WCDMA的混合多速率方案

Proceedings of IEEE. IEEE Region 10 Conference. TENCON 99. 'Multimedia Technology for Asia-Pacific Information Infrastructure' (Cat. No.99CH37030) Pub Date : 1999-09-15 DOI:10.1109/TENCON.1999.818648

S. Kim, S. Shin, K. Kwak

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引用次数: 5

摘要

为了适应具有不同数据速率的信息源，考虑了不同类型的多速率通信系统。直接序列码分多址(DS/CDMA)技术在这类系统中的应用引起了人们的广泛关注。本文对WCDMA系统中的三种多速率传输方案进行了比较。同时考虑了AWGN信道和多径瑞利衰落信道。研究表明，在高数据速率下，可变扩频因子方案中的扩频因子非常小，因此由于码间干扰，性能会显著下降。因此，可变扩频因子用于低和中高数据速率，并结合多码传输用于最高数据速率。仿真结果表明，混合多速率传输方案适用于WCDMA。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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A hybrid multi-rate scheme for WCDMA

Different kinds of multi-rate communication systems are considered for accommodating information sources with different data rates. Direct-sequence code-division multiple access (DS/CDMA) techniques have attracted much attention for use in such systems. In this paper three multi-rate transmission schemes in a WCDMA system are compared. Both AWGN and multipath Rayleigh fading channels are considered. It is shown that for high data rates the spreading factor in the variable spreading factor scheme will be very small and thus the performance will be significantly degraded due to intersymbol interference. Thus variable spreading factors are used for the low and medium high data rates, and combined with multicode transmission for the highest data rates. Simulation result shows that hybrid multi-rate transmission scheme is suitable for WCDMA.

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来源期刊

Proceedings of IEEE. IEEE Region 10 Conference. TENCON 99. 'Multimedia Technology for Asia-Pacific Information Infrastructure' (Cat. No.99CH37030)

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