On which factors do the channel capacity depend in the communication system?

On which factors do the channel capacity depend in the communication system?

Channel Capacity Channel capacity of the wireless underground channel depends on the soil moisture, operation frequency, and bandwidth of the antenna. Impact of different factors on the channel capacity are shown in the following.

What key factors affect channel capacity?

Key factors affecting the channel capacity are-

• Data rate- speed of data transmission measured in bits per second.
• Bandwidth – Maximum data transfer rate of a network i.e. 25 Mbps.
• Error rate – It is the ratio of total number of data units resulted in error to the total number of data units transmitted.

What is wireless channel capacity?

The basic measure of performance is the capacity of a channel: the maximum rate of communication for which arbitrarily small error probability can be achieved. The AWGN channel is then used as a building block to study the capacity of wireless fading channels.

What is channel capacity?

The channel capacity, C, is defined to be the maximum rate at which information can be transmitted through a channel. The fundamental theorem of information theory says that at any rate below channel capacity, an error control code can be designed whose probability of error is arbitrarily small.

What is bandwidth and channel capacity?

Channel capacity is a maximum information rate that a channel can transmit. It is measured in bits per second (bps). Bandwidth can be considered as a subset of channel capacity term. When bandwidth is measured, the maximum volume of information that can be accurately transferred per unit of time is taken into account.

How can channel capacity be Maximised?

As a result, MIMO technology is able to increase the capacity of a given channel while obeying Shannon-Hartley’s equation. By increasing the number of transmit and receive antennas, a 2 x 2 MIMO system effectively doubles the maximum data rate of what can be achieved in a traditional single RF channel.

What is the relationship between channel capacity and bandwidth?

Bandwidth is a fixed quantity, so it cannot be changed. Hence, the channel capacity is directly proportional to the power of the signal, as SNR = (Power of signal) / (power of noise). So for example a signal-to-noise ratio of 1000 is commonly expressed as: 10 * log10(1000) = 30 dB.

What can you do to increase the channel capacity?

This means channel capacity can be increased linearly either by increasing the channel’s bandwidth given a fixed SNR requirement or, with fixed bandwidth, by using higher-order modulations that need a very high SNR to operate.

How do I know my channel capacity?

According to channel capacity equation, C = B log(1 + S/N), C-capacity, B-bandwidth of channel, S-signal power, N-noise power, when B -> infinity (read B ‘tends to’ infinity), capacity saturates to 1.44S/N.

What is meant by a communication channel and channel capacity?

Channel capacity, in electrical engineering, computer science, and information theory, is the tight upper bound on the rate at which information can be reliably transmitted over a communication channel.

Is channel capacity and bandwidth same?

Bandwidth is defined as: a range of frequencies (or channels) within a given band, in particular that used for transmitting a signal. Channel capacity is a much-used metric for the maximum amount of traffic or signal that can move over a particular infrastructure channel (or frequency).

What is the maximum capacity of a channel?

It can be observed that capacity range is from 38 to 70 kbps when system operates at optimum frequency. It can also be observed that for a given soil moisture level, there is an optimal operational frequency at which high capacity can be achieved. Figure 5.14.

How is the channel capacity of an underground communication system calculated?

In Fig. 5.14 A, channel capacity of underground communication system operating at different frequencies is shown for different soil moisture values. The channel capacity is calculated as a function of the operation frequency according to (5.28). It can be observed that capacity range is from 38 to 70 kbps when system operates at optimum frequency.

How is channel capacity related to soil moisture?

In Fig. 5.14 B, channel capacity in sandy, and clay soils is shown as a function of change in soil moisture. In clay soil, with decrease in soil moisture from 40% to 10%, operation frequency increases from 408 to 832 MHz. Similarly, in sandy soil, with the same change in soil moisture, operation frequency changes from 394 to 779 MHz.

How is the capacity of an underground antenna determined?

In addition to the change in soil moisture, the return loss, and bandwidth of underground antenna also change with the soil moisture, and causes variations in the underground channel capacity ( Dong and Vuran, 2013a ). Bandwidth of underground antenna is determined by the return loss which is taken at 10 dB threshold value.