关键词: 移动通信, 时分双工, 高速下行分组接入, 智能天线, 调制编码方案

Abstract: Relations of signal-to-noise ratio between pilot channel and traffic channel in TDD-HSDPA/SA (time division duplex-high speed downlink packet access/smart antenna) system was analyzed when smart antenna character was taken into account. Several improved MCS (modulation coding scheme) selection schemes for TDD-HSDPA/SA system based on slot scheduling were presented. In the improved schemes, MCS selection is performed based on pilot channel condition, with additional prediction according to different antenna types, or, in combination with traffic channel condition. A dynamic system level simulator was designed to analyze performance such as system throughput and residual block error ratio for each scheme. The simulation indicates that the improved mechanisms increase system throughput considerably while maintaining desired residual block error ratio.

Key words: mobile communication, time division duplex, high speed downlink packet access, smart antenna, modulation coding scheme