Question:
M-ary encoding in Digital communication is done to achieve ________.
M-ary encoding in Digital communication is done to achieve ________.
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M-ary modulation improves bandwidth efficiency by packing more bits per symbol, but it increases system complexity and requires higher SNR.
Updated On: Jun 23, 2025
- Power Optimization
- Error detection and correction
- Data encryption
- Bandwidth efficiency
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The Correct Option is D
Solution and Explanation
What is M-ary Encoding:
In digital communication, M-ary encoding refers to using more than 2 symbols (i.e., beyond binary) to represent data.
For example, in 4-ary (M=4) encoding, 2 bits can be represented per symbol.
Why M-ary improves bandwidth efficiency:
Increasing M reduces the number of symbols required to transmit a message.
Fewer symbols per second means reduced bandwidth usage.
Example: Binary needs 1 symbol per bit; 4-ary needs only 0.5 symbols per bit.
Trade-off:
Higher M means improved bandwidth efficiency.
But it requires better SNR to distinguish between more symbols.
In digital communication, M-ary encoding refers to using more than 2 symbols (i.e., beyond binary) to represent data.
For example, in 4-ary (M=4) encoding, 2 bits can be represented per symbol.
Why M-ary improves bandwidth efficiency:
Increasing M reduces the number of symbols required to transmit a message.
Fewer symbols per second means reduced bandwidth usage.
Example: Binary needs 1 symbol per bit; 4-ary needs only 0.5 symbols per bit.
Trade-off:
Higher M means improved bandwidth efficiency.
But it requires better SNR to distinguish between more symbols.
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