Patent ID: 6625197
Filing Date: 2003-09-23
Classification: H04B

Abstract:
A spread spectrum receiver for receiving multiple spread spectrum signals each traveling upon a different propagation path and each having a resultant arrival time difference with respect to one another, said spread spectrum receiver comprising:first demodulator means for demodulating a first spread spectrum signal of said multiple spread spectrum signals in accordance with a first arrival time; and second demodulator means for demodulating a second spread spectrum signal of said multiple spread spectrum signals in accordance with a fixed time interval difference with respect to said first arrival time, wherein said first demodulator comprises: first pseudonoise descrambling means for descrambling said first spread spectrum signal in accordance with a pseudonoise sequence to provide a first pseudonoise descrambled signal; first phase adjustment means for filtering a first pilot signal from said first pseudonoise descrambled signal to provide a first filtered pilot signal and multiplying said first pseudonoise descrambled signal with said first filtered pilot signal to provide a first phase adjusted signal; first dechannelization means for multiplying said first phase adjusted signal by an orthogonal channel sequence; wherein said spread spectrum receiver further comprises pseudonoise generator for generating said pseudonoise sequence and wherein said second demodulator means comprises: delay means for receiving said pseudonoise sequence and for delaying said pseudonoise sequence by said fixed time interval difference to provide a delayed pseudonoise sequence; second pseudonoise descrambling means for descrambling said second spread spectrum signal in accordance with said delayed pseudonoise sequence to provide a second pseudonoise descrambled signal; second phase adjustment means for filtering a second pilot signal to provide a second filtered pilot signal from said second pseudonoise descrambled signal and multiplying said second pseudonoise descrambled signal with said second filtered pilot signal to provide a second phase adjusted signal; and second dechannelization means for multiplying said second phase adjusted signal by a delayed orthogonal channel sequence.