What is a channel in cellular systems

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SUMMARY

A channel in cellular systems, specifically a 5 kHz channel in a full duplex configuration, is dedicated to a single connection between two users, such as person A and person B. Each individual call requires its own channel, meaning that with 19 channels available for 120 users, there is a significant risk of call blocking due to insufficient channels. While certain modulation schemes can allow for more efficient use of bandwidth, the basic principle remains that each call needs a dedicated channel to avoid interference and ensure clear communication.

PREREQUISITES
  • Understanding of cellular communication principles
  • Familiarity with full duplex systems
  • Knowledge of modulation techniques
  • Basic concepts of channel allocation in telecommunications
NEXT STEPS
  • Research modulation schemes that allow for bandwidth sharing, such as CDMA (Code Division Multiple Access)
  • Explore the concept of channel allocation algorithms in cellular networks
  • Learn about the implications of call blocking probability in telecommunications
  • Investigate the impact of bandwidth on user capacity in cellular systems
USEFUL FOR

Telecommunications engineers, network planners, and anyone involved in cellular system design and optimization will benefit from this discussion.

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If a channel is 5Khz for a full duplex system in cellular systems does that mean person A and person B are using the whole 5Khz to communicate?

Or can the channel accommodate a lot of people?
 
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bos1234 said:
If a channel is 5Khz for a full duplex system in cellular systems does that mean person A and person B are using the whole 5Khz to communicate?

Or can the channel accommodate a lot of people?

The 5kHz slot would be for one connection. Each person-to-person connection would need its own slot.

There are modulation schemes where this is not totally true -- schemes where the comm "channels" are spread over a wider bandwidth, and interleaved in various ways.

Here is a reasonable introduction to modulation:

http://en.wikipedia.org/wiki/Modulation

.
 
thanks for reply, but I am having tough time understanding this

I read that
each call requires a channel. But in the question below I have 19 channels but 120 users. Isn't that ineffecient as there will be a lot of calls being blocked.
Would not the probability of a call being blocked be too high??

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