CN106034329B

CN106034329B - A kind of method for transmitting signals and device

Info

Publication number: CN106034329B
Application number: CN201510102730.7A
Authority: CN
Inventors: 秦飞; 谌丽; 焦斌
Original assignee: China Academy of Telecommunications Technology CATT
Current assignee: China Academy of Telecommunications Technology CATT; Datang Mobile Communications Equipment Co Ltd
Priority date: 2015-03-09
Filing date: 2015-03-09
Publication date: 2019-09-17
Anticipated expiration: 2035-03-09
Also published as: CN106034329A

Abstract

The invention discloses a kind of method for transmitting signals and devices.Its method includes: to obtain to carry out at least two resource units used in signal transmission, and there are frequency intervals between any two of them resource unit；The signal after coding is sent at least two resource unit.Signal is transmitted in the multiple frequency resources for being more than the coherence bandwidth for being sent to received wireless channel, on the basis of not increasing propagation delay time, improves transmission reliability by technical solution provided in an embodiment of the present invention.In addition, being spatially uncorrelated due to not needing to meet, compact apparatus can be applied to.

Description

Signal transmission method and device

Technical Field

The present invention relates to the field of wireless communication technologies, and in particular, to a signal transmission method and apparatus.

Background

In order to achieve reliability of end-to-end transmission, the existing method mainly includes:

method 1, Automatic Repeat reQuest (ARQ) and hybrid Automatic Repeat reQuest (HARQ):

ARQ adds check bit in the information bit of transmission data, the receiving end can judge whether the data is received correctly and feed back to the sending end. If an erroneous transmission occurs, the transmitting end retransmits the data until it is received correctly or times out. HARQ uses different redundancy versions for each transmission, which can bring coding combining gain, and can further improve the correct probability of transmission.

The method 1 can ensure that the accuracy of the data reaches the preset requirement, but the repeated confirmation and retransmission can bring transmission delay, and is suitable for services which are not sensitive to time delay.

Method 2, time diversity transmission:

the channels of a wireless mobile communication system often have fading effects in time, and signals attenuate differently at different times, which is prone to errors if the signals are transmitted during deep fading. The signals can be dispersed to different time slices for transmission, so that the influence of deep attenuation is overcome, and the transmission reliability is improved. To ensure the effect of time diversity, a necessary time interval is required between transmissions, preferably exceeding the channel correlation time, thereby also increasing the delay for reliable transmission.

Method 3, space diversity transmission:

the spatial decomposition transmission utilizes the irrelevance of the receiving and transmitting end channels at different positions to respectively or jointly transmit signals on a plurality of receiving or transmitting antennas, thereby improving the correctness of data packet transmission. Common spatial diversity is, for example, Rake receiver (a final receiver that separates multipath signals and efficiently combines the multipath signal energy), Multiple-Input Multiple-Output (MIMO), etc.

Method 4, channel redundancy coding:

the channel redundancy coding generates redundancy coding of redundant original signals according to a certain rule by the signals, and then the receiving end decodes according to an equivalent rule, so that when a small amount of bit information transmission errors occur, the receiving end can correct the transmission errors correctly.

In the future 5G services, some services require extremely high reliability and extremely low time delay. The above methods 1 and 2 require repeated transmission for many times, and cannot meet the delay requirement. Taking LTE system as an example, the subframe length of the system is 1ms, the round-trip transmission delay from transmission to reception is usually 3ms or more, in order to ensure correct acknowledgement, 1 retransmission needs to wait for about 4ms, and in order to achieve the necessary block error rate, 3 retransmissions need to wait for 12ms or more, which is much larger than the requirement of 5G service for delay.

The method 3 requires that the channel is completely uncorrelated in space, and a large distance is required to be kept between a plurality of transmitting or receiving antennas, which brings difficulties to the miniaturization of mobile communication system equipment, the engineering installation of a base station and the like, so that the number of system antennas cannot be designed into too many uncorrelated antennas, and the method 3 is not suitable for the future 5G service.

The method 4 has a certain error correction capability for resisting errors caused by channel fading, but on one hand, the redundancy is too high, the transmission efficiency of the system is low, on the other hand, the error correction capability of channel coding is limited, the block error rate of 10-6 orders of magnitude below is difficult to guarantee in fading channels, and particularly, when a user channel is always in a deep fading period, the errors are difficult to correct, and the requirement of 5G services on reliability cannot be met.

Disclosure of Invention

The invention aims to provide a signal transmission method and a signal transmission device, which are used for solving the problems that the prior art cannot meet the requirements of extremely high reliability and extremely low time delay or cannot be applied to miniaturized equipment.

