Wideband CDMA packet data with hybrid ARQ

1988 IEEE 5th International Symposium on Spread Spectrum Techniques and Applications - Proceedings. Spread Technology to Africa (Cat. No.98TH8333) Pub Date : 1998-09-02 DOI:10.1109/ISSSTA.1998.726250

M. Raitola, H. Holma

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引用次数: 7

Abstract

The performance of wideband CDMA packet data with soft combining of packets is analysed. First, the main parameters of W-CDMA (wideband CDMA) are presented. W-CDMA refers to the air interface that was decided by the ETSI to be standardised for the UMTS air interface for paired bands. Secondly, the W-CDMA packet transmission scheme with soft combining of packets is introduced. Soft combining indicates the combining of the soft values of the unsuccessful transmission with the retransmission before feeding them to the channel decoder. The performance of soft combining is compared to the performance of noncombining packet solution. The results show that soft combining can increase the capacity and extend the cell range up to 2 dB against Gaussian noise if no fast power control is used. With fast power control the gain is 0.3-2.0 dB. Soft combining can also be used to decrease the maximum packet delays. It is also shown that using slow power control instead of fast power control can increase the packet data capacity in the downlink.

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混合ARQ的宽带CDMA分组数据

分析了采用软合并的宽带CDMA分组数据的性能。首先，介绍了宽带CDMA的主要参数。W-CDMA指的是由ETSI决定为配对频段的UMTS空中接口进行标准化的空中接口。其次，介绍了采用分组软合并的W-CDMA分组传输方案。软合并是指将传输失败的软值与重传的软值合并后再馈送到信道解码器。将软合并方案的性能与非合并分组方案的性能进行了比较。结果表明，在不使用快速功率控制的情况下，软结合可以提高容量，并将小区范围扩展到2 dB。具有快速功率控制，增益为0.3-2.0 dB。软合并也可以用来减少最大数据包延迟。用慢功率控制代替快功率控制可以提高下行链路的分组数据容量。

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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1988 IEEE 5th International Symposium on Spread Spectrum Techniques and Applications - Proceedings. Spread Technology to Africa (Cat. No.98TH8333)

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