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What is meant by diversity gain?
Diversity gain is the increase in signal-to-interference ratio due to some diversity scheme, or how much the transmission power can be reduced when a diversity scheme is introduced, without a performance loss. Diversity gain is usually expressed in decibels, and sometimes as a power ratio.
What is coding gain in wireless communication?
In coding theory and related engineering problems, coding gain is the measure in the difference between the signal-to-noise ratio (SNR) levels between the uncoded system and coded system required to reach the same bit error rate (BER) levels when used with the error correcting code (ECC).
How is diversity gain calculated?
In order to find the diversity gain, the power samples of the two branches are combined by selection combining (SC) and maximal ratio combining (MRC) [12]. With SC the branch with the highest power for each of the 3750 equal measurement situations is always selected.
What is Diversity multiplexing trade off?
The diversity–multiplexing tradeoff is essentially the tradeoff between the error probability and the data rate of a system. A common way to study this tradeoff is to compute the relia- bility function from the theory of error exponents [10].
What is diversity order?
For a system transmitting over frequency selective fading channels, the diversity order can be defined as the number of multi-paths if multi-paths have all equal energy. In order to obtain a rough value of diversity order, one may use the number of multi-paths or the reciprocal value of the multi-path energy variance.
What is multiplexing gain in MIMO?
Spatial multiplexing gain. MIMO channels offer a linear increase in capacity without additional power or bandwidth. This gain is referred as spatial multiplexing gain. The spatial multiplexing gain is realized by transmitting independent data signals from individual antennas.
What’s the difference between coding and diversity gain?
In space-time block coding, symbols are repeated over time and space in a specific pattern, which creates (potentially) both transmit and space diversity. They don’t offer an intrinsic coding gain because the information is not encoded. Trellis codes, on the other hand, allow for a coding gain because not all symbol sequences are…
What is the difference between array gain and diversity gain?
The difference between array gain and diversity gain is that array gain gives an increase in the average SNR, while diversity gain makes the probability density function of the instantaneous SNR more concentrated around its average value.
How is diversity gain expressed in signal to interference ratio?
Diversity gain. Diversity gain is the increase in signal-to-interference ratio due to some diversity scheme, or how much the transmission power can be reduced when a diversity scheme is introduced, without a performance loss. Diversity gain is usually expressed in decibels, and sometimes as a power ratio.
Which is the best definition of coding gain?
In coding theory and related engineering problems, coding gain is the measure in the difference between the signal-to-noise ratio levels between the uncoded system and coded system required to reach the same bit error rate levels when used with the error correcting code.