CDMA: principles of spread spectrum communication
CDMA: principles of spread spectrum communication
Spread Spectrum Systems: With Commercial Applications
Spread Spectrum Systems: With Commercial Applications
A versatile architecture for VLSI implementation of the Viterbi algorithm
ICASSP '91 Proceedings of the Acoustics, Speech, and Signal Processing, 1991. ICASSP-91., 1991 International Conference
Iterative decoding of binary block and convolutional codes
IEEE Transactions on Information Theory
Memory Power Reduction for High-Speed Implementation of Turbo Codes
Journal of VLSI Signal Processing Systems
Low-power design of turbo decoder with exploration of energy-throughput trade-off
Compilers and operating systems for low power
Design and implementation of low-energy turbo decoders
IEEE Transactions on Very Large Scale Integration (VLSI) Systems
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Channel coding is commonly incorporated to obtainsufficient reception quality in wireless mobile communicationstransceiver to counter channel degradation due to intersymbolinterference, multipath dispersion, and thermal noise induced byelectronic circuit devices. For low energy mobile wirelesscommunications, it is highly desirable to incorporate a decoder whichhas a very low power consumption while achieving a high coding gain.In this paper, a sub-optimal low-complexity multi-stage pipelinedecoder architecture for a powerful channel coding technique known as“turbo-code” is presented. The presentedarchitecture avoids complexoperations such as exponent and logarithmic computations. Theturbo-code decoding algorithm is reformulated for an efficient VLSIimplementation. Furthermore, the communication channel statisticestimation process has been completely eliminated. The architecturehas been designed and implemented with the 0.6 μm CMOS standardcell technology using Epoch computer aided design tool. Theperformance and the circuit complexity of the turbo-code decoder areevaluated and compared with the other types of well-knowndecoders. The power consumption of the low-complexity turbo-codedecoder is comparable to that of the conventional convolutional-codedecoder. However, the low-complexity turbo-code decoder has asignificant coding gain over the conventional convolutional-codedecoders and it is well suited for very low power applications.