Carrier Aggregation of Three OFDM Signals Using a Single Oscillator and I/Q Modulator

Abyaneh, Mohammad Abdi; Huyart, B.; Cousin, Jean-Christophe

doi:10.1109/tmtt.2017.2669988

Cited by 4 publications

(2 citation statements)

References 17 publications

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“…Shannon's theorem [12][13][14][15][16] states that channel capacity is directly proportional to channel bandwidth. To this end, the carrier aggregation technique [17][18][19][20][21][22] has been extensively used in modern mobile communication networks and Wi-Fi networks. This technique dynamically reuses idle frequency channels, including intra-band and inter-band channels, to increase overall data throughput.…”

Section: Introductionmentioning

confidence: 99%

In-band full-duplex dual-band transceiver based on single-core multiport architecture

Cheong,

TU,

Liu

et al. 2024

Preprint

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Ultra-fast and energy-efficient connections are the keys to future wireless communication technologies. However, even in full duplex communication systems, the accessible spectrum is portioned because up-links and down-links are set to occupy non-overlapping frequency channels. Here we report an unprecedented in-band full-duplex transceiver architecture, a significant departure from conventional designs. This architecture allows the up-links and down-links to co-exist in the same frequency bands with the same multiport network simultaneously. Leveraging the unique orthogonal properties of the multiport network in signal transmission and reception, we ensure a high degree of isolation between the two links. Our findings demonstrate that this in-band full-duplex dual-band communication system can achieve up to 1 gigabit per second when operating at sub-6 GHz. Furthermore, we show that this transceiver system exhibits excellent immunity to interference and extremely low fluctuations in bit error rates during communication.

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Section: Introductionmentioning

confidence: 99%

In-band full-duplex dual-band transceiver based on single-core multiport architecture

Cheong,

TU,

Liu

et al. 2024

Preprint

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“…However, in the scenario where the frequency spacing between carriers is quite large, the sampling rate of DAC has to be extremely high accordingly, causing a considerable power consumption and intensifying the complexity of DAC. In [3] and [4], the sampling rates of DAC are as high as 2.4 and 1.14 GS/s, respectively.…”

Section: Introductionmentioning

confidence: 99%

A Carrier Aggregation Transmitter Front End for 5-GHz WLAN 802.11ax Application in 40-nm CMOS

Liu

Yang

et al. 2020

IEEE Trans. Microwave Theory Techn.

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Carrier aggregation will be a key feature of the emerging 802.11ax system to boost data rate. Voltage-controlled oscillator (VCO) pulling and crosstalk between RF channels are two main problems related to carrier aggregation, which introduce severe impacts on adjacent channel leakage ratio (ACLR) and error vector magnitude (EVM). To address these two problems, high isolation between transmitter channels is required, but may not be realizable in some practical cases due to the constraint of the layout. This article presents a transmitter front end that can support two-carrier aggregation for 802.11ax without high on-chip isolation. The proposed transmitter front end employs a parallel direct conversion and double conversion configuration, and two carriers are combined before the power amplifier (PA). In this way, the intrinsic problems of VCO pulling and crosstalk can be mitigated. The proposed transmitter front end was implemented in a 40-nm CMOS technology. For contiguous intraband carrier aggregation with VHT80, MCS9 signals [80-MHz bandwidth, 256-quadrature amplitude modulation (QAM), and 11.25-dB peak-to-average power ratio (PAPR)], the transmitter front end delivers an average output power of 5.3 + 4.8 dBm for two carriers with an EVM of ≤−32 dB, and the EVM can reach −36.1 dB.

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Research on Irregular Carrier Aggregation in Complex Electromagnetic Environment

Wang

2018

Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering

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Carrier Aggregation of Three OFDM Signals Using a Single Oscillator and I/Q Modulator

Cited by 4 publications

References 17 publications

In-band full-duplex dual-band transceiver based on single-core multiport architecture

In-band full-duplex dual-band transceiver based on single-core multiport architecture

A Carrier Aggregation Transmitter Front End for 5-GHz WLAN 802.11ax Application in 40-nm CMOS

Research on Irregular Carrier Aggregation in Complex Electromagnetic Environment

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