Question
Which probability distribution is most widely used to
model channel noise in pulse code modulation?Solution
In PCM systems, the channel noise mainly comes from thermal noise, which is the result of random motion of electrons in conductors and electronic devices. By the central limit theorem, the sum of many small random effects tends to follow a Gaussian (normal) distribution. That’s why Gaussian distribution is the most accurate and widely used model for channel noise in digital communication systems.
There are 108 rupees in a box which contains coins of 1 rupee, 50 paise, and 25 paise. If the number of 50 paise coins is 3 times the number of 25 paise...
Three numbers are in the ratio 3:5:6. If the sum of their squares is 630, then the numbers are:
A sum of money is divided among P, Q, R and S in the ratio of 2:3:6:7 respectively. If the share of R's is Rs. 2850 more than the share of Q, then what ...
Marks scored by A and B in a test are in the ratio 13:5 respectively. If B had scored 5 more marks, then marks scored by A would be 30% more than that o...
Abdul allocates 90% of his income among his wife, son, and daughter in the ratio of 5:2:1, while saving the remaining amount, which totals Rs. 4,000. Fr...
A student bought 10 pencils and 8 pens at Rs 150. He sells pencil at 4%profit and pen at 7%profit. Overall, he gains Rs 9 Find the cost price of each pe...
In an office, the ratio of the number of males to number of females is 9:4. If 2 males joined the class and 8 females left the class, then the ratio of ...
Some amount was divided among A, B and C in the ratio 2:3:5. If the share of A is 30 less than share of C, then find the 1/5th of total amount (in Rs).
Ratio of monthly income to monthly expenditure of A is 10:7, respectively and monthly savings of A is Rs. 4500. Find the monthly income of A.
Find the third proportional to 11 and 33?