The purpose of the invention is realized by the following technical scheme:

a method of signal transmission, comprising:

a sending end acquires at least two resource units used for signal transmission, wherein a frequency interval exists between any two resource units;

and the transmitting end transmits the coded signals on the at least two resource units.

The method for acquiring at least two resource units used for signal transmission by a transmitting end includes:

the sending end determines the coherent bandwidth of the wireless channel sent to the receiving end according to the time delay expansion of the signal transmission;

the method comprises the steps that a sending end determines the number of resource units used for signal transmission according to the requirement of 1-time transmission error probability of signal transmission, so that the sum of the first-time transmission error probability of signal transmission according to the determined number of the resource units does not exceed the requirement of the 1-time transmission error probability, and the number of the resource units is an integer not less than 2;

and the sending end acquires the resource units used for signal transmission according to the total system bandwidth, the coherent bandwidth of the wireless channel sent to the receiving end and the number of the resource units.

The method for determining the coherent bandwidth of the wireless channel transmitted to the receiving by the transmitting end according to the time delay expansion of the signal transmission comprises the following steps:

the sending end determines time delay expansion by using historical information of signal transmission, and determines a coherent bandwidth sent to a received wireless channel according to the time delay expansion; or,

a sending end determines time delay expansion by using a pilot signal sent by a receiving end, and determines a coherent bandwidth sent to a received wireless channel according to the time delay expansion; or,

a sending end sends a pilot signal to a receiving end and receives a coherent bandwidth of a wireless channel fed back by the receiving end and sent to the receiving end; the coherent bandwidth of the wireless channel sent to the receiver is determined and fed back by the receiver according to the pilot signal.

The method for determining the number of resource units used for signal transmission by the sending end according to the requirement of 1 transmission error probability of signal transmission includes:

the sending end estimates the error probability of single carrier transmission;

and the sending end determines the number of resource units used for signal transmission according to the error probability requirement of the 1-time transmission and the error probability of the single-carrier transmission.

The method for determining the number of resource units used for signal transmission by the transmitting end according to the error probability requirement of the 1-time transmission and the error probability of the single-carrier transmission comprises the following steps:

the sending end determines the number n of resource units used for signal transmission according to the following formula:

the error probability requirement of 1-time transmission is p1, and the error probability of single-carrier transmission is p2, 1> p2> p 1.

The method for estimating the error probability of single-carrier transmission by the transmitting end comprises the following steps:

the method comprises the steps that a sending end carries out cyclic redundancy coding on a signal to be sent, and the error probability of single carrier transmission is estimated based on the coding redundancy degree; or,

and the sending end estimates the error probability of single carrier transmission according to the historical statistical result of the error probability of signal transmission.

the sending end determines the number of resource units used for signal transmission according to the probability requirement of 1 transmission error of signal transmission and the limitation of the transmission quantity of a single resource unit.

The method for acquiring the resource units used for signal transmission by the sending end according to the total system bandwidth, the coherent bandwidth of the wireless channel sent to the receiving end and the number of the resource units includes:

the sending end compares the ratio of the total system bandwidth to the number of the resource units with the coherent bandwidth of the wireless channel sent to the receiving end;

the sending end determines the frequency interval of two adjacent resource units used for signal transmission according to the comparison result;

and the sending end acquires the resource units used for signal transmission according to the frequency interval and the number of the resource units.

The sending end determines the frequency interval of two adjacent resource units used for signal transmission according to the comparison result, and the method comprises the following steps:

if the coherent bandwidth of the wireless channel to be sent to the receiver is not less than the ratio of the total system bandwidth to the number of the resource units, the sending end determines the frequency interval of two adjacent resource units used for signal transmission as the coherent bandwidth of the wireless channel to be sent to the receiver;

and if the coherent bandwidth of the wireless channel transmitted and received is less than the ratio of the total bandwidth of the system to the number of the resource units, the transmitting end determines the frequency interval of two adjacent resource units used for signal transmission as the ratio.

Based on any of the above method embodiments, where the sending end sends the encoded signal on the at least two resource units, the method includes:

the transmitting end disperses the coded signals on the at least two resource units for transmission; or,

and the transmitting end repeatedly transmits the coded signals on the at least two resource units.

Before the sending end sends the encoded signal on the at least two resource units, the method further includes:

and the transmitting end informs the receiving end of at least two resource units and the coding mode of the signal used for signal transmission.

Based on any of the above method embodiments, wherein the frequency interval between any two resource units is not less than the coherence bandwidth of the wireless channel transmitted to the receiver.

A method of signal transmission, comprising:

a receiving end acquires at least two resource units used for signal transmission, wherein a frequency interval exists between any two resource units;

and the receiving end receives the coded signals on the at least two resource units.

