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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Manzoor, R. Rafique, A. Bajwa, K.B. |
| Copyright Year | 2008 |
| Description | Author affiliation: Adv. Eng. & Res. Organ. (AERO), Wah Cantt (Manzoor, R.; Rafique, A.; Bajwa, K.B.) |
| Abstract | Trellis Coded Modulation (TCM) combines convolutional encoding with PSK or QAM signaling to provide spectrally efficient communication with forward error correction. Although the Ungerboeckpsilas TCM (Trellis Coded Modulation) [1,2] is attractive in terms of high efficiency with low descending data rate by coding and high coding gain, it is difficult to implement. To remove this complexity, a pragmatic approach to the TCM [3], which is realized by employing the de facto convolutional code (constraint length K=7 and rate 1/2), was proposed. This paper presents hardware realization of Pragmatic Trellis Coded Modulation for 8PSK and QAM using two stages approach. In the first stage, the incoming I-channel and Q-channel samples are used to generate soft symbols. A conventional frac12 rate with K=7 Viterbi Decoder then operates on these soft symbols to estimate the coded bits. The uncoded bits are decoded in a second stage, based on the estimated coded bits and the locations of the received symbols. The design has been implemented using high-level Verilog HDL and functionally verified by mapping on to Xilinx Virtex2P FPGA. |
| Starting Page | 363 |
| Ending Page | 367 |
| File Size | 1311212 |
| Page Count | 5 |
| File Format | |
| ISBN | 9781424418756 |
| DOI | 10.1109/CSNDSP.2008.4610740 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2008-07-25 |
| Publisher Place | Austria |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Convolutional codes Phase shift keying Viterbi algorithm Convolution Modulation Hardware Decoding |
| Content Type | Text |
| Resource Type | Article |
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