Analysis of the adaptive modulation and coding algorithm with the multicode transmission

Abstract

Adaptive modulation and coding (AMC) has gained a lot of attention in the research targeting for the standardization of the high speed downlink packet access (HSDPA). The idea is to adapt the transmission to the fast changing channel conditions by the use of different modulation and coding schemes (MCS). In this paper, an algorithm is presented for the AMC technique in the HSDPA concept with multicode transmission, and the mathematical analysis of this algorithm is given. Furthermore, a scheduling algorithm is introduced in which the terminal in a queue with the best expected carrier-to-interference ratio (C/I) is selected for the transmission interval. Such maximum C/I scheduling with the AMC and multicode transmission is anticipated to increase the throughput. In this paper, the numerical results of the analysis are compared to the respective results obtained by the simulations.