Wherein, the receiving end obtains at least two resource units used for signal transmission, including:

the receiving end determines the coherent bandwidth of the wireless channel sent to the receiving end according to the time delay expansion of the signal transmission;

the receiving end determines the number of resource units used for signal transmission according to the requirement of 1-time transmission error probability of signal transmission, so that the sum of the first-time transmission error probability of signal transmission according to the determined number of resource units does not exceed the requirement of 1-time transmission error probability, and the number of the resource units is an integer not less than 2;

and the receiving end acquires the resource units used for signal transmission according to the total system bandwidth, the coherent bandwidth of the wireless channel sent to the receiving end and the number of the resource units.

Wherein, the receiving end determines the coherent bandwidth of the wireless channel according to the delay spread of the signal transmission, including:

the receiving end determines the time delay expansion by using the historical information of signal transmission, and determines the coherent bandwidth sent to the received wireless channel according to the time delay expansion; or,

the receiving end determines the time delay expansion by using the pilot signal sent by the sending end, and determines the coherent bandwidth sent to the received wireless channel according to the time delay expansion.

Wherein, the method also comprises:

and the receiving end feeds back the coherent bandwidth of the wireless channel sent to the receiving end to the sending end.

The receiving end determines the number of resource units used for signal transmission according to the requirement of 1-time transmission error probability of signal transmission, and the method comprises the following steps:

the receiving end estimates the error probability of single carrier transmission;

and the receiving end determines the number of resource units used for signal transmission according to the error probability requirement of the 1-time transmission and the error probability of the single-carrier transmission.

The method for acquiring the resource units used for signal transmission by the receiving end according to the total system bandwidth, the coherent bandwidth of the wireless channel sent to the receiving end and the number of the resource units includes:

the receiving end compares the ratio of the total system bandwidth to the number of the resource units with the coherent bandwidth of the wireless channel sent to the receiving end;

the receiving end determines the frequency interval of two adjacent resource units used for signal transmission according to the comparison result;

and the receiving end acquires the resource units used for signal transmission according to the frequency interval and the number of the resource units.

Wherein, the receiving end determines the frequency interval of two adjacent resource units used for signal transmission according to the comparison result, including:

if the coherent bandwidth of the wireless channel to be transmitted to the receiver is not less than the ratio of the total system bandwidth to the number of the resource units, the receiving end determines the frequency interval of two adjacent resource units used for signal transmission as the coherent bandwidth of the wireless channel to be transmitted to the receiver;

if the coherent bandwidth of the wireless channel sent to the receiving end is smaller than the ratio of the total system bandwidth to the number of the resource units, the receiving end determines that the frequency interval of two adjacent resource units used for signal transmission is the ratio.

The method for acquiring at least two resource units used for signal transmission by a receiving end includes:

and the receiving end acquires at least two resource units used for signal transmission according to the notification of the transmitting end.

Based on any of the above method embodiments, wherein the method further comprises:

and the receiving end acquires the coding mode of the signal according to the notification of the transmitting end.

Based on the same inventive concept as the method, an embodiment of the present invention further provides a signal transmission apparatus, including:

a resource unit obtaining module, configured to obtain at least two resource units used for signal transmission, where a frequency interval between any two resource units is not less than a coherence bandwidth of a wireless channel transmitted to a receiver;

and the signal sending module is used for sending the coded signals on the at least two resource units.

Wherein the resource unit obtaining module is configured to:

determining a coherent bandwidth of a wireless channel transmitted to a receiver according to the delay spread of signal transmission;

determining the number of resource units used for signal transmission according to the 1-time transmission error probability requirement of the signal transmission, so that the sum of the first transmission error probabilities of the signal transmission according to the determined number of the resource units does not exceed the 1-time transmission error probability requirement, wherein the number of the resource units is an integer not less than 2;

and acquiring the resource units used for signal transmission according to the total system bandwidth, the coherent bandwidth of the wireless channel sent to the receiving and the number of the resource units.

Wherein, when determining the coherent bandwidth of the wireless channel to be transmitted to the receiver according to the delay spread of the signal transmission, the resource unit obtaining module is configured to:

determining time delay expansion by using historical information of signal transmission, and determining a coherent bandwidth sent to a received wireless channel according to the time delay expansion; or,

determining time delay expansion by using a pilot signal sent by a receiving end, and determining a coherent bandwidth sent to a received wireless channel according to the time delay expansion; or,

sending a pilot signal to a receiving end, and receiving a coherent bandwidth of a wireless channel sent to the receiving end and fed back by the receiving end; the coherent bandwidth of the wireless channel sent to the receiver is determined and fed back by the receiver according to the pilot signal.

Wherein, when determining the number of resource units used for signal transmission according to the requirement of 1 transmission error probability of signal transmission, the resource unit obtaining module is configured to:

estimating the error probability of single-carrier transmission;

and determining the number of resource units used for signal transmission according to the 1-time transmission error probability requirement and the error probability of single-carrier transmission.

