. At this time, interference between different communication apparatuses is determined by the result of periodic cross-correlation of the Gold sequences transmitted respectively. Thus, for 40 Gold sequences of length 127, the periodic cross-correlation result between every two Gold sequences can be calculated to represent the interference between different communication devices. The calculation of the periodic cross-correlation result between two sequences may refer to the above description of the correlation, and will not be repeated here. In addition, the autocorrelation result of each Gold sequence may be calculated, and the calculation method may refer to the above description of correlation, which is not described herein.

Assuming that the 40 Gold sequences with length of 127 are applied to a sequence transmission scheme in a perception scene based on NR protocol, initializing c _init In the case of =1, 2,3,..40, the above-described f (n _s ),n _s The calculation method of =0, 1,2,..39 can also obtain 9 kinds of sequence transmission modes. By way of example, three of 40 sequence transmission modes based on the NR protocol are shown below, and the remaining sequence transmission modes are not shown:

sequence transmission mode 1:24,8, 32, 14,4,9, 32, 26, 32, 14,4, 19, 32, 34, 18,2,4, 19, 24, 36, 10, 16, 28, 16,0, 38, 12, 25, 38, 12, 25, 30, 12, 25, 38,6, 25, 38,6, 11;

sequence transmission mode 2:25,9, 33, 15,5, 10, 33, 27, 33, 15,5, 20, 33, 35, 19,3,5, 20, 25, 37, 11, 17, 29, 17,1, 39, 13, 26, 39, 13, 26, 31, 13, 26, 39,7, 26, 39,7, 12;

sequence transmission mode 3:4, 26, 13, 12, 23, 13,4, 16, 35, 10,7, 20, 37,2, 21, 13, 14, 12, 28, 14, 26,6, 12, 12, 26,2, 10, 21, 12, 10, 19, 12,8, 25, 20, 16, 31, 34, 15; … ….

For 40 sequence transmission modes in this scenario, the periodic cross-correlation result between the two sequence transmission modes can also be calculated to represent the interference between different communication devices. In addition, the periodic autocorrelation result corresponding to each sequence transmission mode may also be calculated, and reference may be made to the description of the correlation in the above scheme of the present application, which is not repeated here.

Illustratively, as shown in table 5, gold sequences of length 127 are shown, which are applied to the scheme of the present application, the conventional scheme, and the NR protocol-based sequence transmission scheme, respectively, to the maximum value, the minimum value, and the average value of the periodic cross-correlation results.

TABLE 5

As can be seen from table 5, for Gold sequences, the maximum value, the minimum value, and the average value of the periodic cross-correlation result corresponding to the scheme of the present application are lower than those of the NR protocol-based sequence transmission scheme and the conventional scheme, and thus, the scheme based on the present application can reduce interference between different communication apparatuses.

Illustratively, as shown in table 6, gold sequences of length 127 are shown, which are applied to the scheme of the present application, the conventional scheme, and the NR protocol-based sequence transmission scheme, respectively, to the maximum value, the minimum value, and the average value of the periodic autocorrelation result.

TABLE 6

As can be obtained from table 6, for Gold sequences, the maximum value, the minimum value, and the average value of the periodic autocorrelation result corresponding to the scheme of the present application are lower than those of the NR protocol-based sequence transmission scheme and the conventional scheme, so that the scheme of the present application can reduce the ratio of the autocorrelation sidelobes to the autocorrelation peaks, thereby improving the perception precision.

Alternatively, the 40 Gold sequences with length of 127 may be arbitrary random 40 Gold sequences with length of 127. In addition, for any 40 Gold sequences with length of 127, the maximum value, the minimum value and the average value of the periodic cross correlation result and the periodic autocorrelation result corresponding to the scheme of the application are lower compared with the sequence transmission scheme and the traditional scheme based on NR protocol.

Alternatively, in the scheme of the present application, when the first signal is generated by the Gold sequence, the Gold sequence carried by the first signal, or the transmission manner of the Gold sequence, may be as shown in fig. 11 a.

It will be appreciated that in the various embodiments above, the methods and/or steps implemented by the first communication device may also be implemented by a component (e.g., a processor, chip, system on chip, circuit, logic module, or software such as a chip or circuit) that may be used in the first communication device.

The foregoing has mainly described the solutions provided by the present application. Correspondingly, the application also provides a communication device which is used for realizing the various methods. The communication device may be the first communication device in the above-described method embodiment, or a device comprising the first communication device, or a component usable with the first communication device.

