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Wideband CDMA system for personal radio communications

机译:用于个人无线电通信的宽带CDMA系统

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摘要

This article describes a wideband spread code-division multiple access (W-CDMA) system for high-capacity and high-quality personal radio communication. This system has been authorized as an EIA/TIA Interim Standard IS-665, T1P1 Trial Use Standard J-STD-015, and ITU-R Recommendation M 1073. The system uses wideband spreading to accomplish good interference immunity, high-quality speech, and high-speed data transmission. The system uses coherent detection (CD) and an interference canceller system (ICS) to enhance the capacity. The CD and ICS use continuous pilot signals in the forward/reverse links to estimate the propagation path parameters. PN and Hadamard sequences are used as the spreading code for minimal mutual interference between traffic and pilot/sync/paging channels. A robust 32 kb/s waveform speech coder, ITU-T COM101+, has been developed to achieve toll-quality speech in the radio environment. This system provides up to 128 voice channels per cell and data transmission up to 64 kb/s by 5 MHz spreading. Unification of low- and high-mobility applications and reduced complexity of system and hardware configurations are accomplished.
机译:本文介绍了一种用于大容量和高质量个人无线电通信的宽带扩展码分多址(W-CDMA)系统。此系统已被批准为EIA / TIA临时标准IS-665,T1P1试用标准J-STD-015和ITU-R建议M1073。该系统使用宽带扩展来实现良好的抗干扰性,高质量的语音,和高速数据传输。该系统使用相干检测(CD)和干扰消除器系统(ICS)来增强容量。 CD和ICS在前向/反向链路中使用连续的导频信号来估计传播路径参数。 PN和Hadamard序列用作扩展码,以最小化业务量与导频/同步/寻呼信道之间的相互干扰。已经开发出功能强大的32 kb / s波形语音编码器ITU-T COM101 +,以在无线电环境中实现收费质量的语音。该系统每个单元最多可提供128个语音通道,并通过5 MHz扩展提供高达64 kb / s的数据传输。低流量和高流量应用程序的统一以及系统和硬件配置的降低的复杂性得以实现。

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