Title :
The use of interleaving for reducing noisy reference loss in trellis-coded modulation systems
Author :
Divsalar, Dariush ; Simon, Marvin K.
Author_Institution :
Jet Propulsion Lab., California Inst. of Technol., Pasadena, CA, USA
fDate :
8/1/1990 12:00:00 AM
Abstract :
The use of interleaving/deinterleaving in trellis-coded modulation systems to reduce the SNR loss due to imperfect carrier demodulation references is demonstrated. Both the discrete carrier (phase-locked loop) and the suppressed carrier (Costas loop) cases are considered, and the differences between the two are clearly demonstrated by numerical results. The special case of convolutional codes is also treated and illustrated with an example of practical interest
Keywords :
demodulation; encoding; modulation; phase shift keying; Costas loop; QPSK; SNR loss; convolutional codes; deinterleaving; discrete carrier; imperfect carrier demodulation references; interleaving; noisy reference loss reduction; phase-locked loop; suppressed carrier; trellis-coded modulation systems; Bandwidth; Convolutional codes; Decoding; Degradation; Demodulation; Error probability; Interleaved codes; Noise reduction; Pairwise error probability; Upper bound;
Journal_Title :
Communications, IEEE Transactions on
