A novel multiple-access scheme based on slow frequency-hopping multicarrier direct-sequence, code-division multiple access (SFH/MC DS-CDMA) is proposed and investigated, which can be rendered compatible with the existing second-generation narrow-band CDMA and third-generation wide-band CDMA systems. Blind joint soft-detection of the SFH/MC DS-CDMA signals is investigated, assuming that the receiver has no knowledge of the associated frequency-hopping (FH) patterns invoked. The system’s performance is evaluated over the range of Nakagami multipath fading channels. The results show that blind joint soft-detection achieves the required bit-error rate performance, while blindly acquiring the FH patterns employed. This is advantageous during the commencement of communications or during soft handover. Index Terms—Blind detection, code-division multiple access, constant-weight codes, frequency-hopping, orthogonal frequency-division multiplexing.
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机译：提出并研究了一种基于慢跳频多载波直接序列码分多址（SFH / MC DS-CDMA）的新颖多址方案，该方案可以与现有的第二代窄带CDMA兼容和第三代宽带CDMA系统。假设接收器不了解所调用的相关跳频（FH）模式，则研究SFH / MC DS-CDMA信号的盲联合软检测。该系统的性能在Nakagami多径衰落信道范围内进行评估。结果表明，盲联合软检测可实现所需的误码率性能，同时盲获取所采用的FH模式。这在通信开始或软切换期间是有利的。索引词-盲检测，码分多址，恒权码，跳频，正交频分复用。
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