Abstract:

The pilot channel data of cdma2000 1x EV-DO forward link is delivered in burst mode.The data slots are idle and the tracking loop is disturbed without any users,therefore in the next adjacent data slot,the phase of PN code and frequency offset change,what's more,the short burst length of pilot data deserves more precise channel estimation.Based on the summary of every kind of channel estimation algorithms,the advantages and disadvantages are analyzed,and the suitable environment is given,and the algorithms in common use are simulated,and the compared results are given,hence this paper provides a reference for the hardware realization of channel estimation.

Key words: EV-DO, pilot slot, channel estimation, mean algorithm, linear interpolation, least square interpolation