Aperiodic autocorrelation and crosscorrelation of polyphase sequences

Mow, Wai Ho; Li, S.-Y.R.

doi:10.1109/18.568711

Cited by 25 publications

(1 citation statement)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this case, since signals issued by different users reach the receiver with independent timing, the underlying Zadoff-Chu sequences of the different links overlap asynchronously, and interference will appear at the correlator output, depending on their aperiodic crosscorrelation. The correlation properties of polyphase sequences have been extensively studied in the literature, see, e.g., [33], [34], [35], [36], and [37] eventually derived the aperiodic cross-correlation bounds for Zadoff-Chu sequences. These bounds show the very good aperiodic correlation properties of Zadoff-Chu sequences, as illustrated in the example of Fig.…”

Section: The Golden Modulation: Multiple Link Description and Perform...mentioning

confidence: 99%

Golden Modulation: A New and Effective Waveform for Massive IoT

Vangelista,

Jechoux,

Canonici

et al. 2024

IEEE Trans. Commun.

View full text Add to dashboard Cite

Massive Internet of Things systems, e.g., Low Power Wide Area Networks, aim at connecting very large numbers of low-cost devices with multi-year battery life requirements, a goal that is hard to achieve with current technologies. In this paper, a novel asynchronous spread spectrum technique, called Golden Modulation, is introduced. This modulation provides a vast family of equivalent waveforms with very low cross-correlation even in asynchronous conditions, hence enabling naturally massive multiuser operation without the need for inter-user synchronization or interference cancellation receivers. The basic modulation principles, which rely on spectrum spreading via direct Zadoff-Chu sequences modulation, are presented and the corresponding theoretical bit error rate performance in additive white Gaussian noise and multi-path channels is derived and compared by simulation with realistic receiver performance. The demodulation of the Golden Modulation is described, and its performance in the presence of uncoordinated multiple users is characterized and compared against LoRa in a variety of scenarios. Various higher-layer and backward compatibility issues are also discussed.

show abstract