WO2017210872A1

WO2017210872A1 - Electromagnetic communication based dense frequency division multiplexing method and device

Info

Publication number: WO2017210872A1
Application number: PCT/CN2016/085205
Authority: WO
Inventors: 张科峰
Original assignee: 武汉芯泰科技有限公司
Priority date: 2016-06-08
Filing date: 2016-06-08
Publication date: 2017-12-14

Abstract

Disclosed is an electromagnetic communication based dense frequency division multiplexing method and device. The electromagnetic communication based dense frequency division multiplexing method comprises: S1, segmenting a total bandwidth for transmitting an electromagnetic signal into a plurality of sub-bands, wherein the number of sub-bands is not less than 128. By means of the electromagnetic communication based dense frequency division multiplexing method, a limited bandwidth can be segmented into more sub-bands, so that the density degree of the sub-bands is increased to increase the effective utilization rate of a total frequency band, and the communication rate is increased.

Description

Description: A dense frequency division multiplexing method and device based on electromagnetic wave communication

[0001] The present invention relates to the field of frequency division multiplexing technologies, and in particular, to a dense frequency division multiplexing method and apparatus based on electromagnetic wave communication.

Background technique

[0002] Frequency Division Multiplexing (FDM) divides the total bandwidth used for transmitting signals into several sub-bands (or sub-channels), and each sub-channel transmits one signal. The frequency division multiplexing requires that the total frequency width is greater than the sum of the frequency of each subchannel, and in order to ensure that the signals transmitted in each subchannel do not interfere with each other, an isolation band should be established between each subchannel, thus ensuring each signal. Do not interfere with each other. In the prior art, the frequency division multiplexing subband division still stays in a very thick phase, and the total bandwidth utilization is still relatively low. Although the Orthogonal Frequency Division Multiplexing (OFDM) technology eliminates the isolation band, the utilization of the total bandwidth is improved to a certain extent. However, the division of each sub-band in Orthogonal Frequency Division Multiplexing is still very coarse. As user demand for video, voice, and data browsing grows, channel bandwidth has become an invaluable resource. In a sense, Orthogonal Frequency Division Multiplexing has increased the utilization of the total bandwidth to nearly 100% because no isolation bands are provided between the sub-bands. However, the utilization rate here is not equal to the effective utilization rate. Effective utilization refers to the ratio of the bandwidth used to transmit data to the total bandwidth. Regardless of the ordinary frequency division multiplexing technology or the orthogonal frequency division multiplexing technology, the effective utilization of bandwidth is still relatively low, because the division of the subband is relatively coarse, and the number of subbands that can be used for transmitting data is relatively large. Relatively small, some of the bandwidth in each sub-band is actually wasted.

[0003] Therefore, the prior art frequency division multiplexing technique has a defect that the band effective utilization rate is low.

technical problem

[0004] In view of the shortcomings of the frequency division multiplexing technology in the prior art that the frequency band effective utilization is low, the present invention provides a dense frequency division multiplexing method and apparatus.

Problem solution

Technical solution

[0005] The technical solution proposed by the present invention with respect to the above technical problems is as follows: [0006] In one aspect, a dense frequency division multiplexing method based on electromagnetic wave communication is provided, including:

[0007] Sl, the total bandwidth for transmitting the electromagnetic wave signal is divided into a plurality of sub-bands; the number of the sub-bands is not less than 128.

[0008] Preferably, the dense frequency division multiplexing method based on electromagnetic wave communication further includes the following steps:

[0009] S2, dividing each subband into an effective channel and an isolation band, where the effective channel is used for transmitting electromagnetic wave signals

The isolation strip is used to isolate signal interference between adjacent sub-bands.

[0010] Preferably, in each subband, the bandwidth of the effective channel is greater than the bandwidth of the isolation band.

