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The flooding belief propagation (FO-BP) and the soft-cancelation (SCAN) algorithms are the two most popular soft-output BP algorithms for the decoding of capacity-achieving polar codes. The FO-BP algorithm has high throughput at the cost of performance degradation in high signal-to-noise ratio (SNR) region or with large block length. The SCAN algorithm has much better decoding performance while suffering...
The belief propagation (BP) decoding algorithm not only is an alternative to the successive cancelation (SC) decoders of polar codes, but also provides soft outputs that are necessary for joint detection and decoding. The BP decoders with the flooding schedule achieve high throughput with excessive hardware cost especially when the block length is large. The soft-cancelation (SCAN) decoders for polar...
In this paper, a shuffled schedule of the Min-Max decoding algorithm is proposed for nonbinary LDPC codes. To reduce the latency and memory requirement, a modified shuffled schedule with much simpler check node processing is also proposed, based on a new shuffle sort algorithm. Numerical simulations for three LDPC codes over GF(32) with different lengths and rates show: (1) both the shuffled and modified...
There is a changing trend of attenuation exponential summation on a huge volume of electromagnetic response data in the research of time-domain airborne electromagnetic exploration. According to this changing trait, in this paper, matrix pencil method is used to extract characteristic parameters like pole from the electromagnetic response data, as well as to complete descending rank and reconstruction...
Magnetic Resonance Sounding (MRS) is an effective and direct way to detect the underground water. The MRS-FID signal is an extremely weak signal with nV-level and it is often interfered by the various noises. Narrow-band filtering is an effective way to suppress noise and improve the SNR (signal to noise ratio). However, the bandwidth of narrow-band filtering is usually fixed, and the actual bandwidth...
The artifacts of ECG signals include baseline wander (BW), muscle (EMG) artifact, electrode motion artifact and power line interference. In order to get the optimal and robust de-noising algorithm among the generally used de-noising methods based on stationary wavelet transform (SWT), we adjust the signal-to-noise ratio (SNR) of the noisy signal from 1 db to 10 db, and evaluate the results by means...
Combination control technology (CCT) was used widely in seismic prospecting. When ambient noise is strong enough, high-quality seismic data is hardly to be acquired by CCT. To improve signal-to-noise ratio (SNR), phase control technology (PCT) was developed. As different elements of distributed vibrator array system (DVAS) located at different positions, there were wave-differences between each element...
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