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With the normal cyclic prefix, how many symbols are contained in 1 frame?
- a)7
- b)140
- c)12
- d)40
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
With the normal cyclic prefix, how many symbols are contained in 1 fra...
There are two different type of Cyclic Prefix. One is normal Cyclic Prefix and the other is ‘Extended Cyclic Prefix’ which is longer than the Normal Cyclic Prefix. Normal cyclic prefix contains 140 symbols in 1 frame.
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With the normal cyclic prefix, how many symbols are contained in 1 fra...
Explanation:
Cyclic Prefix:
- The cyclic prefix is a technique used in OFDM (Orthogonal Frequency Division Multiplexing) systems to eliminate inter-symbol interference.
Symbols in 1 Frame:
- In an OFDM system with a normal cyclic prefix, the number of symbols contained in 1 frame can be calculated as follows:
- Each OFDM symbol contains a cyclic prefix followed by the actual data symbols.
Calculation:
- Let's assume that the length of the cyclic prefix is 16 samples.
- If the total number of samples in 1 OFDM symbol is 128 (including the cyclic prefix), then the number of data samples in each symbol would be 128 - 16 = 112 samples.
Number of Symbols in 1 Frame:
- If we are given that 1 frame contains 10 OFDM symbols, then the total number of symbols in 1 frame would be:
10 symbols * 112 data samples per symbol = 1120 data samples.
- Therefore, in 1 frame in an OFDM system with a normal cyclic prefix, there are 1120 symbols.
Correct Answer:
- Option B: 140 symbols.
Cyclic Prefix:
- The cyclic prefix is a technique used in OFDM (Orthogonal Frequency Division Multiplexing) systems to eliminate inter-symbol interference.
Symbols in 1 Frame:
- In an OFDM system with a normal cyclic prefix, the number of symbols contained in 1 frame can be calculated as follows:
- Each OFDM symbol contains a cyclic prefix followed by the actual data symbols.
Calculation:
- Let's assume that the length of the cyclic prefix is 16 samples.
- If the total number of samples in 1 OFDM symbol is 128 (including the cyclic prefix), then the number of data samples in each symbol would be 128 - 16 = 112 samples.
Number of Symbols in 1 Frame:
- If we are given that 1 frame contains 10 OFDM symbols, then the total number of symbols in 1 frame would be:
10 symbols * 112 data samples per symbol = 1120 data samples.
- Therefore, in 1 frame in an OFDM system with a normal cyclic prefix, there are 1120 symbols.
Correct Answer:
- Option B: 140 symbols.
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