Abstract
Rate-1/2 180° phase-invariant convolutional coding and unquantised maximum-likelihood Viterbi decoding with differentially-encoded coherent QPSK (DE-QPSK) for bandlimited additive white Gaussian noise (AWGN) channels are considered. The simulated bit error probability performance of the trellis-coded modulation is presented for four- and eight-state convolutional codes of constraint lengths three and four, respectively.
| Original language | English |
|---|---|
| Pages (from-to) | 1141-1142 |
| Number of pages | 2 |
| Journal | Electronics Letters |
| Volume | 26 |
| Issue number | 15 |
| Publication status | Published - 1 Jan 1990 |