[0011] Preferably, the dividing the total bandwidth for transmitting the electromagnetic wave signal into the plurality of sub-bands comprises:

[0012] The total bandwidth is divided into a plurality of sub-bands according to the transmission rate of the electromagnetic wave signal to be transmitted such that the bandwidth of each sub-band matches the transmission rate of the electromagnetic wave signal.

[0013] Preferably, the dividing the total bandwidth for transmitting the electromagnetic wave signal into the plurality of sub-bands further includes:

[0014] The total bandwidth is divided into a plurality of mutually orthogonal sub-bands using orthogonal frequency division multiplexing.

[0015] In another aspect, a dense frequency division multiplexing apparatus based on electromagnetic wave communication is provided, including: a bandwidth dividing unit, configured to divide a total bandwidth for transmitting an electromagnetic wave signal into a plurality of sub-bands; The number is not less than 128.

[0016] Preferably, the dense frequency division multiplexing device based on electromagnetic wave communication is characterized in that: further comprising: a subband dividing unit, configured to divide each subband into an effective channel and an isolation band, the effective channel For transmitting electromagnetic wave signals, the isolation band is used to isolate signal interference between adjacent sub-bands.

[0017] Preferably, in each subband, the bandwidth of the effective channel is greater than the bandwidth of the isolation band.

[0018] Preferably, the bandwidth dividing unit is further configured to:

[0019] The total bandwidth is divided into a plurality of sub-bands according to the transmission rate of the electromagnetic wave signal to be transmitted so that the bandwidth of each sub-band matches the transmission rate of the electromagnetic wave signal.

[0020] Preferably, the first bandwidth dividing unit is further configured to:

[0021] The total bandwidth is divided into a plurality of mutually orthogonal sub-bands using orthogonal frequency division multiplexing.

Advantageous effects of the invention

Beneficial effect

[0022] In implementing the embodiments of the present invention, the following beneficial effects are obtained: By performing dense frequency division multiplexing on the total bandwidth for electromagnetic wave signal transmission, the limited bandwidth can be divided into more sub-bands, thereby improving the sub-band The density of the band increases the effective utilization of the total frequency band, thereby increasing the communication rate. Brief description of the drawing

DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings to be used in the embodiments or the prior art description will be briefly described below, and obviously, in the following description The drawings are only some of the embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any creative work.

1 is a flowchart of a dense frequency division multiplexing method according to a first embodiment of the present invention;

2 is a schematic diagram of a dense frequency division multiplexing structure of a first embodiment provided by the present invention;

3 is a flowchart of a second embodiment dense frequency division multiplexing method provided by the present invention;

4 is a schematic diagram of a dense frequency division multiplexing structure of a second embodiment provided by the present invention;

5 is a flowchart of a third embodiment dense frequency division multiplexing method provided by the present invention;

6 is a flowchart of a dense frequency division multiplexing method according to a fourth embodiment of the present invention;

7 is a schematic diagram of a dense frequency division multiplexing structure of a fourth embodiment provided by the present invention;

8 is a block diagram showing the structure of a dense frequency division multiplexing apparatus according to a first embodiment of the present invention.

Embodiments of the invention

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. example. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

[0033] Embodiment 1

[0034] This embodiment provides a dense frequency division multiplexing method based on electromagnetic wave communication. Referring to FIGS. 1 and 2, the method includes:

[0035] Sl, dividing the total bandwidth for transmitting the electromagnetic wave signal into a plurality of sub-bands; the number of sub-bands is not less than 128

[0036] In the present application, each sub-band can be used separately, so that each sub-band is used to transmit one signal. The divided sub-bands can also be used together to transmit only one signal. Multiple sub-bands can be mixed Some sub-bands transmit one signal separately, and some sub-bands use one signal to transmit one.