Wherein, when determining the number of resource units used for signal transmission according to the 1-time transmission error probability requirement and the error probability of single-carrier transmission, the resource unit obtaining module is configured to:

the number n of resource units used for signal transmission is determined according to the following formula:

Wherein, when estimating the error probability of single carrier transmission, the resource unit obtaining module is configured to:

performing cyclic redundancy coding on a signal to be transmitted, and estimating the error probability of single-carrier transmission based on the coding redundancy degree; or,

and estimating the error probability of single-carrier transmission according to the historical statistical result of the error probability of signal transmission.

and determining the number of the resource units used for signal transmission according to the requirement of 1 transmission error probability of signal transmission and the limitation of the transmission quantity of a single resource unit.

Wherein, when acquiring the resource units used for signal transmission according to the total system bandwidth, the coherent bandwidth of the wireless channel sent to the receiving and the number of the resource units, the resource unit acquiring module is configured to:

comparing a ratio of the total system bandwidth to the number of resource units to the coherence bandwidth of the transmitted to received radio channel;

determining the frequency interval of two adjacent resource units used for signal transmission according to the comparison result;

and acquiring the resource units used for signal transmission according to the frequency interval and the number of the resource units.

Wherein, when determining the frequency interval of two adjacent resource units used for signal transmission according to the comparison result, the resource unit obtaining module is configured to:

if the coherence bandwidth of the wireless channel to be transmitted to the receiver is not less than the ratio of the total system bandwidth to the number of the resource units, determining the frequency interval of two adjacent resource units used for signal transmission as the coherence bandwidth of the wireless channel to be transmitted to the receiver;

and if the coherence bandwidth of the wireless channel transmitted to the receiver is less than the ratio of the total system bandwidth to the number of the resource units, determining the frequency interval of two adjacent resource units used for signal transmission as the ratio.

Based on any of the apparatus embodiments above, wherein the signal sending module is configured to:

dispersing the coded signals on the at least two resource units for transmission; or,

and repeatedly transmitting the coded signals on the at least two resource units.

Wherein, the system further comprises a configuration notification module, which is used for:

and informing the receiving end of at least two resource units used for signal transmission and the coding mode of the signal.

Based on any of the apparatus embodiments described above, the frequency spacing between any two resource units is not less than the coherence bandwidth of the wireless channel transmitted to the receiver.

Based on the same inventive concept as the method, an embodiment of the present invention further provides a base station, including: a processor, a transceiver, and a memory.

Wherein, the processor is used for reading the program in the memory and executing the following processes:

acquiring at least two resource units used for signal transmission, wherein a frequency interval exists between any two resource units;

transmitting, by the transceiver, the encoded signals on the at least two resource units;

the transceiver is used for receiving and transmitting data under the control of the processor;

the memory is used for storing data used by the processor to perform operations.

Wherein, when at least two resource units used for signal transmission are acquired, the processor is used for reading the program in the memory and executing the following processes:

Wherein, when determining the coherence bandwidth of the wireless channel to be transmitted to the receiver according to the delay spread of the signal transmission, the processor is configured to read a program in the memory and execute the following procedures:

When the number of resource units used for signal transmission is determined according to the probability requirement of 1 transmission error of signal transmission, the processor is used for reading a program in the memory and executing the following processes:

estimating the error probability of single-carrier transmission;

Wherein, when estimating the error probability of a single-carrier transmission, the processor is configured to read the program in the memory and execute the following processes:

When acquiring the resource units used for signal transmission according to the total system bandwidth, the coherent bandwidth of the wireless channel sent to the receiver and the number of the resource units, the processor is configured to read a program in a memory and execute the following processes:

Wherein, when determining the frequency interval between two adjacent resource units used for signal transmission according to the comparison result, the processor is configured to read the program in the memory and execute the following processes:

Based on any of the above embodiments of the base station, wherein the processor is further configured to read a program in the memory, perform the following:

Wherein, the processor is also used for reading the program in the memory and executing the following processes:

Based on any of the above embodiments of the base station, wherein the frequency interval between any two resource units is not less than the coherence bandwidth of the wireless channel transmitted to the receiver.

a resource unit obtaining module, configured to obtain at least two resource units used for signal transmission, where a frequency interval exists between any two resource units;

and a signal receiving module, configured to receive the encoded signal on the at least two resource units.

Wherein the resource unit obtaining module is configured to:

and acquiring at least two resource units used for signal transmission according to the notification of the sending end.

The device further comprises a coding mode acquisition module, which is used for:

and acquiring the coding mode of the signal according to the notification of the sending end.

