Performance Analysis of a Variable Data Rate TCM Waveform Transmitted Over a Channel with AWGN and Pulse-Noise Interference
NAVAL POSTGRADUATE SCHOOL MONTEREY CA
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Trellis-coded modulation TCM is a technique where forward error correction coding and modulation are treated in a single operation without increasing the channel bandwidth. In this thesis the performance of a variable data rate TCM waveform transmitted over a channel is investigated. In general, TCM systems with rate 12 and rate 23 convolutional codes and Quandraface-shift keying QPSK and 8-phase-shift keying PSK modulation, respectively, are considered for two cases. In the first case, the number of memory elements K remains constant as the code rate increases. In the second case, the number of memory elements increases linearly with code rate, so that the total number of memory elements for 8-PSK, r23 TCM is given by 1 2 2 K K , where 1 2 K is the number of memory elements for the QPSK, r12 convolutionally encoded TCM. The effects of pulse-noise interference PNI in addition to additive white Gaussian noise AWGN are considered. It was found that TCM systems have significant resistance to PNI when K is large enough.
- Statistics and Probability
- Computer Programming and Software