Low Complexity System-On-Chip Architectures Of Optimal Parallel-Residue-Compensation In CDMA Systems
Cavallaro, Joseph R.
System-On-Chip; Parallel-Residue-Compensation; Interference Cancellation; CDMA
In this paper, we propose a novel multi-stage Parallel-Residue-Compensation (PRC) receiver architecture for enhanced suppression of the MAI in CDMA systems. We extract the commonality to avoid the direct Interference Cancellation and reduce the algorithm complexity from O(KÂ²N) to O(KN). In the second part, scalable VLSI architectures are implemented in a FPGA prototyping system with an efficient Precision-C System-on-Chip (SOC) design methodology. Hardware efficiency is achieved by investigating multi-level parallelism and pipelines. The design of Sum-Sub-MUX Unit (SMU) combinational logic avoids the usage of dedicated multipliers with at least 10X saving in hardware resources. The most area/timing efficient design only uses area similar to the most area constraint architecture but gives at least 4X speedup over a conventional design.