# Sae-Young Chung

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- Publications
- Influence

Analysis of sum-product decoding of low-density parity-check codes using a Gaussian approximation

- Sae-Young Chung, T. Richardson, R. Urbanke
- Computer Science
- IEEE Trans. Inf. Theory
- 1 February 2001

Density evolution is an algorithm for computing the capacity of low-density parity-check (LDPC) codes under message-passing decoding. For memoryless binary-input continuous-output additive white… Expand

On the design of low-density parity-check codes within 0.0045 dB of the Shannon limit

- Sae-Young Chung, G. Forney, T. Richardson, R. Urbanke
- Mathematics, Computer Science
- IEEE Communications Letters
- 1 February 2001

We develop improved algorithms to construct good low-density parity-check codes that approach the Shannon limit very closely. For rate 1/2, the best code found has a threshold within 0.0045 dB of the… Expand

Sphere-bound-achieving coset codes and multilevel coset codes

- G. Forney, M. Trott, Sae-Young Chung
- Computer Science, Mathematics
- IEEE Trans. Inf. Theory
- 1 May 2000

A simple sphere bound gives the best possible tradeoff between the volume per point of an infinite array L and its error probability on an additive white Gaussian noise (AWGN) channel. It is shown… Expand

On the construction of some capacity-approaching coding schemes

- Sae-Young Chung
- Computer Science, Mathematics
- 2000

This thesis proposes two constructive methods of approaching the Shannon limit very closely. Interestingly, these two methods operate in opposite regions, one has a block length of one and the other… Expand

Noisy Network Coding

- S. H. Lim, Y. Kim, A. Gamal, Sae-Young Chung
- Computer Science, Mathematics
- IEEE Transactions on Information Theory
- 16 February 2010

A noisy network coding scheme for communicating messages between multiple sources and destinations over a general noisy network is presented. For multi-message multicast networks, the scheme… Expand

Noisy network coding

- S. H. Lim, Y. Kim, A. Gamal, Sae-Young Chung
- Computer Science
- 8 July 2010

A new coding scheme for multicasting multiple sources over a general noisy network is presented. The scheme naturally extends both network coding over noiseless networks by Ahlswede, Cai, Li, and… Expand

Capacity of the Gaussian Two-way Relay Channel to within 1/2 Bit

- Wooseok Nam, Sae-Young Chung, Y. Lee
- Mathematics, Computer Science
- ArXiv
- 14 February 2009

In this paper, a Gaussian two-way relay channel, where two source nodes exchange messages with each other through a relay, is considered. We assume that all nodes operate in full-duplex mode and… Expand

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Aligned interference neutralization and the degrees of freedom of the 2 × 2 × 2 interference channel

- Tiangao Gou, S. Jafar, Chenwei Wang, Sang-Woon Jeon, Sae-Young Chung
- Computer Science, Mathematics
- IEEE International Symposium on Information…
- 10 December 2010

We show that the 2 × 2 × 2 interference network, i.e., the multihop interference network formed by concatenation of two 2-user interference channels achieves the min-cut outer bound value of 2 DoF,… Expand

Capacity of the Gaussian Two-Way Relay Channel to Within Bit

- Wooseok Nam, Sae-Young Chung, Y. Lee
- Mathematics
- 2010

In this paper, a Gaussian two-way relay channel, where two source nodes exchange messages with each other through a relay, is considered. We assume that all nodes operate in full-duplex mode and… Expand

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- 12

Transmit Optimization for Relay-Based Cellular OFDMA Systems

- Wooseok Nam, Woohyuk Chang, Sae-Young Chung, Y. Lee
- Computer Science
- IEEE International Conference on Communications
- 24 June 2007

This paper considers a broadband cellular orthogonal frequency-division multiple-access (OFDMA) system with relay nodes operating in decode-and-forward and half-duplex mode. Two transmit resource… Expand