Joo-Kwang Kim

High performance MAC architecture for 3GPP modem

This paper presents the architecture and implementation of LMAC which is the core block for high speed modem such as HSPA+ and LTE. The required data rate of these modems are 28.8Mbps/11.5Mbps (HSPA Release 7modem) and 100Mbps/50Mbps (LTE modem) for downlink/ uplink, respectively. To support higher data rate, we designed the new LMAC. Architecturally, LMAC includes cipher HW and provides functions such as fast data transfer, packet generation and parsing. Especially, we designed a new function which combines data transfer with cipher and has more performance benefit. As a result, our design can be used for the platform to support HSPA+ & LTE modems. And also, we reduced the processing time and the CPU & bus utilization, therefore, SW can obtain more margin to process the protocol stack.

Development platform implementation and verification for UMTS UE MODEM

In this paper, we present the development platform (DP) of a user equipment (UE) baseband modem in compliance with 3GPP Release 99 FDD specification. The configuration of the development platform and a detailed explanation of test items are described. The functionality and performance of the UE modem and protocol stacks (layer 1 and layer 2/3) are confirmed by HW/SW co-verification using Seamless CVE and call tests using the Anritsu MD8480A base station simulator. Currently, the UMTS UE modem chip based on development platform is implemented in 0.18 /spl mu/m CMOS technology and tests on the chip are in progress.