Howtosignalprocessing
- What is maximal ratio combining technique?
- What are the different receiver diversity combining techniques?
- How does diversity improve SNR at the receiver?
- What is equal gain combiner?
What is maximal ratio combining technique?
In telecommunications, maximum-ratio combining (MRC) is a method of diversity combining in which: the signals from each channel are added together, the gain of each channel is made proportional to the rms signal level and inversely proportional to the mean square noise level in that channel.
What are the different receiver diversity combining techniques?
There are three basic techniques for diversity combining at the receiver: selection diversity, equal-gain combining, and maximum-ratio combining. In selection diversity [10], the signal with the highest received level is switched into the receiver.
How does diversity improve SNR at the receiver?
In diversity combining at the receiver, the output signal-to-noise ratio (SNR) is often maximized by using the maximal ratio combining (MRC) provided that the channel is perfectly estimated at the receiver. However, channel estimation is rarely perfect in practice, which results in deteriorating the system performance.
What is equal gain combiner?
Equal Gain Combining: all paths cophased and summed with equal weighting. • We use space diversity as a reference for analysis; same analysis applies for any mech- anism used to obtain independent fading paths. 5. Selection Combining (SC) and its Performance • Combiner SNR γΣ is the maximum of the branch SNRs.
