Turbo Coded OFDM System For Video Terrestrial Broadcasting
White Papers This paper analyzes the performances of a concatenated FEC scheme based on Turbo Coded and Reed-Solomon OFDM system for terrestrial broadcasting. The performances is evaluated in terms of bit error rate probability for different constituent codes...
[October 21, 2004, 3:00]
Turbo Demodulation Of Zero-Padded OFDM Transmissions
White Papers This paper has extended the turbo-demodulation procedure to ZP-OFDM by accounting for the noise color introduced by the linear equalization. Simulations have shown that iterative demodulation increases the performance gap between ZP and CP-OFDM.
[October 28, 2004, 3:00]
Turbo-Coded OFDM Transmission Over A Nonlinear Channel
White Papers In this paper, deliberate level clipping and Turbo-coding are combined to achieve an Orthogonal Frequency Division Multiplexing (OFDM) transmission system with a low Peak-to-Average power Ratio (PAR) and a good performance.
[March 24, 2005, 2:00]
A High Throughput Turbo Decoder For An OFDM-Based WLAN Demonstrator
White Papers The considerable performance gain of turbo codes compared to other conventional coding schemes makes it to a primary candidate for OFDM-based wireless LANs. This paper shows the implementation of a turbo decoder for a flexible high bit rate modem...
[October 21, 2004, 3:00]
Layered Turbo Space-Time Coded MIMO-OFDM Systems For Time Varying Channels
White Papers The transmitter employs a layered turbo space-time code. The iterative scheme proposed for the receiver integrates in one scheme turbo decoding, co-antenna interference suppression and channel estimation.
[March 30, 2005, 3:00]
LDPC And Turbo Coding Assisted Space-Time Block Coded OFDM
White Papers In this contribution both Low-Density Parity-Check (LDPC) coding and turbo coding assisted G2 space-time block coded OFDM is investigated. Space-time block coded OFDM is capable of achieving substantial diversity gains, while supporting high bit...
[November 2, 2004, 2:00]
Selective-Mapping Type Peak Power Reduction Techniques For Turbo Coded OFDM
White Papers For the first, the variation of the interleaver of the turbo encoder is replaced by the variation of the bit permutation of the turbo codeword. For the second, the variation of the interleaver of the turbo encoder is replaced by the variation of a...
[October 8, 2008, 1:21]
Turbo Coding Performance In OFDM Packet Transmission
White Papers In transmission of the packets using OFDM (Orthogonal Frequency Division Multiplexing) system recommended by IEEE.802.11 there is a constraint on the interleaving depth due to the maximum allowable packet size and processing delay requirement.
[October 26, 2004, 3:00]
Adaptive Modulation Techniques For Duplex OFDM Transmission
White Papers The design tradeoffs of turbo-coded burst-by-burst adaptive Orthogonal Frequency Division Multiplex (OFDM) wideband transceivers are analyzed. Upon invoking turbo coding and adjusting the modem mode switching regime near-error-free performance can...
[April 18, 2007, 1:00]
Method For Using Concatenated Convolutional Turbo Codes In IEEE 802.16a
White Papers Since its discovery in 1993, a lot of research has been done in the application of turbo codes in deep space communications, mobile satellite/cellular communications, microwave links, paging, in OFDM and CDMA architectures.
[October 22, 2003, 6:09]
Generic MMSE Decision Directed Channel Estimation For OFDM And MC-CDMA
White Papers Furthermore, the paper shows that the turbo-coded MC-CDMA system using the proposed MMSE DDCE method outperforms the corresponding OFDM-based system. This paper proposes a reduced-complexity MMSE SS-CIR estimator, which is suitable for employment...
[February 8, 2006, 0:01]
Comparison Of Vector Detection Algorithms For MIMO-OFDM
White Papers Moreover, iterative equalization techniques based on soft interference cancellation connected with decoding via the well-known turbo principle can approach the matched filter bound for the 4 × 4 MIMO channels used in the simulation.
[April 11, 2007, 1:01]
Subcarrier Exclusion Techniques For Coded OFDM Systems
White Papers In OFDM based wireless LANs an efficient coding scheme, e.g.turbo coding, can improve the performance considerably. However, the bit error rate is mainly affected by strongly attenuated subcarriers. This paper proposes two algorithms to adapt the...
[October 21, 2004, 0:00]
