5.1 Transmitter

First, increase the n frequencies on the unique entrance band (that is centered in frequency ) incoming from the inverse of , then the n new top frequencies are used to create n transformed signals with the rule suggested by communication theory and these last signals enter a blender. Then, the mixed signal is taken by a band generator and projected in Q new bands centered at the frequencies (each corresponds to a resonant frequency). Finally, each band enters this signal transmitter.

the signals are blended and then sending to a secondary mirror band generator which knows that there are n recording times and because of that it can create n bands with the higher central frequencies (these last signals could be amplitude-modulated signals) and distribute the blended signal among them. Then, every signal on each band enters a frequency dimmer (the inverse operation performed by the frequency elevators in the transmitter), so we retrieve the n original signals corresponding to the unique band . For example, in Section 3, we have that the total number of resonances is , and the two

Flow chart for a proposal device. This can emit and read the blended messages with recording times

At this point, it is important to say that the key point on the use of the proposed

Based on the equivalence of the TRT and the properties of the Green function, we can trust that any discussion about the interaction of metamaterials with electromagnetic field can be done through this function and simultaneously observe the effect of a time reversal. For this reason, we can now describe the error in terms of the Green function by the hypothesis that LHM can be put to test by forward and backward in time signals and read the results with two points of view: first, the direct effect of the loss of information because of the limited record time T or second, how the negative refraction index helps to preserve information. Now, we can review our previous results and generalize using the kernels, so we can characterize the capacity of a channel in many different circumstances. So, we have made

resonant frequencies are and .

diminish mutual interference between different signals.

beneath to the unique band .

Optimum Efficiency on Broadcasting Communications DOI: http://dx.doi.org/10.5772/intechopen.84954

Figure 2.

29

6. Error in time reversing and a related theorem

device is the build of information packs described in another place in order to

### 5.2 Receiver

The traveling signals enter the mirror band amplifier, so called because it knows that there are resonant frequencies and then can create (or separate the signal in Q resonant bands) sub-bands and amplify the signal in each band (at this moment, each band carries a piece of the original n different signals); after this,

Figure 1. Image of the solutions of Eq. (11) when the related equation is 987.93(x<sup>2</sup> -y2 –106 ) = y (10<sup>6</sup> -2x).

Optimum Efficiency on Broadcasting Communications DOI: http://dx.doi.org/10.5772/intechopen.84954

#### Figure 2.

changes. We see how in practice the time-reversal parameter T appears explicitly but also that when we cut the time duration of reversed signal, it is possible to consider them as an additive contribution to . But the form of Eq. (25) suggests a generalized measure of a blend or mix channel capacity when sharing the

Telecommunication Systems – Principles and Applications of Wireless-Optical Technologies

CT1,T2,⋯,Tn <sup>¼</sup> <sup>Θ</sup> log <sup>S</sup> <sup>þ</sup> Q nð Þ ; <sup>T</sup>1; <sup>T</sup>2; <sup>⋯</sup>; Tn

also suggests that we can design an appropriate filter that can distinguish between signals according to the recording time that is we can superpose signals with the same frequency range but with different recording times. In a previous work, we have sketched a filter, but now we give a better-defined device, so we propose (see Figure 2) as a hint to get the filter, the following steps for both the transmitter and

First, increase the n frequencies on the unique entrance band (that is centered in frequency ) incoming from the inverse of , then the n new top frequencies are used to create n transformed signals with the rule suggested by communication theory and these last signals enter a blender. Then, the mixed signal is taken by a band generator and projected in Q new bands centered at the frequencies (each corresponds to a resonant frequency).

The traveling signals enter the mirror band amplifier, so called because it knows that there are resonant frequencies and then can create (or separate the signal in Q resonant bands) sub-bands and amplify the signal in each band (at this moment, each band carries a piece of the original n different signals); after this,

> -y2 –106

) = y (10<sup>6</sup>


The fact that we are using the same band but different cutting limits

Q nð Þ ; T1; T2; ⋯; Tn 

(30)

same band W and differ only by the recording time

Finally, each band enters this signal transmitter.

Image of the solutions of Eq. (11) when the related equation is 987.93(x<sup>2</sup>

the receiver:

5.2 Receiver

Figure 1.

28

5.1 Transmitter

Flow chart for a proposal device. This can emit and read the blended messages with recording times beneath to the unique band .

the signals are blended and then sending to a secondary mirror band generator which knows that there are n recording times and because of that it can create n bands with the higher central frequencies (these last signals could be amplitude-modulated signals) and distribute the blended signal among them. Then, every signal on each band enters a frequency dimmer (the inverse operation performed by the frequency elevators in the transmitter), so we retrieve the n original signals corresponding to the unique band . For example, in Section 3, we have that the total number of resonances is , and the two resonant frequencies are and .

At this point, it is important to say that the key point on the use of the proposed device is the build of information packs described in another place in order to diminish mutual interference between different signals.
