Diversity combining techniques In 4G Wireless Communications

Diversity combining techniques In Wireless Communications 

4G Communications 

A diversity system combines the independent fading paths to obtain a resultant signal that is then passed through a standard demodulator.

1) The selection combining:

In this type the receiver has many diversity branches he get the information from the branch has the largest signal-to-noise ratio only.

 

2) The maximal ratio combining: 

With maximal ratio combining, the diversity branches are weighted by their respective complex fading gains and combined. 

 

3) Equal gain combining:

Equal gain combining is similar with MRC with the only difference that the diversity branches not weighted. 

Comparison between Selection Combing and Max Ratio Combining:

the performance of the MRC is better than the performance of SC but

the amount of the improvement in the system is being clear when we increase the order of the diversity as in case of diversity order=3 it is clear that the amount of the improvement in the performance is larger than the case of the system using diversity order=2. 

 

Spatial multiplexing: 

In the diversity we were sending the same data from the antennas 

 

Spatial multiplexing (increase the data rate but we will not combating the fading). 

The diversity (combat the fading without increasing the data rate).

-------------------------------------------------------------------------

Diversity combining techniques In 4G wireless Communication channel,wireless Communications channel,
4G Communications,Diversity combining techniques In 4G wireless Communications channel
Diversity combining techniques In 4G wireless Communication channel,wireless Communication channel,
Diversity combining techniques In 4G wireless Communications channel,wireless Communications channel,
Diversity combining techniques In 4G wireless Communication channel in 4G communication,wireless Communication channel in 4G communication ,
Diversity combining techniques In 4G wireless Communications channel in 4G communications,wireless Communications channel in 4G communications,
Diversity combining techniques In 4G 4G wireless Communication channel,4G wireless Communication channel,