[0037] In the prior art, the frequency division multiplexing technique divides the total bandwidth into several sub-bands, but with the existing frequency division multiplexing technology, the total bandwidth can only be divided into a very limited number of sub-bands. The existing frequency division multiplexing technology is still in a coarse phase for the division of the total bandwidth. In the prior art, the research and improvement direction of the frequency division multiplexing technology is how to reduce or even eliminate the isolation band in the frequency division multiplexing technology, thereby improving the bandwidth utilization of the frequency division multiplexing technology. Therefore, various orthogonal frequency division multiplexing techniques have been proposed after the frequency division multiplexing technique to eliminate the isolation band. However, there are no patents that focus research on how to increase the density of subbands. When the frequency division multiplexing technology develops to the Orthogonal Frequency Division Multiplexing (OFDM) technology, the bandwidth utilization of the frequency division multiplexing technology is theoretically 100%. For example, a 20MHz bandwidth is divided into three orthogonal subbands for transmitting three electromagnetic signals. It seems that the bandwidth is being used, but it is not. In many cases, the number of subbands (3) in the above examples often does not meet the actual needs. Under the existing technical enlightenment and teaching, it has been difficult to greatly increase the effective utilization of bandwidth. This application is aimed at this technical problem. It adopts a technical idea that is completely different from the prior art, and the total bandwidth is densely divided. The number of sub-bands can reach 128, or even 256, and even more 256. Can be 1024, or 2048, etc. The number of subbands can also be any natural number not less than 128. With this dense frequency division method, the width of the sub-bands can be as low as a few hertz.

As shown in FIG. 2, FIG. 2 illustrates splitting a total bandwidth of a finite width (eg, 20 MHz) into a plurality of very dense sub-bands (sub-band 1) using the dense frequency division multiplexing method provided by the present application. , subband 2, subband 3 ... subband n), the number of subbands may be hundreds or thousands, so that the smallest subband after division (such as subband 4) can be as low as a few hertz.

[0039] Of course, in other preferred embodiments provided by the present invention, the bandwidth of the n sub-bands may also be the same, that is, the total bandwidth is equally divided into n sub-bands. The subband division can also be divided into subbands with different bandwidths as shown in Fig. 2.

[0040] The dense frequency division multiplexing method provided by this embodiment provides a new design idea for how to improve the effective utilization of bandwidth. The dense frequency division multiplexing method provided by the present invention almost increases the effective utilization of the total bandwidth to its limit value, and substantially no idle and wasted bandwidth exists. By using a dense frequency division multiplexing method, the data communication rate can also be significantly improved.

Embodiment 2 [0042] This embodiment provides another dense frequency division multiplexing method based on electromagnetic wave communication. As shown in FIGS. 3 and 4, the method includes the following steps:

[0043] Sl l, dividing the total bandwidth for transmitting the electromagnetic wave signal into a plurality of sub-bands; the number of sub-bands is not less than 128

; as well as

[0044] S12, dividing each sub-band into an effective channel and an isolation band, the effective channel is used for transmitting electromagnetic wave signals, and the isolation band is used for isolating signal interference between adjacent sub-bands.

[0045] As shown in FIG. 4, FIG. 4 illustrates splitting a total bandwidth of a finite width (eg, 20 MHz) into a plurality of very dense sub-bands (sub-band 1) using the dense frequency division multiplexing method provided by the present application. Sub-band 2, sub-band 3 ... sub-band n), the number of sub-bands can reach 128, even 256, and even more 256, can also be 102 4, or 2048. The number of subbands can also be any natural number not less than 128. Each of the divided sub-bands is further divided into an effective channel and an isolation band. For example, the sub-band 1 is further divided into an effective channel 11 and an isolation band 12.

[0046] In this embodiment, the total bandwidth is BW, and the subband bandwidth is SW, and the number of subbands is n=BW/SW.

The isolation band bandwidth is GW and the effective channel bandwidth is CW. In the existing frequency division multiplexing technology, it is often just concerned about how the value of GW will be zero. Therefore, based on the frequency division multiplexing technology, many orthogonal frequency division multiplexing techniques have emerged. In the present application, the focus of attention is how to increase the value of n so that the value of SW/B W is close to zero, thereby achieving dense frequency division multiplexing.