It will be appreciated that the communication device, in order to achieve the above-described functions, comprises corresponding hardware structures and/or software modules performing the respective functions. Those of skill in the art will readily appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as hardware or combinations of hardware and computer software. Whether a function is implemented as hardware or computer software driven hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

The embodiment of the application can divide the functional modules of the communication device according to the embodiment of the method, for example, each functional module can be divided corresponding to each function, or two or more functions can be integrated in one processing module. The integrated modules may be implemented in hardware or in software functional modules. It should be noted that, in the embodiment of the present application, the division of the modules is schematic, which is merely a logic function division, and other division manners may be implemented in actual implementation.

Fig. 14 shows a schematic structural diagram of a communication device 140. The communication device 140 comprises a processing module 1401 and a transceiver module 1402.

In some embodiments, the communication device 140 may also include a memory module (not shown in fig. 14) for storing program instructions and data.

In some embodiments, the transceiver module 1402, which may also be referred to as a transceiver unit, is configured to perform transmit and/or receive functions. The transceiver module 1402 may be comprised of transceiver circuitry, a transceiver, or a communication interface.

In some embodiments, the transceiver module 1402 may include a receiving module and a transmitting module for performing the steps of receiving and transmitting the classes performed by the first communication device in the above-described method embodiments, respectively, and/or for supporting other processes of the techniques described herein; the processing module 1401 may be configured to perform the steps of the processing classes (e.g. determining, acquiring, generating, etc.) performed by the first communication device in the method embodiments described above, and/or to support other processes of the techniques described herein.

The processing module 1401 is configured to determine N sequence transmission modes, where the sequence transmission modes indicate transmission orders of N sequences, and the N sequences are used for being transmitted by the first communication device in N periods, where N is a positive integer greater than 1; wherein, the cyclic shift amount between the sending orders of any two adjacent sequence sending mode indications is 1;

The transceiver module 1402 is configured to transmit a first signal according to a first sequence transmission mode, where the first sequence transmission mode is determined according to K second sequence transmission modes and N sequence transmission modes, the second sequence transmission mode is a sequence transmission mode corresponding to the second communication device, the N sequence transmission modes include the first sequence transmission mode and the K second sequence transmission modes, and K is a positive integer.

Alternatively, when K is equal to 1, the cyclic shift amount between the first sequence transmission mode and one second sequence transmission mode is maximized.

Alternatively, when K is greater than 1, the sum of the cyclic shift amounts between the first sequence transmission mode and each of the second sequence transmission modes is maximum.

Optionally, when K is greater than 1, the cyclic shift amount between the first sequence transmission mode and the target second sequence transmission mode is the largest, and the target second sequence transmission mode is a sequence transmission mode with the strongest interference power corresponding to the K second sequence transmission modes.

Optionally, the first signal includes N periods of sub-signals, the sub-signals in the N-th period being generated by the N-th sequence indicated by the first sequence transmission mode, n=0, 1.

Optionally, the N sequences are sequences of the first type, the nth sequence comprises P repeated sequences of the first type, and P is a positive integer greater than 1.

Optionally, the N sequences are second class sequences, the nth sequence includes P repeated second class sequences, a transmission interval between the P repeated second class sequences is greater than or equal to a duration occupied by transmitting the second class sequences, and P is a positive integer greater than 1.

Optionally, the transceiver module 1402 is further configured to receive a first sequence sent by the second communication device, where the first sequence is one of N sequences; the processing module 1401 is further configured to determine a second sequence transmission mode according to the first sequence, where the first sequence indicated by the second sequence transmission mode is the first sequence.

Optionally, the transceiver module 1402 is further configured to receive a first sequence sent by a second communication device, including: a transceiver module 1402, configured to monitor a sequence sent by the second communication device according to a first period, where the first period is an interval between two adjacent monitoring, and the first sequence is a sequence monitored in the first period; the first period is greater than or equal to a transmission duration of the first signal.

Optionally, the second sequence transmission mode is a sequence transmission mode corresponding to the second communication device, including: the second sequence transmission mode is a sequence transmission mode used by the second communication device; alternatively, the second sequence transmission mode is a sequence transmission mode in which the sequence transmission mode used by the second communication apparatus is cyclically shifted.