The method according to any of the above embodiments, wherein a frequency interval between any two resource units is not less than a coherence bandwidth of a radio channel transmitted to a receiver.

Based on the same inventive concept as the method, an embodiment of the present invention further provides a terminal, including: a processor, a transceiver, and a memory.

receiving, by the transceiver, the encoded signals on the at least two resource units;

Wherein the frequency spacing between any two resource units is not less than the coherence bandwidth of the wireless channel being transmitted to the receiver.

The technical scheme provided by the embodiment of the invention transmits the signal on a plurality of frequency resources exceeding the coherent bandwidth of the wireless channel to be transmitted and received, and improves the transmission reliability on the basis of not increasing the transmission delay. In addition, since it is not necessary to satisfy spatial uncorrelation, it can be applied to a miniaturized device.

Drawings

Fig. 1 is a flowchart of a method of a sending end according to an embodiment of the present invention;

fig. 2 is a flowchart of another sending-end method according to an embodiment of the present invention;

fig. 3 is a flowchart of a receiving end method according to an embodiment of the present invention;

fig. 4 is a schematic diagram of a signal transmission apparatus according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a base station according to an embodiment of the present invention;

fig. 6 is a schematic diagram of another signal transmission apparatus according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a terminal according to an embodiment of the present invention.

Detailed Description

With the development of mobile communication, the system bandwidth is wider and wider, for example, 4G LTE adopts a system design with a basic bandwidth of 20 MHz. In the wireless propagation process of the signal, fading of the signal is represented by frequency domain fading in addition to time domain fading and spatial fading. The frequency domain fading period of the signal is inversely proportional to the delay spread of the wireless channel. For example, in an urban channel environment, the root mean square value of its delay spread is 2(us), and the corresponding coherence bandwidth transmitted to the received radio channel is 500 (KHz). That is, when the signal is transmitted at frequency point F1 and frequency point F1+500KHz, the channel fading characteristics are almost uncorrelated. Therefore, in order to improve the reliability of a single transmission in time, the scheme provided by the embodiment of the invention transmits signals on a plurality of resource units with irrelevant frequencies.

The technical solutions provided by the embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Fig. 1 is a flowchart of a signal transmission method according to an embodiment of the present invention, which specifically includes the following operations:

step 100, a sending end obtains at least two resource units used for signal transmission, wherein a frequency interval exists between any two resource units.

Step 110, the transmitting end transmits the encoded signal on the at least two resource units.

The technical scheme provided by the embodiment of the invention adopts frequency diversity transmission to transmit signals on a plurality of frequency resources exceeding the coherent bandwidth of the wireless channel transmitted to the receiver, and improves the transmission reliability on the basis of not increasing the transmission time delay. In addition, since it is not necessary to satisfy spatial uncorrelation, it can be applied to a miniaturized device.

Wherein, preferably, the frequency interval between any two resource units is not less than the coherence bandwidth of the wireless channel transmitted to the receiver.

In step 110, the encoded signal may be dispersed over the at least two resource units and transmitted; the encoded signal may be repeatedly transmitted on the at least two resource elements.

The implementation manner of the step 100 may be:

the sending end determines the number of resource units used for signal transmission according to the requirement of 1 transmission error probability of signal transmission, so that the sum of the first transmission error probability of signal transmission according to the determined number of resource units does not exceed the requirement of 1 transmission error probability, and the number of resource units is an integer not less than 2;

The sending end determines the coherent bandwidth of the wireless channel sent to the receiving end according to the time delay expansion of the signal transmission, and the specific implementation modes of the sending end are various. For example, the sending end determines the delay spread by using the historical information of signal transmission, and determines the coherent bandwidth of the wireless channel sent to the receiving end according to the delay spread; or, the sending end determines the time delay expansion by using the pilot signal sent by the receiving end, and determines the coherent bandwidth of the wireless channel sent to the receiving end according to the time delay expansion; or, the sending end sends a pilot signal to the receiving end and receives the coherent bandwidth sent to the received wireless channel, which is fed back by the receiving end, wherein the coherent bandwidth sent to the received wireless channel is determined and fed back by the receiving end according to the pilot signal.

Since the coherence bandwidth of the wireless channel transmitted to the receiver is approximately equal to the inverse of the maximum multipath delay. Thus, the time delay spread of the signal transmission can be used to estimate the coherence bandwidth of the wireless channel sent to the receiver. For example, the Root Mean Square (RMS) value of the delay spread of a signal transmission is 2(us), then the corresponding coherence bandwidth of the transmitted to received wireless channel is approximately 500 (KHz).

