In digital communication systems, bit interleaving combined with Forward Error Correction (FEC) is primarily employed to mitigate:
In digital communication systems, bit interleaving combined with Forward Error Correction (FEC) is primarily employed to mitigate:
Multiple Choice Options
- A✓ Correct Option
Burst errors caused by time-selective fading
- B
Space diversity degradation
- C
Constant frequency offset
- D
Antenna polarization mismatch
Detailed Technical Solution & Explanation
In wireless channels, multipath fading typically causes signal dropouts that span multiple consecutive symbols, producing a cluster of adjacent erroneous bits known as burst errors. Standard convolutional and block codes cannot correct dense clusters of adjacent bit errors.
An interleaver shuffles the sequence of encoded bits before transmission. When the receiver de-interleaves the stream, the clustered burst errors are dispersed across the entire transmission block as widely separated, isolated single-bit errors, which can be readily corrected by the FEC decoder.