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Blind User Detection in Doubly Dispersive DS/CDMA Fading Channels

机译:双色散DS / CDMA衰落信道中的盲用户检测

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摘要

In this work, we consider the problem of detecting the presence of a new user in a direct-sequence/code-division-multiple-access (DS/CDMA) system with a doubly dispersive fading channel, and we propose a novel blind detection strategy that only requires knowledge of the spreading code of the user to be detected, but no prior information as to the time-varying channel impulse response and the structure of the multiaccess interference. The proposed detector has a bounded constant false alarm rate (CFAR) under the design assumptions while providing satisfactory detection performance even in the presence of strong cochannel interference and high user mobility.
机译:在这项工作中,我们考虑了在具有双色散衰落信道的直接序列/码分多址(DS / CDMA)系统中检测新用户的存在的问题,并提出了一种新颖的盲检测策略这仅需要知道要检测的用户的扩展码的知识,而无需关于时变信道脉冲响应和多址干扰的结构的先验信息。所提出的检测器在设计假设下具有有界的恒定虚警率(CFAR),即使在存在强同信道干扰和高用户移动性的情况下,也能提供令人满意的检测性能。

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