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- Changkyu Seol, Kyungwhoon Cheun
- IEEE Transactions on Signal Processing
- 2008

The need for real-time computation of the Euclidean norm of a vector arises frequently in many signal processing applications such as vector median filtering, vector quantization and multiple-input multiple-output wireless communication systems. In this correspondence, we examine the properties of a linear combination of the 1-norm and the infinity norm as… (More)

- Changkyu Seol, Kyungwhoon Cheun
- IEEE Trans. Communications
- 2009

The probability density function (pdf) of the intercell interference for downlink cellular orthogonal frequency division multiple access networks under log-normal shadowing and multipath Rayleigh fading is derived. The derived pdf is observed to highly deviate from the Gaussian distribution, especially at moderate to small network loads. Based on the… (More)

- Beomkyu Shin, Changkyu Seol, Jung-Soo Chung, Jun Jin Kong
- ISCAS
- 2012

- Changkyu Seol, Kyungwhoon Cheun, Sungnam Hong
- IEEE Communications Letters
- 2010

In this letter, an approximation to the performance of downlink cellular orthogonal frequency division multiple access networks under log-normal shadowing and Ricean fading is evaluated. The interference statistic is shown to significantly deviate from the Gaussian distribution as shown in previous results under Rayleigh fading.

- Sungnam Hong, Changkyu Seol, Kyungwhoon Cheun
- IEEE Trans. Communications
- 2011

In this paper, we analyze the performance of soft decision decoded, synchronous, fast frequency-hopping spreadspectrum multiple-access networks using M -ary frequency shift keying in Rayleigh fading channels under the assumption that the number of frequency hopping slots is sufficiently large. The joint probability density function (pdf) of the absolute… (More)

- Qinghua Jia, Yongsang Kim, Changkyu Seol, Kyungwhoon Cheun
- IEEE Trans. Communications
- 2009

The need for real-time computation of the Euclidean norm of a vector frequently arises in many signal processing applications such as vector median filtering, vector quantization and multiple-input multiple-output communication systems. In this letter, we propose an accurate but computationally efficient approximation to the Euclidean norm of real-valued… (More)

- Changkyu Seol, Kyungwhoon Cheun
- VTC Fall
- 2006

An efficient synchronization scheme based on a repetitive preamble structure for orthogonal frequency division multiplexing systems was proposed by Schmidl and Cox. However, standard autocorrelation based estimation algorithms result in a plateau in the timing metric due to the cyclic prefix (CP), resulting in a region of uncertainty. Several modifications,… (More)

- Jaeyong Son, Changkyu Seol, Kyungwhoon Cheun, Kyeongcheol Yang
- IET Communications
- 2016

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