Howtosignalprocessing
- What is the relation between Q function and erfc?
- How is erfc calculated?
- What is the difference between probability of error and bit error rate?
- What is BER in wireless communication?
What is the relation between Q function and erfc?
and erfc Functions. The Q function is defined as. The function is used to evaluate the error probability of transmission systems that are disturbed by additive Gaussian noise. Some textbooks use a different function for that purpose, namely the complementary error function, abbreviated as erfc.
How is erfc calculated?
erfc ( x ) = 2 π ∫ x ∞ e − t 2 d t = 1 − erf ( x ) .
What is the difference between probability of error and bit error rate?
Probability is the estimate before transmission; error rate is the recorded number after transmission. Error rate is a hard upper bound for error correction algorithms. Probability of error can also apply to more than just single-bit errors.
What is BER in wireless communication?
In digital transmission, the number of bit errors is the number of received bits of a data stream over a communication channel that have been altered due to noise, interference, distortion or bit synchronization errors. The bit error rate (BER) is the number of bit errors per unit time.