Optionally, the transceiver module 1402 is further configured to receive an echo signal of the first signal; the processing module 1401 is further configured to perform an autocorrelation operation according to the echo signal and the first signal; the processing module 1401 is further configured to determine a distance between the first communication device and the target object according to a result of the autocorrelation operation.

Optionally, the first communication device is a radar, or the first communication device is a terminal device or a network device with a radar function.

Optionally, the first signal is a signal for radar ranging.

Optionally, the N sequences include one of the following: an M sequence, a Gold sequence, a golay complementary pair GCP sequence, or an ipatv sequence.

All relevant contents of each step related to the above method embodiment may be cited to the functional description of the corresponding functional module, which is not described herein.

In the present application, the communication device 140 is presented in a form of dividing each functional module in an integrated manner. "module" herein may refer to an application-specific integrated circuit (ASIC), a circuit, a processor and memory that execute one or more software or firmware programs, an integrated logic circuit, and/or other devices that can provide the described functionality.

As one possible product form, one skilled in the art will appreciate that the communication device 140 may take the form of the communication device 700 shown in fig. 7 a.

As an example, the function/implementation procedure of the processing module 1401 in fig. 14 may be implemented by the processor 701 in the communication device 700 shown in fig. 7a invoking a computer executable instruction stored in the memory 703, and the function/implementation procedure of the transceiver module 1402 in fig. 14 may be implemented by the communication interface 704 in the communication device 700 shown in fig. 7 a.

As another possible product form, the communication device according to the embodiment of the present application may be implemented by using the following: one or more field programmable gate arrays (field programmable gate array, FPGA), programmable logic devices (programmable logic device, PLD), controllers, state machines, gate logic, discrete hardware components, any other suitable circuit or circuits capable of performing the various functions described throughout this application.

In some embodiments, when the communication device 140 in fig. 14 is a chip or a chip system, the functions/implementation of the transceiver module 1402 may be implemented through an input/output interface (or a communication interface) of the chip or the chip system, and the functions/implementation of the processing module 1401 may be implemented through a processor (or a processing circuit) of the chip or the chip system.

Since the communication device 140 provided in this embodiment can perform the above method, the technical effects obtained by the method can be referred to the above method embodiment, and will not be described herein.

In some embodiments, the embodiments of the present application further provide a communication device, where the communication device includes a processor, and the processor is configured to implement the method in any of the method embodiments described above.

As a possible implementation, the communication device further comprises a memory. The memory for storing the necessary program instructions and data, and the processor may invoke the program code stored in the memory to instruct the communication device to perform the method of any of the method embodiments described above. Of course, the memory may not be in the communication device.

As another possible implementation, the communication apparatus further includes an interface circuit, which is a code/data read/write interface circuit, for receiving computer-executable instructions (the computer-executable instructions are stored in a memory, may be read directly from the memory, or may be transmitted to the processor via other devices).

As a further possible implementation, the communication device further comprises a communication interface for communicating with a module outside the communication device.

It will be appreciated that the communication device may be a chip or a chip system, and when the communication device is a chip system, the communication device may be formed by a chip, or may include a chip and other discrete devices, which is not specifically limited in the embodiments of the present application.

The application also provides a computer readable storage medium having stored thereon a computer program or instructions which when executed by a computer, performs the functions of any of the method embodiments described above.

The application also provides a computer program product which, when executed by a computer, implements the functions of any of the method embodiments described above.

Those skilled in the art will understand that, for convenience and brevity, the specific working process of the system, apparatus and unit described above may refer to the corresponding process in the foregoing method embodiment, which is not described herein again.

It will be appreciated that the systems, apparatus and methods described herein may be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

The units described as separate components may or may not be physically separate, i.e. may be located in one place, or may be distributed over a plurality of network elements. The components shown as units may or may not be physical units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using a software program, it may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions described in the embodiments of the present application are produced in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by a wired (e.g., coaxial cable, fiber optic, digital subscriber line (digital subscriber line, DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer readable storage medium may be any available medium that can be accessed by a computer or a data storage device including one or more servers, data centers, etc. that can be integrated with the medium. The usable medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a Solid State Disk (SSD)), or the like. In an embodiment of the present application, the computer may include the apparatus described above.

Although the application is described herein in connection with various embodiments, other variations to the disclosed embodiments can be understood and effected by those skilled in the art in practicing the claimed application, from a study of the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other elements or steps, and the "a" or "an" does not exclude a plurality. A single processor or other unit may fulfill the functions of several items recited in the claims. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage.

