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DSP Implementation on Combination of TCM and Adaptive Decision Feedback Equalizers

Author: LuRuiFeng
Tutor: DuShuanYi
School: Xi'an University of Electronic Science and Technology
Course: Communication and Information System
Keywords: Trellis Coded Modulation Decision Feedback Equalizers Digital Signal processor
CLC: TN911.2
Type: Master's thesis
Year: 2006
Downloads: 19
Quote: 0
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Abstract


Because of the increasing needs for high quality communication, transmission of digital information is inevitable. HF communication plays an important role in the wireless communications, due to its advantages such as long range, good flexibilities, and strong subsistence. A research of application of combination of trellis coded modulation and Decision Feedback Equalization (DFE), mainly aims at wireless high data transmission. Waveform shaping using the raised cosine filter for transmitted signal pulse is discussed and an advanced channel coding technique-trellis coded modulation on the basis of 16QAM is mainly presented. Due to the property of severe noise, time variety and multi-path transmission, HF channels are poor. TCM has been introduced to improve it’s tolerance of noise, and adaptive equalization has been used to eliminate the ISI (Inter Symbol Interference) produced by multi-path transmission. The combination of TCM and DFE increases the data rate of transmission and reduce the probability of a symbol error. The coding, viterbi decoding of TCM and adjustment of equalizer based on tentative decisions with TMS320VC33 are realized. Finally, a computer simulation of the performance of the system on AWGN channels and the algorithm of rooted square Kalman are presented.

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Communicate > Communication theory > Information Theory
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