[0047] Further, as shown in FIG. 4, in each subband, the bandwidth of the effective channel is greater than the bandwidth of the isolation band.

Furthermore, the bandwidth of the effective channel should be much larger than the bandwidth of the isolation band, so that the ratio of the temporary bandwidth of the isolation band is small, which is basically negligible, thereby improving the utilization of the bandwidth.

[0048] Embodiment 3

[0049] This embodiment provides another dense frequency division multiplexing method based on electromagnetic wave communication. As shown in FIG. 5, the method includes:

[0050] S21. The total bandwidth is divided into multiple sub-bandwidths according to a transmission rate of the electromagnetic wave signal to be transmitted, so that the bandwidth of each sub-bandwidth matches the transmission rate of the electromagnetic wave signal; the number of sub-bands is not less than 128.

[0051] The band division structure using the present frequency division multiplexing method can be as shown in 2. A total bandwidth of finite width (for example, 20MHz) is divided into a number of very dense sub-bands (subband 1, subband 2, subband 3... subband n), and the number of subbands can be up to 128, even 256, more 256, or 1024, or It is 2048 and so on. The number of subbands may also be any natural number not less than 128. The dense frequency division multiplexing method not only considers the dense multiplexing of the total bandwidth, but also considers the bandwidth requirement of the electromagnetic wave signals transmitted by each sub-band, and combines the two points to effectively utilize the frequency band and data transmission. The rate is further increased.

[0052] There may be various strategies for dividing the frequency band by dense frequency division multiplexing and based on the bandwidth requirements of the transmitted electromagnetic wave signals. For example, a certain density lower limit value may be set to preferentially satisfy the lower density limit. On the basis of the value, the bandwidth requirement of the transmission signal is satisfied. It is also possible to set a certain transmission rate lower limit value to meet the sub-band density requirement on the basis of preferentially satisfying the transmission rate lower limit value.

[0053] Further, as shown in FIG. 5, in a preferred embodiment provided by the present invention, the method may further include:

[0054] S22, dividing each subband into an effective channel and an isolation band, the effective channel is used for transmitting electromagnetic wave signals, and the isolation band is used for isolating signal interference between adjacent subbands.

[0055] The band division structure using the present frequency division multiplexing method can be as shown in FIG. A total bandwidth of finite width (for example, 20MHz) is divided into a number of very dense sub-bands (subband 1, subband 2, subband 3... subband n), and the number of subbands can be up to 128, even 256, and even more 256, can also be 1024, or 2048. The number of subbands can also be any natural number not less than 128. Each of the divided sub-bands is further divided into an effective channel and an isolation band. For example, the sub-band 1 is further divided into an effective channel 11 and an isolation band 12.

[0056] Embodiment 4

[0057] This embodiment provides another dense frequency division multiplexing method based on electromagnetic wave communication. As shown in FIG. 6, the method includes:

[0058] S31. The total bandwidth is divided into a plurality of mutually orthogonal subbands by orthogonal frequency division multiplexing; the number of subbands is not less than 128.

[0059] In this embodiment, the dense frequency division multiplexing and the orthogonal frequency division multiplexing are organically combined, and the isolation band in the subband is cancelled, thereby further improving the bandwidth utilization. As shown in FIG. 7, the dense frequency division multiplexing method provided in this embodiment divides a total bandwidth of a finite width (for example, 20 MHz) into a plurality of very dense sub-bands (subband 1, subband 2, and subband 3). ...subband n), the number of subbands can reach 128, even 256, and even more than 2 56, can also be 1024, or 2048. The number of subbands may also be any natural number not less than 128. And each sub-band that is segmented is orthogonal to each other, so the bandwidth of each sub-band is Effective channel, all used to transmit electromagnetic wave signals.

