Simulation of Turbo receiver for vector OFDM
| Author(s) | Qu, Zhe | |
| Date Accessioned | 2018-01-25T13:31:50Z | |
| Date Available | 2018-01-25T13:31:50Z | |
| Publication Date | 2017 | |
| SWORD Update | 2017-09-06T19:35:16Z | |
| Abstract | Vector orthogonal frequency division multiplexing (V-OFDM) for single transmit antenna systems is a general block based transmission scheme, where OFDM and single carrier frequency domain equalizer (SC-FDE) are two special and extremal cases. ☐ In this thesis, algorithms of detecting and Turbo decoding for V-OFDM systems are simulated and discussed. We use quadrature amplitude modulation (QAM) to modulate Turbo coded V-OFDM (TC-V-OFDM) system, the output of detecting part is soft information, therefore the Turbo decoding algorithm need to be modified. By modifying the maximum a posteriori (MAP) algorithm, a single input single output (SISO) MAP Turbo decoding algorithm has been discussed in this thesis. ☐ Then, the theory of decoding turbo code is applied to the detection of signals by the joint of equalization and decoding. The recursive equalization algorithm of MAP and linear MMSE are discussed in detail. The lower-complexity MMSE equalization algorithm has eventually been chosen as the simulation algorithm because that the complexity of MAP will increase exponentially with the modulation order and the memory length of ISI channel. The characteristics of V-OFDM’s cyclic prefix reduce the complexity of MMSE equalizer further. ☐ Turbo Receiver of TC-V-OFDM system is realized in this thesis by applying the recursion, and this not only increases the diversity gains, but also decreases bit error rate (BER) of the system, therefore the performance of the system is improved greatly. ☐ Key Words: Turbo code; Turbo Receiver; V-OFDM; MMSE | en_US |
| Advisor | Xia, Xiang-Gen | |
| Degree | M.S. | |
| Department | University of Delaware, Department of Electrical and Computer Engineering | |
| Unique Identifier | 1020318736 | |
| URL | http://udspace.udel.edu/handle/19716/22613 | |
| Language | en | |
| Publisher | University of Delaware | en_US |
| URI | https://search.proquest.com/docview/1975367632?accountid=10457 | |
| Keywords | Applied sciences | en_US |
| Keywords | MMSE | en_US |
| Keywords | Turbo code | en_US |
| Keywords | Turbo receiver | en_US |
| Keywords | V-OFDM | en_US |
| Title | Simulation of Turbo receiver for vector OFDM | en_US |
| Type | Thesis | en_US |