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首页> 外文期刊>Systems Journal, IEEE >I/Q Column-Wise Complementary Codes for Interference-Resistant CDMA Communication Systems
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I/Q Column-Wise Complementary Codes for Interference-Resistant CDMA Communication Systems

机译:适用于抗干扰CDMA通信系统的I / Q列明智互补码

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摘要

Motivated by growing demand for high-speed wireless communications, we proposed to implement code division multiple access systems based on orthogonal complementary codes (OCC-CDMA). While an OCC-CDMA system indeed offers ideal correlation properties, its capacity is strictly constrained by the number of element codes each user may use. In this paper, we suggest to use in-phase/quadrature (I/Q) column-wise complementary (IQCC) codes to implement a CDMA system to support users, where stands for the number of element codes in a flock of IQCC codes assigned to a user. The IQCC codes were designed to fit quadrature phase-shift keying modulation, where odd and even chips can be transmitted via I and Q carriers. We analyze correlation properties of the IQCC codes and introduce a CDMA system design based on the codes. The analytical results show that out-of-phase autocorrelation and cross-correlation functions are zero for any relative time shifts. Thus, a CDMA system implemented by the IQCC codes has an inherent capability to mitigate multiple access interference and multipath interference.
机译:由于对高速无线通信的需求不断增长,我们提议实现基于正交互补码(OCC-CDMA)的码分多址系统。尽管OCC-CDMA系统确实提供了理想的相关特性,但其容量受到每个用户可能使用的元素代码数量的严格限制。在本文中,我们建议使用同相/正交(I / Q)逐列互补(IQCC)代码来实现CDMA系统以支持用户,其中代表一组分配的IQCC代码中的元素代码数量给用户。 IQCC代码被设计为适合正交相移键控调制,其中奇数和偶数码片可以通过I和Q载波传输。我们分析了IQCC代码的相关特性,并介绍了基于这些代码的CDMA系统设计。分析结果表明,对于任何相对时移,异相自相关和互相关函数均为零。因此,由IQCC码实现的CDMA系统具有固有的能力来减轻多址干扰和多径干扰。

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