| Summary: | 碩士 === 國立清華大學 === 電機工程學系所 === 105 === In this thesis, we derived the rank design criterion of a space-time code scheme for linear modulation over frequency-selective fast fading channels with oversampling technique. With an optimal convolutional temporal encoder and an optimal spatial encoder achieving the full transmit spatial diversity, the overall diversity gain is at least Lr(L*ECL*L) if L<=l and Lr(Lt*ECL*l+L-l) if L >l, where Lr is the number of receive antennas, Lt the number of transmit antennas, ECL the effective code length of the convolutional encoder, l the oversampling factor and L the number of taps in the equivalent tapped-delay-line channel model.
We have devised an finite-state machine for a Viterbi decoder which implements the maximum likelihood sequential detection of the received signal.Simulation results have confirmed that this coding scheme is very effective.
|
|---|
