s.sunilpal123
2011-06-16, 09:21 PM
Hello friends.
Another question I can't answer...Pls help me decode this.
WCDMA is CDMA technology. Consider Downlink. All the users' data is sent on same carrier. Users within same cell are differentiated by their OVSF codes. Now when we talk of power control in DL, we say that a UE-one nearer to nodeB is entitled to less power from the nodeB than a UE-two which is at the cell edge.
What I fail to understand is how is this nodeB power for the UEone is being decreased...What parameter is controlled to reduce this power for the UEone? As it is CDMA, one cannot reduce the nodeB power as then all users' received power will decrease. How is this 'individual' node B power to a particular UE decreased? Is it just varying the amplitude of the input signal, or of the carrier during modulation or during channel coding or during spreading?
Another question I can't answer...Pls help me decode this.
WCDMA is CDMA technology. Consider Downlink. All the users' data is sent on same carrier. Users within same cell are differentiated by their OVSF codes. Now when we talk of power control in DL, we say that a UE-one nearer to nodeB is entitled to less power from the nodeB than a UE-two which is at the cell edge.
What I fail to understand is how is this nodeB power for the UEone is being decreased...What parameter is controlled to reduce this power for the UEone? As it is CDMA, one cannot reduce the nodeB power as then all users' received power will decrease. How is this 'individual' node B power to a particular UE decreased? Is it just varying the amplitude of the input signal, or of the carrier during modulation or during channel coding or during spreading?