Wherein, the requirement of 1 transmission error probability can be determined according to the practical application scenario. The number of resource units used for signal transmission is determined according to the requirement of 1 transmission error probability of signal transmission, and various implementation modes are available. For example: estimating the error probability of single-carrier transmission; and determining the number of resource units used for signal transmission according to the error probability requirement of 1-time transmission and the error probability of single-carrier transmission. This implementation is particularly useful in scenarios where the encoded data is repeatedly transmitted over multiple resource units. Correspondingly, the number of the resource units is the number of times of repeated transmission. Assuming a single-carrier transmission with an error probability of P, the cumulative error probability of a transmission over n uncorrelated frequencies is at least PⁿThe 1 transmission error probability requirement is P'. Then P can be converted toⁿAnd taking the value of n closest to but not more than P' as the number of the resource units.

In particular, if repeated transmission over multiple resource units is employed, then:

the 1-time error probability requirement is p1, the single-carrier transmission error probability is p2, (1> p2> p1), and the number of repeated transmissions n meeting the 1-time error probability requirement is:

for another example, the number of resource units used for signal transmission is determined according to the requirement of 1 transmission error probability of signal transmission and the limitation of transmission amount of single resource unit. Specifically, the determined number of resource units can meet the requirement of the first error transmission probability, and the signal quantity transmitted on each resource unit does not exceed the limit of the single resource unit transmission quantity.

The specific implementation manner of estimating the error probability of a single-carrier transmission may be as follows: performing cyclic redundancy coding on a signal to be transmitted, and estimating the error probability of single-carrier transmission based on the coding redundancy degree; it can also be: and estimating the error probability of single-carrier transmission according to the historical statistical result of the error probability of signal transmission.

The resource units used for signal transmission are obtained according to the total system bandwidth, the coherent bandwidth of the wireless channel sent to the receiver, and the number of the resource units, and the implementation manner may be: comparing a ratio of the total system bandwidth to the number of resource units to the coherence bandwidth of the transmitted to received radio channel; determining the frequency interval of two adjacent resource units used for signal transmission according to the comparison result; and acquiring the resource units used for signal transmission according to the frequency interval and the number of the resource units.

Preferably, determining the frequency interval of two adjacent resource units used for signal transmission according to the comparison result includes: if the coherence bandwidth of the wireless channel to be transmitted to the receiver is not less than the ratio of the total system bandwidth to the number of the resource units, determining the frequency interval of two adjacent resource units used for signal transmission as the coherence bandwidth of the wireless channel to be transmitted to the receiver; and if the coherence bandwidth of the wireless channel transmitted to the receiver is less than the ratio of the total system bandwidth to the number of the resource units, determining the frequency interval of two adjacent resource units used for signal transmission as the ratio.

For example, the total system bandwidth is N, the coherence bandwidth of a radio channel to be transmitted and received is W, the number of resource elements used for signal transmission is N, the frequency interval between two adjacent resource elements is D, and D > -W is required. To ensure better irrelevancy, the signal is spread over the entire system bandwidth as much as possible, i.e.: if W > is N/N, D is W; if W < N/N, D equals N/N.

The corresponding signal transmission flow can be as shown in fig. 2. The method comprises the steps of carrying out redundancy coding on an original information block to obtain a redundancy coding information block, splitting the redundancy coding information block into n resource blocks, and transmitting the n resource blocks in a scattered mode on n resource units.

Based on any of the above method embodiments, before step 110, the receiving end may also be notified of at least two resource units and the coding scheme of the signal used for signal transmission.

It should be noted that if the receiving end is not informed of at least two resource units used for signal transmission, the transmitting end and the receiving end determine the resource units in the same manner. If the coding mode of the signal is not informed to the receiving end, the transmitting end codes according to the coding mode appointed with the receiving end.

Fig. 3 is a flowchart of a signal transmission method according to an embodiment of the present invention, which specifically includes the following operations:

step 300, the receiving end obtains at least two resource units used for signal transmission, wherein a frequency interval exists between any two resource units.

Preferably, the frequency spacing between any two resource units is not less than the coherence bandwidth of the wireless channel being transmitted to the receiver.

In step 310, the receiving end receives the encoded signal on the at least two resource units.

The implementation manner of step 300 may refer to the implementation manner of step 100 in the above embodiment, and repeated details are not repeated.

The specific implementation manner of determining the coherent bandwidth of the wireless channel to be transmitted to the receiver according to the delay spread of the signal transmission is various. Reference may be made specifically to the description of the above-described transmitting-end embodiment. But in step 300, if the coherent bandwidth transmitted to the received radio channel is determined based on the pilot signal transmitted by the transmitting end. Specifically, the delay spread is determined according to the pilot signal, and then the coherence bandwidth of the wireless channel transmitted to the receiver is determined according to the delay spread. On this basis, the coherent bandwidth of the wireless channel sent to the receiver can also be fed back to the sender.

