A bandwidth-power efficient modulation scheme based on quaternary quasi-orthogonal sequences. - Youhan Kim; Kyungwhoon Cheun; Kyeongcheol Yang (IEEE Commun. Lett., 2003)

A novel frequency-hopping spread-spectrum multiple-access network using M-ary orthogonal Walsh sequence keying. - Joonyoung Cho; Youhan Kim; Kyungwhoon Cheun (IEEE Trans. Commun., 2003)

Performance of soft metrics for convolutional coded asynchronous fast FHSS-MA networks using BFSK under Rayleigh fading. - Youhan Kim; Kyungwhoon Cheun (IEEE Trans. Commun., 2003)

Modified RA codes suitable for BPSK modulated systems with non-data-aided carrier recovery. - Wangrok Oh; Kyungwhoon Cheun; Youhan Kim (ISIT, 2005)

Improving the performance of turbo codes with a simple protection scheme for error-prone bit positions. - Wangrok Oh; Youhan Kim; Kyungwhoon Cheun (IEEE Trans. Commun., 2005)

Noncoherent unitary space-time modulated DSSS systems in multipath channels. - Kyungwhoon Cheun; Jeongchang Kim; Youhan Kim; Soongyoon Choi (J. Commun. Networks, 2012)