Summary

• For binary antipodal signals, the best receiver computes the weighted average of the received signal over each bit period.
• The required weighting is equal to the pulse used to transmit a ``1'' bit.
• This demodulator or receiver produces (on average) the smallest number of wrong decisions or bit errors.
• The receiver computing weighted averages is extremely important. It is often called the matched filter receiver.
• If the signal set is not binary or antipodal, the receiver below must be m odified.

  

Figure 2.36: Block Diagram of Matched Filter Receiver for Binary Antipodal Signa ls.