The number of resource units used for signal transmission is determined according to the requirement of 1 transmission error probability of signal transmission, and various implementation manners are available. For example: acquiring the error probability of single-carrier transmission; and determining the number of resource units used for signal transmission according to the error probability requirement of 1-time transmission and the error probability of single-carrier transmission. This implementation is particularly useful in scenarios where the encoded data is repeatedly transmitted over multiple resource units.

The specific implementation manner of obtaining the error probability of a single carrier transmission may be: receiving the error probability of single-carrier transmission sent by a sending end; it can also be: and estimating the error probability of single-carrier transmission according to the historical statistical result of the error probability of signal transmission.

Preferably, determining the frequency interval of two adjacent resource units used for signal transmission according to the comparison result includes: if the coherence bandwidth of the wireless channel to be transmitted to the receiver is not less than the ratio of the total system bandwidth to the number of the resource units, determining the frequency interval of two resource units used for signal transmission as the coherence bandwidth of the wireless channel to be transmitted to the receiver; and if the coherence bandwidth of the wireless channel transmitted to the receiver is less than the ratio of the total system bandwidth to the number of the resource units, determining the frequency interval of the two resource units used for signal transmission as the ratio.

In addition to the implementation manner in step 100, in step 300, at least two resource units used for signal transmission may also be acquired according to the notification from the transmitting end.

Based on any of the above method embodiments, optionally, the method further includes: and acquiring the coding mode of the signal according to the notification of the sending end.

Based on the same inventive concept as the method, an embodiment of the present invention further provides a signal transmission apparatus, as shown in fig. 4, including:

a resource unit obtaining module 401, configured to obtain at least two resource units used for signal transmission, where a frequency interval exists between any two resource units;

a signal sending module 402, configured to send the encoded signal on the at least two resource units.

Wherein the resource unit obtaining module is configured to:

estimating the error probability of single-carrier transmission;

Wherein the signal sending module is configured to:

Based on the same inventive concept as the method, an embodiment of the present invention further provides a base station, as shown in fig. 5, including: a processor 500, a transceiver 501, and a memory 520.

The processor 500 is configured to read a program in the memory 520, and execute the following processes:

transmitting, by the transceiver 510, the encoded signal on the at least two resource units;

the transceiver 510 is used for receiving and transmitting data under the control of the processor;

the memory 520 is used to hold data used by the processor to perform operations.

Wherein in fig. 5, the bus architecture may include any number of interconnected buses and bridges, with one or more processors, represented by processor 500, and various circuits, represented by memory 520, being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 510 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium. The processor 500 is responsible for managing the bus architecture and general processing, and the memory 520 may store data used by the processor 500 in performing operations.

Based on the same inventive concept as the method, an embodiment of the present invention further provides a signal transmission apparatus, as shown in fig. 6, including:

a resource unit obtaining module 601, configured to obtain at least two resource units used for signal transmission, where a frequency interval exists between any two resource units;

a signal receiving module 602, configured to receive the encoded signal on the at least two resource units.

Wherein the resource unit obtaining module is configured to:

Based on the same inventive concept as the method, an embodiment of the present invention further provides a terminal, as shown in fig. 7, including: a processor 700, a transceiver 710, and a memory 720.

The processor 700 is configured to read the program in the memory 720, and execute the following processes:

receiving, by the transceiver 710, the encoded signal on the at least two resource units;

the transceiver 710 for receiving and transmitting data under the control of the processor 700;

memory 720 is used to store data used by processor 700 to perform operations.

Where in fig. 7, the bus architecture may include any number of interconnected buses and bridges, with various circuits being linked together, particularly one or more processors represented by processor 700 and memory represented by memory 720. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 710 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium. The user interface 730 may also be an interface capable of interfacing with a desired device for different user devices, including but not limited to a keypad, display, speaker, microphone, joystick, etc.

The processor 700 is responsible for managing the bus architecture and general processing, and the memory 720 may store data used by the processor 700 in performing operations.

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. A signal transmission method, comprising:

the transmitting end transmits the coded signals on the at least two resource units;

the method for acquiring at least two resource units used for signal transmission by the sending end includes:

2. The method of claim 1, wherein the determining, by the transmitting end, the coherence bandwidth of the wireless channel transmitted to the receiving according to the delay spread of the signal transmission comprises:

the sending end sends pilot signals to the receiving end and receives the coherent bandwidth of the wireless channel fed back by the receiving end and sent to the receiving end.