[0060] Therefore, in the present embodiment, the utilization of the bandwidth is substantially reached to the point where it cannot be improved any more. Certainly, in this embodiment, the division of the bandwidth between the mutually orthogonal sub-bands may be further divided according to the transmission rate of the electromagnetic wave signals to be transmitted, thereby fusing the three to obtain an optimal sub-band division scheme. .

Embodiment 5

[0062] This embodiment provides a dense frequency division multiplexing device 100 based on electromagnetic wave communication. As shown in FIG. 8, the device 100 includes:

[0063] The bandwidth dividing unit 11 is configured to divide the total bandwidth for transmitting the electromagnetic wave signal into a plurality of sub-bands; the number of sub-bands is not less than 128.

[0064] The apparatus 100 is configured to perform the dense frequency division multiplexing method in Embodiment 1. Therefore, the divided frequency band structure is as shown in Fig. 2. A total bandwidth of a finite width (for example, 20 MHz) is divided into a plurality of very dense sub-bands (sub-band 1, sub-band 2, sub-band 3... With n), the number of sub-bands can reach 128, or even 256, and even more 256, can also be 1024, or 2048. The number of subbands can also be any natural number not less than 128.

[0065] In the present application, each sub-band can be used separately, so that each sub-band is used to transmit one signal. Multiple sub-bands that are split can also be used together to transmit only one signal. The divided sub-bands can also be mixed, some sub-bands transmit one signal separately, and some sub-bands use one channel to transmit one signal.

[0066] The dense frequency division multiplexing device provided by this embodiment provides a new design idea for how to improve the effective utilization of bandwidth. The dense frequency division multiplexing device provided by the present invention almost increases the effective utilization of the total bandwidth to its limit value, and substantially no idle and wasted bandwidth exists. By using a dense frequency division multiplexing device, the data communication rate can also be significantly improved.

[0067] Further, as shown in FIG. 8, the apparatus 100 may further include a subband dividing unit 12, configured to divide each subband into an effective channel and an isolation band, the effective channel is used for transmitting electromagnetic wave signals, and the isolation band is used for Isolation of signal interference between adjacent subbands. As shown in Figure 4, a total bandwidth of finite width (for example, 20MHz) is divided into a number of very dense sub-bands (subband 1, subband 2, subband 3... subband n), and the number of subbands Up to 128, even 256, and even more 256, can also be 1024, or 2048. The number of subbands may also be any natural number not less than 128. And each sub-band separated is divided into The effective channel and the isolation band, for example, the sub-band 1 are again divided into an effective channel 11 and an isolation band 12.

[0068] Further, as shown in FIG. 4, in each subband, the bandwidth of the effective channel is greater than the bandwidth of the isolation band.

Further, the bandwidth dividing unit 11 is further configured to divide the total bandwidth into a plurality of sub-bands according to a transmission rate of the electromagnetic wave signal to be transmitted so that the bandwidth of each sub-band matches the transmission rate of the electromagnetic wave signal. As shown in 2, a total bandwidth of finite width (for example, 20MHz) is divided into a number of very dense sub-bands (subband 1, subband 2, subband 3, subband n), and the number of subbands may be There are hundreds of thousands, so that the smallest sub-band after segmentation (such as sub-band 4) can be as low as a few hertz. The bandwidth dividing unit 11 not only considers the dense multiplexing of the total bandwidth, but also considers the bandwidth requirement of the electromagnetic wave signal transmitted by each sub-band, and combines the two to further improve the effective utilization rate of the frequency band and the data transmission rate. improve.