Although the application has been described in connection with specific features and embodiments thereof, it will be apparent that various modifications and combinations can be made without departing from the spirit and scope of the application. Accordingly, the specification and drawings are merely exemplary illustrations of the present application as defined in the appended claims and are considered to cover any and all modifications, variations, combinations, or equivalents that fall within the scope of the application. It will be apparent to those skilled in the art that various modifications and variations can be made to the present application without departing from the spirit or scope of the application. Thus, it is intended that the present application also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims (17)

1. A method of signaling, the method being applied to a first communication device, the method comprising:

determining N sequence transmission modes, the sequence transmission modes indicating a transmission order of N sequences, the N sequences being for transmission by the first communication device in N periods, N being a positive integer greater than 1; wherein the cyclic shift amount between the transmission orders indicated by any two adjacent sequence transmission modes is 1;

and transmitting a first signal according to a first sequence transmission mode, wherein the first sequence transmission mode is determined according to K second sequence transmission modes and N sequence transmission modes, the second sequence transmission modes are sequence transmission modes corresponding to a second communication device, the N sequence transmission modes comprise the first sequence transmission mode and the K second sequence transmission modes, and K is a positive integer.

2. The method of claim 1, wherein the amount of cyclic shift between the first sequence transmission mode and the one second sequence transmission mode is greatest when K is equal to 1.

3. The method of claim 1, wherein a sum of cyclic shift amounts between the first sequence transmission mode and each of the second sequence transmission modes is maximized when K is greater than 1.

4. The method of claim 1, wherein the cyclic shift amount between the first sequence transmission mode and a target second sequence transmission mode is largest when K is greater than 1, the target second sequence transmission mode being a sequence transmission mode with a strongest interference power among the K second sequence transmission modes.

5. The method of any one of claims 1-4, wherein the first signal comprises N cycles of sub-signals, the sub-signals within an nth cycle being generated by an nth sequence indicated by the first sequence transmission mode, N = 0, 1.

6. The method of claim 5, wherein the N sequences are sequences of a first type and the nth sequence comprises P repeats of the sequences of the first type, P being a positive integer greater than 1.

7. The method of claim 5, wherein the N sequences are second class sequences, the nth sequence comprises P repeated second class sequences, a transmission interval between the P repeated second class sequences is greater than or equal to a duration occupied by transmitting the second class sequences, and P is a positive integer greater than 1.

8. The method according to any of claims 1-7, wherein prior to said transmitting the first signal according to the first sequence transmission mode, the method further comprises:

Receiving a first sequence sent by the second communication device, wherein the first sequence is one of the N sequences;

and determining the second sequence sending mode according to the first sequence, wherein the first sequence indicated by the second sequence sending mode is the first sequence.

9. The method of claim 8, wherein the receiving the first sequence transmitted by the second communication device comprises:

monitoring a sequence sent by the second communication device according to a first period, wherein the first sequence is the sequence monitored in the first period; the first period is an interval between two adjacent monitoring, and is greater than or equal to the sending duration of the first signal.

10. The method according to any one of claims 1-9, wherein the second sequence transmission mode is a sequence transmission mode corresponding to a second communication device, including:

the second sequence transmission mode is a sequence transmission mode used by the second communication device; or the second sequence transmission mode is a sequence transmission mode after cyclic shift of a sequence transmission mode used by the second communication device.

11. The method according to any one of claims 1-10, further comprising:

Receiving an echo signal of the first signal;

performing autocorrelation operation according to the echo signal and the first signal;

and determining the distance between the first communication device and the target object according to the result of the autocorrelation operation.

12. The method according to any of claims 1-11, wherein the first communication device is a radar or the first communication device is a terminal device or a network device with radar functionality.

13. The method according to any of claims 1-12, wherein the first signal is a signal for radar ranging.

14. The method of any one of claims 1-13, wherein the N sequences comprise one of the following: an M sequence, a Gold sequence, a golay complementary pair GCP sequence, or an ipatv sequence.

15. A communication device, the communication device comprising a processor; the processor configured to execute a computer program or instructions to cause the communication device to perform the method of any of claims 1-14.

16. A computer readable storage medium storing computer instructions or a program which, when run on a computer, cause the method of any one of claims 1-14 to be performed.

17. A computer program product, the computer program product comprising computer instructions; when executed on a computer, some or all of the computer instructions cause the method of any one of claims 1-14 to be performed.