A polar-coded transmission (PCT) scheme with joint channel estimation and decoding is proposed for channels unknown state information (CSI). The CSI estimated via successive cancellation (SC) the constraints imposed by frozen bits. SC list an outer code improves performance, including resolving a phase ambiguity when using quadrature phase-shift keying (QPSK) Gray labeling. Simulations 5G polar...

A model of an optical fibre communication line operating at 80 Gb/s with QPSK modulation format is studied numerically. The error statistics and patterning effects are analyzed and nonlinear transmission impairments of the optical signal are quantified.

We present a low-complexity joint demapper-decoder scheme for coherent optical receivers with DQPSK modulation. The new technique reduces to 0.7dB the gap between QPSK and DQPSK in 100Gb/s coherent optical systems.

We designed at the register-transfer-level the DSP circuits for a 21.8 Gb/s QPSK-OFDM transceiver, and carried out synthesis and simulations assessing performance, power consumption and chip area, to determine their suitability for low-cost optical interconnects.

In this paper, we examine the performance of several modulation formats in more than four dimensions for coherent optical communications systems. We compare two high-dimensional modulation design methodologies based on spherical cutting of lattices and block coding of a 'base constellation' of binary phase shift keying (BPSK) on each dimension. The performances of modulation formats generated w...

In this paper, we propose the space-time turbo codes designed over integer ring for BPSK and QPSK modulation. The proposed spacetime turbo codes addeve the full spatial diversity and can be decoded using the iterative binary soft-input sofl-output (SISO) algorithm. The BPSK/QPSK binary rank criterion is used to find the interleavers which guarantee the full spatial diversity. It is shown that t...

The emerging interest in the field of digital watermarking is due to the increase in concern over copyright protection of digital information and prevention of unauthorized access, duplication and manipulation of digital data. In this paper, an entropy based blind video watermarking scheme is proposed using combined DCT-DWT transform. Two level DWT is performed on the extracted video frames, wh...

In this paper, we propose a low-complexity and efficient carrier recovery algorithm for single carrier transmission systems that is capable of tracking frequency offset (FO) variations. Working as a FO tracking estimator, the algorithm demonstrates good accuracy in simulation and a FO drift of up to 200 MHz/μs can be compensated with minimal degradation in a QPSK system. In 112 Gb/s dual polari...