A Dense Frequency Division Multiplexing Method and Device Based on Electromagnetic Wave Communication
A technology of frequency division multiplexing and electromagnetic wave signal, which is applied in the direction of electrical components, multiple use of transmission paths, digital transmission systems, etc., can solve the problem of low effective utilization of frequency bands, and achieve the effect of improving the communication rate
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Embodiment 1
[0034] This embodiment provides a dense frequency division multiplexing method based on electromagnetic wave communication, see figure 1 with 2 , the method includes:
[0035] S1, dividing the total bandwidth used for transmitting electromagnetic wave signals into multiple sub-bands; the number of sub-bands is not less than 128.
[0036] In this application, each subband can be used independently, so that each subband is used to transmit one signal. Multiple divided sub-bands can also be used together, so that only one channel of signal is transmitted. Multiple divided sub-bands can also be used in combination, some sub-bands transmit one channel of signal independently, and some multiple sub-bands share one channel of signal.
[0037] In the prior art, the frequency division multiplexing technique divides the total bandwidth into several subbands, but the existing frequency division multiplexing technique can only divide the total bandwidth into a very limited number of su...
Embodiment 2
[0042] This embodiment provides another dense frequency division multiplexing method based on electromagnetic wave communication, such as image 3 with 4 As shown, the method includes the following steps:
[0043] S11, dividing the total bandwidth used to transmit electromagnetic wave signals into multiple subbands; the number of subbands is not less than 128; and
[0044] S12. Divide each sub-band into an effective channel and an isolation band. The effective channel is used to transmit electromagnetic wave signals, and the isolation band is used to isolate signal interference between adjacent sub-bands.
[0045] Such as Figure 4 as shown, Figure 4It shows that a finite total bandwidth (for example, 20 MHz) is divided into many very dense subbands (subband 1, subband 2, subband 3... subbands) by using the dense frequency division multiplexing method provided by this application n), the number of subbands can be up to 128, or even 256, or even 256, or 1024, or 2048. The...
Embodiment 3
[0049] This embodiment provides another dense frequency division multiplexing method based on electromagnetic wave communication, such as Figure 5 As shown, the method includes:
[0050] S21. Divide the total bandwidth into multiple sub-bandwidths according to the 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 frequency band division structure using this frequency division multiplexing method can be shown in 2. A total bandwidth of limited width (for example, 20MHz) is divided into many very dense subbands (subband 1, subband 2, subband 3...subband n), and the number of subbands can reach 128 or even 256 , what's more, 256, can also be 1024, or 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...
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