Abstract
This paper presents an equalization algorithm for continuous phase modulation (CPM) over frequency-selective channels. A specific training sequence is first embedded in each data packet. By recursive least-squares (RLS) estimation, the channel information parameters can be acquired, and a fractionally spaced equalizer performs joint decoding and equalization. Simulation results show that the proposed algorithm can acquire the channel information parameters rapidly and accurately, and that the fractionally spaced equalizer can eliminate the intersymbol interference (ISI) effectively, and is not sensitive to timing inaccuracy, so this algorithm can be exploited for demodulation system in burst mode.
Article PDF
Similar content being viewed by others
References
Anderson, J.B., Aulin, T., Sunderg, C.E., 1986. Digital Phase Modulation. Plenum Press, New York.
Aulin, T., Sundberg, C.E.W., 1981. Continuous phase modulation—Part I: full response signaling. IEEE Trans. on Commun., 29(3):196–209. [doi:10.1109/TCOM.1981.1095001]
Aulin, T., Rydbeck, N., Sundberg, C.E.W., 1981. Continuous phase modulation—Part II: partial response signaling. IEEE Trans. on Commun., 29(3):210–225. [doi:10.1109/TCOM.1981.1094985]
Duel-Hallen, A., Heegard, C., 1989. Delayed decision-feedback sequence estimation. IEEE Trans. on Commun., 37(5):428–436. [doi:10.1109/26.24594]
Forney, G.D., 1973. The Viterbi algorithm. Proc. IEEE, 61(3):268–278.
Laurent, P., 1986. Exact and approximate construction of digital phase modulations by superposition of amplitude modulated pulses (AMP). IEEE Trans. on Commun., 34(2):150–160. [doi:10.1109/TCOM.1986.1096504]
Lodge, J.H., Moher, M.L., 1990. Maximum likelihood sequence estimation of CPM signals transmitted over Rayleigh flat-fading channels. IEEE Trans. on Commun., 38(6):787–794. [doi:10.1109/26.57471]
Mengali, U., Morelli, M., 1995. Decomposition of M-ary CPM signals into PAM waveforms. IEEE Trans. on Inf. Theory, 41(5):1265–1275. [doi:10.1109/18.412675]
Pancaldi, F., Vitetta, G.M., 2005. Block channel equalization in the frequency domain. IEEE Trans. on Commun., 53(3):463–471. [doi:10.1109/TCOMM.2005.843412]
Pancaldi, F., Vitetta, G.M., 2006. Equalization algorithms in the frequency domain for continuous phase modulations. IEEE Trans. on Commun., 54(4):648–658. [doi:10.1109/TCOMM.2006.873073]
Proakis, J.G., 2001. Digital Communications (4th Ed.). McGraw-Hill, New York.
Qureshi, S.U.H., 1985. Adaptive equalization. Proc. IEEE, 73(9):1349–1387.
Tan, J., Stuber, G.L., 2005. Frequency-domain equalization for continuous phase modulation. IEEE Trans. on Wirel. Commun., 4(5):2479–2490. [doi:10.1109/TWC.2005.853901]
Vitetta, G.M., Taylor, D.P., 1995a. Viterbi decoding of differentially encoded PSK signals transmitted over Rayleigh flat-fading channels. IEEE Trans. on Commun., 43(2–4):1256–1259. [doi:10.1109/26.380163]
Vitetta, G.M., Taylor, D.P., 1995b. Maximum likelihood decoding of uncoded and coded PSK signal sequences transmitted over Rayleigh flat-fading channels. IEEE Trans. on Commun., 43(11):2750–2758. [doi:10.1109/26.481226]
Vitetta, G.M., Taylor, D.P., 1996. Multisampling receiver for uncoded and coded PSK signal sequences transmitted over Rayleigh flat-fading channels. IEEE Trans. on Commun., 44(2):130–133. [doi:10.1109/26.486600]
Yiin, L., Stuber, G.L., 1997. MLSE and soft-output equalization for trellis-coded continuous phase modulation. IEEE Trans. on Commun., 45(6):651–659. [doi:10.1109/26.592602]
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Jin, Xd., Zhao, Mj., Sun, L. et al. Equalization for continuous phase modulation over frequency-selective fading channels. J. Zhejiang Univ. - Sci. A 8, 1884–1888 (2007). https://doi.org/10.1631/jzus.2007.A1884
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1631/jzus.2007.A1884
Key words
- M-ary continuous phase modulation (CPM)
- Channel-estimation
- Joint decoding and equalization
- Fractionally spaced