Canonical signed digit (CSD) encoding is applied to the COordinate Rotation DIgital Computer (CORDIC) algorithm. The closedform expressions of angle quantization error are obtained and verified with the simulation results, showing that the CSD-based CORDIC algorithm improves the accuracy significantly if the rotation angle is decomposed appropriately. The VLSI implementation results show that the proposed CSD-based CORDIC algorithm remarkably reduces the execution time of the conventional CORDIC algorithm.

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Assuming two non-contiguous carriers, the impact of the power amplifier (PA) configuration is investigated. The mathematical derivations show that the minimum link performance (uplink data rate) occurs when the receive power allocation between carriers amounts to either 3 dB or −3 dB, depending on the bandwidth and path loss allocation. Moreover, it is shown that the link performance can be significantly improved by configuring the PA farther away from the worst-case operating points. The analysis matches well with the experimental results based on the PA measurement campaign.