Results 141 to 150 of about 1,515 (190)

Scrambling-Based Shaping for Turbo Coded Modulation

IEEE Transactions on Communications, 2010
We propose a multiple-candidate shaping technique for turbo coded modulation systems. Shaping gains are obtained by encoding each message into multiple turbo coded modulation sequences, called candidates, and then selecting the candidate with the lowest energy for transmission. Multiple candidates are generated by adding various scrambling sequences to
Mao-Chao Lin, Yung-Chih Tsai
exaly   +2 more sources

On the design of bit-interleaved turbo-coded modulation

Proceedings 2001 IEEE Information Theory Workshop (Cat. No.01EX494), 2002
Bit-interleaved turbo-coded modulations (BITCM) have been shown to achieve bit error rate performance very close to the capacity limit over both additive white Gaussian noise (AWGN) channels and Rayleigh fading channels. So far, most studies have been done on BITCM systems designed using rectangular QAM signal sets.
Stéphane Y. Le Goff, Faisal Obaid Al-Ayyan   +1 more
openaire   +3 more sources

Turbo coding applied to pragmatic trellis-coded modulation

IEEE Communications Letters, 2000
This letter reports the application of the powerful turbo coding technique combined with the bandwidth efficient method known as trellis-coded modulation (TCM). Implemented as a simple modification of pragmatic TCM, our turbo-coded pragmatic TCM system achieved coding gains of 1-2 dB in simulations relative to pragmatic TCM.
Bruce E. Wahlen, Calvin Y. Mai
openaire   +1 more source

Combined turbo equalisation and block turbo coded modulation

IEE Proceedings - Communications, 2003
The combination of equalisation and turbo decoded M-QAM is studied. In a system of block turbo coding based on iterative decoding of a product code, equalisation is incorporated in the decoding iteration loop. Most research in this area has considered the trellis equaliser. When using a high throughput modulation trellis equalisation is impossible. The
M. Noorbakhsh, K. Mohamed-Pour
openaire   +1 more source

Non-Binary Turbo Coded Spatial Modulation

2013 IEEE 78th Vehicular Technology Conference (VTC Fall), 2013
Non-binary symbol transmission such as Ternary Phase Shift Keying (TPSK) and Hexagonal Quadrature Amplitude Modulation (HQAM) can achieve the superior performance to the PSK or square QAM in the band-limited and peak-to-average power ratio (PAPR) limited channel due to its excellent natures of PAPR, spurious characteristic, and minimum Euclidean ...
Shigeaki Hashimoto, Koji Ishii, Shigeaki Ogose   +2 more
openaire   +1 more source

Space-frequency-time turbo coded modulation

IEEE Communications Letters, 2001
A new bandwidth and power efficient signaling scheme is proposed that achieves high data rates over wideband radio channels exploiting the bandwidth efficient OFDM modulation, multiple transmit and receive antennas and large frequency selectivity offered in typical low mobility indoor environments. Owing to its maximum transmit diversity gain and large
Djordje Tujkovic, Markku J. Juntti, Matti Latva-aho   +2 more
openaire   +1 more source

Turbo Trellis-Coded Differential Chaotic Modulation

IEEE Transactions on Circuits and Systems II: Express Briefs, 2018
In this brief, a novel turbo trellis-coded differential chaotic modulation (TTC-DCM) system is proposed, where parallel concatenated trellis codes are combined with the ${M}$ -ary differential chaotic shift keying ( ${M}$ -ary DCSK) scheme.
Chenglong Zhou, Wei Hu 0009, Lin Wang 0003, Guanrong Chen   +3 more
openaire   +1 more source

A nonpragmatic approach to turbo trellis coded modulations

2002 IEEE International Conference on Communications. Conference Proceedings. ICC 2002 (Cat. No.02CH37333), 2003
A novel approach to combine turbo coding and high level modulation is introduced. Systematic trellis coded M-ary modulations are used as constituent codes. This scheme is a direct generalization to M-ary modulations of binary turbo codes. As a result, the whole iterative process is performed at M-ary symbol level.
Antoine Chouly, Olivier Pothier
openaire   +1 more source

Turbo trellis-coded spatial modulation

2012 IEEE Global Communications Conference (GLOBECOM), 2012
In this paper, a turbo trellis-coded spatial modulation (TTCSM) transmission scheme is proposed. In trellis-coded spatial modulation (TCSM) scheme, the information bits used to select the transmit antenna index are encoded. In order to increase the performances of the TCSM scheme, a parallel concatenated encoding scheme can be used. Therefore, the TCSM
openaire   +1 more source

Evaluating the performance of turbo codes and turbo-coded modulation in a DS-CDMA environment

IEEE Journal on Selected Areas in Communications, 1999
Turbo codes have received great attention due to their outstanding performance. Unfortunately, a high performance is associated with large transmission delays, prohibiting an application for speech transmission. Hence, the aim of this paper is the comparison of turbo codes employing short interleavers with convolutional codes in terms of bit error rate
openaire   +1 more source