3. The method of claim 1, wherein the determining, by the sending end, the number of resource units used for signal transmission according to the requirement of 1 transmission error probability of signal transmission comprises:

the sending end estimates the error probability of single carrier transmission;

4. The method of claim 3, wherein the determining, by the transmitting end, the number of resource units used for signal transmission according to the error probability requirement of 1 transmission and the error probability of a single-carrier transmission comprises:

5. The method of claim 3, wherein the transmitting end estimates the error probability of a single-carrier transmission, comprising:

6. The method of claim 1, wherein the determining, by the sending end, the number of resource units used for signal transmission according to the requirement of 1 transmission error probability of signal transmission comprises:

7. The method of claim 1, wherein a transmitting end obtains resource units used for signal transmission according to a total system bandwidth, a coherence bandwidth of the wireless channel transmitted to a receiving end, and the number of the resource units, and the method comprises:

8. The method of claim 7, wherein determining, by the sending end, the frequency interval of two adjacent resource units used for signal transmission according to the comparison result comprises:

9. The method according to any one of claims 1 to 8, wherein the transmitting end transmits the encoded signal on the at least two resource units, and comprises:

10. The method of claim 9, wherein before the transmitting end transmits the encoded signal on the at least two resource units, the method further comprises:

the transmitting end informs the receiving end of at least two resource units and the coding mode of the signal used for signal transmission.

11. The method of any of claims 1-8, wherein a frequency separation between any two resource units is not less than a coherence bandwidth of a wireless channel transmitted to a receiver.

12. A signal transmission method, comprising:

the receiving end receives the coded signals on the at least two resource units;

13. The method of claim 12, wherein the determining, by the receiving end, the coherence bandwidth of the wireless channel transmitted to the receiving end based on the delay spread of the signal transmission comprises:

14. The method of claim 13, further comprising:

15. The method of claim 12, wherein the determining, by the receiving end, the number of resource units used for signal transmission according to the 1 transmission error probability requirement of the signal transmission comprises:

16. The method of claim 12, wherein the receiving end obtains the resource units used for signal transmission according to the total system bandwidth, the coherence bandwidth of the wireless channel sent to the receiving end, and the number of the resource units, and comprises:

17. The method of claim 15, wherein determining, at the receiving end, the frequency interval of two adjacent resource units used for signal transmission according to the comparison result comprises:

18. The method of claim 12, wherein acquiring at least two resource units used for signal transmission at a receiving end comprises:

the receiving end obtains at least two resource units used for signal transmission according to the notification of the transmitting end.

19. The method of any one of claims 12 to 18, further comprising:

20. The method of any of claims 12-18, wherein a frequency separation between any two resource units is not less than a coherence bandwidth of a wireless channel transmitted to a receiver.

21. A signal transmission apparatus, comprising:

a signal sending module, configured to send the encoded signal on the at least two resource units; wherein the resource unit obtaining module is configured to:

22. The apparatus of claim 21, wherein when determining the coherence bandwidth of the wireless channel transmitted to the receiver according to the delay spread of the signal transmission, the resource unit obtaining module is configured to:

23. The apparatus of claim 21, wherein when determining the number of resource units used for signal transmission according to 1 transmission error probability requirement of signal transmission, the resource unit obtaining module is configured to:

estimating the error probability of single-carrier transmission;

24. The apparatus of claim 23, wherein when determining the number of resource units used for signal transmission according to the 1-time transmission error probability requirement and the error probability of the single-carrier transmission, the resource unit obtaining module is configured to:

25. The apparatus of claim 23, wherein the resource unit obtaining module, when estimating the error probability of a single-carrier transmission, is configured to:

26. The apparatus of claim 21, wherein when determining the number of resource units used for signal transmission according to 1 transmission error probability requirement of signal transmission, the resource unit obtaining module is configured to:

27. The apparatus of claim 21, wherein when the resource units used for signal transmission are obtained according to a total system bandwidth, the coherence bandwidth of the wireless channel sent to the receiver, and the number of resource units, the resource unit obtaining module is configured to:

28. The apparatus of claim 27, wherein when determining the frequency interval between two adjacent resource units used for signal transmission according to the comparison result, the resource unit obtaining module is configured to:

29. The device according to any one of claims 21 to 28, wherein the signal transmission module is configured to:

30. The apparatus of claim 29, further comprising a configuration notification module configured to:

31. The apparatus of any of claims 21-28, wherein a frequency separation between any two resource units is not less than a coherence bandwidth of a wireless channel transmitted to a receiver.

32. A signal transmission apparatus, comprising:

a signal receiving module, configured to receive the encoded signal on the at least two resource units;

wherein the resource unit obtaining module is configured to:

33. The apparatus of claim 32, wherein the resource unit obtaining module is configured to:

34. The apparatus according to claim 32 or 33, further comprising a coding mode obtaining module, configured to:

35. The apparatus of claim 32 or 33, wherein a frequency separation between any two resource units is not less than a coherence bandwidth of a wireless channel transmitted to a receiver.