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非相干莱斯衰落信道--低功率区的频谱效率(II)

The Noncoherent Rician Fading Channel -- Part II : Spectral Efficiency in the Low-Power Regime

Mustafa Cenk Gursoy, H. Vincent Poor, Sergio Verdu

摘要:

考虑离散时间无记忆莱斯衰落信道上的信息传输,其中接收机和发射机都不知道衰落系数。当输入具有有限的峰值时,在低功率状态下检查频谱效率/比特能量折衷。它示出,如果施加四阶矩输入约束或输入峰均功率比是有限的,然后在平均功率受限的信道中观察到的行为相比,最小比特能量并不总是在零频谱效率实现。当存在不随平均功率变化的固定峰值限制时,低功率性能也被表征。提出了一种新的信令方案,覆盖相移键控的开关键控,并被证明是最佳的低功耗制度的效率。

英文摘要:

Transmission of information over a discrete-time memoryless Rician fading channel is considered where neither the receiver nor the transmitter knows the fading coefficients. The spectral-efficiency/bit-energy tradeoff in the low-power regime is examined when the input has limited peakedness. It is shown that if a fourth moment input constraint is imposed or the input peak-to-average power ratio is limited, then in contrast to the behavior observed in average power limited channels, the minimum bit energy is not always achieved at zero spectral efficiency. The low-power performance is also characterized when there is a fixed peak limit that does not vary with the average power. A new signaling scheme that overlays phase-shift keying on on-off keying is proposed and shown to be optimally efficient in the low-power regime.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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