In this paper, we propose the explicit construction of a new class of lattices based on polar codes, which are provably good for the additive white Gaussian noise (AWGN) channel. We follow the multilevel construction of Forney et al. (i.e., Construction D), where the code on each level is a capacityachieving polar code for that level. The proposed polar lattices are efficiently decodable by usi...

In this paper, we propose the explicit construction of a new class of lattices based on polar codes, which are provably good for the additive white Gaussian noise (AWGN) channel. We follow the multilevel construction of Forney et al. (i.e., Construction D), where the code on each level is a capacityachieving polar code for that level. The proposed polar lattices are efficiently decodable by usi...

We consider a class of finite-state Markov channels, in which channel behaves as a Binary Symmetric Channel (BSC) in each state. We find upper bounds on the rate of LDPC codes for reliable communication over this class of Markov channels. However, the results hold only for the construction of LDPC codes in which a code is selected randomly from a given ensemble of codes.

We present a technique for the automated detection of potential structural and data symmetries from a probabilistic specification language. This approach involves the construction of an extended static channel diagram, a graphical representation of channel-based communication and global variable accesses from a specification defined in our custom made language SPS. This graph is used to compute...

Most practical systems employ a feedback channel to convey the channel state information to the transmitter. In this work, we address the problem of designing feedback, with constraints on the feedback rate, for a multiple transmit antenna system employing transmit beamforming with a single receiver antenna. The important contribution of this work is a design criterion for construction of a fin...

The cooperative relay channel is a recent model for the exploitation of the spatial channel. One user node relays information from the source to the destination which in turn improves the error rate performance due the multiple receive copies i.e. diversity gain. The foundation for any investigation of cooperative diversity channels is based on an accurate and reliable simulation environment. T...

Intensive anthropogenic disturbances have affected the channel of the middle Yangtze River since the 1950s. This paper selects the Jianli reach as an example to examine human impact on channel change in the middle Yangtze River. 1:100,000 channel distribution maps from 1951, 1961 and 1975 and 1:25,000 navigation charts from 1981 and 1997 were employed to reconstruct channel change in the study ...

We consider error-correction over the Non-Binary Symmetric Channel (NBSC) which is a natural probabilistic extension of the Binary Symmetric Channel (BSC). We propose a new decoding algorithm for interleaved Reed-Solomon Codes that attempts to correct all “interleaved” codewords simultaneously. In particular, interleaved encoding gives rise to multi-dimensional curves and more specifically to a...

check dams, are small dams in the watershed. these dams are constructed in susceptible areas to erosion due to reduce of flow velocity and erosion, control of sediment and flood in upstream of reservoir dams. these structures are made using wood, stone and cement, and gabion. these structures change the hydrological response of the watershed by reducing flow velocity, the channel slope and stor...

We consider error-correction over the Non-Binary Symmetric Channel (NBSC) which is a natural probabilistic extension of the Binary Symmetric Channel (BSC). We propose a new decoding algorithm for interleaved Reed-Solomon Codes that attempts to correct all “interleaved” codewords simultaneously. In particular, interleaved encoding gives rise to multi-dimensional curves and more specifically to a...