Suo Qi Xinyuan property

The theoretical basis of information theory, edited by Jia Shilou, our 08052 major, Zou Binjiao, Zhang Junping's husband, has a very unique style and is unique in his senior year. He knew that he was busy looking for a job in the postgraduate entrance examination and had to call the roll. After class, he only said one thing about the exam.

Bottom line: I took everything I took. Don't even say when to answer the question. After listening to this, I suddenly felt trembling all over involuntarily. Ha ha ha, just kidding! Regarding this book, there is no relevant topic and no answer. This book should have been simple, but it is very old.

The teacher didn't talk about the test questions and content, which suddenly increased the difficulty of the course. Moreover, the reputation of teachers has already spread far, which is beyond our control. We can only obey him and take the exam.

When I come back from the exam, for the benefit of my classmates in the future, I will publish the contents of the exam by memory, widely known, and study hard in the future! We also found a phenomenon that everyone is afraid of trouble, and even the students of Harbin Institute of Technology are willing to help each other and hide when they get a little information.

Hiding, afraid of being stolen, just sighing that the world is no longer, everyone should work hard. I can sow some seeds of fraternity and classmates in some people's hearts with a certain sentence or something. I am satisfied and indifferent.

The roll of dice is 80 points,

The first question, four short answers:

Firstly, the discrete source and continuous source are defined and compared.

Second, the definition of earnings, how to describe earnings from discrete sources and continuous sources.

Thirdly, the relationship between minimum code distance and error detection and correction ability.

Similarities and differences between Hamming code and convolutional code

The second question, fill in the blanks

1, basic requirements of communication system, two spaces.

2. Binary source, transmitting 1000 per second, what is the entropy rate?

3. According to the coding purpose, what is one error correcting code and the other?

4. How about equal weight code, that is, the number of 1 in the symbol?

Third, the source sends out six signals, tells their respective probabilities, and then calculates the entropy and relative entropy of the source.

The fourth question, bit error rate Pe, is about the (7,4) bit error rate and coding efficiency of Hamming code.

Question 5, Tell Hamming Code Supervision Matrix, (9, 5)

1, explain the position of supervision elements in coding, and 2. Try to explain the relationship between supervision elements and information elements.

The sixth question, cyclic code, gives you the generating polynomial of the received code value (7,3), finds the adjoint formula, judges the error and corrects it.

Question 7. Name the bandwidth 3K and the signal-to-noise ratio 20DB.

1, find the maximum signal transmission rate of 2. If the signal-to-noise ratio is 5DB, find the bandwidth.

Question 8. Tell the probability of X 1-X7.

1, huffman encoding, compare the efficiency before and after encoding.

2. Is huffman encoding unique? Why?

The ninth question, hahaha, is to tell convolutional codes that the supervision matrix is in the form of formula, and the specific values are not written, then please write the generating matrix.

Oh, by the way, students, we can't let the teacher's plot succeed! ! ! ! Can the merits of learning after benefiting be faked? !