In this paper, code tracking loop was designed and the timing tracking performance of 1st order and 2nd order Delay-Locked Loop(DLL) for S-CDMA cable modem was evaluated in impulse, AWGN, and frequency offset channel environment. The designed 1st orde...
In this paper, code tracking loop was designed and the timing tracking performance of 1st order and 2nd order Delay-Locked Loop(DLL) for S-CDMA cable modem was evaluated in impulse, AWGN, and frequency offset channel environment. The designed 1st order DLL showed insufficient tracking performance in severe impulse noise or large frequency offset. On the other hand, the designed 2nd order DLL of loop gain G1=0.8, G2=0.01 showed good tracking performance with noticeable reduction of jitter.