[0070] Further, the sub-bandwidth dividing unit is further configured to divide the total bandwidth into a plurality of mutually orthogonal sub-bands by using orthogonal frequency division multiplexing. In this embodiment, the dense frequency division multiplexing and the orthogonal frequency division multiplexing are organically combined, and the isolation band in the subband is cancelled, thereby further improving the bandwidth utilization. As shown in FIG. 7, the dense frequency division multiplexing method provided in this embodiment divides a total bandwidth of a finite width (for example, 20 MHz) into a plurality of very dense sub-bands (subband 1, subband 2, and subband 3). ... subband n), the number of subbands may be hundreds or thousands, so that the divided subbands (such as subband 4) can be as low as a few hertz. Each of the divided sub-bands is orthogonal to each other, so the bandwidth of each sub-band is an effective channel, and all are used to transmit electromagnetic wave signals. Therefore, in the present embodiment, the utilization of the bandwidth is substantially reached to the point where it cannot be improved any more. Certainly, in this embodiment, the division of the bandwidth between the mutually orthogonal sub-bands may be further divided according to the transmission rate of the electromagnetic wave signals to be transmitted, thereby fusing the three to obtain an optimal sub-band division scheme. .

The above disclosure is only a preferred embodiment of the present invention, and of course, the scope of the present invention is not limited thereto, and those skilled in the art can understand all or part of the process of implementing the above embodiments, and Equivalent variations of the claims of the invention are still within the scope of the invention.

Claims

Claim

A dense frequency division multiplexing method based on electromagnetic wave communication, characterized in that it comprises the following steps:

Sl, the total bandwidth for transmitting the electromagnetic wave signal is divided into a plurality of sub-bands; the number of the sub-bands is not less than 128.

The dense frequency division multiplexing method based on electromagnetic wave communication according to claim 1, further comprising the steps of:

S2, dividing each subband into an effective channel for transmitting electromagnetic wave signals, and an isolation band for isolating signal interference between adjacent subbands.

The dense frequency division multiplexing method based on electromagnetic wave communication according to claim 2, wherein in each subband, a bandwidth of the effective channel is larger than a bandwidth of the isolation band. The dense frequency division multiplexing method based on electromagnetic wave communication according to claim 1, wherein the dividing the total bandwidth for transmitting the electromagnetic wave signal into a plurality of sub-bands comprises: according to a transmission rate of the electromagnetic wave signal to be transmitted The total bandwidth is divided into a plurality of sub-bands such that the bandwidth of each sub-band matches the transmission rate of the electromagnetic wave signal.

The dense frequency division multiplexing method based on electromagnetic wave communication according to claim 1, wherein the dividing the total bandwidth for transmitting the electromagnetic wave signal into the plurality of sub-bands further comprises: using orthogonal frequency division multiplexing to total The bandwidth is divided into a plurality of mutually orthogonal sub-bands.

A dense frequency division multiplexing device based on electromagnetic wave communication, comprising: a bandwidth dividing unit, configured to divide a total bandwidth for transmitting an electromagnetic wave signal into a plurality of sub-bands

The number of the sub-bands is not less than 128.

The dense frequency division multiplexing device based on electromagnetic wave communication according to claim 6, further comprising:

A subband dividing unit is configured to divide each subband into an effective channel for transmitting electromagnetic wave signals, and the isolating band is for isolating signal interference between adjacent subbands.

The dense frequency division multiplexing device based on electromagnetic wave communication according to claim 7, wherein in each subband, a bandwidth of the effective channel is larger than a bandwidth of the isolation band. [Claim 9] The dense frequency division multiplexing device based on electromagnetic wave communication according to claim 6, wherein the bandwidth dividing unit is further configured to:

The total bandwidth is divided into a plurality of sub-bands according to the transmission rate of the electromagnetic wave signal to be transmitted so that the bandwidth of each sub-band matches the transmission rate of the electromagnetic wave signal.

[Claim 10] The apparatus for concentrating a frequency division multiplexing based on electromagnetic wave communication according to claim 6, wherein the sub-bandwidth dividing unit is further configured to:

The total bandwidth is divided into a plurality of mutually orthogonal sub-bands by orthogonal frequency division multiplexing.