Frequency hopping with multi-H CPM (MIL-STD-188-181B)

Abstract-We propose a new spread spectrum (SS) system based on continuous phase modulations (CPMs). The main idea is to exploit the sequence of modulation indices of a multi-h CPM as a frequency hopping (FH) sequence. We will show how the sequence of indices impacts on the CPM signal bandwidth and power spectral density (PSD). Spectral spreading, flatness and smoothness can be easily achieved by an appropriate choice of the maximum value of the modulation index and of the length of the index sequence. We will show that a CPM-based spread spectrum system achieves an overall spectral efficiency larger than that of a single-user single-h CPM signal even when a single-user detector is employed at the receiver.

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“…Nevertheless, FH has been used with the purpose of spreading the CPM power spectral density (PSD) for security issues in [7]) and [8]). …”

Section: Introductionmentioning

confidence: 99%

CPM-Based Spread Spectrum Systems for Multi-User Communications

Mazzali

Colavolpe²,

Buzzi

2013

IEEE Trans. Wireless Commun.

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“…To our knowledge, FH has never been studied as a multiple access technique in CPM-based systems. Nevertheless, FH has been used with the purpose of spreading the CPM power spectral density (PSD) for security issues in [10] and [11]. Here, a new multiple-access technique based on multi-h CPMs is proposed.…”

Section: Introductionmentioning

confidence: 99%

CPM-based spread spectrum systems for multi-user communications

Mazzali

Colavolpe

Buzzi

2012

2012 IEEE International Conference on Communications (ICC)

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Abstract-We propose a new spread spectrum (SS) system based on continuous-phase modulations (CPMs). The main idea is to exploit the sequence of modulation indices of a multi-h CPM as a frequency-hopping (FH) sequence. Spectral spreading, flatness and smoothness can be easily achieved by an appropriate choice of the maximum value of the modulation index and of the length of the index sequence. We will show that the proposed CPM-based spread spectrum system achieves an overall spectral efficiency larger than that of a single-user single-h CPM transmission even when a single-user detector is employed at the receiver. It also outperforms other solutions in the literature. In addition, we will also derive some suboptimal multi-user detectors.

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