We consider the problem of coding for discrete memoryless channels with noiseless feedback. When studying Horstein’s sequential coding scheme, Schalkwijk in 1971 found a regular behaviour of the so-called median paths for certain channel error probabilities, which led to the development of repetition strategies. We proof that Schalkwijk’s block decoding scheme exactly follows Horstein’s regular

Concatenating the state-of-the-art codes at moderate rates with repetition has emerged as a practical solution deployed in various standards for ultra-low-power devices such Internet-of-Things (IoT) networks. In this paper, we propose novel concatenation mechanism applications which need to operate very low signal-to-noise ratio (SNR) regime. proposed scheme, outer code is hybrid polar construc...

This paper shows the experimental details of the stabilization scheme that allows full control of the repetition rate and the carrier-envelope offset frequency of a 10 GHz frequency comb based on a femtosecond Ti:sapphire laser. Octave-spanning spectra are produced in nonlinear microstructured optical fiber, in spite of the reduced peak power associated with the 10 GHz repetition rate. Improved...

This paper shows the experimental details of the stabilization scheme that allows full control of the repetition rate and the carrier-envelope offset frequency of a 10 GHz frequency comb based on a femtosecond Ti:sapphire laser. Octave-spanning spectra are produced in nonlinear microstructured optical fiber, in spite of the reduced peak power associated with the 10 GHz repetition rate. Improved...

In this paper we initially provide a new geometric interpretation of additive and multiplicative spread-spectrum (SS) watermarking with repetition coding and ML decoding. The interpretation gives an intuitive rationale on why the multiplicative scheme performs better in front of additive independent attacks, and it is also used to produce a novel quantitative performance analysis. Furthermore, ...

Recently, Cooperative diversity in wireless communication systems has gained much attention. A simple two-user cooperative diversity scheme called decode-and-forward cooperation scheme has been presented by Laneman (2004). Each user has one partner to decode its information and retransmit it by employing repetition coding. This scheme can offer diversity order of two. But the bandwidth efficien...

A novel service-based soft HARQ scheme for Machine Type Communication (MTC) is proposed in this paper. Conventionally, the repetition number for each HARQ retransmission is fixed. In contrast, in our soft HARQ scheme the repetition number is selected to optimize specific objective functions corresponding to diverse service demands. Based on this, three soft HARQ strategies, namely Strategies EM...

A simple, fast and long-scan-range pump-probe scheme is experimentally demonstrated using a dual-wavelength passively mode-locked fiber laser. The pulse trains from the dual-wavelength laser have a small difference in their repetition frequencies inherently determined by the intracavity dispersion. This enables the realization of the asynchronous sampling scheme with a tens-of-nanosecond-long d...