Barker code is an 11-bit sequence (for example, 10110111000), which has advantages in wireless transmission and can effectively reduce interference, but reduces efficiency.

Question

Options

• ATrue
• BFalse

• A
  71% (50)
• B
  29% (20)

Explanation

Option A is correct because all components of the statement are factually accurate. Barker codes do include an 11-bit sequence (used in IEEE 802.11b Wi-Fi via Direct Sequence Spread Spectrum), and their near-perfect autocorrelation properties make them highly effective at resisting interference and aiding synchronization in noisy wireless environments. However, because an 11-bit chip sequence is used to represent fewer actual data bits, the transmission requires more bandwidth than the raw data would need, which directly reduces spectral efficiency -- this is the fundamental trade-off of spread spectrum techniques.

Option B is wrong because there is no factual error in the original statement; the interference reduction and efficiency cost are both real, documented characteristics of Barker-coded DSSS.

Memory tip: Think of a Barker code as a bodyguard for your data -- it takes 11 steps to escort every bit safely through a noisy channel, which keeps the data safe but slows down the overall throughput.

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