TY - GEN
T1 - Stochastic Soft-Input Soft-Output Detection for Intersymbol Interference Channels
AU - Haselmayr, Werner
AU - Etzlinger, Bernhard
AU - Springer, Andreas
PY - 2012/11
Y1 - 2012/11
N2 - We propose a fully-parallel low-complexity hardware architecture of a soft-input soft-output detector based on message passing on a factor graph. Conventionally, the message computation in the graph nodes consists of complex arithmetic operations on probabilities. Here, we represent probabilities by bit-serial streams and transform the arithmetic operations into simple bit-wise operations. This principle is known as stochastic computation and this is its first application to a detection algorithm. We evaluate the bit error rate (BER) performance of the stochastic detector by computer simulations of a communication system with intersymbol interference employing turbo equalization. The results show a performance loss of about 0.5dB at a BER of 10^-3 compared to the floating-point implementation of the detector.
AB - We propose a fully-parallel low-complexity hardware architecture of a soft-input soft-output detector based on message passing on a factor graph. Conventionally, the message computation in the graph nodes consists of complex arithmetic operations on probabilities. Here, we represent probabilities by bit-serial streams and transform the arithmetic operations into simple bit-wise operations. This principle is known as stochastic computation and this is its first application to a detection algorithm. We evaluate the bit error rate (BER) performance of the stochastic detector by computer simulations of a communication system with intersymbol interference employing turbo equalization. The results show a performance loss of about 0.5dB at a BER of 10^-3 compared to the floating-point implementation of the detector.
UR - https://ieeexplore.ieee.org/document/6488981
U2 - 10.1109/ACSSC.2012.6488981
DO - 10.1109/ACSSC.2012.6488981
M3 - Conference proceedings
SN - 9781467350518
T3 - Conference Record - Asilomar Conference on Signals, Systems and Computers
SP - 163
EP - 167
BT - Signals, Systems and Computers (ASILOMAR), 2012 Conference Record of the Forty Sixth Asilomar Conference on Signals, Systems, and Computers
ER -