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<p>Next-generation Global Navigation Satellite Systems (GNSS) transmit multiple signal components simultaneously on the same frequency to deliver diverse positioning, navigation, and timing (PNT) services. This requirement places stringent demands on the efficiency and flexibility of constant-envelope multiplexing (CEM) techniques. In this paper, a dual-frequency constant-envelope multiplexing (DCEM) method, termed generalized asymmetric constant envelope binary offset carrier (GACE-BOC) multiplexing, is proposed to deal with the shortcomings of existing DCEM techniques including low efficiency and insufficient flexibility in supporting the number, power allocation, and modulation options of components due to a restricted solution space for intermodulation (IM) terms. The GACE-BOC multiplexing technique could achieve higher multiplexing efficiency than existing CEM techniques. Moreover, it offers enhanced design flexibility in term of the number, power allocation and modulation of components. Furthermore, it enables the hybrid multiplexing of continuous phase modulation (CPM) components with non-continuous phase modulation (non-CPM) components, a capability not supported by other CEM methods.</p>

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GACE-BOC: a generalized dual-frequency constant-envelope multiplexing for next-generation GNSS

  • 期刊论文

  • 发表日期：

    2026年4月8日

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  • Menglei Guo,
  • Zheng Yao,
  • Mingquan Lu

摘要

Next-generation Global Navigation Satellite Systems (GNSS) transmit multiple signal components simultaneously on the same frequency to deliver diverse positioning, navigation, and timing (PNT) services. This requirement places stringent demands on the efficiency and flexibility of constant-envelope multiplexing (CEM) techniques. In this paper, a dual-frequency constant-envelope multiplexing (DCEM) method, termed generalized asymmetric constant envelope binary offset carrier (GACE-BOC) multiplexing, is proposed to deal with the shortcomings of existing DCEM techniques including low efficiency and insufficient flexibility in supporting the number, power allocation, and modulation options of components due to a restricted solution space for intermodulation (IM) terms. The GACE-BOC multiplexing technique could achieve higher multiplexing efficiency than existing CEM techniques. Moreover, it offers enhanced design flexibility in term of the number, power allocation and modulation of components. Furthermore, it enables the hybrid multiplexing of continuous phase modulation (CPM) components with non-continuous phase modulation (non-CPM) components, a capability not supported by other CEM methods.