Zobrazeno 1 - 10
of 39
pro vyhledávání: '"Wiegart, Thomas"'
Autor:
Plabst, Daniel, Prinz, Tobias, Diedolo, Francesca, Wiegart, Thomas, Böcherer, Georg, Hanik, Norbert, Kramer, Gerhard
Neural networks (NNs) inspired by the forward-backward algorithm (FBA) are used as equalizers for bandlimited channels with a memoryless nonlinearity. The NN-equalizers are combined with successive interference cancellation (SIC) to approach the info
Externí odkaz:
http://arxiv.org/abs/2408.15767
Bipolar modulation increases the achievable information rate of communication links with direct-detection receivers. This paper optimizes bipolar transmission with a modulator bias offset for short-reach fiber links. A neural network equalizer with s
Externí odkaz:
http://arxiv.org/abs/2407.05192
Autor:
Plabst, Daniel, Prinz, Tobias, Diedolo, Francesca, Wiegart, Thomas, Böcherer, Georg, Hanik, Norbert, Kramer, Gerhard
Reliable communication over bandlimited and non-linear channels usually requires equalization to simplify receiver processing. Equalizers that perform joint detection and decoding (JDD) achieve the highest information rates but are often too complex
Externí odkaz:
http://arxiv.org/abs/2401.09217
An algorithm is proposed to encode low-density parity-check (LDPC) codes into codewords with a non-uniform distribution. This enables power-efficient signalling for asymmetric channels. We show gains of 0.9 dB for additive white Gaussian noise (AWGN)
Externí odkaz:
http://arxiv.org/abs/2305.13376
A modified successive cancellation list (SCL) decoder is proposed for polar-coded probabilistic shaping. The decoder exploits the deterministic encoding rule for shaping bits to rule out candidate code words that the encoder would not generate. This
Externí odkaz:
http://arxiv.org/abs/2305.07962
Autor:
Prinz, Tobias, Plabst, Daniel, Wiegart, Thomas, Calabrò, Stefano, Hanik, Norbert, Kramer, Gerhard
The maximum information rates for bandlimited channels with direct detection are achieved with joint detection and decoding (JDD), but JDD is often too complex to implement. Two receiver structures are studied to reduce complexity: separate detection
Externí odkaz:
http://arxiv.org/abs/2212.07761
Autor:
Prinz, Tobias, Wiegart, Thomas, Plabst, Daniel, Rahman, Talha, Hossain, Md Sabbir-Bin, Stojanović, Nebojša, Calabrò, Stefano, Hanik, Norbert, Kramer, Gerhard
PAM-6 transmission is considered for short-reach fiber-optic links with intensity modulation and direct detection. Experiments show that probabilistically-shaped PAM-6 and a framed-cross QAM-32 constellation outperform conventional cross QAM-32 under
Externí odkaz:
http://arxiv.org/abs/2205.05460
Autor:
Wiegart, Thomas, Plabst, Daniel, Prinz, Tobias, Rahman, Talha, Schädler, Maximilian, Stojanović, Nebojša, Calabrò, Stefano, Hanik, Norbert, Kramer, Gerhard
Achievable information rates of bipolar 4- and 8-ary constellations are experimentally compared to those of intensity modulation (IM) when using an oversampled direct detection receiver. The bipolar constellations gain up to 1.8 dB over their IM coun
Externí odkaz:
http://arxiv.org/abs/2205.05453
A multilevel coded modulation scheme is studied that uses solely binary polar codes and Honda-Yamamoto probabilistic shaping. The scheme is shown to achieve the capacity of discrete memoryless channels with input alphabets of cardinality a power of t
Externí odkaz:
http://arxiv.org/abs/2202.04010
Autor:
Plabst, Daniel, Prinz, Tobias, Wiegart, Thomas, Rahman, Talha, Stojanović, Nebojša, Calabrò, Stefano, Hanik, Norbert, Kramer, Gerhard
Spectrally efficient communication is studied for short-reach fiber-optic links with chromatic dispersion (CD) and receivers that employ direction-detection and oversampling. Achievable rates and symbol error probabilities are computed by using auxil
Externí odkaz:
http://arxiv.org/abs/2111.07865