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This work presents joint interference suppression and power allocationalgorithms for DS-CDMA networks with multiple hops and decode-and-forward (DF)protocols. A scheme for joint allocation of power levels across the relayssubject to group-based power constraints and the design of linear receivers forinterference suppression is proposed. A constrained minimum mean-squared error(MMSE) design for the receive filters and the power allocation vectors isdevised along with an MMSE channel estimator. In order to solve the proposedoptimization efficiently, a method to form an effective group of users and analternating optimization strategy are devised with recursive alternating leastsquares (RALS) algorithms for estimating the parameters of the receiver, thepower allocation and the channels. Simulations show that the proposedalgorithms obtain significant gains in capacity and performance over existingschemes.

Interference Suppression and Group-Based Power Adjustment via Alternating Optimization for DS-CDMA Networks with Multihop Relaying