Code division multiplexing cdm

Solved Step by Step With Explanation- Multiplexing Techniques Comparison

Questions

Multiplexing is a technique used in telecommunications and data communication to transmit multiple signals or data streams over a shared communication channel. It allows for the efficient utilization of bandwidth and resources. There are several types of multiplexing techniques, each with its own advantages and disadvantages. In this discussion, I will cover the four main types of multiplexing: Frequency Division Multiplexing (FDM), Time Division Multiplexing (TDM), Code Division Multiplexing (CDM), and Wavelength Division Multiplexing (WDM).

1. Frequency Division Multiplexing (FDM):

   • • Signals can have different data rates.

   • Disadvantages:

2. • Principle: TDM divides the transmission time into discrete time slots. Each input signal is assigned a specific time slot, and these slots are interleaved to create the composite signal.

   • Advantages:

   • • Inefficient for signals with varying data rates.

     • Synchronization issues can occur.
3. • • Robust against interference and jamming.

     • Multiple users can share the same frequency simultaneously.
   • • Not suitable for high data-rate applications.

4. Wavelength Division Multiplexing (WDM):

   • • Suitable for long-distance communication.

   • Disadvantages:

• Efficiency: TDM is efficient for constant bit-rate digital signals, while FDM is more suitable for analog signals and digital signals with varying data rates. CDM and WDM are designed for specific applications like multiple access and optical communication, respectively.

• Interference: CDM is highly resistant to interference and noise, making it suitable for secure communication. FDM and TDM can suffer from interference in crowded frequency or time domains.